# SPDX-License-Identifier: MIT
# (c) 2023 knuxify and Ear Tag contributors

from gi.repository import GObject
import magic
import mimetypes

import mutagen.id3
from mutagen.id3 import PictureType

from .file import CoverType
from .file_mutagen_common import EartagFileMutagenCommon

# These are copied from the code for Mutagen's EasyID3 functions:
KEY_TO_FRAME = {
    "album": "TALB",
    "bpm": "TBPM",
    "compilation": "TCMP",
    "composer": "TCOM",
    "copyright": "TCOP",
    "encodedby": "TENC",
    "genre": "TCON",
    "lyricist": "TEXT",
    "length": "TLEN",
    "media": "TMED",
    "mood": "TMOO",
    "grouping": "TIT1",
    "title": "TIT2",
    "version": "TIT3",
    "artist": "TPE1",
    "albumartist": "TPE2",
    "conductor": "TPE3",
    "arranger": "TPE4",
    "discnumber": "TPOS",
    "publisher": "TPUB",
    "tracknumber": "TRCK",
    "totaltracknumber": "TRCK",
    "author": "TOLY",
    "albumartistsort": "TSO2",
    "albumsort": "TSOA",
    "composersort": "TSOC",
    "artistsort": "TSOP",
    "titlesort": "TSOT",
    "isrc": "TSRC",
    "discsubtitle": "TSST",
    "language": "TLAN",
    "comment": "COMM::eng",
    "url": "WXXX:",
}

KEY_TO_FRAME_CLASS = {
    "album": mutagen.id3.TALB,
    "bpm": mutagen.id3.TBPM,
    "compilation": mutagen.id3.TCMP,
    "composer": mutagen.id3.TCOM,
    "copyright": mutagen.id3.TCOP,
    "encodedby": mutagen.id3.TENC,
    "lyricist": mutagen.id3.TEXT,
    "length": mutagen.id3.TLEN,
    "media": mutagen.id3.TMED,
    "mood": mutagen.id3.TMOO,
    "grouping": mutagen.id3.TIT1,
    "title": mutagen.id3.TIT2,
    "version": mutagen.id3.TIT3,
    "artist": mutagen.id3.TPE1,
    "albumartist": mutagen.id3.TPE2,
    "conductor": mutagen.id3.TPE3,
    "arranger": mutagen.id3.TPE4,
    "discnumber": mutagen.id3.TPOS,
    "publisher": mutagen.id3.TPUB,
    "tracknumber": mutagen.id3.TRCK,
    "author": mutagen.id3.TOLY,
    "albumartistsort": mutagen.id3.TSO2,
    "albumsort": mutagen.id3.TSOA,
    "composersort": mutagen.id3.TSOC,
    "artistsort": mutagen.id3.TSOP,
    "titlesort": mutagen.id3.TSOT,
    "isrc": mutagen.id3.TSRC,
    "discsubtitle": mutagen.id3.TSST,
    "language": mutagen.id3.TLAN,
    "comment": mutagen.id3.COMM,
    "url": mutagen.id3.WXXX,
}

FREEFORM_KEYS = {
    "musicbrainz_artistid": "MusicBrainz Artist Id",
    "musicbrainz_albumid": "MusicBrainz Album Id",
    "musicbrainz_albumartistid": "MusicBrainz Album Artist Id",
    "musicbrainz_trackid": "MusicBrainz Release Track Id",
    "musicbrainz_releasegroupid": "MusicBrainz Release Group Id",
}


class EartagFileMutagenID3(EartagFileMutagenCommon):
    """EartagFile handler that uses mutagen for ID3 support."""

    __gtype_name__ = "EartagFileMutagenID3"
    _supports_album_covers = True
    _supports_full_dates = True

    supported_extra_tags = (
        "bpm", "compilation", "composer", "copyright", "encodedby",
        "mood", "conductor", "arranger", "discnumber", "publisher",
        "isrc", "language", "discsubtitle", "url",

        "albumartistsort", "albumsort", "composersort", "artistsort",
        "titlesort",

        "musicbrainz_artistid", "musicbrainz_albumid",
        "musicbrainz_albumartistid", "musicbrainz_trackid",
        "musicbrainz_recordingid", "musicbrainz_releasegroupid"
    )  # fmt: skip

    def load_from_file(self, path):
        super().load_from_file(path)
        if not self.mg_file.tags:
            try:
                self.mg_file.add_tags()
            except (mutagen.id3._util.error, mutagen.wave.error):
                pass
        self.load_cover()
        self.setup_present_extra_tags()
        self.setup_original_values()

