"""
@author: luojunhui
"""
import traceback
from typing import Dict, List

from aiomysql.cursors import DictCursor

from applications.log import logging
from applications.config import Config
from applications.const import rematch_task_const
from applications.etl_function import download_cover
from applications.etl_function import download_video
from applications.etl_function import generate_video_path
from applications.etl_function import upload_to_oss
from applications.spider import search_videos_from_web
from .utils import get_kimi_result


class ReMatchTask(object):
    """
    重新匹配任务
    """

    def __init__(self, db_client):
        self.db_client = db_client
        self.config = Config()
        self.article_match_video_table = self.config.article_match_video_table
        self.article_text_table = self.config.article_text_table
        self.article_crawler_video_table = self.config.article_crawler_video_table

    async def get_tasks(self) -> List[Dict]:
        """
        get task needs to rematch
        """
        select_sql = f"""
            SELECT DISTINCT content_id 
            FROM article_re_match_record
            WHERE status = {rematch_task_const.REMATCH_INIT_STATUS};
        """
        result = await self.db_client.async_select(select_sql, cursor_type=DictCursor)
        logging(
            code="rematch_1001",
            function="get_tasks",
            info="获取content_id数量： {}".format(len(result))
        )
        return result

    async def async_download_video_list(self, to_download_videos: List[Dict], illegal_platform_id_list: List[str]) -> int:
        """
        异步下载视频
        """
        success_count = 0
        for video in to_download_videos:
            # check whether video is illegal
            out_key = "{}_{}".format(video['platform'], video['out_video_id'])
            if out_key in illegal_platform_id_list:
                continue
            # start download
            try:
                local_video_path, local_cover_path = generate_video_path(video['platform'], video['out_video_id'])
                # download videos
                file_path = await download_video(
                    file_path=local_video_path,
                    platform=video['platform'],
                    video_url=video['video_url']
                )
                if not file_path:
                    # 说明视频下载失败，无需上传该视频, 将该条记录设置为失败状态
                    update_sql = f"""
                            UPDATE {self.article_crawler_video_table}
                            SET download_status = %s
                            WHERE id = %s;
                    """

                    await self.db_client.async_insert(
                        sql=update_sql,
                        params=(rematch_task_const.VIDEO_DOWNLOAD_FAIL_STATUS, video['id'])
                    )
                else:
                    # download cover
                    cover_path = await download_cover(
                        file_path=local_cover_path,
                        platform=video['platform'],
                        cover_url=video['cover_url']
                    )
                    # upload video to oss
                    oss_video = await upload_to_oss(
                        local_video_path=file_path,
                        download_type="video"
                    )
                    # upload cover to oss
                    if cover_path:
                        oss_cover = await upload_to_oss(
                            local_video_path=cover_path,
                            download_type="image"
                        )
                    else:
                        oss_cover = None

                    # change status to success
                    update_sql = f"""
                        UPDATE {self.article_crawler_video_table}
                        SET video_oss_path = %s, cover_oss_path = %s, download_status = %s
                        WHERE id = %s;
                    """
                    await self.db_client.async_insert(
                        sql=update_sql,
                        params=(
                            oss_video,
                            oss_cover,
                            rematch_task_const.VIDEO_DOWNLOAD_SUCCESS_STATUS,
                            video['id']
                        )
                    )
                    success_count += 1
                # 如果下载的视频数已经大于3， 则直接退出循环，修改状态为ETL成功状态
                if success_count > rematch_task_const.MIN_MATCH_VIDEO_NUM:
                    return success_count
            except Exception as e:
                update_sql = f"""
                            UPDATE {self.article_crawler_video_table}
                            SET download_status = %s
                            WHERE id = %s;
                            """
                await self.db_client.async_insert(
                    sql=update_sql,
                    params=(rematch_task_const.VIDEO_DOWNLOAD_FAIL_STATUS, video['id'])
                )

        return success_count

    async def download_upload_task(self, content_id: str, illegal_platform_id_list: List[str], legal_not_downloaded_videos=None) -> int:
        """
        下载任务
        """
        success_count = 0
        if legal_not_downloaded_videos:
            # 下载legal_not_download_videos, 记录下载成功数量
            new_download_count = await self.async_download_video_list(
                to_download_videos=legal_not_downloaded_videos,
                illegal_platform_id_list=illegal_platform_id_list
            )
            success_count += new_download_count
            return success_count

        select_sql = f"""
            SELECT id, out_video_id, platform, video_title, video_url, cover_url
            FROM {self.article_crawler_video_table} 
            WHERE content_id = {content_id} AND download_status = {rematch_task_const.VIDEO_DOWNLOAD_INIT_STATUS};
        """
        to_download_videos = await self.db_client.async_select(select_sql, cursor_type=DictCursor)
        new_download_count = await self.async_download_video_list(
            to_download_videos=to_download_videos,
            illegal_platform_id_list=illegal_platform_id_list
        )
        success_count += new_download_count
        return success_count

