TelegramBotAdmin/wbb/utils/dbservice.py

from __future__ import annotations

import hashlib
import json
import math
import re
from collections import defaultdict
from datetime import UTC, datetime, timedelta
from decimal import Decimal, InvalidOperation
from secrets import token_urlsafe
from typing import Any
from uuid import uuid4

from cryptography.fernet import Fernet, InvalidToken
from pymongo import ASCENDING, DESCENDING, ReturnDocument
from pymongo.errors import DuplicateKeyError

import wbb
from wbb import control_db

templatesdb = control_db.service_package_templates
ordersdb = control_db.service_orders
quotesdb = control_db.service_order_quotes
addressesdb = control_db.service_order_addresses
eventsdb = control_db.service_order_events
customersdb = control_db.customer_profiles
blocksdb = control_db.customer_blocks
reportsdb = control_db.service_reports
qrdb = control_db.teacher_review_qr_records
reviewtemplatesdb = control_db.teacher_review_templates
reviewdraftsdb = control_db.teacher_review_drafts
reviewsdb = control_db.teacher_reviews
statsdb = control_db.teacher_review_stats
profilesdb = control_db.directory_profiles
locationsdb = control_db.directory_locations
membershipsdb = control_db.directory_memberships
settingsdb = control_db.directory_settings

SERVICE_MODES = {"at_store", "onsite"}
PRICE_MODES = {"fixed", "starting_at", "range", "negotiable"}
PRICE_UNITS = {"per_service", "per_hour", "per_item", "per_visit"}
TRAVEL_FEE_MODES = {"included", "fixed", "per_km", "quoted"}
ORDER_ACTIVE_STATUSES = {
    "requested",
    "quoted",
    "confirmed",
    "in_progress",
    "completion_pending",
    "disputed",
}
ORDER_TERMINAL_STATUSES = {
    "completed",
    "rejected",
    "canceled_customer",
    "canceled_technician",
    "voided",
}
ORDER_STATUSES = ORDER_ACTIVE_STATUSES | ORDER_TERMINAL_STATUSES
REVIEW_SOURCES = {"qr_verified", "student_initiated"}
REVIEW_STATUSES = {"pending", "approved", "rejected", "withdrawn", "voided"}
DEFAULT_REVIEW_TEMPLATE = {
    "rating_questions": [
        {
            "question_id": "service_effect",
            "label": "服务效果",
            "description": "本次服务是否达到预期。",
            "required": True,
            "weight": 40,
        },
        {
            "question_id": "professionalism",
            "label": "专业程度",
            "description": "技师的专业能力与服务规范。",
            "required": True,
            "weight": 30,
        },
        {
            "question_id": "communication",
            "label": "沟通体验",
            "description": "沟通是否清晰、友好。",
            "required": True,
            "weight": 30,
        },
    ],
    "text_questions": [
        {
            "question_id": "comment",
            "label": "评价内容",
            "description": "分享真实体验，避免包含隐私信息。",
            "required": False,
            "max_length": 500,
        }
    ],
}

_indexes_ready = False


class ServiceDataError(ValueError):
    def __init__(self, code: str, message: str):
        super().__init__(message)
        self.code = code


def utc_now() -> datetime:
    return datetime.now(UTC)


def _as_utc(value: datetime) -> datetime:
    return value.replace(tzinfo=UTC) if value.tzinfo is None else value.astimezone(UTC)


def _clean_text(value: Any, *, max_length: int, required: bool = False) -> str:
    text = re.sub(r"[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]", "", str(value or ""))
    text = " ".join(text.strip().split())
    if required and not text:
        raise ServiceDataError("required_field", "必填内容不能为空。")
    if len(text) > max_length:
        raise ServiceDataError("text_too_long", f"内容不能超过 {max_length} 个字符。")
    return text


def _positive_decimal(value: Any, field: str, *, allow_zero: bool = True) -> str:
    try:
        number = Decimal(str(value or 0)).quantize(Decimal("0.01"))
    except (InvalidOperation, ValueError) as exc:
        raise ServiceDataError("invalid_price", f"{field} 必须是有效金额。") from exc
    if not number.is_finite():
        raise ServiceDataError("invalid_price", f"{field} 必须是有效金额。")
    if number < 0 or (not allow_zero and number == 0):
        raise ServiceDataError("invalid_price", f"{field} 不能小于 0。")
    return format(number, "f")


def _normalize_tags(values: Any) -> list[str]:
    if isinstance(values, str):
        values = values.replace("，", ",").split(",")
    tags = []
    for value in values or []:
        tag = _clean_text(value, max_length=20)
        if tag and tag.casefold() not in {item.casefold() for item in tags}:
            tags.append(tag)
    if len(tags) > 8:
        raise ServiceDataError("too_many_tags", "服务标签最多 8 个。")
    return tags


def normalize_package(value: dict[str, Any], *, package_id: str | None = None) -> dict[str, Any]:
    modes = list(dict.fromkeys(str(item) for item in value.get("service_modes", [])))
    if not modes or set(modes) - SERVICE_MODES:
        raise ServiceDataError("invalid_service_mode", "套餐必须选择到店或上门服务方式。")
    price_mode = str(value.get("price_mode") or "negotiable")
    if price_mode not in PRICE_MODES:
        raise ServiceDataError("invalid_price_mode", "不支持该价格模式。")
    price_unit = str(value.get("price_unit") or "per_service")
    if price_unit not in PRICE_UNITS:
        raise ServiceDataError("invalid_price_unit", "不支持该计价单位。")
    currency = str(value.get("currency") or "CNY").upper()
    if not re.fullmatch(r"[A-Z]{3}", currency):
        raise ServiceDataError("invalid_currency", "币种必须使用三位 ISO 代码。")
    min_price = _positive_decimal(value.get("min_price"), "最低价格")
    max_price = _positive_decimal(value.get("max_price"), "最高价格")
    if Decimal(max_price) and Decimal(max_price) < Decimal(min_price):
        raise ServiceDataError("invalid_price_range", "最高价格不能低于最低价格。")
    if price_mode == "fixed" and Decimal(min_price) != Decimal(max_price):
        raise ServiceDataError("invalid_fixed_price", "固定价的最低价格和最高价格必须一致。")
    duration = value.get("duration_minutes")
    if duration in (None, "", 0, "0"):
        duration = None
    else:
        try:
            duration = int(duration)
        except (TypeError, ValueError) as exc:
            raise ServiceDataError("invalid_duration", "服务时长必须是分钟数。") from exc
        if not 15 <= duration <= 480:
            raise ServiceDataError("invalid_duration", "服务时长必须在 15 到 480 分钟之间。")
    travel = value.get("travel_fee") if isinstance(value.get("travel_fee"), dict) else {}
    travel_mode = str(travel.get("mode") or "quoted")
    if travel_mode not in TRAVEL_FEE_MODES:
        raise ServiceDataError("invalid_travel_fee", "不支持该交通费模式。")
    addons = []
    for item in value.get("addons", []) or []:
        if len(addons) >= 10:
            raise ServiceDataError("too_many_addons", "标准加项最多 10 个。")
        addons.append(
            {
                "addon_id": str(item.get("addon_id") or uuid4().hex),
                "name": _clean_text(item.get("name"), max_length=40, required=True),
                "unit": _clean_text(item.get("unit"), max_length=20) or "项",
                "price": _positive_decimal(item.get("price"), "加项价格"),
                "extra_minutes": max(0, min(480, int(item.get("extra_minutes") or 0))),
            }
        )
    radius = value.get("service_radius_km")
    if radius in (None, ""):
        radius = None
    else:
        radius = float(radius)
        if not 0.5 <= radius <= 200:
            raise ServiceDataError("invalid_service_radius", "上门半径必须在 0.5 到 200 公里之间。")
    if "onsite" in modes and radius is None:
        raise ServiceDataError("service_radius_required", "上门套餐必须填写服务半径。")
    out_of_range_policy = _clean_text(
        value.get("out_of_range_policy"),
        max_length=200,
        required="onsite" in modes,
    )
    source_type = str(value.get("source_type") or "custom")
    if source_type not in {"template", "custom"}:
        raise ServiceDataError("invalid_package_source", "套餐来源无效。")
    return {
        "package_id": str(package_id or value.get("package_id") or uuid4().hex),
        "name": _clean_text(value.get("name"), max_length=50, required=True),
        "category": _clean_text(value.get("category"), max_length=30, required=True),
        "description": _clean_text(value.get("description"), max_length=800, required=True),
        "tags": _normalize_tags(value.get("tags", [])),
        "service_modes": modes,
        "price_mode": price_mode,
        "currency": currency,
        "price_unit": price_unit,
        "min_price": min_price,
        "max_price": max_price,
        "price_display": _clean_text(value.get("price_display"), max_length=80),
        "duration_minutes": duration,
        "included_items": _clean_text(value.get("included_items"), max_length=500),
        "excluded_items": _clean_text(value.get("excluded_items"), max_length=500),
        "preparation": _clean_text(value.get("preparation"), max_length=500),
        "addons": addons,
        "travel_fee": {
            "mode": travel_mode,
            "amount": _positive_decimal(travel.get("amount"), "交通费"),
            "per_km": _positive_decimal(travel.get("per_km"), "每公里交通费"),
            "description": _clean_text(travel.get("description"), max_length=200),
        },
        "service_radius_km": radius,
        "out_of_range_policy": out_of_range_policy,
        "source_type": source_type,
        "source_template_id": value.get("source_template_id"),
        "source_template_version": value.get("source_template_version"),
        "customized_from_template": bool(value.get("customized_from_template")),
    }