        # Work around ID3v1 handling issues. Mutagen assumes ID3v1.1, which
        # uses the last bit of the comment field as a track number. There
        # doesn't seem to be a way to check if a file is ID3v1 or ID3v1.1,
        # but we can make an educated guess based on the length of the ID3v1
        # comment field - if it goes the entire 29 characters, then it's
        # fairly likely to be 30 characters long.
        #
        # (I assume, by the extremely vague description of the header on
        # id3.org, that an ID3v1 comment field would go up to 28 characters,
        # as the last bit would be 0 (tags are supposed to end with 0s)...)

        if (
            "COMM:ID3v1 Comment:eng" in self.mg_file.tags
            and len(self.mg_file.tags["COMM:ID3v1 Comment:eng"].text[0]) == 29
        ):
            self.set_tag("tracknumber", "")

    def get_tag(self, tag_name):
        """Gets a tag's value using the KEY_TO_FRAME list as a guideline."""
        tag_name = tag_name.lower()

        if tag_name in KEY_TO_FRAME:
            try:
                return self.mg_file.tags[KEY_TO_FRAME[tag_name]].text[0]
            except KeyError:
                return ""
        elif tag_name in FREEFORM_KEYS:
            try:
                return self.mg_file.tags["TXXX:" + FREEFORM_KEYS[tag_name]].text[0]
            except KeyError:
                return ""
        elif tag_name == "musicbrainz_recordingid":
            for key, frame in list(self.mg_file.tags.items()):
                if frame.FrameID == "UFID" and frame.owner == "http://musicbrainz.org":
                    return self.mg_file.tags[key].data.decode("ascii", "ignore")
            return ""

        raise ValueError

    def set_tag(self, tag_name, value):
        """Sets a tag's value using the KEY_TO_FRAME list as a guideline."""
        tag_name = tag_name.lower()

        if tag_name in KEY_TO_FRAME:
            frame_name = KEY_TO_FRAME[tag_name.lower()]
            frame_class = KEY_TO_FRAME_CLASS[tag_name.lower()]

            # For float values that do not have numbers after the decimal point,
            # trim the trailing .0
            if tag_name in self.float_properties and value % 1 == 0:
                stringified = str(int(value))
            else:
                stringified = str(value)

            self.mg_file.tags.setall(
                frame_name, [frame_class(encoding=3, text=[stringified])]
            )
        elif tag_name in FREEFORM_KEYS:
            txxx = mutagen.id3.TXXX(
                encoding=3, desc=FREEFORM_KEYS[tag_name], text=[value]
            )
            self.mg_file.tags.setall("TXXX:" + FREEFORM_KEYS[tag_name], [txxx])
        elif tag_name == "musicbrainz_recordingid":
            ufid = mutagen.id3.UFID(
                owner="http://musicbrainz.org", data=bytes(value, "ascii")
            )
            self.mg_file.tags.add(ufid)
        else:
            raise ValueError

    def has_tag(self, tag_name):
        """
        Returns True or False based on whether the tag with the given name is
        present in the file.
        """
        if not self.mg_file.tags:
            return False
        if tag_name == "totaltracknumber":
            return bool(self.totaltracknumber)
        elif tag_name == "releasedate":
            return "TDRC" in self.mg_file.tags or "TDOR" in self.mg_file.tags
        elif tag_name == "url":
            return bool(self.props.url)
        elif tag_name == "comment":
            return bool(self.props.comment)
        elif tag_name in KEY_TO_FRAME:
            frame_name = KEY_TO_FRAME[tag_name.lower()]
            return frame_name in self.mg_file.tags
        elif tag_name in FREEFORM_KEYS:
            return "TXXX:" + FREEFORM_KEYS[tag_name] in self.mg_file.tags
        elif tag_name == "musicbrainz_recordingid":
            for key, frame in list(self.mg_file.tags.items()):
                if frame.FrameID == "UFID" and frame.owner == "http://musicbrainz.org":
                    return True
            return False

