from __future__ import annotations

from datetime import UTC, datetime, timedelta
from html import escape
from secrets import token_urlsafe
from typing import Any

from pyrogram import StopPropagation, filters
from pyrogram.enums import ChatMemberStatus, ParseMode
from pyrogram.types import (
    CallbackQuery,
    ChatMemberUpdated,
    InlineKeyboardButton,
    InlineKeyboardMarkup,
    KeyboardButton,
    Message,
    ReplyKeyboardMarkup,
)

from wbb import BOT_USERNAME, app, log
from wbb.services.directory import (
    DirectoryServiceError,
    admin_change_teacher_state,
    admin_decide_teacher,
    apply_as_teacher,
    change_own_teacher_state,
    clear_user_location,
    directory_for_user,
    format_distance,
    observe_directory_user,
    observe_group_member,
    profile_summary,
    public_teacher,
    require_platform_membership,
    start_presence_sweeper,
    status_value,
    update_user_geocode_consent,
    update_user_location,
    verify_platform_membership,
)
from wbb.services.directory_geocoding import (
    NOMINATIM_ATTRIBUTION,
    NOMINATIM_ATTRIBUTION_URL,
)
from wbb.utils.dbdirectory import (
    APPLICATION_APPROVED,
    APPLICATION_PENDING,
    APPLICATION_REJECTED,
    APPLICATION_REVOKED,
    get_directory_location,
    get_directory_profile,
    list_directory_profiles,
    list_teacher_applications,
)

__MODULE__ = "师生与附近"
__HELP__ = """/directory - 打开师生服务菜单或在群内验证成员身份。
/nearby - 选择范围并查找附近老师。
/teacher_rank - 按距离查看全部上榜老师。
/teacher_apply - 申请成为老师。
/teacher_online - 老师上线。
/teacher_offline - 老师下线。
/teacher_list - 老师上榜。
/teacher_unlist - 老师下榜。"""

APPLICATION_LABELS = {
    "none": "学生",
    APPLICATION_PENDING: "老师申请待审批",
    APPLICATION_APPROVED: "老师",
    APPLICATION_REJECTED: "老师申请已拒绝",
    APPLICATION_REVOKED: "老师资格已撤销",
}
TEACHER_ACTION_LABELS = {
    "list": "上榜",
    "unlist": "下榜",
    "online": "上线",
    "offline": "下线",
}
BUTTON_NEARBY = "附近老师"
BUTTON_RANK = "老师榜单"
BUTTON_APPLY = "申请成为老师"
BUTTON_APPROVAL = "老师审批"
BUTTON_STATUS = "我的状态"
BUTTON_LIST = "上榜"
BUTTON_UNLIST = "下榜"
BUTTON_ONLINE = "上线"
BUTTON_OFFLINE = "下线"
BUTTON_PRIVACY = "位置隐私"
BUTTON_CLEAR_LOCATION = "清除位置"

_admin_flows: dict[int, dict[str, Any]] = {}
_admin_confirmations: dict[str, dict[str, Any]] = {}


def _display_name(profile: dict[str, Any]) -> str:
    return str(profile.get("display_name") or f"用户 {profile['user_id']}")


def _directory_keyboard(
    profile: dict[str, Any] | None,
    *,
    is_admin: bool,
) -> ReplyKeyboardMarkup:
    status = str((profile or {}).get("application_status") or "none")
    rows: list[list[KeyboardButton]] = [
        [KeyboardButton("更新位置", request_location=True)],
        [KeyboardButton(BUTTON_NEARBY), KeyboardButton(BUTTON_RANK)],
    ]
    if status == APPLICATION_APPROVED:
        rows.extend(
            [
                [
                    KeyboardButton(
                        BUTTON_UNLIST if profile and profile.get("listed") else BUTTON_LIST
                    ),
                    KeyboardButton(
                        BUTTON_OFFLINE
                        if profile and profile.get("online")
                        else BUTTON_ONLINE
                    ),
                ],
                [KeyboardButton(BUTTON_STATUS)],
            ]
        )
    else:
        rows.append([KeyboardButton(BUTTON_APPLY), KeyboardButton(BUTTON_STATUS)])
    rows.append([KeyboardButton(BUTTON_PRIVACY), KeyboardButton(BUTTON_CLEAR_LOCATION)])
    if is_admin:
        rows.append([KeyboardButton(BUTTON_APPROVAL)])
    return ReplyKeyboardMarkup(
        rows,
        resize_keyboard=True,
        is_persistent=True,
        selective=True,
        placeholder="选择师生服务或输入消息",
    )


