import hashlib
import time
import server.arcworld
from server.sql import Connect
import functools
from setting import Config


def arc_login(name: str, password: str, device_id: str):  # 登录判断
    # 查询数据库中的user表，验证账号密码，返回并记录token，多返回个error code
    # token采用user_id和时间戳连接后hash生成（真的是瞎想的，没用bear）
    # 密码和token的加密方式为 SHA-256

    error_code = 108
    token = None
    with Connect() as c:
        hash_pwd = hashlib.sha256(password.encode("utf8")).hexdigest()
        c.execute('''select user_id, password from user where name = :name''', {
            'name': name})
        x = c.fetchone()
        if x is not None:
            if x[1] == '':
                # 账号封禁
                error_code = 106
            elif x[1] == hash_pwd:
                user_id = str(x[0])
                now = int(time.time() * 1000)
                token = hashlib.sha256(
                    (user_id + str(now)).encode("utf8")).hexdigest()
                c.execute(
                    '''select login_device from login where user_id = :user_id''', {"user_id": user_id})
                y = c.fetchall()
                if y:
                    device_list = []
                    for i in y:
                        if i[0]:
                            device_list.append(i[0])
                        else:
                            device_list.append('')

                    should_delete_num = len(
                        device_list) + 1 - Config.LOGIN_DEVICE_NUMBER_LIMIT

                    if not Config.ALLOW_LOGIN_SAME_DEVICE:
                        if device_id in device_list:  # 对相同设备进行删除
                            c.execute('''delete from login where login_device=:a''', {
                                'a': device_id})
                            should_delete_num = len(
                                device_list) + 1 - device_list.count(device_id) - Config.LOGIN_DEVICE_NUMBER_LIMIT

                    if should_delete_num >= 1:  # 删掉多余token
                        c.execute('''delete from login where rowid in (select rowid from login where user_id=:user_id limit :a);''',
                                  {'user_id': user_id, 'a': int(should_delete_num)})

                c.execute('''insert into login(access_token, user_id, login_device) values(:access_token, :user_id, :device_id)''', {
                    'user_id': user_id, 'access_token': token, 'device_id': device_id})
                error_code = None
            else:
                # 密码错误
                error_code = 104
        else:
            # 用户名错误
            error_code = 104

    return token, error_code


def arc_register(name: str, password: str, device_id: str):  # 注册
    # 账号注册，只记录hash密码和用户名，生成user_id和user_code，自动登录返回token
    # token和密码的处理同登录部分

    def build_user_code(c):
        # 生成9位的user_code，用的自然是随机
        import random
        flag = True
        while flag:
            user_code = ''.join([str(random.randint(0, 9)) for i in range(9)])
            c.execute('''select exists(select * from user where user_code = :user_code)''',
                      {'user_code': user_code})
            if c.fetchone() == (0,):
                flag = False
        return user_code

    def build_user_id(c):
        # 生成user_id，往后加1
        c.execute('''select max(user_id) from user''')
        x = c.fetchone()
        if x[0] is not None:
            return x[0] + 1
        else:
            return 2000001

    def insert_user_char(c, user_id):
        # 为用户添加所有可用角色
        c.execute('''select * from character''')
        x = c.fetchall()
        if x != []:
            for i in x:
                c.execute('''insert into user_char values(:a,:b,:c,:d,:e,:f,:g,:h,:i,:j,:k,:l,:m,:n,:o)''', {
                          'a': user_id, 'b': i[0], 'c': i[2], 'd': i[3], 'e': i[4], 'f': i[5], 'g': i[6], 'h': i[7], 'i': i[8], 'j': i[9], 'k': i[10], 'l': i[11], 'm': i[12], 'n': i[14], 'o': i[15]})

    user_id = None
    token = None
    error_code = 108
    with Connect() as c:
        hash_pwd = hashlib.sha256(password.encode("utf8")).hexdigest()
        c.execute(
            '''select exists(select * from user where name = :name)''', {'name': name})
        if c.fetchone() == (0,):
            user_code = build_user_code(c)
            user_id = build_user_id(c)
            now = int(time.time() * 1000)
            c.execute('''insert into user(user_id, name, password, join_date, user_code, rating_ptt, 
            character_id, is_skill_sealed, is_char_uncapped, is_char_uncapped_override, is_hide_rating, favorite_character, max_stamina_notification_enabled, current_map, ticket)
            values(:user_id, :name, :password, :join_date, :user_code, 0, 0, 0, 0, 0, 0, -1, 0, '', 0)
            ''', {'user_code': user_code, 'user_id': user_id, 'join_date': now, 'name': name, 'password': hash_pwd})
            c.execute('''insert into recent30(user_id) values(:user_id)''', {
                'user_id': user_id})

            token = hashlib.sha256(
                (str(user_id) + str(now)).encode("utf8")).hexdigest()
            c.execute('''insert into login(access_token, user_id, login_device) values(:access_token, :user_id, :device_id)''', {
                'user_id': user_id, 'access_token': token, 'device_id': device_id})

            insert_user_char(c, user_id)
            error_code = 0
        else:
            error_code = 101

    return user_id, token, error_code


def token_get_id(token: str):
    # 用token获取id，没有考虑不同用户token相同情况，说不定会有bug

    user_id = None
    with Connect() as c:
        c.execute('''select user_id from login where access_token = :token''', {
            'token': token})
        x = c.fetchone()
        if x is not None:
            user_id = x[0]

    return user_id


def code_get_id(user_code):
    # 用user_code获取id

    user_id = None

    with Connect() as c:
        c.execute('''select user_id from user where user_code = :a''',
                  {'a': user_code})
        x = c.fetchone()
        if x is not None:
            user_id = x[0]

    return user_id


def auth_required(request):
    # arcaea登录验证，写成了修饰器
    def decorator(view):
        @functools.wraps(view)
        def wrapped_view(*args, **kwargs):

            user_id = None
            with Connect() as c:
                headers = request.headers
                token = headers['Authorization']
                token = token[7:]
                user_id = token_get_id(token)

            if user_id is not None:
                return view(user_id, *args, **kwargs)
            else:
                return '''{"success":false,"error_code":108}'''

        return wrapped_view
    return decorator