def _normalize_profile(value: dict[str, Any]) -> dict[str, Any]:
    packages = [normalize_package(item) for item in value.get("packages", [])]
    if not 1 <= len(packages) <= 5:
        raise ServiceDataError("invalid_package_count", "技师必须发布 1 到 5 个套餐。")
    modes = sorted({mode for item in packages for mode in item["service_modes"]})
    venue = value.get("venue") if isinstance(value.get("venue"), dict) else {}
    onsite = value.get("onsite_policy") if isinstance(value.get("onsite_policy"), dict) else {}
    public_area_text = _clean_text(
        value.get("public_area_text"), max_length=80, required=True
    )
    venue_name = _clean_text(
        venue.get("name"), max_length=80, required="at_store" in modes
    )
    venue_address = _clean_text(
        venue.get("address_hint"), max_length=120, required="at_store" in modes
    )
    onsite_description = _clean_text(
        onsite.get("description"), max_length=300, required="onsite" in modes
    )
    return {
        "headline": _clean_text(value.get("headline"), max_length=80, required=True),
        "bio": _clean_text(value.get("bio"), max_length=800, required=True),
        "tags": _normalize_tags(value.get("tags", [])),
        "contact_hours": _clean_text(value.get("contact_hours"), max_length=120, required=True),
        "service_modes": modes,
        "accepting_requests": bool(value.get("accepting_requests", True)),
        "public_area_text": public_area_text,
        "venue": {
            "name": venue_name,
            "address_hint": venue_address,
        },
        "onsite_policy": {
            "description": onsite_description,
        },
        "packages": packages,
        "is_complete": True,
    }


async def ensure_service_indexes() -> None:
    global _indexes_ready
    if _indexes_ready:
        return
    await templatesdb.create_index([("template_id", ASCENDING)], unique=True)
    await templatesdb.create_index([("status", ASCENDING), ("sort_order", ASCENDING)])
    await ordersdb.create_index([("order_id", ASCENDING)], unique=True)
    await ordersdb.create_index([("customer_id", ASCENDING), ("created_at", DESCENDING)])
    await ordersdb.create_index([("technician_id", ASCENDING), ("created_at", DESCENDING)])
    await ordersdb.create_index([("status", ASCENDING), ("updated_at", DESCENDING)])
    await quotesdb.create_index([("quote_id", ASCENDING)], unique=True)
    await quotesdb.create_index([("order_id", ASCENDING), ("version", DESCENDING)], unique=True)
    await addressesdb.create_index([("order_id", ASCENDING)], unique=True)
    await addressesdb.create_index([("redact_after", ASCENDING)])
    await eventsdb.create_index([("event_id", ASCENDING)], unique=True)
    await eventsdb.create_index([("order_id", ASCENDING), ("created_at", ASCENDING)])
    await customersdb.create_index([("user_id", ASCENDING)], unique=True)
    await blocksdb.create_index([("scope", ASCENDING), ("technician_id", ASCENDING), ("customer_id", ASCENDING)], unique=True)
    await reportsdb.create_index([("report_id", ASCENDING)], unique=True)
    await qrdb.create_index([("qr_id", ASCENDING)], unique=True)
    await qrdb.create_index([("token_hash", ASCENDING)], unique=True)
    await qrdb.create_index([("order_id", ASCENDING), ("created_at", DESCENDING)])
    await reviewtemplatesdb.create_index([("version", DESCENDING)], unique=True)
    await reviewdraftsdb.create_index([("customer_id", ASCENDING)], unique=True)
    await reviewdraftsdb.create_index([("expires_at", ASCENDING)], expireAfterSeconds=0)
    await reviewsdb.create_index([("review_id", ASCENDING)], unique=True)
    await reviewsdb.create_index([("qr_id", ASCENDING)], unique=True, sparse=True)
    await reviewsdb.create_index([("technician_id", ASCENDING), ("status", ASCENDING), ("created_at", DESCENDING)])
    await statsdb.create_index([("technician_id", ASCENDING), ("category", ASCENDING)], unique=True)
    _indexes_ready = True


async def record_service_event(
    order_id: str,
    event_type: str,
    *,
    actor_id: int | str,
    reason: str = "",
    metadata: dict[str, Any] | None = None,
) -> dict[str, Any]:
    await ensure_service_indexes()
    document = {
        "event_id": uuid4().hex,
        "order_id": str(order_id),
        "event_type": str(event_type),
        "actor_id": actor_id,
        "reason": _clean_text(reason, max_length=500),
        "metadata": metadata or {},
        "created_at": utc_now(),
    }
    await eventsdb.insert_one(document)
    return document


async def record_service_funnel_event(user_id: int, event_type: str) -> dict[str, Any]:
    if event_type not in {"directory_viewed", "technician_viewed", "request_started"}:
        raise ServiceDataError("invalid_funnel_event", "不支持该履约漏斗事件。")
    return await record_service_event(
        "",
        event_type,
        actor_id=int(user_id),
        metadata={"funnel": True},
    )


async def observe_customer(user: Any, *, accepted_terms: bool = False) -> dict[str, Any]:
    await ensure_service_indexes()
    now = utc_now()
    display_name = " ".join(
        value for value in (str(getattr(user, "first_name", "") or "").strip(), str(getattr(user, "last_name", "") or "").strip()) if value
    ) or f"用户 {user.id}"
    updates: dict[str, Any] = {
        "username": getattr(user, "username", None),
        "display_name": display_name,
        "updated_at": now,
    }
    if accepted_terms:
        updates["terms_accepted_at"] = now
    await customersdb.update_one(
        {"user_id": int(user.id)},
        {"$set": updates, "$setOnInsert": {"created_at": now, "blocked": False}},
        upsert=True,
    )
    return await customersdb.find_one({"user_id": int(user.id)}) or {}


async def require_customer_allowed(user_id: int) -> dict[str, Any]:
    await ensure_service_indexes()
    customer = await customersdb.find_one({"user_id": int(user_id)})
    if not customer or not customer.get("terms_accepted_at"):
        raise ServiceDataError("terms_required", "请先接受服务规则和隐私说明。")
    if customer.get("blocked"):
        raise ServiceDataError("customer_blocked", "你的服务功能已被暂停。")
    global_block = await blocksdb.find_one({"scope": "global", "customer_id": int(user_id), "active": True})
    if global_block:
        raise ServiceDataError("customer_blocked", "你的服务功能已被暂停。")
    return customer


async def get_service_settings() -> dict[str, int]:
    stored = await settingsdb.find_one({"settings_id": "global"}) or {}
    return {
        "customer_max_open_orders": max(
            1,
            min(
                20,
                int(
                    stored.get("service_customer_max_open_orders")
                    or getattr(wbb, "SERVICE_CUSTOMER_MAX_OPEN_ORDERS", 3)
                    or 3
                ),
            ),
        ),
        "customer_daily_request_limit": max(
            1,
            min(
                100,
                int(
                    stored.get("service_customer_daily_request_limit")
                    or getattr(wbb, "SERVICE_CUSTOMER_DAILY_REQUEST_LIMIT", 10)
                    or 10
                ),
            ),
        ),
        "review_qr_expiry_hours": max(
            1,
            min(
                168,
                int(
                    stored.get("service_review_qr_expiry_hours")
                    or getattr(wbb, "SERVICE_REVIEW_QR_EXPIRY_HOURS", 24)
                    or 24
                ),
            ),
        ),
    }


async def set_service_settings(values: dict[str, Any]) -> dict[str, int]:
    current = await get_service_settings()
    try:
        normalized = {
            "customer_max_open_orders": max(
                1,
                min(20, int(values.get("customer_max_open_orders", current["customer_max_open_orders"]))),
            ),
            "customer_daily_request_limit": max(
                1,
                min(
                    100,
                    int(
                        values.get(
                            "customer_daily_request_limit",
                            current["customer_daily_request_limit"],
                        )
                    ),
                ),
            ),
            "review_qr_expiry_hours": max(
                1,
                min(168, int(values.get("review_qr_expiry_hours", current["review_qr_expiry_hours"]))),
            ),
        }
    except (TypeError, ValueError) as exc:
        raise ServiceDataError("invalid_service_settings", "履约设置必须是有效整数。") from exc
    await settingsdb.update_one(
        {"settings_id": "global"},
        {
            "$set": {
                "service_customer_max_open_orders": normalized["customer_max_open_orders"],
                "service_customer_daily_request_limit": normalized["customer_daily_request_limit"],
                "service_review_qr_expiry_hours": normalized["review_qr_expiry_hours"],
                "updated_at": utc_now(),
            },
            "$setOnInsert": {"created_at": utc_now()},
        },
        upsert=True,
    )
    return normalized


async def list_package_templates(*, include_archived: bool = False) -> list[dict[str, Any]]:
    await ensure_service_indexes()
    filters = {} if include_archived else {"status": {"$ne": "archived"}}
    return await templatesdb.find(filters).sort([("sort_order", ASCENDING), ("created_at", ASCENDING)]).to_list(length=500)


async def create_package_template(values: dict[str, Any], *, actor_id: str) -> dict[str, Any]:
    await ensure_service_indexes()
    now = utc_now()
    package = normalize_package(values.get("package") or values)
    package["source_type"] = "template"
    document = {
        "template_id": uuid4().hex,
        "version": 1,
        "name": _clean_text(values.get("template_name") or package["name"], max_length=80, required=True),
        "admin_note": _clean_text(values.get("admin_note"), max_length=500),
        "package": package,
        "status": "enabled" if values.get("enabled", True) else "disabled",
        "sort_order": int(values.get("sort_order") or 0),
        "created_by": str(actor_id),
        "created_at": now,
        "updated_at": now,
    }
    await templatesdb.insert_one(document)
    return document