async def send_directory_menu(message: Message) -> None:
    if not message.from_user:
        return
    try:
        await require_platform_membership(int(message.from_user.id))
    except DirectoryServiceError as exc:
        await message.reply_text(str(exc))
        return
    profile = await observe_directory_user(message.from_user)
    location = await get_directory_location(int(message.from_user.id))
    admin_result = await verify_platform_membership(
        user_id=int(message.from_user.id),
        require_admin=True,
    )
    summary = profile_summary(profile, location)
    status_label = APPLICATION_LABELS.get(summary["application_status"], "学生")
    lines = [
        "<b>师生与附近</b>",
        f"身份：{escape(status_label)}",
        f"位置：{escape(summary['region'] or '尚未更新')}",
    ]
    if summary["application_status"] == APPLICATION_APPROVED:
        lines.extend(
            [
                f"榜单：{'已上榜' if summary['listed'] else '未上榜'}",
                f"状态：{'在线' if summary['online'] else '离线'}",
            ]
        )
    await message.reply_text(
        "\n".join(lines),
        parse_mode=ParseMode.HTML,
        reply_markup=_directory_keyboard(
            {**profile, "online": summary["online"]},
            is_admin=bool(admin_result.get("allowed")),
        ),
    )


async def _verify_group_member(message: Message) -> bool:
    if not message.from_user:
        return False
    try:
        member = await app.get_chat_member(message.chat.id, message.from_user.id)
    except Exception:
        await message.reply_text("暂时无法验证你的群成员身份，请稍后重试。")
        return False
    active = member.status in {
        ChatMemberStatus.OWNER,
        ChatMemberStatus.ADMINISTRATOR,
        ChatMemberStatus.MEMBER,
        ChatMemberStatus.RESTRICTED,
    }
    await observe_group_member(
        chat_id=message.chat.id,
        chat_title=message.chat.title or "",
        user=message.from_user,
        status=status_value(member.status),
        active=active,
        verified=True,
    )
    if not active:
        await message.reply_text("该功能仅对当前群成员开放。")
    return active


@app.on_message(filters.command("directory"))
async def directory_command(_, message: Message):
    if message.chat.type.value == "private":
        return await send_directory_menu(message)
    if not await _verify_group_member(message):
        return
    url = f"https://t.me/{BOT_USERNAME}?start=directory"
    await message.reply_text(
        "身份验证成功。请点击下方按钮在私聊中使用师生与附近功能。",
        reply_markup=InlineKeyboardMarkup(
            [[InlineKeyboardButton("打开师生服务", url=url)]]
        ),
    )


@app.on_message(filters.command("nearby") & filters.private)
async def nearby_command(_, message: Message):
    await _show_radius_picker(message)


@app.on_message(filters.command("teacher_rank") & filters.private)
async def teacher_rank_command(_, message: Message):
    await _show_teacher_results(message, radius_km=None, page=1)


@app.on_message(filters.command("teacher_apply") & filters.private)
async def teacher_apply_command(_, message: Message):
    await _apply_teacher(message)


async def _self_state_command(message: Message, action: str) -> None:
    if not message.from_user:
        return
    try:
        profile, _ = await change_own_teacher_state(
            user=message.from_user,
            action=action,
        )
        await message.reply_text(
            f"已{TEACHER_ACTION_LABELS[action]}。"
            + (
                "本次上线状态将在 24 小时后自动失效。"
                if action == "online"
                else ""
            )
        )
        await _refresh_keyboard(message, profile)
    except DirectoryServiceError as exc:
        await message.reply_text(str(exc))


@app.on_message(filters.command("teacher_online") & filters.private)
async def teacher_online_command(_, message: Message):
    await _self_state_command(message, "online")


