import json
import time
import requests
from typing import List
from fastapi import Depends
from app.schemas.troov import TroovRate

def pop_redis_value_session(redis_client):
    lua_script = '''
local keys = redis.call('keys', 'session:*')
local max_ttl = -1
local max_key = nil

for _, key in ipairs(keys) do
    local ttl = redis.call('ttl', key)
    if ttl > max_ttl then
        max_ttl = ttl
        max_key = key
    end
end

if max_key then
    local value = redis.call('get', max_key)
    redis.call('del', max_key)
    return {max_key, value, max_ttl}
else
    return nil
end
'''
    result = redis_client.eval(lua_script, 0)
    return result

def fetch_rate(session_dic, date):
    url = f"https://api.consulat.gouv.fr/api/team/621540d353069dec25bd0045/reservations/availability?name=Visas&date={date}&places=-5&matching=&maxCapacity=-5&sessionId={session_dic['session_id']}"
    headers = {
        'accept': 'application/json, text/plain, */*',
        'accept-language': 'zh-CN,zh;q=0.9,en;q=0.8',
        'origin': 'https://consulat.gouv.fr',
        'referer': 'https://consulat.gouv.fr/en/ambassade-de-france-en-irlande/appointment?name=Visas',
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36',
        'x-gouv-app-id': session_dic['x_gouv_app_id'],
        'x-gouv-web': 'fr.gouv.consulat'
    }
    try:
        response = requests.get(url, headers=headers)
        return response.text
    except Exception as e:
        return f'Exception info={e}'

def get_rate_by_date(redis_client, date: str) -> List[TroovRate]:
    """
    核心业务逻辑：根据日期返回 Troov 预约信息
    """
    result = None
    while True:
        result = pop_redis_value_session(redis_client)
        if not result:
            time.sleep(1)
            continue
        break
    session_data = result[1]
    session_dic = json.loads(session_data)
    
    res = fetch_rate(session_dic, date)
    return json.loads(res)