# 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/.

# ----------------------------------------------------------------------------
# This script checks encoding of the files that define JSErrorFormatStrings.
#
# JSErrorFormatString.format member should be in ASCII encoding.
# ----------------------------------------------------------------------------

import os
import sys

from mozversioncontrol import get_repository_from_env

scriptname = os.path.basename(__file__)
expected_encoding = "ascii"

# The following files don't define JSErrorFormatString.
ignore_files = [
    "dom/base/domerr.msg",
    "js/xpconnect/src/xpc.msg",
]


def log_pass(filename, text):
    print(f"TEST-PASS | {scriptname} | {filename} | {text}")


def log_fail(filename, text):
    print(f"TEST-UNEXPECTED-FAIL | {scriptname} | {filename} | {text}")


def check_single_file(filename):
    with open(filename, "rb") as f:
        data = f.read()
        try:
            data.decode(expected_encoding)
        except Exception:
            log_fail(filename, f"not in {expected_encoding} encoding")

    log_pass(filename, "ok")
    return True


def check_files():
    result = True

    with get_repository_from_env() as repo:
        root = repo.path

        for filename, _ in repo.get_tracked_files_finder().find("**/*.msg"):
            if filename not in ignore_files:
                if not check_single_file(os.path.join(root, filename)):
                    result = False

    return result


def main():
    if not check_files():
        sys.exit(1)

    sys.exit(0)


if __name__ == "__main__":
    main()
