import json
from .. import config
from .. exceptions import ( 
    ResponseContextError, 
    NoContentsException, 
    NoContinuationsException )


logger = config.logger(__name__)

def parse(jsn):
    """
    Parse replay chat data.
    Parameter:
    ----------
    jsn : dict
        JSON of replay chat data.
    Returns:
    ------
        continuation : str
        actions : list

    """
    if jsn is None: 
        raise ValueError("parameter JSON is None")
    if jsn['response']['responseContext'].get('errors'):
        raise ResponseContextError('動画に接続できません。'
    '動画IDが間違っているか、動画が削除／非公開の可能性があります。')
    contents=jsn['response'].get('continuationContents')
    #配信が終了した場合、もしくはチャットデータが取得できない場合
    if contents is None:
        raise NoContentsException('チャットデータを取得できませんでした。')

    cont = contents['liveChatContinuation']['continuations'][0]
    if cont is None:
        raise NoContinuationsException('Continuationがありません。')
    metadata = cont.get('liveChatReplayContinuationData')
    if metadata:
        continuation = metadata.get("continuation")
        actions = contents['liveChatContinuation'].get('actions')
        return continuation, actions
    return None, []

    # if actions is None:
    #     return {"continuation":None,"chatdata":[]}
    

def get_offset(item):
    return int(item['replayChatItemAction']["videoOffsetTimeMsec"])

def get_id(item):
    #return list((list(item['replayChatItemAction']["actions"][0].values())[0])['item'].values())[0]['id']
    return list(item['replayChatItemAction']['actions'][0]['addChatItemAction']['item'].values())[0]['id']

def get_type(item):
    return list(item['replayChatItemAction']["actions"][0]['addChatItemAction']['item'].keys())[0]