# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import argparse
import os
import shutil
import sys

from mozbuild.util import ensureParentDir


def main(argv):
    parser = argparse.ArgumentParser(description="Merge l10n files.")
    parser.add_argument("--output", help="Path to write merged output")
    parser.add_argument("--ref-file", help="Path to reference file (en-US)")
    parser.add_argument("--l10n-file", help="Path to locale file")

    args = parser.parse_args(argv)

    from compare_locales.compare import ContentComparer, Observer
    from compare_locales.paths import File

    cc = ContentComparer([Observer()])
    cc.compare(
        File(args.ref_file, args.ref_file, ""),
        File(args.l10n_file, args.l10n_file, ""),
        args.output,
    )

    ensureParentDir(args.output)
    if not os.path.exists(args.output):
        src = args.l10n_file
        if not os.path.exists(args.l10n_file):
            src = args.ref_file
        shutil.copy(src, args.output)

    return 0


if __name__ == "__main__":
    main(sys.argv[1:])