#!/usr/bin/env python3

# Copyright 2022 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Generates APKs for use on system images."""

import argparse
import os
import pathlib
import tempfile
import shutil
import sys
import zipfile

_DIR_SOURCE_ROOT = str(pathlib.Path(__file__).parents[2])
sys.path.append(os.path.join(_DIR_SOURCE_ROOT, 'build', 'android', 'gyp'))
from util import build_utils


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--input', required=True, help='Input path')
    parser.add_argument('--output', required=True, help='Output path')
    parser.add_argument('--bundle-wrapper', help='APK operations script path')
    parser.add_argument(
        '--fuse-apk',
        help='Create single .apk rather than using apk splits',
        action='store_true',
    )
    args = parser.parse_args()

    if not args.bundle_wrapper:
        shutil.copyfile(args.input, args.output)
        return

    with tempfile.NamedTemporaryFile(suffix='.apks') as tmp_file:
        cmd = [
            args.bundle_wrapper,
            'build-bundle-apks',
            '--output-apks',
            tmp_file.name,
        ]
        cmd += ['--build-mode', 'system' if args.fuse_apk else 'system_apks']

        # Creates a .apks zip file that contains the system image APK(s).
        build_utils.CheckOutput(cmd)

        if args.fuse_apk:
            with zipfile.ZipFile(tmp_file.name) as z:
                pathlib.Path(args.output).write_bytes(
                    z.read('system/system.apk')
                )
            return

        # A single .apk file means a bundle where we take only the base split.
        if args.output.endswith('.apk'):
            with zipfile.ZipFile(tmp_file.name) as z:
                pathlib.Path(args.output).write_bytes(
                    z.read('splits/base-master.apk')
                )
            return

        # Use the full .apks.
        shutil.copyfile(tmp_file.name, args.output)


if __name__ == '__main__':
    sys.exit(main())