import datetime, pytz

class BaseRenderer:
    def __init__(self, item, chattype):
        self.renderer = list(item.values())[0]
        self.chattype = chattype


    def get_snippet(self):

        message = self.get_message(self.renderer)

        return {
            "type"              : self.chattype,
            "liveChatId"        : "",
            "authorChannelId"   : self.renderer.get("authorExternalChannelId"),
            "publishedAt"       : self.get_publishedat(self.renderer.get("timestampUsec",0)),
            "hasDisplayContent" : True,
            "displayMessage"    : message,
            "textMessageDetails": {
                "messageText"   : message  
            }
        }


    def get_authordetails(self):
        authorExternalChannelId = self.renderer.get("authorExternalChannelId")
        #parse subscriber type
        isVerified, isChatOwner, isChatSponsor, isChatModerator = (
            self.get_badges(self.renderer)
        )
        return  {
            "channelId"         : authorExternalChannelId,
            "channelUrl"        : "http://www.youtube.com/channel/"+authorExternalChannelId,
            "displayName"       : self.renderer["authorName"]["simpleText"],
            "profileImageUrl"   : self.renderer["authorPhoto"]["thumbnails"][1]["url"] ,
            "isVerified"        : isVerified,
            "isChatOwner"       : isChatOwner,
            "isChatSponsor"     : isChatSponsor,
            "isChatModerator"   : isChatModerator
        }    


    def get_message(self,renderer):
        message = ''
        if renderer.get("message"):
            runs=renderer["message"].get("runs")
            if runs:
                for r in runs:
                    if r:
                        if r.get('emoji'):
                            message += r['emoji'].get('shortcuts',[''])[0]
                        else:
                            message += r.get('text','')
        return message

    def get_badges(self,renderer):
        isVerified = False
        isChatOwner = False
        isChatSponsor = False
        isChatModerator = False
        badges=renderer.get("authorBadges")
        if badges:
            for badge in badges:
                author_type  = badge["liveChatAuthorBadgeRenderer"]["accessibility"]["accessibilityData"]["label"]
                if author_type == '確認済み':
                    isVerified = True
                if author_type == '所有者':
                    isChatOwner = True
                if 'メンバー' in author_type:
                    isChatSponsor = True
                if author_type == 'モデレーター':
                    isChatModerator = True
        return isVerified, isChatOwner, isChatSponsor, isChatModerator
    
    def get_id(self):
        return self.renderer.get('id')
    
    def get_publishedat(self,timestamp):
        dt = datetime.datetime.fromtimestamp(int(timestamp)/1000000)
        return dt.astimezone(pytz.utc).isoformat(
            timespec='milliseconds').replace('+00:00','Z')