async def update_package_template(template_id: str, values: dict[str, Any], *, actor_id: str) -> dict[str, Any]:
    current = await templatesdb.find_one({"template_id": str(template_id)})
    if not current:
        raise ServiceDataError("template_not_found", "未找到套餐模板。")
    package = normalize_package(values.get("package") or values, package_id=current["package"]["package_id"])
    package["source_type"] = "template"
    updated = await templatesdb.find_one_and_update(
        {"template_id": str(template_id)},
        {
            "$set": {
                "name": _clean_text(values.get("template_name") or package["name"], max_length=80, required=True),
                "admin_note": _clean_text(values.get("admin_note"), max_length=500),
                "package": package,
                "sort_order": int(values.get("sort_order") or 0),
                "updated_by": str(actor_id),
                "updated_at": utc_now(),
            },
            "$inc": {"version": 1},
        },
        return_document=ReturnDocument.AFTER,
    )
    return updated or {}


async def set_package_template_status(template_id: str, action: str, *, actor_id: str) -> dict[str, Any]:
    status_map = {"enable": "enabled", "disable": "disabled", "archive": "archived"}
    if action not in status_map:
        raise ServiceDataError("invalid_template_action", "不支持该模板操作。")
    updated = await templatesdb.find_one_and_update(
        {"template_id": str(template_id)},
        {"$set": {"status": status_map[action], "updated_by": str(actor_id), "updated_at": utc_now()}},
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        raise ServiceDataError("template_not_found", "未找到套餐模板。")
    return updated


async def duplicate_package_template(template_id: str, *, actor_id: str) -> dict[str, Any]:
    current = await templatesdb.find_one({"template_id": str(template_id)})
    if not current:
        raise ServiceDataError("template_not_found", "未找到套餐模板。")
    values = {
        "template_name": f"{current['name']}（副本）",
        "admin_note": current.get("admin_note", ""),
        "sort_order": current.get("sort_order", 0),
        "enabled": False,
        "package": current["package"],
    }
    return await create_package_template(values, actor_id=actor_id)


async def publish_technician_profile(user_id: int, values: dict[str, Any], *, actor_id: int | str) -> dict[str, Any]:
    await ensure_service_indexes()
    profile = await profilesdb.find_one({"user_id": int(user_id)})
    if not profile or profile.get("application_status") != "approved":
        raise ServiceDataError("technician_required", "只有已认证技师可以发布服务资料。")
    if not profile.get("username"):
        raise ServiceDataError("username_required", "技师必须设置有效的 Telegram 用户名。")
    if not await locationsdb.find_one({"user_id": int(user_id)}):
        raise ServiceDataError("technician_location_required", "技师必须设置有效服务位置。")
    if not await membershipsdb.find_one({"user_id": int(user_id), "active": True}):
        raise ServiceDataError("technician_membership_required", "技师必须仍是受管群当前成员。")
    normalized = _normalize_profile(values)
    now = utc_now()
    normalized.update({"updated_at": now, "updated_by": actor_id, "version": int((profile.get("service_profile") or {}).get("version") or 0) + 1})
    await profilesdb.update_one(
        {"user_id": int(user_id)},
        {"$set": {"service_profile": normalized, "updated_at": now}},
    )
    return await profilesdb.find_one({"user_id": int(user_id)}) or {}


async def get_technician_service_profile(user_id: int) -> dict[str, Any]:
    profile = await profilesdb.find_one({"user_id": int(user_id)})
    if not profile:
        raise ServiceDataError("technician_not_found", "未找到技师资料。")
    return profile


async def instantiate_package_template(template_id: str) -> dict[str, Any]:
    template = await templatesdb.find_one(
        {"template_id": str(template_id), "status": "enabled"}
    )
    if not template:
        raise ServiceDataError("template_not_found", "套餐模板不存在或已停用。")
    package = dict(template["package"])
    package.update(
        {
            "package_id": uuid4().hex,
            "source_type": "template",
            "source_template_id": template["template_id"],
            "source_template_version": template["version"],
            "customized_from_template": False,
        }
    )
    return package


def _fernet() -> Fernet:
    raw = str(getattr(wbb, "SERVICE_ADDRESS_ENCRYPTION_KEY", "") or "").strip()
    if not raw:
        raise ServiceDataError("address_encryption_required", "服务地址加密密钥尚未配置。")
    try:
        return Fernet(raw.encode())
    except (ValueError, TypeError) as exc:
        raise ServiceDataError("invalid_address_encryption_key", "服务地址加密密钥无效。") from exc


def _encrypt_address(payload: dict[str, Any]) -> str:
    return _fernet().encrypt(json.dumps(payload, ensure_ascii=False, separators=(",", ":")).encode()).decode()


def _decrypt_address(token: str) -> dict[str, Any]:
    try:
        return json.loads(_fernet().decrypt(str(token).encode()).decode())
    except (InvalidToken, ValueError, json.JSONDecodeError) as exc:
        raise ServiceDataError("address_unavailable", "精确地址无法解密。") from exc


async def _schedule_address_redaction(order_id: str, closed_at: datetime) -> None:
    retention = max(
        1,
        min(365, int(getattr(wbb, "SERVICE_ADDRESS_RETENTION_DAYS", 7) or 7)),
    )
    await addressesdb.update_one(
        {"order_id": str(order_id), "redacted": False},
        {
            "$set": {
                "redact_after": closed_at + timedelta(days=retention),
                "updated_at": closed_at,
            }
        },
    )


def _distance_meters(lon1: float, lat1: float, lon2: float, lat2: float) -> float:
    radius = 6_371_000.0
    phi1, phi2 = math.radians(lat1), math.radians(lat2)
    delta_phi = math.radians(lat2 - lat1)
    delta_lambda = math.radians(lon2 - lon1)
    a = math.sin(delta_phi / 2) ** 2 + math.cos(phi1) * math.cos(phi2) * math.sin(delta_lambda / 2) ** 2
    return radius * 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))


def distance_band(distance_meters: float) -> str:
    km = max(0.0, distance_meters / 1000)
    for threshold in (1, 3, 5, 10, 20, 50):
        if km <= threshold:
            return f"{threshold} 公里内"
    return "50 公里以上"


async def _get_package(technician_id: int, package_id: str) -> tuple[dict[str, Any], dict[str, Any]]:
    profile = await profilesdb.find_one({"user_id": int(technician_id)})
    if not profile or profile.get("application_status") != "approved":
        raise ServiceDataError("technician_not_found", "未找到已认证技师。")
    if not profile.get("listed") or not profile.get("username"):
        raise ServiceDataError("technician_unavailable", "该技师暂未公开接单。")
    if not await membershipsdb.find_one({"user_id": int(technician_id), "active": True}):
        raise ServiceDataError("technician_unavailable", "该技师当前不满足接单资格。")
    service_profile = profile.get("service_profile") or {}
    if not service_profile.get("is_complete") or not service_profile.get("accepting_requests", True):
        raise ServiceDataError("technician_unavailable", "该技师暂未接单。")
    package = next((item for item in service_profile.get("packages", []) if str(item.get("package_id")) == str(package_id)), None)
    if not package:
        raise ServiceDataError("package_not_found", "未找到该服务套餐。")
    return profile, package


async def list_available_technicians(
    *,
    longitude: float,
    latitude: float,
    max_distance_meters: float | None = None,
    query: str = "",
    page: int = 1,
    page_size: int = 10,
) -> tuple[list[dict[str, Any]], int]:
    lon, lat = float(longitude), float(latitude)
    if not -180 <= lon <= 180 or not -90 <= lat <= 90:
        raise ServiceDataError("invalid_coordinates", "位置坐标无效。")
    filters: dict[str, Any] = {
        "application_status": "approved",
        "listed": True,
        "username": {"$nin": [None, ""]},
        "service_profile.is_complete": True,
        "service_profile.accepting_requests": True,
    }
    if query:
        pattern = re.compile(re.escape(query.lstrip("@")), re.IGNORECASE)
        filters["$or"] = [
            {"username": pattern},
            {"display_name": pattern},
            {"service_profile.tags": pattern},
            {"service_profile.packages.category": pattern},
        ]
    active_members = {
        int(item["user_id"])
        async for item in membershipsdb.find({"active": True}, {"user_id": 1})
    }
    profiles = {
        int(item["user_id"]): item
        async for item in profilesdb.find(filters)
        if int(item["user_id"]) in active_members
    }
    values: list[dict[str, Any]] = []
    if profiles:
        async for location in locationsdb.find({"user_id": {"$in": list(profiles)}}):
            point = location.get("point", {}).get("coordinates") or [
                location.get("longitude"),
                location.get("latitude"),
            ]
            if len(point) != 2 or point[0] is None or point[1] is None:
                continue
            distance = _distance_meters(lon, lat, float(point[0]), float(point[1]))
            if max_distance_meters is not None and distance > float(max_distance_meters):
                continue
            profile = profiles[int(location["user_id"])]
            service_profile = profile.get("service_profile") or {}
            values.append(
                {
                    "user_id": int(profile["user_id"]),
                    "username": profile.get("username"),
                    "display_name": profile.get("display_name"),
                    "headline": service_profile.get("headline"),
                    "bio": service_profile.get("bio"),
                    "tags": service_profile.get("tags", []),
                    "public_area_text": service_profile.get("public_area_text"),
                    "service_modes": service_profile.get("service_modes", []),
                    "packages": service_profile.get("packages", []),
                    "distance_meters": round(distance, 2),
                    "distance_band": distance_band(distance),
                }
            )
    values.sort(key=lambda item: (item["distance_meters"], item["user_id"]))
    total = len(values)
    start = (max(1, page) - 1) * max(1, page_size)
    return values[start : start + max(1, page_size)], total