@app.on_message(filters.command("teacher_offline") & filters.private)
async def teacher_offline_command(_, message: Message):
    await _self_state_command(message, "offline")


@app.on_message(filters.command("teacher_list") & filters.private)
async def teacher_list_command(_, message: Message):
    await _self_state_command(message, "list")


@app.on_message(filters.command("teacher_unlist") & filters.private)
async def teacher_unlist_command(_, message: Message):
    await _self_state_command(message, "unlist")


@app.on_message(filters.private & filters.location, group=12)
async def directory_location_message(_, message: Message):
    if not message.from_user or not message.location:
        return
    try:
        location, previous_consent = await update_user_location(
            user=message.from_user,
            longitude=message.location.longitude,
            latitude=message.location.latitude,
        )
    except DirectoryServiceError as exc:
        return await message.reply_text(str(exc))
    await message.reply_text("位置已更新，可立即使用附近老师和老师榜单。")
    if previous_consent is None:
        await message.reply_text(
            "是否同意将本次及以后更新的精确坐标发送给 "
            "OpenStreetMap Nominatim，仅用于解析省、市、区县？\n\n"
            "不会发送 Telegram 用户信息；选择“仅计算距离”后，附近功能仍可正常使用。",
            reply_markup=InlineKeyboardMarkup(
                [
                    [
                        InlineKeyboardButton(
                            "同意解析区域",
                            callback_data="dir:consent:yes",
                        ),
                        InlineKeyboardButton(
                            "仅计算距离",
                            callback_data="dir:consent:no",
                        ),
                    ]
                ]
            ),
        )
    elif previous_consent is True:
        await message.reply_text("区域解析已进入队列，完成前会显示“区域暂不可用”。")
    await _refresh_keyboard(message, await get_directory_profile(message.from_user.id))


async def _refresh_keyboard(
    message: Message,
    profile: dict[str, Any] | None,
) -> None:
    if not message.from_user:
        return
    admin_result = await verify_platform_membership(
        user_id=int(message.from_user.id),
        require_admin=True,
    )
    summary = profile_summary(
        profile or {"user_id": message.from_user.id},
        await get_directory_location(message.from_user.id),
    )
    await message.reply_text(
        "菜单已更新。",
        reply_markup=_directory_keyboard(
            {**(profile or {}), "online": summary["online"]},
            is_admin=bool(admin_result.get("allowed")),
        ),
    )


async def _apply_teacher(message: Message) -> None:
    if not message.from_user:
        return
    try:
        profile = await apply_as_teacher(user=message.from_user)
    except DirectoryServiceError as exc:
        return await message.reply_text(str(exc))
    await message.reply_text(
        "老师申请已提交，管理员审批后会通过申请来源机器人通知你。"
        if profile.get("application_status") == APPLICATION_PENDING
        else "当前申请状态未发生变化。"
    )
    await _refresh_keyboard(message, profile)


async def _show_status(message: Message) -> None:
    if not message.from_user:
        return
    profile = await observe_directory_user(message.from_user)
    summary = profile_summary(profile, await get_directory_location(message.from_user.id))
    lines = [
        "<b>我的师生状态</b>",
        f"身份：{escape(APPLICATION_LABELS.get(summary['application_status'], '学生'))}",
        f"位置：{escape(summary['region'] or '尚未更新')}",
    ]
    if summary["application_status"] == APPLICATION_APPROVED:
        lines.extend(
            [
                f"榜单：{'已上榜' if summary['listed'] else '未上榜'}",
                f"上下线：{'在线' if summary['online'] else '离线'}",
                (
                    "自动下线："
                    + escape(
                        summary["online_until"].astimezone(UTC).strftime(
                            "%Y-%m-%d %H:%M UTC"
                        )
                    )
                    if summary["online"] and summary["online_until"]
                    else ""
                ),
            ]
        )
    await message.reply_text(
        "\n".join(line for line in lines if line),
        parse_mode=ParseMode.HTML,
    )


