import aiohttp
import json


class dataApi():
    '''
    从网易云音乐接口直接获取数据（实验性）
    '''
    headers = {"referer": "http://music.163.com"}
    cookies = {"appver": "2.0.2"}

    async def search(self, songName: str):
        '''
        搜索接口，用于由歌曲名查找id
        '''
        async with aiohttp.ClientSession(headers=self.headers, cookies=self.cookies) as session:
            async with session.post(f"http://music.163.com/api/search/get/", data={"s": songName, "limit": 5, "type": 1, "offset": 0},) as r:
                if r.status != 200:
                    return None
                r = await r.text()
                return json.loads(r)

    # async def getHotComments(self, songId: int):
    #     '''
    #     获取热评
    #     '''
    #     async with httpx.AsyncClient() as client:
    #         async with aiohttp.ClientSession(headers=self.headers, cookies=self.cookies) as session:
    #             async with session.post(
    #                     f"https://music.163.com/weapi/v1/resource/hotcomments/R_SO_4_{songId}?csrf_token=",
    #                     data={
    #                         "params": 'D33zyir4L/58v1qGPcIPjSee79KCzxBIBy507IYDB8EL7jEnp41aDIqpHBhowfQ6iT1Xoka8jD+0p
    #                         44nRKNKUA0dv+n5RWPOO57dZLVrd+T1J/sNrTdzUhdHhoKRIgegVcXYjYu+CshdtCBe6WEJozBRlaHyLeJtGrA
    #                         BfMOEb4PqgI3h/uELC82S05NtewlbLZ3TOR/TIIhNV6hVTtqHDVHjkekrvEmJzT5pk1UY6r0=',
    #                         "encSecKey": '45c8bcb07e69c6b545d3045559bd300db897509b8720ee2b45a72bf2d3b216ddc77fb10dae
    #                         c4ca54b466f2da1ffac1e67e245fea9d842589dc402b92b262d3495b12165a721aed880bf09a0a99ff94c959d
    #                         04e49085dc21c78bbbe8e3331827c0ef0035519e89f097511065643120cbc478f9c0af96400ba4649265781fc9079'
    #                     },
    #                                     ) as r:
    #                 if r.status != 200:
    #                     return None
    #                 r = await r.json()
    #                 return r

    async def getSongInfo(self, songId: int):
        '''
        获取歌曲信息
        '''
        async with aiohttp.ClientSession(headers=self.headers, cookies=self.cookies) as session:
            async with session.post(f"http://music.163.com/api/song/detail/?id={songId}&ids=%5B{songId}%5D",) as r:
                if r.status != 200:
                    return None
                r = await r.text()
                return json.loads(r)


class dataGet(dataApi):
    '''
    从dataApi获取数据，并做简单处理
    '''

    api = dataApi()

    async def songIds(self, songName: str, amount=5) -> list:
        '''
        根据用户输入的songName 获取候选songId列表 [默认songId数量：5]
        '''
        songIds = list()
        r = await self.api.search(songName=songName)
        if r is None:
            raise WrongDataError
        idRange = amount if amount < len(
            r["result"]["songs"]) else len(r["result"]["songs"])
        for i in range(idRange):
            songIds.append(r["result"]["songs"][i]["id"])
        return songIds

    # async def songComments(self, songId: int, amount=3) -> dict:
    #     '''
    #     根据传递的单一songId，获取songComments dict [默认评论数量上限：3]
    #     '''
    #     songComments = dict()
    #     r = await self.api.getHotComments(songId)
    #     if r is None:
    #         raise WrongDataError
    #     commentsRange = amount if amount < len(
    #         r['hotComments']) else len(r['hotComments'])
    #     for i in range(commentsRange):
    #         songComments[r['hotComments'][i]['user']
    #         ['nickname']] = r['hotComments'][i]['content']
    #     return songComments

    async def songInfo(self, songId: int):
        '''
        根据传递的songId，获取歌曲名、歌手、专辑等信息，作为dict返回
        '''
        songInfo = dict()
        r = await self.api.getSongInfo(songId)
        if r is None:
            raise WrongDataError
        print(r)
        if r['code'] == '-460':
            return '网易云网络繁忙！'
        songInfo["songName"] = r["songs"][0]["name"]

        songArtists = list()
        for ars in r["songs"][0]["artists"]:
            songArtists.append(ars["name"])
        songArtistsStr = "、".join(songArtists)
        songInfo["songArtists"] = songArtistsStr

        songInfo["songAlbum"] = r["songs"][0]["album"]["name"]

        return songInfo


class dataProcess():
    '''
    将获取的数据处理为用户能看懂的形式
    '''

    @staticmethod
    async def mergeSongInfo(songInfos: list) -> str:
        '''
        将歌曲信息list处理为字符串，供用户点歌
        传递进的歌曲信息list含有多个歌曲信息dict
        '''
        songInfoMessage = "请输入欲点播歌曲的序号：\n"
        numId = 0
        for songInfo in songInfos:
            songInfoMessage += f"{numId}："
            songInfoMessage += songInfo["songName"]
            songInfoMessage += "-"
            songInfoMessage += songInfo["songArtists"]
            songInfoMessage += " 专辑："
            songInfoMessage += songInfo["songAlbum"]
            songInfoMessage += "\n"
            numId += 1
        return songInfoMessage

    @staticmethod
    async def mergeSongComments(songComments: dict) -> str:
        songCommentsMessage = '\n'.join(
            ['%s： %s' % (key, value) for (key, value) in songComments.items()])
        return songCommentsMessage


class Error(Exception):
    '''
    谁知道网易的接口会出什么幺蛾子
    '''
    pass


class WrongDataError(Error):
    def __init__(self, expression, message):
        self.expression = expression
        self.message = message
        self.message += "\n未从网易接口获取到有效的数据！"