#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# This file is part of snapcast
# Copyright (C) 2022-2024  Johannes Pohl
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

import sys
import re

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print(f"Usage: changelog_md2deb.py <changelog.md file>")
        sys.exit(1)

    with open(sys.argv[1], 'r') as file:
        data = file.read()

    # Remove '# Snapcast changelog'
    data = re.sub(r'^\s*# Snapcast changelog *\n*',
                  '', data, flags=re.MULTILINE)
    # Remove Contributors section
    data = re.sub(r'^\s*### Contributors *\n*( *-.*\n)*',
                  '', data, flags=re.MULTILINE)
    # Replace '### <text>' with '  * <text>'
    data = re.sub(r'^\s*### ([a-zA-Z]+) *\n',
                  r'\n  * \1\n', data, flags=re.MULTILINE)
    # Replace '## Version <ver>' with 'snapcast (<ver>-1) unstable; urgency=medium'
    data = re.sub(r'^\s*## Version\s+(\S*) *\n',
                  r'snapcast (\1-1) unstable; urgency=medium\n', data, flags=re.MULTILINE)
    # Replace bullets with '    -'
    data = re.sub(r'^\s*-\s*(.*) *\n', r'    -\1\n', data, flags=re.MULTILINE)
    data = re.sub(r'^_(.*)_ *\n', r' -- \1\n\n', data, flags=re.MULTILINE)

    print(data)