async def _show_privacy(message: Message) -> None:
    if not message.from_user:
        return
    location = await get_directory_location(message.from_user.id)
    if not location:
        return await message.reply_text("尚未保存位置。")
    consent = location.get("geocode_consent")
    text = {
        True: "当前已同意将精确坐标发送给 Nominatim 解析行政区域。",
        False: "当前只在本系统保存位置并计算距离，不向地图服务发送坐标。",
        None: "尚未选择是否使用 Nominatim 解析行政区域。",
    }[consent]
    await message.reply_text(
        text
        + "\n关闭授权只影响后续请求；第三方已接收的历史请求无法撤回。",
        reply_markup=InlineKeyboardMarkup(
            [
                [
                    InlineKeyboardButton("同意区域解析", callback_data="dir:consent:yes"),
                    InlineKeyboardButton("关闭区域解析", callback_data="dir:consent:no"),
                ]
            ]
        ),
    )


async def _show_radius_picker(target: Message | CallbackQuery) -> None:
    markup = InlineKeyboardMarkup(
        [
            [
                InlineKeyboardButton(
                    f"{radius} 公里",
                    callback_data=f"dir:list:{radius}:1",
                )
                for radius in (5, 10)
            ],
            [
                InlineKeyboardButton(
                    f"{radius} 公里",
                    callback_data=f"dir:list:{radius}:1",
                )
                for radius in (20, 50)
            ],
        ]
    )
    if isinstance(target, CallbackQuery):
        await target.message.edit_text("请选择附近老师的搜索范围：", reply_markup=markup)
    else:
        await target.reply_text("请选择附近老师的搜索范围：", reply_markup=markup)


def _teacher_result_markup(
    teachers: list[dict[str, Any]],
    *,
    radius_key: str,
    page: int,
    total: int,
) -> InlineKeyboardMarkup:
    rows: list[list[InlineKeyboardButton]] = []
    for item in teachers:
        username = str(item.get("username") or "")
        label = f"{item['display_name']} (@{username})"
        rows.append(
            [
                InlineKeyboardButton(
                    label[:48],
                    url=f"https://t.me/{username}",
                )
            ]
        )
    navigation: list[InlineKeyboardButton] = []
    if page > 1:
        navigation.append(
            InlineKeyboardButton(
                "上一页",
                callback_data=f"dir:list:{radius_key}:{page - 1}",
            )
        )
    if page * 10 < total:
        navigation.append(
            InlineKeyboardButton(
                "下一页",
                callback_data=f"dir:list:{radius_key}:{page + 1}",
            )
        )
    if navigation:
        rows.append(navigation)
    rows.append([InlineKeyboardButton("切换附近范围", callback_data="dir:radius")])
    return InlineKeyboardMarkup(rows)


async def _show_teacher_results(
    target: Message | CallbackQuery,
    *,
    radius_km: int | None,
    page: int,
) -> None:
    user = target.from_user
    try:
        raw_items, total = await directory_for_user(
            user=user,
            radius_km=radius_km,
            page=page,
            page_size=10,
        )
    except DirectoryServiceError as exc:
        if isinstance(target, CallbackQuery):
            return await target.answer(str(exc), show_alert=True)
        return await target.reply_text(str(exc))
    teachers = [public_teacher(item) for item in raw_items]
    title = (
        f"<b>{radius_km} 公里内的老师</b>"
        if radius_km is not None
        else "<b>老师榜单</b>"
    )
    lines = [title, f"共 {total} 位已上榜老师，按距离排序。"]
    for index, item in enumerate(teachers, start=(page - 1) * 10 + 1):
        lines.append(
            f"\n{index}. <b>{escape(item['display_name'])}</b> "
            f"(@{escape(item['username'])})\n"
            f"状态：{'在线' if item['online'] else '离线'} | "
            f"距离：{format_distance(item['distance_meters'])} | "
            f"区域：{escape(item['region'])}"
        )
    if not teachers:
        lines.append("\n当前范围内没有已上榜老师。")
    lines.append(
        f'\n<a href="{NOMINATIM_ATTRIBUTION_URL}">{NOMINATIM_ATTRIBUTION}</a>'
    )
    markup = _teacher_result_markup(
        teachers,
        radius_key=str(radius_km) if radius_km is not None else "all",
        page=page,
        total=total,
    )
    if isinstance(target, CallbackQuery):
        await target.message.edit_text(
            "\n".join(lines),
            parse_mode=ParseMode.HTML,
            disable_web_page_preview=True,
            reply_markup=markup,
        )
        await target.answer()
    else:
        await target.reply_text(
            "\n".join(lines),
            parse_mode=ParseMode.HTML,
            disable_web_page_preview=True,
            reply_markup=markup,
        )


