#!/usr/bin/env python
# -*- coding: utf-8 -*-


from flask import Blueprint, g, make_response
from flask import request
from flask import session
import json
import jimit as ji

from models.initialize import app
from api.base import Base
from models import User
from models import Utils
from models import Rules


__author__ = 'James Iter'
__date__ = '2017/9/14'
__contact__ = 'james.iter.cn@gmail.com'
__copyright__ = '(c) 2017 by James Iter.'


blueprint = Blueprint(
    'api_user',
    __name__,
    url_prefix='/api/user'
)

blueprints = Blueprint(
    'api_users',
    __name__,
    url_prefix='/api/users'
)


user_base = Base(the_class=User, the_blueprint=blueprint, the_blueprints=blueprints)


@Utils.dumps2response
def r_sign_in():

    args_rules = [
        Rules.LOGIN_NAME.value,
        Rules.PASSWORD.value
    ]

    user = User()
    user.login_name = request.json.get('login_name')
    user.password = request.json.get('password')

    try:
        ji.Check.previewing(args_rules, user.__dict__)
        plain_password = user.password
        user.get_by('login_name')

        if not ji.Security.ji_pbkdf2_check(password=plain_password, password_hash=user.password):
            ret = dict()
            ret['state'] = ji.Common.exchange_state(40101)
            ret['state']['sub']['zh-cn'] = ''.join([ret['state']['sub']['zh-cn'], u': 鉴权失败'])
            raise ji.PreviewingError(json.dumps(ret, ensure_ascii=False))

        token = Utils.generate_token(user.id)
        session['token'] = token
        rep = make_response()
        rep.data = json.dumps({'state': ji.Common.exchange_state(20000)}, ensure_ascii=False)
        return rep

    except ji.PreviewingError, e:
        return json.loads(e.message)


@Utils.dumps2response
def r_sign_out():
    for key in session.keys():
        session.pop(key=key)


@Utils.dumps2response
def r_change_password():

    args_rules = [
        Rules.ID.value
    ]

    user = User()
    user.id = g.token.get('uid', 0).__str__()

    try:
        ji.Check.previewing(args_rules, user.__dict__)
        user.get()

        old_password = request.json.get('old_password', '')

        if not ji.Security.ji_pbkdf2_check(password=old_password, password_hash=user.password):
            ret = dict()
            ret['state'] = ji.Common.exchange_state(40101)
            ret['state']['sub']['zh-cn'] = ''.join([ret['state']['sub']['zh-cn'], u': 鉴权失败'])
            raise ji.PreviewingError(json.dumps(ret, ensure_ascii=False))

        args_rules = [
            Rules.PASSWORD.value
        ]

        user.password = request.json.get('password')

        ji.Check.previewing(args_rules, user.__dict__)
        user.password = ji.Security.ji_pbkdf2(user.password)
        user.update()
    except ji.PreviewingError, e:
        return json.loads(e.message)


@Utils.dumps2response
def r_reset_password(token):

    args_rules = [
        Rules.TOKEN.value
    ]

    try:
        ji.Check.previewing(args_rules, {'token': token})

        token = Utils.verify_token(token, audience='r_reset_password')

        user = User()
        user.id = token['uid']
        user.get()

        args_rules = [
            Rules.PASSWORD.value
        ]

        user.password = request.json.get('password')

        ji.Check.previewing(args_rules, user.__dict__)
        user.password = ji.Security.ji_pbkdf2(user.password)
        user.update()
    except (ji.PreviewingError, ji.JITError), e:
        return json.loads(e.message)


@Utils.dumps2response
def r_send_reset_password_email(login_name):

    args_rules = [
        Rules.LOGIN_NAME.value
    ]

    try:
        ji.Check.previewing(args_rules, {'login_name': login_name})

        user = User()
        try:
            user.login_name = login_name
            user.get_by('login_name')

        except ji.PreviewingError, e:
            # 如果 login_name 没有找到，则尝试从email里面查找
            # 因为用户可能会把登录名理解成email
            user.email = login_name
            user.get_by('email')

        host_url = request.host_url.rstrip('/')
        # 5 分钟有效期
        token = Utils.generate_token(uid=user.id, ttl=300, audience='r_reset_password')

        reset_password_url = '/'.join([host_url, 'reset_password', token])

        smtp_server = ji.NetUtils.smtp_init(host=app.config['smtp_host'], port=app.config.get('smtp_port', None),
                                            login_name=app.config['smtp_user'], password=app.config['smtp_password'],
                                            tls=app.config['smtp_starttls'])

        ji.NetUtils.send_mail(smtp_server=smtp_server, sender=app.config['smtp_user'],
                              receivers=[user.email], title=u'重置登录密码',
                              message=u'请复制以下地址到浏览器中打开：' + reset_password_url)

        ret = dict()
        ret['state'] = ji.Common.exchange_state(20000)
        ret['data'] = {'email': user.email}

        return ret

    except ji.PreviewingError, e:
        return json.loads(e.message)