"""Audio File Constants"""
# All known formats
WAVE_PCM_FORMAT = 'WAV'
FLAC_FORMAT = 'FLAC'
WAVEX_FORMAT = 'WAVEX'
AIFF_FORMAT = 'AIFF'
WAVEFLOAT_FORMAT = 'FLOAT'

# All known subtypes
PCM_32_SUBTYPE = 'PCM_32'
PCM_24_SUBTYPE = 'PCM_24'
PCM_16_SUBTYPE = 'PCM_16'

# All known channels
STEREO = 2

# All known samplerates
CD_AUDIO = 44100
DAT_AUDIO = 48000
HD_AUDIO = 96000
HDCD_AUDIO = 176400
PRO_AUDIO = 192000

# File Extensions
WAV_FILE_EXT = 'wav'
FLAC_FILE_EXT = 'flac'

# Acceptable file extensions
VALID_EXTENSIONS = [
    WAV_FILE_EXT,
    FLAC_FILE_EXT
]

GOOD_SAMPLERATES = {
    PCM_16_SUBTYPE: [
        CD_AUDIO,
        DAT_AUDIO
    ],
    PCM_24_SUBTYPE: [
        CD_AUDIO,
        DAT_AUDIO,
        HD_AUDIO,
        HDCD_AUDIO,
        PRO_AUDIO
    ]
}
# Samplerates accepted for 16-bit audio
GOOD_16_SAMPLERATES = [
    CD_AUDIO,
    DAT_AUDIO
]

# Samplerates accepted for 24-bit audio
GOOD_24_SAMPLERATES = [
    CD_AUDIO,
    DAT_AUDIO,
    HD_AUDIO,
    HDCD_AUDIO,
    PRO_AUDIO
]

# Acceptable audio containers - These definitely work.
GOOD_FORMATS = [
    WAVE_PCM_FORMAT,
    FLAC_FORMAT
]

# We include BAD_FORMATS instead of just the inverse"not GOOD_FORMATS", as we
# don't want to automatically exclude a "maybe it works" type of file.
#
# Explicitly bad audio containers - Auto re-encode
BAD_FORMATS = [
    WAVEX_FORMAT,
    AIFF_FORMAT
]

# Acceptable WAV/Flac Subtypes
GOOD_SUBTYPES = [
    PCM_16_SUBTYPE,
    PCM_24_SUBTYPE
]

# Acceptable numbers of channels
GOOD_CHANNELS = [
    STEREO
]

def good_audio_specs():
    """Present the list of good audio specs."""
    good_spec_list = []
    for f in GOOD_FORMATS:
        for t in GOOD_SUBTYPES:
            for r in GOOD_SAMPLERATES[t]:
                for c in GOOD_CHANNELS:
                    good_spec_list.append((f, t, r, c))

    return good_spec_list


# Files with these combinations bypass all transcoding in audio_spec_check().
GOOD_AUDIO_SPECS = good_audio_specs()
# [
#     (WAVE_PCM_FORMAT, PCM_16_SUBTYPE, CD_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_16_SUBTYPE, DAT_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_24_SUBTYPE, CD_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_24_SUBTYPE, DAT_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_24_SUBTYPE, HD_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_24_SUBTYPE, HDCD_AUDIO, STEREO),
#     (WAVE_PCM_FORMAT, PCM_24_SUBTYPE, PRO_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_16_SUBTYPE, CD_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_16_SUBTYPE, DAT_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_24_SUBTYPE, CD_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_24_SUBTYPE, DAT_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_24_SUBTYPE, HD_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_24_SUBTYPE, HDCD_AUDIO, STEREO),
#     (FLAC_FORMAT, PCM_24_SUBTYPE, PRO_AUDIO, STEREO),
# ]

NEW_ROOT_SUBFOLDER = 'transcoded_bulk_assets'


if __name__ == '__main__':
    print(good_audio_specs())