async def create_service_order(
    *,
    customer: Any,
    technician_id: int,
    package_id: str,
    service_mode: str,
    requirements: str,
    longitude: float | None = None,
    latitude: float | None = None,
    address_text: str = "",
) -> dict[str, Any]:
    await ensure_service_indexes()
    await observe_customer(customer)
    await require_customer_allowed(int(customer.id))
    if int(customer.id) == int(technician_id):
        raise ServiceDataError("self_service_not_allowed", "不能向自己发起服务请求。")
    personal_block = await blocksdb.find_one({"scope": "technician", "technician_id": int(technician_id), "customer_id": int(customer.id), "active": True})
    if personal_block:
        raise ServiceDataError("customer_blocked", "该技师暂不接受你的服务请求。")
    service_settings = await get_service_settings()
    max_open = service_settings["customer_max_open_orders"]
    open_count = await ordersdb.count_documents({"customer_id": int(customer.id), "status": {"$in": list(ORDER_ACTIVE_STATUSES)}})
    if open_count >= max_open:
        raise ServiceDataError("too_many_open_orders", f"最多同时保留 {max_open} 个未关闭服务单。")
    day_start = utc_now().replace(hour=0, minute=0, second=0, microsecond=0)
    daily_limit = service_settings["customer_daily_request_limit"]
    if await ordersdb.count_documents({"customer_id": int(customer.id), "created_at": {"$gte": day_start}}) >= daily_limit:
        raise ServiceDataError("daily_request_limit", "今天发起的服务请求已达到上限。")
    profile, package = await _get_package(int(technician_id), str(package_id))
    if service_mode not in package["service_modes"]:
        raise ServiceDataError("service_mode_unavailable", "该套餐不支持所选服务方式。")
    technician_location = await locationsdb.find_one({"user_id": int(technician_id)})
    if not technician_location:
        raise ServiceDataError("technician_location_required", "技师尚未配置服务位置。")
    address_payload: dict[str, Any] | None = None
    distance = 0.0
    if service_mode == "onsite":
        if longitude is None or latitude is None:
            raise ServiceDataError("customer_location_required", "上门服务必须提供位置。")
        lon, lat = float(longitude), float(latitude)
        if not -180 <= lon <= 180 or not -90 <= lat <= 90:
            raise ServiceDataError("invalid_coordinates", "位置坐标无效。")
        address = _clean_text(address_text, max_length=300, required=True)
        point = technician_location.get("point", {}).get("coordinates") or [technician_location.get("longitude"), technician_location.get("latitude")]
        distance = _distance_meters(float(point[0]), float(point[1]), lon, lat)
        radius = float(package.get("service_radius_km") or 0)
        if radius and distance > radius * 1000:
            raise ServiceDataError("outside_service_radius", "顾客位置超出该套餐的上门服务范围。")
        address_payload = {"kind": "customer", "longitude": lon, "latitude": lat, "address_text": address}
    else:
        if longitude is None or latitude is None:
            raise ServiceDataError(
                "customer_location_required", "到店服务必须先通过附近查找提供位置。"
            )
        lon, lat = float(longitude), float(latitude)
        if not -180 <= lon <= 180 or not -90 <= lat <= 90:
            raise ServiceDataError("invalid_coordinates", "位置坐标无效。")
        point = technician_location.get("point", {}).get("coordinates") or [
            technician_location.get("longitude"),
            technician_location.get("latitude"),
        ]
        distance = _distance_meters(float(point[0]), float(point[1]), lon, lat)
        venue = (profile.get("service_profile") or {}).get("venue") or {}
        address_payload = {
            "kind": "venue",
            "longitude": technician_location.get("longitude"),
            "latitude": technician_location.get("latitude"),
            "address_text": _clean_text(venue.get("address_hint"), max_length=300, required=True),
        }
    now = utc_now()
    order_id = uuid4().hex
    order = {
        "order_id": order_id,
        "customer_id": int(customer.id),
        "customer_name": _clean_text(getattr(customer, "first_name", ""), max_length=80) or f"用户 {customer.id}",
        "technician_id": int(technician_id),
        "technician_name": profile.get("display_name") or f"技师 {technician_id}",
        "package_id": str(package_id),
        "package_snapshot": package,
        "category": package["category"],
        "service_mode": service_mode,
        "requirements": _clean_text(requirements, max_length=800, required=True),
        "distance_meters": round(distance, 2),
        "distance_band": distance_band(distance),
        "status": "requested",
        "version": 1,
        "created_at": now,
        "updated_at": now,
    }
    encrypted_address = _encrypt_address(address_payload)
    await ordersdb.insert_one(order)
    try:
        await addressesdb.insert_one(
            {
                "order_id": order_id,
                "encrypted_payload": encrypted_address,
                "redacted": False,
                "redact_after": None,
                "created_at": now,
                "updated_at": now,
            }
        )
    except Exception:
        await ordersdb.delete_one({"order_id": order_id, "status": "requested"})
        raise
    await record_service_event(order_id, "order_requested", actor_id=int(customer.id))
    return order


def normalize_quote(value: dict[str, Any], *, package: dict[str, Any]) -> dict[str, Any]:
    currency = str(value.get("currency") or package.get("currency") or "CNY").upper()
    if currency != str(package.get("currency") or currency):
        raise ServiceDataError("currency_mismatch", "最终报价币种必须与套餐一致。")
    base = _positive_decimal(value.get("base_amount"), "服务金额")
    travel = _positive_decimal(value.get("travel_fee"), "交通费")
    discount = _positive_decimal(value.get("discount"), "优惠金额")
    addons = []
    addon_total = Decimal("0")
    for item in value.get("addons", []) or []:
        quantity = max(1, min(999, int(item.get("quantity") or 1)))
        unit_price = Decimal(_positive_decimal(item.get("unit_price"), "加项单价"))
        addons.append({"name": _clean_text(item.get("name"), max_length=60, required=True), "quantity": quantity, "unit_price": format(unit_price, "f")})
        addon_total += unit_price * quantity
    total = Decimal(base) + Decimal(travel) + addon_total - Decimal(discount)
    if total < 0:
        raise ServiceDataError("invalid_total", "最终报价总额不能小于 0。")
    provided = value.get("total_amount")
    if provided not in (None, "") and Decimal(_positive_decimal(provided, "总价")) != total:
        raise ServiceDataError("quote_total_mismatch", "报价明细与总价不一致。")
    return {
        "currency": currency,
        "base_amount": base,
        "travel_fee": travel,
        "addons": addons,
        "discount": discount,
        "total_amount": format(total.quantize(Decimal("0.01")), "f"),
        "note": _clean_text(value.get("note"), max_length=500),
    }


async def submit_service_quote(order_id: str, technician_id: int, values: dict[str, Any]) -> tuple[dict[str, Any], dict[str, Any]]:
    await ensure_service_indexes()
    order = await ordersdb.find_one({"order_id": str(order_id)})
    if not order or int(order["technician_id"]) != int(technician_id):
        raise ServiceDataError("order_not_found", "未找到可报价服务单。")
    if order["status"] not in {"requested", "quoted"}:
        raise ServiceDataError("invalid_order_state", "当前服务单不能修改报价。")
    quote = normalize_quote(values, package=order["package_snapshot"])
    version = int(order.get("quote_version") or 0) + 1
    quote.update({"quote_id": uuid4().hex, "order_id": str(order_id), "version": version, "created_by": int(technician_id), "created_at": utc_now()})
    try:
        await quotesdb.insert_one(quote)
    except DuplicateKeyError as exc:
        raise ServiceDataError(
            "concurrent_order_update", "服务单状态已变化，请刷新后重试。"
        ) from exc
    updated = await ordersdb.find_one_and_update(
        {
            "order_id": str(order_id),
            "status": {"$in": ["requested", "quoted"]},
            "version": order["version"],
        },
        {
            "$set": {
                "status": "quoted",
                "current_quote_id": quote["quote_id"],
                "quote_snapshot": quote,
                "quote_version": version,
                "updated_at": utc_now(),
            },
            "$inc": {"version": 1},
        },
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        await quotesdb.delete_one({"quote_id": quote["quote_id"]})
        raise ServiceDataError("concurrent_order_update", "服务单状态已变化，请刷新后重试。")
    await record_service_event(order_id, "quote_submitted", actor_id=int(technician_id), metadata={"quote_id": quote["quote_id"], "version": version})
    return updated, quote


async def confirm_service_quote(order_id: str, customer_id: int) -> dict[str, Any]:
    order = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "customer_id": int(customer_id), "status": "quoted"},
        {"$set": {"status": "confirmed", "confirmed_at": utc_now(), "updated_at": utc_now()}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        raise ServiceDataError("invalid_order_state", "当前报价无法确认。")
    await record_service_event(order_id, "quote_confirmed", actor_id=int(customer_id))
    return order


async def reject_service_order(order_id: str, technician_id: int, reason: str) -> dict[str, Any]:
    now = utc_now()
    order = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "technician_id": int(technician_id), "status": {"$in": ["requested", "quoted"]}},
        {"$set": {"status": "rejected", "closed_at": now, "updated_at": now, "close_reason": _clean_text(reason, max_length=500, required=True)}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        raise ServiceDataError("invalid_order_state", "当前服务单无法拒绝。")
    await _schedule_address_redaction(order_id, now)
    await record_service_event(order_id, "order_rejected", actor_id=int(technician_id), reason=reason)
    return order