        return False

    def delete_tag(self, tag_name):
        """Deletes the tag with the given name from the file."""
        if tag_name.lower() == "releasedate":
            self.mg_file.tags.delall("TDRC")
            self.mg_file.tags.delall("TDOR")
            self._releasedate_cached = ""
        elif tag_name.lower() == "url":
            self.mg_file.tags.delall("WXXX")
            self.mg_file.tags.delall("WXXX:")
            self.mg_file.tags.delall("TXXX:purl")
        elif tag_name.lower() == "comment":
            self.mg_file.tags.delall("COMM::XXX")
            self.mg_file.tags.delall("COMM::eng")
            self.mg_file.tags.delall("TXXX:comment")
        elif tag_name.lower() in KEY_TO_FRAME:
            frame_name = KEY_TO_FRAME[tag_name.lower()]
            self.mg_file.tags.delall(frame_name)
        elif tag_name.lower() in FREEFORM_KEYS:
            self.mg_file.tags.delall("TXXX:" + FREEFORM_KEYS[tag_name.lower()])
        elif tag_name.lower() == "musicbrainz_recordingid":
            for key, frame in list(self.mg_file.tags.items()):
                if frame.FrameID == "UFID" and frame.owner == "http://musicbrainz.org":
                    del self.mg_file.tags[key]

        self.mark_as_modified(tag_name, notify_prop=True)

    def delete_cover(self, cover_type: CoverType, clear_only=False):
        """Delets the cover of the specified type from the file."""
        if cover_type == CoverType.FRONT:
            pictypes = (PictureType.OTHER, PictureType.COVER_FRONT)
        elif cover_type == CoverType.BACK:
            pictypes = (PictureType.COVER_BACK,)
        else:
            raise ValueError

        for tag in dict(self.mg_file.tags).copy().keys():
            if tag.startswith("APIC") and self.mg_file.tags[tag].type in pictypes:
                del self.mg_file.tags[tag]

        if not clear_only:
            self._cleanup_cover(cover_type)

    def on_remove(self, *args):
        super().on_remove()

    def set_cover_path(self, cover_type: CoverType, value):
        if not value:
            return self.delete_cover(cover_type)

        if cover_type == CoverType.FRONT:
            prop = "front_cover_path"
            self._front_cover_path = value
        elif cover_type == CoverType.BACK:
            prop = "back_cover_path"
            self._back_cover_path = value
        else:
            raise ValueError

        with open(value, "rb") as cover_file:
            data = cover_file.read()

        mime = magic.from_file(value, mime=True)

        # Remove conflicting covers
        self.delete_cover(cover_type, clear_only=True)

        if cover_type == CoverType.FRONT:
            self.mg_file.tags.add(
                mutagen.id3.APIC(
                    encoding=3,
                    desc="Front Cover",
                    mime=mime,
                    data=data,
                    type=PictureType.COVER_FRONT,
                )
            )

            self.mg_file.tags.add(
                mutagen.id3.APIC(
                    encoding=3,
                    desc="Cover",
                    mime=mime,
                    data=data,
                    type=PictureType.OTHER,
                )
            )

        elif cover_type == CoverType.BACK:
            self.mg_file.tags.add(
                mutagen.id3.APIC(
                    encoding=3,
                    desc="Back Cover",
                    mime=mime,
                    data=data,
                    type=PictureType.COVER_BACK,
                )
            )

        self.mark_as_modified(prop)

    def load_cover(self):
        """Loads the covers from the file and saves them to a temporary file."""
        front_picture = None
        back_picture = None

        pictures = self.mg_file.tags.getall("APIC")
        # Loop twice, first to get cover art (preferred), second to get "other"

        for picture in pictures:
            if picture.type == PictureType.COVER_FRONT:
                front_picture = picture
                break

        if not front_picture:
            for picture in pictures:
                if picture.type == PictureType.OTHER:
                    front_picture = picture
                    break

        if front_picture:
            cover_extension = mimetypes.guess_extension(front_picture.mime)
            self.create_cover_tempfile(
                CoverType.FRONT, front_picture.data, cover_extension
            )

        # Get back cover
        for picture in pictures:
            if picture.type == PictureType.COVER_BACK:
                back_picture = picture
                break

        if back_picture:
            cover_extension = mimetypes.guess_extension(back_picture.mime)
            self.create_cover_tempfile(
                CoverType.BACK, back_picture.data, cover_extension
            )

    @GObject.Property(type=int)
    def tracknumber(self):
        tracknum_raw = self.get_tag("tracknumber")
        if not tracknum_raw:
            return None

        if "/" in tracknum_raw:
            return int(tracknum_raw.split("/")[0])
        return int(tracknum_raw)

    @tracknumber.setter
    def tracknumber(self, value):
        if self.totaltracknumber:
            self.set_tag(
                "tracknumber",
                "{n}/{t}".format(n=str(value), t=str(self.totaltracknumber)),
            )
        else:
            if value:
                self.set_tag("tracknumber", value)
            elif self.has_tag("tracknumber"):
                self.delete_tag("tracknumber")
        self.mark_as_modified("tracknumber")