async def _show_admin_applications(
    target: Message | CallbackQuery,
    *,
    page: int = 1,
) -> None:
    try:
        await require_platform_membership(int(target.from_user.id), require_admin=True)
    except DirectoryServiceError as exc:
        if isinstance(target, CallbackQuery):
            return await target.answer(str(exc), show_alert=True)
        return await target.reply_text(str(exc))
    items, total = await list_teacher_applications(
        status=APPLICATION_PENDING,
        page=page,
        page_size=5,
    )
    lines = ["<b>老师申请审批</b>", f"待审批：{total}"]
    rows: list[list[InlineKeyboardButton]] = []
    for item in items:
        lines.append(
            f"\n{escape(_display_name(item))} (@{escape(item.get('username') or '')})"
            f"\n用户 ID：<code>{item['user_id']}</code>"
        )
        rows.append(
            [
                InlineKeyboardButton(
                    f"查看 {_display_name(item)[:18]}",
                    callback_data=f"dir:admin:detail:{item['user_id']}",
                )
            ]
        )
    if page > 1:
        rows.append(
            [
                InlineKeyboardButton(
                    "上一页",
                    callback_data=f"dir:admin:pending:{page - 1}",
                )
            ]
        )
    if page * 5 < total:
        rows.append(
            [
                InlineKeyboardButton(
                    "下一页",
                    callback_data=f"dir:admin:pending:{page + 1}",
                )
            ]
        )
    rows.append(
        [InlineKeyboardButton("已批准老师", callback_data="dir:admin:teachers:1")]
    )
    markup = InlineKeyboardMarkup(rows)
    if isinstance(target, CallbackQuery):
        await target.message.edit_text(
            "\n".join(lines),
            parse_mode=ParseMode.HTML,
            reply_markup=markup,
        )
        await target.answer()
    else:
        await target.reply_text(
            "\n".join(lines),
            parse_mode=ParseMode.HTML,
            reply_markup=markup,
        )


async def _show_admin_teachers(target: CallbackQuery, page: int) -> None:
    try:
        await require_platform_membership(
            int(target.from_user.id),
            require_admin=True,
        )
    except DirectoryServiceError as exc:
        return await target.answer(str(exc), show_alert=True)
    items, total = await list_directory_profiles(
        application_status=APPLICATION_APPROVED,
        page=page,
        page_size=8,
    )
    rows = [
        [
            InlineKeyboardButton(
                _display_name(item)[:28],
                callback_data=f"dir:admin:detail:{item['user_id']}",
            )
        ]
        for item in items
    ]
    navigation: list[InlineKeyboardButton] = []
    if page > 1:
        navigation.append(
            InlineKeyboardButton(
                "上一页",
                callback_data=f"dir:admin:teachers:{page - 1}",
            )
        )
    if page * 8 < total:
        navigation.append(
            InlineKeyboardButton(
                "下一页",
                callback_data=f"dir:admin:teachers:{page + 1}",
            )
        )
    if navigation:
        rows.append(navigation)
    rows.append([InlineKeyboardButton("待审批", callback_data="dir:admin:pending:1")])
    await target.message.edit_text(
        f"<b>已批准老师</b>\n共 {total} 人",
        parse_mode=ParseMode.HTML,
        reply_markup=InlineKeyboardMarkup(rows),
    )
    await target.answer()