async def start_service_order(order_id: str, technician_id: int) -> dict[str, Any]:
    order = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "technician_id": int(technician_id), "status": "confirmed"},
        {"$set": {"status": "in_progress", "started_at": utc_now(), "updated_at": utc_now()}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        raise ServiceDataError("invalid_order_state", "只有已确认服务单可以开始。")
    await record_service_event(order_id, "service_started", actor_id=int(technician_id))
    return order


async def cancel_service_order(order_id: str, actor_id: int, reason: str) -> dict[str, Any]:
    order = await ordersdb.find_one({"order_id": str(order_id)})
    if not order or int(actor_id) not in {int(order["customer_id"]), int(order["technician_id"])}:
        raise ServiceDataError("order_not_found", "未找到该服务单。")
    if order["status"] not in ORDER_ACTIVE_STATUSES - {"disputed"}:
        raise ServiceDataError("invalid_order_state", "当前服务单不能取消。")
    status = "canceled_customer" if int(actor_id) == int(order["customer_id"]) else "canceled_technician"
    now = utc_now()
    updated = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "status": order["status"], "version": order["version"]},
        {"$set": {"status": status, "closed_at": now, "updated_at": now, "close_reason": _clean_text(reason, max_length=500, required=True)}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        raise ServiceDataError("concurrent_order_update", "服务单状态已变化，请刷新后重试。")
    await _schedule_address_redaction(order_id, now)
    await qrdb.update_many({"order_id": str(order_id), "status": "issued"}, {"$set": {"status": "revoked", "revoked_at": now, "revoke_reason": "服务单已取消"}})
    await record_service_event(order_id, "order_canceled", actor_id=int(actor_id), reason=reason, metadata={"status": status})
    return updated


async def dispute_service_order(order_id: str, actor_id: int, reason: str) -> dict[str, Any]:
    current = await ordersdb.find_one(
        {
            "order_id": str(order_id),
            "status": {"$in": list(ORDER_ACTIVE_STATUSES - {"disputed"})},
            "$or": [{"customer_id": int(actor_id)}, {"technician_id": int(actor_id)}],
        }
    )
    if not current:
        raise ServiceDataError("invalid_order_state", "当前服务单不能发起争议。")
    order = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "status": current["status"], "version": current["version"]},
        {"$set": {"status": "disputed", "status_before_dispute": current["status"], "dispute_reason": _clean_text(reason, max_length=500, required=True), "updated_at": utc_now()}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        raise ServiceDataError("invalid_order_state", "当前服务单不能发起争议。")
    await qrdb.update_many({"order_id": str(order_id), "status": "issued"}, {"$set": {"status": "revoked", "revoked_at": utc_now(), "revoke_reason": "服务单争议"}})
    await record_service_event(order_id, "order_disputed", actor_id=int(actor_id), reason=reason)
    return order


async def resolve_service_dispute(
    order_id: str,
    *,
    actor_id: str,
    action: str,
    reason: str,
) -> dict[str, Any]:
    if action == "void":
        return await admin_void_service_order(order_id, actor_id=actor_id, reason=reason)
    if action != "resume":
        raise ServiceDataError("invalid_dispute_action", "不支持该争议处理操作。")
    current = await ordersdb.find_one({"order_id": str(order_id), "status": "disputed"})
    if not current:
        raise ServiceDataError("invalid_order_state", "该服务单当前不在争议中。")
    resume_status = str(current.get("status_before_dispute") or "confirmed")
    if resume_status == "completion_pending":
        resume_status = "in_progress"
    if resume_status not in {"requested", "quoted", "confirmed", "in_progress"}:
        resume_status = "confirmed"
    updated = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "status": "disputed", "version": current["version"]},
        {
            "$set": {
                "status": resume_status,
                "dispute_resolved_at": utc_now(),
                "dispute_resolution_reason": _clean_text(reason, max_length=500, required=True),
                "updated_at": utc_now(),
            },
            "$unset": {"status_before_dispute": ""},
            "$inc": {"version": 1},
        },
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        raise ServiceDataError("concurrent_order_update", "服务单状态已变化，请刷新后重试。")
    await record_service_event(order_id, "dispute_resolved", actor_id=actor_id, reason=reason, metadata={"status": resume_status})
    return updated


async def admin_void_service_order(order_id: str, *, actor_id: str, reason: str) -> dict[str, Any]:
    now = utc_now()
    order = await ordersdb.find_one_and_update(
        {"order_id": str(order_id), "status": {"$ne": "voided"}},
        {"$set": {"status": "voided", "closed_at": now, "updated_at": now, "close_reason": _clean_text(reason, max_length=500, required=True)}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        raise ServiceDataError("order_not_found", "未找到可作废服务单。")
    await _schedule_address_redaction(order_id, now)
    await qrdb.update_many({"order_id": str(order_id), "status": {"$ne": "voided"}}, {"$set": {"status": "voided", "revoked_at": now}})
    await reviewsdb.update_many({"order_id": str(order_id), "status": "approved"}, {"$set": {"status": "voided", "moderated_at": now, "moderation_reason": reason, "updated_at": now}})
    await recompute_review_stats()
    await record_service_event(order_id, "order_voided", actor_id=actor_id, reason=reason)
    return order


async def issue_review_qr(order_id: str, technician_id: int) -> tuple[dict[str, Any], str]:
    await ensure_service_indexes()
    order = await ordersdb.find_one({"order_id": str(order_id), "technician_id": int(technician_id)})
    if order and order.get("status") == "completion_pending":
        previous = await qrdb.find_one(
            {"order_id": str(order_id), "status": "issued"},
            sort=[("created_at", DESCENDING)],
        )
        if previous and _as_utc(previous["expires_at"]) <= utc_now():
            now = utc_now()
            expired = await qrdb.find_one_and_update(
                {"qr_id": previous["qr_id"], "status": "issued"},
                {"$set": {"status": "expired", "expired_at": now}},
                return_document=ReturnDocument.AFTER,
            )
            if expired:
                await ordersdb.update_one(
                    {
                        "order_id": str(order_id),
                        "status": "completion_pending",
                        "current_review_qr_id": previous["qr_id"],
                    },
                    {
                        "$set": {"status": "in_progress", "updated_at": now},
                        "$unset": {"current_review_qr_id": ""},
                        "$inc": {"version": 1},
                    },
                )
            order = await ordersdb.find_one(
                {"order_id": str(order_id), "technician_id": int(technician_id)}
            )
    if not order or order.get("status") != "in_progress":
        raise ServiceDataError("invalid_order_state", "只有服务中的订单可以生成评价二维码。")
    if await qrdb.find_one({"order_id": str(order_id), "status": {"$in": ["issued", "claimed"]}}):
        raise ServiceDataError("review_qr_exists", "该服务单已经生成评价二维码。")
    token = token_urlsafe(18)
    now = utc_now()
    hours = (await get_service_settings())["review_qr_expiry_hours"]
    document = {
        "qr_id": uuid4().hex,
        "order_id": str(order_id),
        "technician_id": int(technician_id),
        "customer_id": int(order["customer_id"]),
        "package_snapshot": order["package_snapshot"],
        "quote_snapshot": order.get("quote_snapshot"),
        "token_hash": hashlib.sha256(token.encode()).hexdigest(),
        "status": "issued",
        "expires_at": now + timedelta(hours=hours),
        "created_at": now,
    }
    try:
        await qrdb.insert_one(document)
    except DuplicateKeyError as exc:
        raise ServiceDataError("review_qr_exists", "该服务单已经生成评价二维码。") from exc
    updated = await ordersdb.find_one_and_update(
        {
            "order_id": str(order_id),
            "status": "in_progress",
            "version": order["version"],
        },
        {
            "$set": {
                "status": "completion_pending",
                "current_review_qr_id": document["qr_id"],
                "completion_requested_at": now,
                "updated_at": now,
            },
            "$inc": {"version": 1},
        },
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        await qrdb.update_one(
            {"qr_id": document["qr_id"], "status": "issued"},
            {
                "$set": {
                    "status": "voided",
                    "revoked_at": utc_now(),
                    "revoke_reason": "服务单状态已变化",
                }
            },
        )
        raise ServiceDataError("concurrent_order_update", "服务单状态已变化，请刷新后重试。")
    await record_service_event(order_id, "review_qr_issued", actor_id=int(technician_id), metadata={"qr_id": document["qr_id"]})
    return document, token


async def preview_review_qr(token: str, customer_id: int) -> dict[str, Any]:
    document = await qrdb.find_one({"token_hash": hashlib.sha256(str(token).encode()).hexdigest()})
    if not document:
        raise ServiceDataError("review_qr_unavailable", "评价二维码无效、已使用或已过期。")
    if int(document["customer_id"]) != int(customer_id):
        raise ServiceDataError("review_qr_customer_mismatch", "该二维码不属于当前顾客。")
    if document.get("status") == "claimed":
        if await reviewsdb.find_one({"qr_id": document["qr_id"]}):
            raise ServiceDataError("review_qr_unavailable", "评价二维码无效、已使用或已过期。")
        return document
    if document.get("status") != "issued":
        raise ServiceDataError("review_qr_unavailable", "评价二维码无效、已使用或已过期。")
    if _as_utc(document["expires_at"]) <= utc_now():
        now = utc_now()
        expired = await qrdb.find_one_and_update(
            {"qr_id": document["qr_id"], "status": "issued"},
            {"$set": {"status": "expired", "expired_at": now}},
            return_document=ReturnDocument.AFTER,
        )
        if expired:
            await ordersdb.update_one(
                {
                    "order_id": document["order_id"],
                    "status": "completion_pending",
                    "current_review_qr_id": document["qr_id"],
                },
                {
                    "$set": {"status": "in_progress", "updated_at": now},
                    "$unset": {"current_review_qr_id": ""},
                    "$inc": {"version": 1},
                },
            )
        raise ServiceDataError("review_qr_unavailable", "评价二维码无效、已使用或已过期。")
    return document


