# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 Philipp Wolfer
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

PLUGIN_NAME = 'Tagger script format helper functions'
PLUGIN_AUTHOR = 'Philipp Wolfer'
PLUGIN_DESCRIPTION = 'A collection of useful functions to deal with file formats.'
PLUGIN_VERSION = "0.2"
PLUGIN_API_VERSIONS = ["1.3.0", "2.0", "2.1", "2.2"]

from picard.script import register_script_function

LOSSLESS_EXTENSIONS = ['flac', 'oggflac', 'ape', 'ofr', 'tak', 'wv', 'tta']


def is_lossless(parser):
    """
    Returns true, if the file processed is a lossless audio format.
    Note: This depends mainly on the file extension and does not look inside
    the file to detect the codec.
    """
    if parser.context['~extension'] in LOSSLESS_EXTENSIONS:
        return "1"
    elif parser.context['~extension'] == 'm4a':
        # Mutagen < 1.26 fails to detect the bitrate
        # for Apple Lossless Audio Codec.
        if not parser.context['~bitrate'] or float(parser.context['~bitrate']) > 1000:
            return "1"
        else:
            return ""
    else:
        return ""


def is_lossy(parser):
    """Returns true, if the file processed is a lossy audio format."""
    if is_lossless(parser) == "1":
        return ""
    else:
        return "1"


register_script_function(is_lossless)
register_script_function(is_lossy)
