#!/usr/bin/env python3

"""Converts a CUE file to the meta format expected by aNONradio."""

# Copyright (c) 2022 Mark Cornick
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import re
import sys

cue_file = sys.argv[1]
meta_file = re.sub(r"cue$", "meta", cue_file)

try:
    with open(cue_file) as f:
        cue = f.readlines()
except FileNotFoundError:
    sys.stderr.write("{} not found\n".format(cue_file))
    sys.exit(1)
except IsADirectoryError:
    sys.stderr.write("{} is a directory\n".format(cue_file))
    sys.exit(1)
except PermissionError:
    sys.stderr.write("No permission to read {}\n".format(cue_file))
    sys.exit(1)
except OSError:
    sys.stderr.write("OS error trying to read {}\n".format(cue_file))
    sys.exit(1)

title = None
performer = None
timestamp = None

try:
    with open(meta_file, "w") as f:
        for line in cue:
            title_re = re.search(r'^    TITLE "(.*)"$', line)
            performer_re = re.search(r'^    PERFORMER "(.*)"$', line)
            index_re = re.search(r"^    INDEX 01 (.*)$", line)
            if title_re:
                title = title_re[1]
            if performer_re:
                performer = performer_re[1]
            if index_re:
                time_re = re.search(r"^(..):(..):..$", index_re[1])
                timestamp = "00{}{}".format(time_re[1], time_re[2])
            if title and performer and timestamp:
                f.write("{}:{} - {}\n".format(timestamp, performer, title))
                title = None
                performer = None
                timestamp = None
except IsADirectoryError:
    sys.stderr.write("{} is a directory\n".format(meta_file))
    sys.exit(1)
except PermissionError:
    sys.stderr.write("No permission to write {}\n".format(meta_file))
    sys.exit(1)
except OSError:
    sys.stderr.write("OS error trying to write {}\n".format(meta_file))
    sys.exit(1)