async def claim_review_qr(token: str, customer_id: int) -> tuple[dict[str, Any], dict[str, Any]]:
    token_hash = hashlib.sha256(str(token).encode()).hexdigest()
    now = utc_now()
    await preview_review_qr(token, customer_id)
    document = await qrdb.find_one_and_update(
        {"token_hash": token_hash, "customer_id": int(customer_id), "status": "issued"},
        {"$set": {"status": "claimed", "claimed_at": now}},
        return_document=ReturnDocument.AFTER,
    )
    if not document:
        raise ServiceDataError("review_qr_unavailable", "评价二维码无效、已使用或已过期。")
    order = await ordersdb.find_one_and_update(
        {"order_id": document["order_id"], "status": "completion_pending", "customer_id": int(customer_id)},
        {"$set": {"status": "completed", "completed_at": now, "closed_at": now, "updated_at": now}, "$inc": {"version": 1}},
        return_document=ReturnDocument.AFTER,
    )
    if not order:
        await qrdb.update_one({"qr_id": document["qr_id"]}, {"$set": {"status": "voided"}})
        raise ServiceDataError("invalid_order_state", "服务单状态已变化，无法完成评价。")
    await _schedule_address_redaction(order["order_id"], now)
    await record_service_event(order["order_id"], "service_completed", actor_id=int(customer_id), metadata={"qr_id": document["qr_id"]})
    return document, order


def normalize_review_template(values: dict[str, Any]) -> dict[str, Any]:
    ratings = []
    for item in values.get("rating_questions", []):
        if len(ratings) >= 5:
            raise ServiceDataError("too_many_review_questions", "评分维度最多 5 个。")
        weight = int(item.get("weight") or 0)
        if weight <= 0:
            raise ServiceDataError("invalid_review_weight", "评分权重必须大于 0。")
        ratings.append({"question_id": str(item.get("question_id") or uuid4().hex[:12]), "label": _clean_text(item.get("label"), max_length=40, required=True), "description": _clean_text(item.get("description"), max_length=160), "required": bool(item.get("required", True)), "weight": weight})
    if not ratings or sum(item["weight"] for item in ratings) != 100:
        raise ServiceDataError("invalid_review_weight", "评分维度权重合计必须为 100%。")
    texts = []
    for item in values.get("text_questions", []):
        if len(texts) >= 2:
            raise ServiceDataError("too_many_review_questions", "文字问题最多 2 个。")
        texts.append({"question_id": str(item.get("question_id") or uuid4().hex[:12]), "label": _clean_text(item.get("label"), max_length=40, required=True), "description": _clean_text(item.get("description"), max_length=160), "required": bool(item.get("required")), "max_length": max(50, min(1000, int(item.get("max_length") or 500)))})
    return {"rating_questions": ratings, "text_questions": texts}


async def get_active_review_template() -> dict[str, Any]:
    await ensure_service_indexes()
    current = await reviewtemplatesdb.find_one({"status": "active"}, sort=[("version", DESCENDING)])
    if current:
        return current
    now = utc_now()
    document = {"template_id": uuid4().hex, "version": 1, "status": "active", **normalize_review_template(DEFAULT_REVIEW_TEMPLATE), "created_at": now, "published_at": now}
    try:
        await reviewtemplatesdb.insert_one(document)
    except DuplicateKeyError:
        return await reviewtemplatesdb.find_one({"status": "active"}, sort=[("version", DESCENDING)]) or document
    return document


async def publish_review_template(values: dict[str, Any], *, actor_id: str) -> dict[str, Any]:
    normalized = normalize_review_template(values)
    await ensure_service_indexes()
    while True:
        current = await reviewtemplatesdb.find_one(sort=[("version", DESCENDING)])
        version = int((current or {}).get("version") or 0) + 1
        now = utc_now()
        document = {
            "template_id": uuid4().hex,
            "version": version,
            "status": "active",
            **normalized,
            "published_by": str(actor_id),
            "created_at": now,
            "published_at": now,
        }
        try:
            await reviewtemplatesdb.insert_one(document)
            break
        except DuplicateKeyError:
            continue
    await reviewtemplatesdb.update_many(
        {"status": "active", "template_id": {"$ne": document["template_id"]}},
        {"$set": {"status": "retired", "retired_at": now}},
    )
    return document


async def begin_review_draft(
    *,
    customer_id: int,
    technician_id: int,
    source: str,
    template: dict[str, Any],
    package_id: str | None = None,
    qr_id: str | None = None,
) -> dict[str, Any]:
    await ensure_service_indexes()
    now = utc_now()
    current = await reviewdraftsdb.find_one({"customer_id": int(customer_id)})
    identity = {
        "technician_id": int(technician_id),
        "source": str(source),
        "package_id": str(package_id) if package_id else None,
        "qr_id": str(qr_id) if qr_id else None,
    }
    if (
        current
        and all(current.get(key) == value for key, value in identity.items())
        and _as_utc(current["expires_at"]) > now
    ):
        return current
    document = {
        "draft_id": uuid4().hex,
        "customer_id": int(customer_id),
        **identity,
        "template_snapshot": {
            key: template[key]
            for key in (
                "template_id",
                "version",
                "rating_questions",
                "text_questions",
            )
        },
        "rating_index": 0,
        "text_index": 0,
        "answers": {},
        "created_at": now,
        "updated_at": now,
        "expires_at": now + timedelta(days=30),
    }
    await reviewdraftsdb.update_one(
        {"customer_id": int(customer_id)}, {"$set": document}, upsert=True
    )
    return document


async def save_review_draft_progress(
    customer_id: int,
    *,
    answers: dict[str, Any],
    rating_index: int,
    text_index: int,
) -> None:
    await reviewdraftsdb.update_one(
        {"customer_id": int(customer_id)},
        {
            "$set": {
                "answers": dict(answers),
                "rating_index": max(0, int(rating_index)),
                "text_index": max(0, int(text_index)),
                "updated_at": utc_now(),
            }
        },
    )


async def delete_review_draft(customer_id: int) -> None:
    await reviewdraftsdb.delete_one({"customer_id": int(customer_id)})


def _score_review(template: dict[str, Any], answers: dict[str, Any]) -> tuple[float, dict[str, int], dict[str, str]]:
    ratings: dict[str, int] = {}
    texts: dict[str, str] = {}
    total = 0.0
    for question in template["rating_questions"]:
        raw = answers.get(question["question_id"])
        if raw in (None, "") and not question["required"]:
            continue
        try:
            score = int(raw)
        except (TypeError, ValueError) as exc:
            raise ServiceDataError("invalid_review_answer", "评分必须是 1 到 5 的整数。") from exc
        if not 1 <= score <= 5:
            raise ServiceDataError("invalid_review_answer", "评分必须在 1 到 5 之间。")
        ratings[question["question_id"]] = score
        total += score * question["weight"] / 100
    for question in template["text_questions"]:
        text = _clean_text(answers.get(question["question_id"]), max_length=question["max_length"], required=question["required"])
        if text:
            texts[question["question_id"]] = text
    return round(total, 4), ratings, texts


async def submit_review(
    *,
    customer: Any,
    technician_id: int,
    source: str,
    answers: dict[str, Any],
    anonymous: bool,
    package_id: str | None = None,
    qr_id: str | None = None,
    template_snapshot: dict[str, Any] | None = None,
) -> dict[str, Any]:
    await observe_customer(customer)
    await require_customer_allowed(int(customer.id))
    if source not in REVIEW_SOURCES:
        raise ServiceDataError("invalid_review_source", "评价来源无效。")
    profile = await profilesdb.find_one({"user_id": int(technician_id), "application_status": "approved"})
    if not profile:
        raise ServiceDataError("technician_not_found", "未找到已认证技师。")
    if int(customer.id) == int(technician_id):
        raise ServiceDataError("self_review_not_allowed", "不能评价自己。")
    order_id = None
    package_snapshot = None
    if source == "qr_verified":
        qr = await qrdb.find_one({"qr_id": str(qr_id), "status": "claimed", "customer_id": int(customer.id), "technician_id": int(technician_id)})
        if not qr:
            raise ServiceDataError("review_qr_required", "缺少已完成服务单的评价资格。")
        if await reviewsdb.find_one({"qr_id": str(qr_id)}):
            raise ServiceDataError("review_already_submitted", "该服务单已经提交评价。")
        order_id = qr["order_id"]
        package_snapshot = qr["package_snapshot"]
    else:
        service_profile = profile.get("service_profile") or {}
        package_snapshot = next((item for item in service_profile.get("packages", []) if str(item.get("package_id")) == str(package_id)), None)
        if package_id and not package_snapshot:
            raise ServiceDataError("package_not_found", "未找到所选套餐。")
        package_snapshot = package_snapshot or {"package_id": None, "name": "其他服务", "category": "其他"}
    template = template_snapshot or await get_active_review_template()
    score, rating_answers, text_answers = _score_review(template, answers)
    normalized_content = "\n".join(
        value.casefold() for _, value in sorted(text_answers.items()) if value
    )
    now = utc_now()
    document = {
        "review_id": uuid4().hex,
        "technician_id": int(technician_id),
        "technician_name": profile.get("display_name") or f"技师 {technician_id}",
        "customer_id": int(customer.id),
        "customer_name": _clean_text(getattr(customer, "first_name", ""), max_length=80) or f"用户 {customer.id}",
        "source": source,
        "package_snapshot": package_snapshot,
        "category": package_snapshot.get("category") or "其他",
        "template_snapshot": {key: template[key] for key in ("template_id", "version", "rating_questions", "text_questions")},
        "rating_answers": rating_answers,
        "text_answers": text_answers,
        "content_fingerprint": (
            hashlib.sha256(normalized_content.encode()).hexdigest()
            if normalized_content
            else None
        ),
        "score": score,
        "anonymous": bool(anonymous),
        "status": "pending",
        "created_at": now,
        "updated_at": now,
    }
    if qr_id:
        document["qr_id"] = str(qr_id)
        document["order_id"] = order_id
    try:
        await reviewsdb.insert_one(document)
    except DuplicateKeyError as exc:
        if qr_id:
            raise ServiceDataError(
                "review_already_submitted", "该服务单已经提交评价。"
            ) from exc
        raise
    return document