    @GObject.Property(type=int)
    def totaltracknumber(self):
        tracknum_raw = self.get_tag("tracknumber")
        if not tracknum_raw:
            return None

        if "/" in tracknum_raw:
            return int(tracknum_raw.split("/")[1])
        return None

    @totaltracknumber.setter
    def totaltracknumber(self, value):
        if self.tracknumber:
            self.set_tag(
                "tracknumber", "{n}/{t}".format(n=str(self.tracknumber), t=str(value))
            )
        else:
            if value:
                self.set_tag("tracknumber", "0/{t}".format(t=str(value)))
            elif self.has_tag("tracknumber"):
                self.delete_tag("tracknumber")
        self.mark_as_modified("totaltracknumber")

    @GObject.Property()
    def genre(self):
        if "TCON" not in self.mg_file.tags:
            return None
        genre_raw = self.mg_file.tags["TCON"]
        if genre_raw and genre_raw.genres:
            return genre_raw.genres[0]
        return None

    @genre.setter
    def genre(self, value):
        if value:
            try:
                genre_raw = self.mg_file.tags["TCON"]
            except KeyError:
                self.mg_file.tags.add(mutagen.id3.TCON(encoding=3, text=[value]))
            else:
                genre_raw.encoding = 3
                genre_raw.genres = [value]
        else:
            self.delete_tag("genre")
        self.mark_as_modified("genre")

    @GObject.Property()
    def comment(self):
        if "COMM::XXX" in self.mg_file.tags:
            return self.mg_file.tags["COMM::XXX"].text[0]
        elif "COMM::eng" in self.mg_file.tags:
            return self.mg_file.tags["COMM::eng"].text[0]
        elif "TXXX:comment" in self.mg_file.tags:
            return self.mg_file.tags["TXXX:comment"].text[0]
        return None

    @comment.setter
    def comment(self, value):
        if value:
            self.mg_file.tags.setall(
                "COMM",
                [mutagen.id3.COMM(encoding=3, lang="eng", desc="", text=[str(value)])],
            )
        else:
            self.delete_tag("comment")
        self.mark_as_modified("comment")

    # These set both TDRC (date) and TDOR (original date) for compatibility.
    @GObject.Property(type=str)
    def releasedate(self):
        if not self._releasedate_cached and self.has_tag("releasedate"):
            value = ""
            if "TDRC" in self.mg_file.tags:
                value = self.mg_file.tags["TDRC"].text[0].text
            elif "TDOR" in self.mg_file.tags:
                value = self.mg_file.tags["TDOR"].text[0].text
            self._releasedate_cached = value
        return self._releasedate_cached

    @releasedate.setter
    def releasedate(self, value):
        self.validate_date("releasedate", value)
        self._releasedate_cached = value
        if not value:
            self.delete_tag("releasedate")
        elif "releasedate" not in self._error_fields:
            self.mg_file.tags.setall(
                "TDRC", [mutagen.id3.TDRC(encoding=3, text=[str(value)])]
            )
            if (
                "TDOR" not in self.mg_file.tags
                or self.mg_file.tags["TDOR"] == self.mg_file.tags["TDRC"]
            ):
                self.mg_file.tags.setall(
                    "TDOR", [mutagen.id3.TDOR(encoding=3, text=[str(value)])]
                )
        self.mark_as_modified("releasedate")

    @GObject.Property(type=int)
    def discnumber(self):
        discnum_raw = self.get_tag("discnumber")
        if not discnum_raw:
            return None

        if "/" in discnum_raw:
            return int(discnum_raw.split("/")[0])
        return int(discnum_raw)

    @discnumber.setter
    def discnumber(self, value):
        if value:
            self.set_tag("discnumber", f"{value}/{value}")
        elif self.has_tag("discnumber"):
            self.delete_tag("discnumber")
        self.mark_as_modified("discnumber")

    @GObject.Property(type=str)
    def url(self):
        if "WXXX" in self.mg_file.tags:
            return self.mg_file.tags["WXXX"].url
        elif "WXXX:" in self.mg_file.tags:
            return self.mg_file.tags["WXXX:"].url
        elif "TXXX:purl" in self.mg_file.tags:
            return self.mg_file.tags["TXXX:purl"].text[0]
        return None

    @url.setter
    def url(self, value):
        if value:
            self.mg_file.tags.setall(
                "TXXX:purl",
                [mutagen.id3.TXXX(encoding=3, desc="purl", text=str(value))],
            )
            self.mg_file.tags.setall(
                "WXXX", [mutagen.id3.WXXX(encoding=3, desc="", url=str(value))]
            )
            self.mark_as_modified("url")
        else:
            self.delete_tag("url")
