import json
from re import Pattern

from session import app
from flask import render_template, make_response, abort
import re
import random
from dao import *

MOBILE_AGENTS_PATTERN: Pattern[str] = re.compile(
    r"(android|bb\d+|meego).+mobile|avantgo|bada/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|"
    r"ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)/|plucker|"
    r"pocket|psp|series([46])0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino",
    re.IGNORECASE,
)


def is_mobile_request(user_agent: str) -> bool:
    """
    判断是否是移动端
    :param user_agent: UA
    :return: 是否
    """
    return bool(MOBILE_AGENTS_PATTERN.search(user_agent))


def fetch_user_menu_summary() -> dict[str, float]:
    """
    获取今天所有人的投票汇总
    :return: 品类->数量
    """
    all_menu = list(fetch_all_user_today_menu())
    if len(all_menu) > 0:
        menus = list(map(lambda x: json.loads(x[1]), all_menu))
        menu_keys = set()
        for x in menus:
            for k in x:
                menu_keys.add(k)
        result = {}
        for k in menu_keys:
            result[k] = 0
        for x in menus:
            for k in x:
                result[k] += x[k]
        return result
    return {}


def within_time() -> bool:
    """
    判断是否在投票时间内
    :return: 是否
    """
    start_time = datetime.strptime(str(datetime.now().date()) + ' 8:00', '%Y-%m-%d %H:%M')
    end_time = datetime.strptime(str(datetime.now().date()) + ' 17:30', '%Y-%m-%d %H:%M')
    if start_time < datetime.now() < end_time:
        return True
    return False


def check_roll() -> int:
    """
    判断是否能抽签
    :return: 0 不可以, 1 可以, -1 已抽过
    """
    result = fetch_roll_result()
    if result is not None:
        return -1
    return 0 if within_time() else 1


def vote_reduce(summary: dict[str, float]) -> dict[str, float]:
    """
    降低昨天点过的餐的中奖率
    :param summary: 投票汇总结果
    :return: 投票汇总结果
    """
    last_result = fetch_roll_result(-1)
    for k in summary:
        if last_result == k:
            summary[k] = summary[k] * 7 / 10
    return summary


@app.route('/dinner/update')
def dinner_update():
    """
    更新投票
    :return: 响应内容
    """
    user_agent_string = request.headers.get('User-Agent')
    if not is_mobile_request(user_agent_string):
        abort(403)
    if check_roll() != 0:
        return make_response(json.dumps(dict(code=-1, data="来晚了，提交失败")))
    value = request.args.get('value').strip()
    if not value:
        set_user_menu('')
        return make_response(json.dumps(dict(code=0, data="OK")))
    value = json.loads(value)
    summary = 0
    for key in value:
        summary += int(value[key])
    if summary <= 0:
        set_user_menu('')
        return make_response(json.dumps(dict(code=0, data="OK")))
    for key in value:
        value[key] = int(value[key]) / summary
    set_user_menu(json.dumps(value, ensure_ascii=False))
    return make_response(json.dumps(dict(code=0, data="OK")))


@app.route('/dinner/roll')
def dinner_roll():
    """
    发起抽签
    :return: 响应
    """
    if check_roll() != 1:
        return make_response(json.dumps(dict(code=-1, data="目前不能抽签")))
    summary = vote_reduce(fetch_user_menu_summary())
    for k in summary:
        summary[k] = int(round(summary[k] * 100))
    pool = []
    for k in summary:
        for i in range(int(summary[k])):
            pool.append(k)
    random.shuffle(pool)
    result = pool[0]
    set_roll_result(result)
    return make_response(json.dumps(dict(code=0, data="OK")))


@app.route('/dinner')
def dinner():
    """
    主页面
    :return: 响应
    """
    menu = get_user_menu()
    if menu:
        menu = json.loads(menu)
    else:
        menu = {}
    summary = vote_reduce(fetch_user_menu_summary())
    last_result = fetch_roll_result(-1)
    total_vote = sum(value for value in summary.values())
    result = fetch_roll_result()
    can_roll = (check_roll() == 1)
    all_choice = list(map(lambda x: {'name': x[0], 'label': x[1]}, fetch_all_menu()))
    return render_template('dinner.html',
                           all_choice=all_choice,
                           menu=menu,
                           summary=summary,
                           total_vote=total_vote,
                           result=result,
                           can_roll=can_roll,
                           last_result=last_result)