async def moderate_review(review_id: str, action: str, *, actor_id: str, reason: str = "") -> dict[str, Any]:
    status_map = {"approve": "approved", "reject": "rejected", "void": "voided"}
    source_status = {"approve": "pending", "reject": "pending", "void": "approved"}
    if action not in status_map:
        raise ServiceDataError("invalid_review_action", "不支持该评价操作。")
    current = await reviewsdb.find_one({"review_id": str(review_id)})
    if not current:
        raise ServiceDataError("review_not_found", "未找到评价。")
    if current["status"] != source_status[action]:
        raise ServiceDataError("invalid_review_state", "当前评价状态不能执行该审核操作。")
    if action in {"reject", "void"} and not _clean_text(reason, max_length=500):
        raise ServiceDataError("reason_required", "拒绝或作废必须填写原因。")
    updated = await reviewsdb.find_one_and_update(
        {"review_id": str(review_id), "status": source_status[action]},
        {"$set": {"status": status_map[action], "moderated_by": str(actor_id), "moderated_at": utc_now(), "moderation_reason": _clean_text(reason, max_length=500), "updated_at": utc_now()}},
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        raise ServiceDataError("concurrent_review_update", "评价状态已变化，请刷新后重试。")
    await recompute_review_stats()
    return updated


async def recompute_review_stats() -> None:
    await ensure_service_indexes()
    approved = await reviewsdb.find({"status": "approved"}).to_list(length=100000)
    grouped: dict[tuple[int, str], list[dict[str, Any]]] = defaultdict(list)
    category_scores: dict[str, list[float]] = defaultdict(list)
    for review in approved:
        key = (int(review["technician_id"]), str(review.get("category") or "其他"))
        grouped[key].append(review)
        category_scores[key[1]].append(float(review["score"]))
    now = utc_now()
    await statsdb.delete_many({})
    documents = []
    for (technician_id, category), values in grouped.items():
        count = len(values)
        average = sum(float(item["score"]) for item in values) / count
        category_average = sum(category_scores[category]) / len(category_scores[category])
        rank_score = count / (count + 5) * average + 5 / (count + 5) * category_average
        dimensions: dict[str, list[int]] = defaultdict(list)
        for review in values:
            for key, score in review.get("rating_answers", {}).items():
                dimensions[key].append(int(score))
        documents.append(
            {
                "technician_id": technician_id,
                "category": category,
                "review_count": count,
                "average_score": round(average, 4),
                "category_average": round(category_average, 4),
                "rank_score": round(rank_score, 6),
                "eligible": count >= 3,
                "dimension_averages": {key: round(sum(items) / len(items), 4) for key, items in dimensions.items()},
                "last_review_at": max(item.get("moderated_at") or item["created_at"] for item in values),
                "updated_at": now,
            }
        )
    if documents:
        await statsdb.insert_many(documents)


async def list_leaderboard(*, category: str = "", page: int = 1, page_size: int = 20) -> tuple[list[dict[str, Any]], int]:
    await ensure_service_indexes()
    filters: dict[str, Any] = {"eligible": True}
    if category:
        filters["category"] = str(category)
    visible_ids = [
        int(item["user_id"])
        async for item in profilesdb.find(
            {
                "application_status": "approved",
                "listed": True,
                "username": {"$nin": [None, ""]},
            },
            {"user_id": 1},
        )
    ]
    filters["technician_id"] = {"$in": visible_ids}
    total = await statsdb.count_documents(filters)
    items = await statsdb.find(filters).sort([("rank_score", DESCENDING), ("review_count", DESCENDING), ("last_review_at", DESCENDING)]).skip((max(1, page) - 1) * page_size).limit(page_size).to_list(length=page_size)
    profiles = {int(item["user_id"]): item async for item in profilesdb.find({"user_id": {"$in": [item["technician_id"] for item in items]}, "application_status": "approved", "listed": True})}
    visible = [{**item, "display_name": profiles[item["technician_id"]].get("display_name"), "username": profiles[item["technician_id"]].get("username")} for item in items if item["technician_id"] in profiles]
    return visible, total


async def list_public_reviews(
    technician_id: int,
    *,
    page: int = 1,
    page_size: int = 10,
) -> tuple[list[dict[str, Any]], int]:
    filters = {"technician_id": int(technician_id), "status": "approved"}
    total = await reviewsdb.count_documents(filters)
    items = await reviewsdb.find(filters).sort("moderated_at", DESCENDING).skip(
        (max(1, page) - 1) * page_size
    ).limit(page_size).to_list(length=page_size)
    public_items = []
    for item in items:
        public_items.append(
            {
                "review_id": item["review_id"],
                "source": item["source"],
                "source_label": (
                    "完成服务单评价"
                    if item["source"] == "qr_verified"
                    else "用户主动评价"
                ),
                "customer_name": "匿名顾客" if item.get("anonymous", True) else item.get("customer_name"),
                "package_name": (item.get("package_snapshot") or {}).get("name"),
                "category": item.get("category"),
                "score": item.get("score"),
                "rating_answers": item.get("rating_answers", {}),
                "text_answers": item.get("text_answers", {}),
                "approved_at": item.get("moderated_at"),
            }
        )
    return public_items, total


async def get_technician_review_summary(technician_id: int) -> dict[str, Any]:
    items = await reviewsdb.find(
        {"technician_id": int(technician_id), "status": "approved"},
        {"score": 1, "source": 1},
    ).to_list(length=100000)
    count = len(items)
    return {
        "review_count": count,
        "average_score": round(
            sum(float(item["score"]) for item in items) / count,
            4,
        )
        if count
        else 0,
        "source_counts": {
            source: sum(1 for item in items if item.get("source") == source)
            for source in REVIEW_SOURCES
        },
        "ranking_title": "审核评价排行",
    }


async def list_service_orders(*, query: str = "", status: str = "", page: int = 1, page_size: int = 20) -> tuple[list[dict[str, Any]], int]:
    await ensure_service_indexes()
    filters: dict[str, Any] = {}
    if status:
        filters["status"] = status
    if query:
        if query.isdigit():
            filters["$or"] = [{"customer_id": int(query)}, {"technician_id": int(query)}]
        else:
            pattern = re.compile(re.escape(query), re.IGNORECASE)
            filters["$or"] = [{"order_id": pattern}, {"customer_name": pattern}, {"technician_name": pattern}]
    total = await ordersdb.count_documents(filters)
    items = await ordersdb.find(filters).sort("created_at", DESCENDING).skip((max(1, page) - 1) * page_size).limit(page_size).to_list(length=page_size)
    return items, total


async def list_actor_service_orders(
    actor_id: int,
    *,
    role: str = "all",
    page: int = 1,
    page_size: int = 20,
) -> tuple[list[dict[str, Any]], int]:
    if role == "customer":
        filters: dict[str, Any] = {"customer_id": int(actor_id)}
    elif role == "technician":
        filters = {"technician_id": int(actor_id)}
    else:
        filters = {
            "$or": [
                {"customer_id": int(actor_id)},
                {"technician_id": int(actor_id)},
            ]
        }
    total = await ordersdb.count_documents(filters)
    items = await ordersdb.find(filters).sort("created_at", DESCENDING).skip(
        (max(1, page) - 1) * page_size
    ).limit(page_size).to_list(length=page_size)
    return items, total


async def get_admin_service_order(order_id: str) -> dict[str, Any]:
    order = await ordersdb.find_one({"order_id": str(order_id)})
    if not order:
        raise ServiceDataError("order_not_found", "未找到服务单。")
    result = dict(order)
    result["quotes"] = await quotesdb.find({"order_id": str(order_id)}).sort(
        "version", ASCENDING
    ).to_list(length=100)
    result["events"] = await eventsdb.find({"order_id": str(order_id)}).sort(
        "created_at", ASCENDING
    ).to_list(length=500)
    result["qr_records"] = await qrdb.find({"order_id": str(order_id)}).sort(
        "created_at", DESCENDING
    ).to_list(length=100)
    return result


async def list_review_qr_records(
    *,
    status: str = "",
    query: str = "",
    page: int = 1,
    page_size: int = 20,
) -> tuple[list[dict[str, Any]], int]:
    filters: dict[str, Any] = {}
    if status:
        filters["status"] = status
    if query:
        filters["$or"] = [
            {"order_id": re.compile(re.escape(query), re.IGNORECASE)},
            {"qr_id": re.compile(re.escape(query), re.IGNORECASE)},
            {"customer_id": int(query) if query.isdigit() else -1},
            {"technician_id": int(query) if query.isdigit() else -1},
        ]
    total = await qrdb.count_documents(filters)
    items = await qrdb.find(filters).sort("created_at", DESCENDING).skip(
        (max(1, page) - 1) * page_size
    ).limit(page_size).to_list(length=page_size)
    for item in items:
        item.pop("token_hash", None)
    return items, total