async def _show_admin_teacher_detail(target: CallbackQuery, user_id: int) -> None:
    try:
        await require_platform_membership(
            int(target.from_user.id),
            require_admin=True,
        )
    except DirectoryServiceError as exc:
        return await target.answer(str(exc), show_alert=True)
    profile = await get_directory_profile(user_id)
    if not profile:
        return await target.answer("未找到该成员资料。", show_alert=True)
    summary = profile_summary(profile, await get_directory_location(user_id))
    lines = [
        f"<b>{escape(summary['display_name'])}</b>",
        f"用户名：@{escape(summary.get('username') or '未设置')}",
        f"用户 ID：<code>{user_id}</code>",
        f"申请：{escape(APPLICATION_LABELS.get(summary['application_status'], '学生'))}",
        f"位置：{escape(summary['region'] or '尚未更新')}",
        f"榜单：{'已上榜' if summary['listed'] else '未上榜'}",
        f"状态：{'在线' if summary['online'] else '离线'}",
    ]
    rows: list[list[InlineKeyboardButton]] = []
    if summary["application_status"] == APPLICATION_PENDING:
        rows.append(
            [
                InlineKeyboardButton(
                    "批准",
                    callback_data=f"dir:admin:approveask:{user_id}",
                ),
                InlineKeyboardButton(
                    "拒绝",
                    callback_data=f"dir:admin:flow:reject:{user_id}",
                ),
            ]
        )
    if summary["application_status"] == APPLICATION_APPROVED:
        rows.extend(
            [
                [
                    InlineKeyboardButton(
                        "强制下榜" if summary["listed"] else "强制上榜",
                        callback_data=(
                            f"dir:admin:flow:"
                            f"{'unlist' if summary['listed'] else 'list'}:{user_id}"
                        ),
                    ),
                    InlineKeyboardButton(
                        "强制下线" if summary["online"] else "强制上线",
                        callback_data=(
                            f"dir:admin:flow:"
                            f"{'offline' if summary['online'] else 'online'}:{user_id}"
                        ),
                    ),
                ],
                [
                    InlineKeyboardButton(
                        "撤销老师资格",
                        callback_data=f"dir:admin:flow:revoke:{user_id}",
                    )
                ],
            ]
        )
    rows.append([InlineKeyboardButton("返回审批", callback_data="dir:admin:pending:1")])
    await target.message.edit_text(
        "\n".join(lines),
        parse_mode=ParseMode.HTML,
        reply_markup=InlineKeyboardMarkup(rows),
    )
    try:
        await target.answer()
    except Exception:
        pass


async def _start_admin_reason_flow(
    target: CallbackQuery,
    *,
    action: str,
    user_id: int,
) -> None:
    try:
        await require_platform_membership(
            int(target.from_user.id),
            require_admin=True,
        )
    except DirectoryServiceError as exc:
        return await target.answer(str(exc), show_alert=True)
    _admin_flows[int(target.from_user.id)] = {
        "action": action,
        "user_id": int(user_id),
        "expires_at": datetime.now(UTC) + timedelta(minutes=10),
    }
    await target.message.reply_text(
        f"请输入“{TEACHER_ACTION_LABELS.get(action, action)}”的原因，"
        "发送 /cancel 可取消。"
    )
    await target.answer()


async def _confirm_admin_action(target: CallbackQuery, token: str) -> None:
    confirmation = _admin_confirmations.get(token)
    if not confirmation or confirmation["actor_id"] != target.from_user.id:
        return await target.answer("确认已失效，请重新操作。", show_alert=True)
    if confirmation["expires_at"] < datetime.now(UTC):
        _admin_confirmations.pop(token, None)
        return await target.answer("确认已超时，请重新操作。", show_alert=True)
    action = confirmation["action"]
    user_id = int(confirmation["user_id"])
    reason = str(confirmation.get("reason") or "")
    try:
        if action in {"reject", "revoke"}:
            profile = await admin_decide_teacher(
                actor=target.from_user,
                user_id=user_id,
                action=action,
                reason=reason,
            )
        else:
            profile = await admin_change_teacher_state(
                actor=target.from_user,
                user_id=user_id,
                action=action,
                reason=reason,
            )
        with_reason = f"\n原因：{reason}" if reason else ""
        with_suppressed_notification = (
            "老师申请已被拒绝" if action == "reject" else
            "老师资格已被撤销" if action == "revoke" else
            f"老师状态已被管理员修改为“{TEACHER_ACTION_LABELS[action]}”"
        )
        try:
            await app.send_message(
                user_id,
                f"{with_suppressed_notification}。{with_reason}",
            )
        except Exception:
            pass
        _admin_confirmations.pop(token, None)
        await target.answer("操作成功。")
        await _show_admin_teacher_detail(target, int(profile["user_id"]))
    except DirectoryServiceError as exc:
        await target.answer(str(exc), show_alert=True)


