import json
import datetime
from typing import Dict, List

from pymysql.cursors import DictCursor

from applications.api.odps_api import ODPSApi
from applications.db import DatabaseConnector
from config import growth_config, long_articles_config


def format_video_values(value_list: List[List]) -> Dict:
    keyword_map = {}
    for line in value_list:
        video_id = line[0]
        video_data = json.loads(line[1])
        video_keywords = video_data["video_keywords"]
        if video_keywords:
            try:
                keywords = json.loads(video_keywords)
            except:
                if "," in video_keywords:
                    keywords = video_keywords.split(",")
                elif "，" in video_keywords:
                    keywords = video_keywords.split("，")
                else:
                    continue
            for keyword in keywords:
                keyword = keyword.strip()
                if keyword_map.get(keyword):
                    keyword_map[keyword].append(video_id)
                else:
                    keyword_map[keyword] = [video_id]

    return keyword_map


def get_candidate_videos(db_client):
    """
    获取待处理的视频
    """
    sql = f"""
        SELECT video_id
        FROM content_platform_video
        WHERE dt > DATE_SUB(CURRENT_DATE, INTERVAL 5 DAY)
        group by video_id;
    """
    response = db_client.fetch(sql, cursor_type=DictCursor)
    return response


def get_video_detail(video_tuple: tuple, odps_server: ODPSApi, yesterday: str):
    """
    获取视频详情
    """
    fetch_query = f"""
        select id, `data` from loghubods.videoid_feature_aitags 
        where dt = '{yesterday}'
        and id in {video_tuple};
    """
    res = odps_server.execute_sql(fetch_query)
    values_list = res.values.tolist()
    return values_list


def save_to_database(date_str, keyword_map, db_client):
    """
    保存到数据库
    """
    sql = f"""
        insert into video_keywords_map (date, keywords_map, status)
        values (%s, %s, %s);
    """
    affected_rows = db_client.save(sql, (date_str, keyword_map, 1))
    if affected_rows:
        update_query = f"""
            update video_keywords_map
            set status = %s where date != %s;
        """
        return db_client.save(update_query, (0, date_str))
    else:
        return 0


def deal():
    yesterday = datetime.date.today() - datetime.timedelta(days=1)
    yesterday_str = yesterday.strftime("%Y%m%d")

    growth_client = DatabaseConnector(growth_config)
    growth_client.connect()

    long_articles_client = DatabaseConnector(long_articles_config)
    long_articles_client.connect()

    odps_server = ODPSApi()

    video_ids = get_candidate_videos(growth_client)
    video_id_tuple = tuple([i["video_id"] for i in video_ids])

    video_details = get_video_detail(video_id_tuple, odps_server, yesterday_str)

    keyword_map = format_video_values(video_details)

    save_to_database(
        yesterday_str, json.dumps(keyword_map, ensure_ascii=False), long_articles_client
    )