async def list_reviews(*, status: str = "", source: str = "", query: str = "", page: int = 1, page_size: int = 20) -> tuple[list[dict[str, Any]], int]:
    await ensure_service_indexes()
    filters: dict[str, Any] = {}
    if status:
        filters["status"] = status
    if source:
        filters["source"] = source
    if query:
        pattern = re.compile(re.escape(query), re.IGNORECASE)
        filters["$or"] = [{"technician_name": pattern}, {"customer_name": pattern}, {"review_id": pattern}]
    total = await reviewsdb.count_documents(filters)
    items = await reviewsdb.find(filters).sort("created_at", DESCENDING).skip((max(1, page) - 1) * page_size).limit(page_size).to_list(length=page_size)
    for item in items:
        item["customer_review_count"] = await reviewsdb.count_documents({"customer_id": item["customer_id"], "technician_id": item["technician_id"]})
        item["customer_review_count_30d"] = await reviewsdb.count_documents({"customer_id": item["customer_id"], "technician_id": item["technician_id"], "created_at": {"$gte": utc_now() - timedelta(days=30)}})
        item["customer_review_count_90d"] = await reviewsdb.count_documents({"customer_id": item["customer_id"], "technician_id": item["technician_id"], "created_at": {"$gte": utc_now() - timedelta(days=90)}})
        item["similar_content_count"] = (
            await reviewsdb.count_documents(
                {
                    "customer_id": item["customer_id"],
                    "technician_id": item["technician_id"],
                    "content_fingerprint": item["content_fingerprint"],
                }
            )
            if item.get("content_fingerprint")
            else 0
        )
    return items, total


async def get_order_for_actor(order_id: str, actor_id: int, *, reveal_address: bool = False) -> dict[str, Any]:
    order = await ordersdb.find_one({"order_id": str(order_id)})
    if not order or int(actor_id) not in {int(order["customer_id"]), int(order["technician_id"])}:
        raise ServiceDataError("order_not_found", "未找到服务单。")
    result = dict(order)
    can_reveal = order["status"] in {"confirmed", "in_progress", "completion_pending", "completed", "disputed"}
    if reveal_address and can_reveal:
        address = await addressesdb.find_one({"order_id": str(order_id), "redacted": False})
        if address:
            result["exact_address"] = _decrypt_address(address["encrypted_payload"])
    return result


async def admin_reveal_order_address(order_id: str, *, actor_id: str, reason: str) -> dict[str, Any]:
    reason = _clean_text(reason, max_length=500, required=True)
    order = await ordersdb.find_one({"order_id": str(order_id)})
    address = await addressesdb.find_one({"order_id": str(order_id), "redacted": False})
    if not order or not address:
        raise ServiceDataError("address_unavailable", "精确地址已脱敏或不存在。")
    await record_service_event(order_id, "admin_address_revealed", actor_id=actor_id, reason=reason)
    return _decrypt_address(address["encrypted_payload"])


async def redact_expired_addresses() -> int:
    now = utc_now()
    candidates = await addressesdb.find({"redacted": False, "redact_after": {"$lte": now}}).to_list(length=1000)
    count = 0
    for item in candidates:
        order = await ordersdb.find_one({"order_id": item["order_id"]})
        if not order or order.get("status") not in ORDER_TERMINAL_STATUSES:
            continue
        result = await addressesdb.update_one({"_id": item["_id"], "redacted": False}, {"$set": {"redacted": True, "redacted_at": now, "updated_at": now}, "$unset": {"encrypted_payload": ""}})
        if result.modified_count:
            await ordersdb.update_one(
                {"order_id": item["order_id"]},
                {
                    "$set": {"address_redacted": True, "updated_at": now},
                    "$unset": {"distance_meters": ""},
                },
            )
        count += result.modified_count
    return count


async def set_customer_block(*, customer_id: int, scope: str, technician_id: int | None, active: bool, actor_id: int | str, reason: str) -> dict[str, Any]:
    if scope not in {"global", "technician"}:
        raise ServiceDataError("invalid_block_scope", "拉黑范围无效。")
    if scope == "technician" and technician_id is None:
        raise ServiceDataError("technician_required", "技师拉黑必须指定技师。")
    now = utc_now()
    await blocksdb.update_one(
        {"scope": scope, "technician_id": int(technician_id or 0), "customer_id": int(customer_id)},
        {"$set": {"active": bool(active), "reason": _clean_text(reason, max_length=500, required=active), "actor_id": actor_id, "updated_at": now}, "$setOnInsert": {"created_at": now}},
        upsert=True,
    )
    return await blocksdb.find_one({"scope": scope, "technician_id": int(technician_id or 0), "customer_id": int(customer_id)}) or {}


async def set_technician_customer_block(
    *,
    technician_id: int,
    customer_id: int,
    active: bool,
    reason: str,
) -> dict[str, Any]:
    profile = await profilesdb.find_one(
        {"user_id": int(technician_id), "application_status": "approved"}
    )
    if not profile:
        raise ServiceDataError("technician_required", "只有已认证技师可以管理个人拉黑。")
    if not await ordersdb.find_one(
        {"technician_id": int(technician_id), "customer_id": int(customer_id)}
    ):
        raise ServiceDataError("customer_relationship_required", "只能拉黑曾向你发起服务请求的顾客。")
    return await set_customer_block(
        customer_id=int(customer_id),
        scope="technician",
        technician_id=int(technician_id),
        active=active,
        actor_id=int(technician_id),
        reason=reason,
    )


async def list_customer_blocks(
    *,
    scope: str = "global",
    active: bool | None = None,
    page: int = 1,
    page_size: int = 20,
) -> tuple[list[dict[str, Any]], int]:
    filters: dict[str, Any] = {"scope": scope}
    if active is not None:
        filters["active"] = active
    total = await blocksdb.count_documents(filters)
    items = await blocksdb.find(filters).sort("updated_at", DESCENDING).skip(
        (max(1, page) - 1) * page_size
    ).limit(page_size).to_list(length=page_size)
    return items, total


async def create_service_report(*, reporter_id: int, target_type: str, target_id: str, reason: str) -> dict[str, Any]:
    if target_type not in {"technician", "customer", "order", "review"}:
        raise ServiceDataError("invalid_report_target", "举报对象无效。")
    document = {"report_id": uuid4().hex, "reporter_id": int(reporter_id), "target_type": target_type, "target_id": str(target_id), "reason": _clean_text(reason, max_length=800, required=True), "status": "open", "created_at": utc_now()}
    await reportsdb.insert_one(document)
    return document


async def list_service_reports(
    *,
    status: str = "",
    page: int = 1,
    page_size: int = 20,
) -> tuple[list[dict[str, Any]], int]:
    filters = {"status": status} if status else {}
    total = await reportsdb.count_documents(filters)
    items = await reportsdb.find(filters).sort("created_at", DESCENDING).skip(
        (max(1, page) - 1) * page_size
    ).limit(page_size).to_list(length=page_size)
    return items, total


async def moderate_service_report(
    report_id: str,
    *,
    action: str,
    actor_id: str,
    reason: str,
) -> dict[str, Any]:
    status_map = {"resolve": "resolved", "dismiss": "dismissed"}
    if action not in status_map:
        raise ServiceDataError("invalid_report_action", "不支持该举报操作。")
    updated = await reportsdb.find_one_and_update(
        {"report_id": str(report_id), "status": "open"},
        {
            "$set": {
                "status": status_map[action],
                "handled_by": str(actor_id),
                "handled_at": utc_now(),
                "handling_reason": _clean_text(reason, max_length=500, required=True),
            }
        },
        return_document=ReturnDocument.AFTER,
    )
    if not updated:
        raise ServiceDataError("report_not_found", "举报不存在或已处理。")
    return updated


async def fulfillment_metrics() -> dict[str, Any]:
    await ensure_service_indexes()
    counts = {status: await ordersdb.count_documents({"status": status}) for status in ORDER_STATUSES}
    valid_requests = sum(counts.values()) - counts["voided"]
    quoted = await ordersdb.count_documents(
        {"status": {"$ne": "voided"}, "current_quote_id": {"$exists": True}}
    )
    confirmed = await ordersdb.count_documents(
        {"status": {"$ne": "voided"}, "confirmed_at": {"$exists": True}}
    )
    completed = counts["completed"]
    canceled = counts["canceled_customer"] + counts["canceled_technician"]
    directory_views = await eventsdb.count_documents({"event_type": "directory_viewed"})
    technician_views = await eventsdb.count_documents({"event_type": "technician_viewed"})
    request_starts = await eventsdb.count_documents({"event_type": "request_started"})
    return {
        "counts": counts,
        "valid_requests": valid_requests,
        "quoted_requests": quoted,
        "confirmed_requests": confirmed,
        "directory_views": directory_views,
        "technician_views": technician_views,
        "request_starts": request_starts,
        "request_submission_rate": min(1.0, round(valid_requests / request_starts, 4))
        if request_starts
        else 0,
        "quote_rate": round(quoted / valid_requests, 4) if valid_requests else 0,
        "customer_confirmation_rate": round(confirmed / quoted, 4) if quoted else 0,
        "match_success_rate": round(confirmed / valid_requests, 4) if valid_requests else 0,
        "fulfillment_rate": round(completed / confirmed, 4) if confirmed else 0,
        "cancellation_rate": round(canceled / valid_requests, 4) if valid_requests else 0,
        "cancellation_distribution": {
            "customer": counts["canceled_customer"],
            "technician": counts["canceled_technician"],
        },
        "scope_note": "仅统计平台服务单；直接 Telegram 私聊成交不在统计范围。",
    }