"""
@author luojunhui
@description: find top fission / read oss path list
"""

from applications.const import server_const
from applications.match_algorithm import get_content_id_fission_info
from applications.match_algorithm import get_history_content_ids


class OssRank:
    """
    input: content_id
    output: find the top fission / read oss path list
    """
    def __init__(self, db_client, params):
        self.db_client = db_client
        self.params = params
        self.content_id = None

    async def check_params(self):
        """
        check params
        """
        try:
            self.content_id = self.params['contentId']
            self.video_limit = self.params.get("videoLimit", server_const.VIDEO_LIMIT)
            return
        except KeyError as e:
            result = {
                "error": str(e),
                "message": "invalid params",
                "data": self.params,
                "code": server_const.PARAMS_CHECK_FAILED_CODE
            }
            return result
        
    async def deal(self):
        """
        entrance of this class
        """
        params_error = await self.check_params()
        if params_error:
            return params_error
        else:
            history_content_tuple = await get_history_content_ids(
                content_id=self.content_id, 
                db_client=self.db_client
                )
            
            if history_content_tuple:
                oss_path_result = await get_content_id_fission_info(
                    content_id_tuple=history_content_tuple, 
                    db_client=self.db_client,
                    video_limit=self.video_limit
                    )
                if oss_path_result:
                    oss_path_list = [
                        {
                            "oss_name": i['oss_name'],
                            "fission_0_on_read": i['fission_0_on_read']
                        }
                        for i in oss_path_result
                    ]
                    code = server_const.SUCCESS_CODE
                else:
                    oss_path_list = []
                    code = server_const.FAIL_CODE
                
                return {
                    "oss_path_list": oss_path_list,
                    "code": code
                }
            else:
                return {
                    "oss_path_list": [],
                    "code": server_const.FAIL_CODE
                }