import random
from datetime import datetime, timedelta

from services.log import logger
from services.db_context import db
from models.sigin_group_user import SignGroupUser
from models.group_member_info import GroupInfoUser
from models.bag_user import BagUser
from configs.config import MAX_SIGN_GOLD


async def group_user_check_in(user_qq: int, group: int) -> str:
    'Returns string describing the result of checking in'
    present = datetime.now()
    async with db.transaction():
        # 取得相应用户
        user = await SignGroupUser.ensure(user_qq, group, for_update=True)
        # 如果同一天签到过，特殊处理
        if user.checkin_time_last.date() == present.date():
            return _handle_already_checked_in(user)
        return await _handle_check_in(user_qq, group, present)    # ok


def _handle_already_checked_in(user: SignGroupUser) -> str:
    return f'已经签到过啦~ 好感度：{user.impression:.2f}'


async def _handle_check_in(user_qq: int, group: int, present: datetime) -> str:
    user = await SignGroupUser.ensure(user_qq, group, for_update=True)
    impression_added = random.random()
    present = present + timedelta(hours=8)
    critx2 = random.random()
    add_probability = user.add_probability
    specify_probability = user.specify_probability
    if critx2 + add_probability > 0.97:
        impression_added *= 2
    elif critx2 < specify_probability:
        impression_added *= 2
    new_impression = user.impression + impression_added
    message = random.choice((
        '谢谢，你是个好人！',
        '对了，来喝杯茶吗？',
    ))
    await user.update(
        checkin_count=user.checkin_count + 1,
        checkin_time_last=present,
        impression=new_impression,
        add_probability=0,
        specify_probability=0,
    ).apply()
    # glod = await random_glod(user_qq, group, specify_probability)
    if user.impression < 1:
        impression = 1
    else:
        impression = user.impression
    gold = random.randint(1, 100)
    imgold = random.randint(1, int(impression))
    if imgold > MAX_SIGN_GOLD:
        imgold = MAX_SIGN_GOLD
    await BagUser.add_gold(user_qq, group, gold + imgold)
    if critx2 + add_probability > 0.97 or critx2 < specify_probability:
        logger.info(f'(USER {user.user_qq}, GROUP {user.belonging_group})'
                    f' CHECKED IN successfully. score: {new_impression:.2f} (+{impression_added * 2:.2f}).获取金币：{gold+imgold}')
        return f'{message} 好感度：{new_impression:.2f} (+{impression_added/2:.2f}×2)！！！\n获取金币：{gold} \n好感度额外获得金币：{imgold}'
    else:
        logger.info(f'(USER {user.user_qq}, GROUP {user.belonging_group})'
                    f' CHECKED IN successfully. score: {new_impression:.2f} (+{impression_added:.2f}).获取金币：{gold+imgold}')
        return f'{message} 好感度：{new_impression:.2f} (+{impression_added:.2f})\n获取金币：{gold} \n好感度额外获得金币：{imgold}'


async def group_user_check(user_qq: int, group: int) -> str:
    # heuristic: if users find they have never checked in they are probable to check in
    user = await SignGroupUser.ensure(user_qq, group)
    gold = await BagUser.get_gold(user_qq, group)
    return '好感度：{:.2f}\n金币：{}\n历史签到数：{}\n上次签到日期：{}'.format(
        user.impression,
        gold,
        user.checkin_count,
        user.checkin_time_last.date() if user.checkin_time_last != datetime.min else '从未',
    )


async def group_impression_rank(group: int) -> str:
    result = "\t好感度排行榜\t\n"
    user_qq_list, impression_list = await SignGroupUser.query_impression_all(group)
    _count = 11
    if user_qq_list and impression_list:
        for i in range(1, len(user_qq_list)):
            if len(user_qq_list) == 0 or len(impression_list) == 0 or i == _count:
                break
            impression = max(impression_list)
            index = impression_list.index(impression)
            user_qq = user_qq_list[index]
            try:
                user_name = (await GroupInfoUser.select_member_info(user_qq, group)).user_name
            except Exception as e:
                logger.info(f"USER {user_qq}, GROUP {group} 不在群内")
                _count += 1
                impression_list.remove(impression)
                user_qq_list.remove(user_qq)
                continue
            result += f"{i - _count + 11}. {user_name}: {impression:.2f}\n"
            impression_list.remove(impression)
            user_qq_list.remove(user_qq)
    return result[:-1]


async def random_gold(user_id, group_id, impression):
    if impression < 1:
        impression = 1
    gold = random.randint(1, 100) + random.randint(1, int(impression))
    if await BagUser.add_gold(user_id, group_id, gold):
        return gold
    else:
        return 0