@app.on_callback_query(filters.regex(r"^dir:"))
async def directory_callback(_, query: CallbackQuery):
    parts = str(query.data).split(":")
    try:
        if parts[1] == "consent":
            consent = parts[2] == "yes"
            await update_user_geocode_consent(
                user=query.from_user,
                consent=consent,
            )
            await query.message.edit_text(
                "已同意区域解析，当前位置已进入解析队列。"
                if consent
                else "已关闭区域解析，位置只用于本地距离计算。"
            )
            return await query.answer("设置已保存。")
        if parts[1] == "radius":
            return await _show_radius_picker(query)
        if parts[1] == "list":
            radius = None if parts[2] == "all" else int(parts[2])
            return await _show_teacher_results(
                query,
                radius_km=radius,
                page=int(parts[3]),
            )
        if parts[1] == "clearask":
            return await query.message.edit_text(
                "清除位置后会自动下榜并下线，确认继续吗？",
                reply_markup=InlineKeyboardMarkup(
                    [
                        [
                            InlineKeyboardButton(
                                "确认清除",
                                callback_data="dir:clear",
                            ),
                            InlineKeyboardButton("取消", callback_data="dir:cancel"),
                        ]
                    ]
                ),
            )
        if parts[1] == "clear":
            await clear_user_location(user=query.from_user)
            await query.message.edit_text("位置已清除，老师状态已同步下线并下榜。")
            return await query.answer("已清除。")
        if parts[1] == "cancel":
            await query.message.edit_text("已取消。")
            return await query.answer()
        if parts[1] == "admin":
            if parts[2] == "pending":
                return await _show_admin_applications(query, page=int(parts[3]))
            if parts[2] == "teachers":
                return await _show_admin_teachers(query, int(parts[3]))
            if parts[2] == "detail":
                return await _show_admin_teacher_detail(query, int(parts[3]))
            if parts[2] == "approveask":
                user_id = int(parts[3])
                return await query.message.edit_text(
                    "批准后老师身份将在全部群和 Bot 中生效，确认继续吗？",
                    reply_markup=InlineKeyboardMarkup(
                        [
                            [
                                InlineKeyboardButton(
                                    "确认批准",
                                    callback_data=f"dir:admin:approve:{user_id}",
                                ),
                                InlineKeyboardButton(
                                    "取消",
                                    callback_data=f"dir:admin:detail:{user_id}",
                                ),
                            ]
                        ]
                    ),
                )
            if parts[2] == "approve":
                profile = await admin_decide_teacher(
                    actor=query.from_user,
                    user_id=int(parts[3]),
                    action="approve",
                )
                try:
                    await app.send_message(
                        int(profile["user_id"]),
                        "你的老师申请已通过，可以在菜单中自助上榜。",
                    )
                except Exception:
                    pass
                await query.answer("已批准。")
                return await _show_admin_teacher_detail(
                    query,
                    int(profile["user_id"]),
                )
            if parts[2] == "flow":
                return await _start_admin_reason_flow(
                    query,
                    action=parts[3],
                    user_id=int(parts[4]),
                )
            if parts[2] == "confirm":
                return await _confirm_admin_action(query, parts[3])
    except (DirectoryServiceError, ValueError) as exc:
        return await query.answer(str(exc), show_alert=True)
    except Exception as exc:
        log.error(f"师生目录回调失败：{exc}")
        return await query.answer("操作失败，请稍后重试。", show_alert=True)


@app.on_message(filters.command("cancel") & filters.private, group=-20)
async def cancel_directory_flow(_, message: Message):
    flow = _admin_flows.pop(message.from_user.id, None) if message.from_user else None
    if not flow:
        return
    await message.reply_text("已取消当前老师管理操作。")
    raise StopPropagation


