from mutagen.easyid3 import EasyID3
from mutagen.id3 import ID3, TORY, TYER, TPUB, APIC, USLT, COMM
from mutagen.mp4 import MP4, MP4Cover
from mutagen.flac import Picture, FLAC

import urllib.request

from spotdl.metadata import EmbedderBase

import logging
logger = logging.getLogger(__name__)

# Apple has specific tags - see mutagen docs -
# http://mutagen.readthedocs.io/en/latest/api/mp4.html
M4A_TAG_PRESET = {
    "album": "\xa9alb",
    "artist": "\xa9ART",
    "date": "\xa9day",
    "title": "\xa9nam",
    "year": "\xa9day",
    "originaldate": "purd",
    "comment": "\xa9cmt",
    "group": "\xa9grp",
    "writer": "\xa9wrt",
    "genre": "\xa9gen",
    "tracknumber": "trkn",
    "albumartist": "aART",
    "discnumber": "disk",
    "cpil": "cpil",
    "albumart": "covr",
    "copyright": "cprt",
    "tempo": "tmpo",
    "lyrics": "\xa9lyr",
    "comment": "\xa9cmt",
}

TAG_PRESET = {}
for key in M4A_TAG_PRESET.keys():
    TAG_PRESET[key] = key


class EmbedderDefault(EmbedderBase):
    supported_formats = ("mp3", "m4a", "flac")

    def __init__(self):
        super().__init__()
        self._m4a_tag_preset = M4A_TAG_PRESET
        self._tag_preset = TAG_PRESET
        # self.provider = "spotify" if metadata["spotify_metadata"] else "youtube"

    def as_mp3(self, path, metadata, cached_albumart=None):
        """ Embed metadata to MP3 files. """
        logger.debug('Writing MP3 metadata to "{path}".'.format(path=path))
        # EasyID3 is fun to use ;)
        # For supported easyid3 tags:
        # https://github.com/quodlibet/mutagen/blob/master/mutagen/easyid3.py
        # Check out somewhere at end of above linked file
        audiofile = EasyID3(path)
        self._embed_basic_metadata(audiofile, metadata, "mp3", preset=TAG_PRESET)
        audiofile["media"] = metadata["type"]
        audiofile["author"] = metadata["artists"][0]["name"]
        audiofile["lyricist"] = metadata["artists"][0]["name"]
        audiofile["arranger"] = metadata["artists"][0]["name"]
        audiofile["performer"] = metadata["artists"][0]["name"]
        provider = metadata["provider"]
        audiofile["website"] = metadata["external_urls"][provider]
        audiofile["length"] = str(metadata["duration"])
        if metadata["publisher"]:
            audiofile["encodedby"] = metadata["publisher"]
        if metadata["external_ids"]["isrc"]:
            audiofile["isrc"] = metadata["external_ids"]["isrc"]
        audiofile.save(v2_version=3)

        # For supported id3 tags:
        # https://github.com/quodlibet/mutagen/blob/master/mutagen/id3/_frames.py
        # Each class represents an id3 tag
        audiofile = ID3(path)
        if metadata["year"]:
            audiofile["TORY"] = TORY(encoding=3, text=metadata["year"])
            audiofile["TYER"] = TYER(encoding=3, text=metadata["year"])
        if metadata["publisher"]:
            audiofile["TPUB"] = TPUB(encoding=3, text=metadata["publisher"])
        provider = metadata["provider"]
        audiofile["COMM"] = COMM(
            encoding=3, text=metadata["external_urls"][provider]
        )
        if metadata["lyrics"]:
            audiofile["USLT"] = USLT(
                encoding=3, desc=u"Lyrics", text=metadata["lyrics"]
            )
        if cached_albumart is None:
            cached_albumart = urllib.request.urlopen(
                metadata["album"]["images"][0]["url"]
            ).read()
            albumart.close()
        try:
            audiofile["APIC"] = APIC(
                encoding=3,
                mime="image/jpeg",
                type=3,
                desc=u"Cover",
                data=cached_albumart,
            )
        except IndexError:
            pass

        audiofile.save(v2_version=3)

    def as_m4a(self, path, metadata, cached_albumart=None):
        """ Embed metadata to M4A files. """
        logger.debug('Writing M4A metadata to "{path}".'.format(path=path))
        audiofile = MP4(path)
        self._embed_basic_metadata(audiofile, metadata, "m4a", preset=M4A_TAG_PRESET)
        if metadata["year"]:
            audiofile[M4A_TAG_PRESET["year"]] = metadata["year"]
        provider = metadata["provider"]
        audiofile[M4A_TAG_PRESET["comment"]] = metadata["external_urls"][provider]
        if metadata["lyrics"]:
            audiofile[M4A_TAG_PRESET["lyrics"]] = metadata["lyrics"]
        try:
            if cached_albumart is None:
                cached_albumart = urllib.request.urlopen(
                    metadata["album"]["images"][0]["url"]
                ).read()
                albumart.close()
            audiofile[M4A_TAG_PRESET["albumart"]] = [
                MP4Cover(cached_albumart, imageformat=MP4Cover.FORMAT_JPEG)
            ]
        except IndexError:
            pass

        audiofile.save()

    def as_flac(self, path, metadata, cached_albumart=None):
        logger.debug('Writing FLAC metadata to "{path}".'.format(path=path))
        audiofile = FLAC(path)
        self._embed_basic_metadata(audiofile, metadata, "flac")
        if metadata["year"]:
            audiofile["year"] = metadata["year"]
        provider = metadata["provider"]
        audiofile["comment"] = metadata["external_urls"][provider]
        if metadata["lyrics"]:
            audiofile["lyrics"] = metadata["lyrics"]

        image = Picture()
        image.type = 3
        image.desc = "Cover"
        image.mime = "image/jpeg"
        if cached_albumart is None:
            cached_albumart = urllib.request.urlopen(
                metadata["album"]["images"][0]["url"]
            ).read()
            albumart.close()
        image.data = cached_albumart
        audiofile.add_picture(image)

        audiofile.save()

    def _embed_basic_metadata(self, audiofile, metadata, encoding, preset=TAG_PRESET):
        audiofile[preset["artist"]] = metadata["artists"][0]["name"]
        if metadata["album"]["artists"][0]["name"]:
            audiofile[preset["albumartist"]] = metadata["album"]["artists"][0]["name"]
        if metadata["album"]["name"]:
            audiofile[preset["album"]] = metadata["album"]["name"]
        audiofile[preset["title"]] = metadata["name"]
        if metadata["release_date"]:
            audiofile[preset["date"]] = metadata["release_date"]
            audiofile[preset["originaldate"]] = metadata["release_date"]
        if metadata["genre"]:
            audiofile[preset["genre"]] = metadata["genre"]
        if metadata["copyright"]:
            audiofile[preset["copyright"]] = metadata["copyright"]
        if encoding == "flac":
            audiofile[preset["discnumber"]] = str(metadata["disc_number"])
        else:
            audiofile[preset["discnumber"]] = [(metadata["disc_number"], 0)]
        zfilled_track_number = str(metadata["track_number"]).zfill(len(str(metadata["total_tracks"])))
        if encoding == "flac":
            audiofile[preset["tracknumber"]] = zfilled_track_number
        else:
            if preset["tracknumber"] == TAG_PRESET["tracknumber"]:
                audiofile[preset["tracknumber"]] = "{}/{}".format(
                    zfilled_track_number, metadata["total_tracks"]
                )
            else:
                audiofile[preset["tracknumber"]] = [
                    (metadata["track_number"], metadata["total_tracks"])
                ]