    async def spider_task(self, content_id: str) -> int:
        """
        爬虫抓取任务
        """
        kimi_result = await get_kimi_result(
            content_id=content_id,
            article_text_table=self.article_text_table,
            db_client=self.db_client
        )
        # 该搜索任务是content_id粒度，因此将trace_id 传为content_id
        search_videos_count = await search_videos_from_web(
            info={
                "ori_title": kimi_result['ori_title'],
                "kimi_summary": kimi_result['kimi_summary'],
                "kimi_keys": kimi_result['kimi_keys'],
                "trace_id": content_id,
                "gh_id": rematch_task_const.TASK_DEFAULT_GH_ID,
                "content_id": content_id,
                "crawler_video_table": self.article_crawler_video_table
            },
            gh_id_map={},
            db_client=self.db_client
        )
        return search_videos_count

    async def update_each_content_id(self, content_id: str) -> None:
        """
        更新每一个content_id的视频信息
        """
        select_sql = f"""
            SELECT
                id, platform, out_video_id, video_oss_path, download_status, is_illegal, video_url, cover_url
            FROM
                {self.article_crawler_video_table}
            WHERE content_id = '{content_id}';
        """
        record_list = await self.db_client.async_select(select_sql, cursor_type=DictCursor)
        # 获取违规视频，违规视频out_id && platform
        illegal_videos = [record for record in record_list if record["is_illegal"] == rematch_task_const.VIDEO_UNSAFE]
        illegal_platform_id_list = [
            "{}_{}".format(record['platform'], record['out_video_id']) for record in illegal_videos
        ]

        # 处理非违规字段
        legal_downloaded_videos = []
        legal_not_downloaded_videos = []
        for record in record_list:
            if record['is_illegal'] == rematch_task_const.VIDEO_UNSAFE:
                continue
            else:
                out_key = "{}_{}".format(record['platform'], record['out_video_id'])
                if out_key in illegal_platform_id_list:
                    continue
                if record['download_status'] == rematch_task_const.VIDEO_DOWNLOAD_INIT_STATUS:
                    legal_not_downloaded_videos.append(record)
                elif record['download_status'] == rematch_task_const.VIDEO_DOWNLOAD_SUCCESS_STATUS:
                    legal_downloaded_videos.append(record)
                else:
                    continue

        if len(legal_downloaded_videos) >= rematch_task_const.MIN_MATCH_VIDEO_NUM:
            logging(
                code="rematch_1002",
                info="存在{}条以上待合规已下载内容，无需处理该content_id".format(rematch_task_const.MIN_MATCH_VIDEO_NUM),
                data={
                    "content_id": content_id
                }
            )
            return
        elif len(legal_not_downloaded_videos + legal_downloaded_videos) >= rematch_task_const.MIN_MATCH_VIDEO_NUM:
            logging(
                code="rematch_1003",
                info="存在{}条以上待合规内容".format(rematch_task_const.MIN_MATCH_VIDEO_NUM),
                data={
                    "content_id": content_id,
                    "待下载数量": len(legal_not_downloaded_videos),
                    "已下载数量": len(legal_downloaded_videos)
                }
            )
            await self.download_upload_task(
                content_id=content_id,
                illegal_platform_id_list=illegal_platform_id_list,
                legal_not_downloaded_videos=legal_not_downloaded_videos
            )
        else:
            logging(
                code="rematch_1004",
                info="重新执行爬虫任务",
                data={
                    "content_id": content_id,
                }
            )
            await self.spider_task(content_id=content_id)
            await self.download_upload_task(
                content_id=content_id,
                illegal_platform_id_list=illegal_platform_id_list
            )

    async def check_whether_get_enough_videos(self, content_id: str) -> bool:
        """
        check 该content_id是否存在足够的视频
        """
        select_sql = f"""
            SELECT count(1)
            FROM {self.article_crawler_video_table}
            WHERE content_id = '{content_id}' 
                AND download_status = {rematch_task_const.VIDEO_DOWNLOAD_SUCCESS_STATUS} 
                AND is_illegal = {rematch_task_const.VIDEO_SAFE};
        """
        count_tuple = await self.db_client.async_select(select_sql)
        count = count_tuple[0][0]
        if count >= rematch_task_const.MIN_MATCH_VIDEO_NUM:
            return True
        else:
            return False

    async def update_content_id_status(self, content_id: str) -> int:
        """
        更新content_id的status为成功
        """
        update_sql = f"""
            UPDATE article_re_match_record
            SET status = %s
            WHERE content_id = '{content_id}';
        """
        affected_rows = await self.db_client.async_insert(
            update_sql,
            params=(rematch_task_const.REMATCH_SUCCESS_STATUS,)
        )
        return affected_rows

    async def deal(self):
        """
        do job here
        """
        task_list = await self.get_tasks()
        for task in task_list:
            content_id = task['content_id']
            try:
                await self.update_each_content_id(content_id=content_id)

                if await self.check_whether_get_enough_videos(content_id=content_id):
                    # 修改状态为1
                    await self.update_content_id_status(content_id=content_id)
                else:
                    continue
            except Exception as e:
                error_stack = traceback.format_exc()
                logging(
                    code="rematch_1010",
                    function="update_each_content_id",
                    data={
                        "error_stack": error_stack,
                        "error": str(e),
                        "content_id": content_id
                    }
                )