@app.on_message(filters.private & filters.text, group=13)
async def directory_private_text(_, message: Message):
    if not message.from_user:
        return
    flow = _admin_flows.get(message.from_user.id)
    if flow:
        if flow["expires_at"] < datetime.now(UTC):
            _admin_flows.pop(message.from_user.id, None)
            return await message.reply_text("操作已超时，请重新打开老师审批。")
        reason = str(message.text or "").strip()
        if not reason:
            return await message.reply_text("原因不能为空，请重新输入。")
        token = token_urlsafe(8)
        _admin_confirmations[token] = {
            **flow,
            "actor_id": message.from_user.id,
            "reason": reason,
            "expires_at": datetime.now(UTC) + timedelta(minutes=10),
        }
        _admin_flows.pop(message.from_user.id, None)
        return await message.reply_text(
            f"确认执行“{TEACHER_ACTION_LABELS.get(flow['action'], flow['action'])}”吗？"
            f"\n用户 ID：{flow['user_id']}\n原因：{escape(reason)}",
            reply_markup=InlineKeyboardMarkup(
                [
                    [
                        InlineKeyboardButton(
                            "确认执行",
                            callback_data=f"dir:admin:confirm:{token}",
                        ),
                        InlineKeyboardButton("取消", callback_data="dir:cancel"),
                    ]
                ]
            ),
        )
    text = str(message.text or "").strip()
    if text == BUTTON_NEARBY:
        return await _show_radius_picker(message)
    if text == BUTTON_RANK:
        return await _show_teacher_results(message, radius_km=None, page=1)
    if text == BUTTON_APPLY:
        return await _apply_teacher(message)
    if text == BUTTON_STATUS:
        return await _show_status(message)
    if text == BUTTON_PRIVACY:
        return await _show_privacy(message)
    if text == BUTTON_CLEAR_LOCATION:
        return await message.reply_text(
            "清除位置后会自动下榜并下线，确认继续吗？",
            reply_markup=InlineKeyboardMarkup(
                [
                    [
                        InlineKeyboardButton("确认清除", callback_data="dir:clear"),
                        InlineKeyboardButton("取消", callback_data="dir:cancel"),
                    ]
                ]
            ),
        )
    if text == BUTTON_APPROVAL:
        return await _show_admin_applications(message)
    action = {
        BUTTON_LIST: "list",
        BUTTON_UNLIST: "unlist",
        BUTTON_ONLINE: "online",
        BUTTON_OFFLINE: "offline",
    }.get(text)
    if action:
        return await _self_state_command(message, action)


@app.on_message(filters.group & filters.text, group=13)
async def teacher_presence_group_text(_, message: Message):
    if not message.from_user:
        return
    text = str(message.text or "").strip()
    action = {"上线": "online", "下线": "offline"}.get(text)
    if not action:
        return
    profile = await get_directory_profile(message.from_user.id)
    if not profile or profile.get("application_status") != APPLICATION_APPROVED:
        return
    if not await _verify_group_member(message):
        return
    try:
        _, applied = await change_own_teacher_state(
            user=message.from_user,
            action=action,
            source="telegram_group",
            idempotency_key=(
                f"teacher-presence:{message.chat.id}:{message.id}:"
                f"{message.from_user.id}"
            ),
            chat_id=message.chat.id,
        )
        if applied:
            await message.reply_text(
                f"全平台状态已切换为{'在线' if action == 'online' else '离线'}。"
                + ("24 小时后将自动下线。" if action == "online" else "")
            )
    except DirectoryServiceError as exc:
        await message.reply_text(str(exc))


@app.on_chat_member_updated(group=13)
async def directory_chat_member_updated(_, update: ChatMemberUpdated):
    member = update.new_chat_member or update.old_chat_member
    if not member or not member.user or member.user.is_bot:
        return
    status = update.new_chat_member.status if update.new_chat_member else ChatMemberStatus.LEFT
    active = status in {
        ChatMemberStatus.OWNER,
        ChatMemberStatus.ADMINISTRATOR,
        ChatMemberStatus.MEMBER,
        ChatMemberStatus.RESTRICTED,
    }
    await observe_group_member(
        chat_id=update.chat.id,
        chat_title=update.chat.title or "",
        user=member.user,
        status=status_value(status),
        active=active,
        verified=True,
    )


start_presence_sweeper()