# Created By: Virgil Dupras
# Created On: 2009-10-23
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
#
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html

from hsaudiotag import auto
from hscommon.util import get_file_ext, format_size, format_time

from core.app import format_timestamp, format_perc, format_words, format_dupe_count
from core import fs

TAG_FIELDS = {
    'audiosize', 'duration', 'bitrate', 'samplerate', 'title', 'artist',
    'album', 'genre', 'year', 'track', 'comment'
}

class MusicFile(fs.File):
    INITIAL_INFO = fs.File.INITIAL_INFO.copy()
    INITIAL_INFO.update({
        'audiosize': 0,
        'bitrate': 0,
        'duration': 0,
        'samplerate': 0,
        'artist': '',
        'album': '',
        'title': '',
        'genre': '',
        'comment': '',
        'year': '',
        'track': 0,
    })
    __slots__ = fs.File.__slots__ + tuple(INITIAL_INFO.keys())

    @classmethod
    def can_handle(cls, path):
        if not fs.File.can_handle(path):
            return False
        return get_file_ext(path.name) in auto.EXT2CLASS

    def get_display_info(self, group, delta):
        size = self.size
        duration = self.duration
        bitrate = self.bitrate
        samplerate = self.samplerate
        mtime = self.mtime
        m = group.get_match_of(self)
        if m:
            percentage = m.percentage
            dupe_count = 0
            if delta:
                r = group.ref
                size -= r.size
                duration -= r.duration
                bitrate -= r.bitrate
                samplerate -= r.samplerate
                mtime -= r.mtime
        else:
            percentage = group.percentage
            dupe_count = len(group.dupes)
        dupe_folder_path = getattr(self, 'display_folder_path', self.folder_path)
        return {
            'name': self.name,
            'folder_path': str(dupe_folder_path),
            'size': format_size(size, 2, 2, False),
            'duration': format_time(duration, with_hours=False),
            'bitrate': str(bitrate),
            'samplerate': str(samplerate),
            'extension': self.extension,
            'mtime': format_timestamp(mtime, delta and m),
            'title': self.title,
            'artist': self.artist,
            'album': self.album,
            'genre': self.genre,
            'year': self.year,
            'track': str(self.track),
            'comment': self.comment,
            'percentage': format_perc(percentage),
            'words': format_words(self.words) if hasattr(self, 'words') else '',
            'dupe_count': format_dupe_count(dupe_count),
        }

    def _get_md5partial_offset_and_size(self):
        f = auto.File(str(self.path))
        return (f.audio_offset, f.audio_size)

    def _read_info(self, field):
        fs.File._read_info(self, field)
        if field in TAG_FIELDS:
            f = auto.File(str(self.path))
            self.audiosize = f.audio_size
            self.bitrate = f.bitrate
            self.duration = f.duration
            self.samplerate = f.sample_rate
            self.artist = f.artist
            self.album = f.album
            self.title = f.title
            self.genre = f.genre
            self.comment = f.comment
            self.year = f.year
            self.track = f.track