#!/usr/bin/env python3
# Copyright 2020 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Writes a dummy R.java file from a list of R.txt files."""

import argparse
import sys

from util import build_utils
from util import resource_utils
import action_helpers  # build_utils adds //build to sys.path.


def _ConcatRTxts(rtxt_in_paths, combined_out_path):
    all_lines = set()
    for rtxt_in_path in rtxt_in_paths:
        with open(rtxt_in_path, encoding='utf-8') as rtxt_in:
            all_lines.update(rtxt_in.read().splitlines())
    with open(combined_out_path, 'w', encoding='utf-8') as combined_out:
        combined_out.write('\n'.join(sorted(all_lines)))


def _CreateRJava(rtxts, package_name, srcjar_out):
    with resource_utils.BuildContext() as build:
        _ConcatRTxts(rtxts, build.r_txt_path)
        rjava_build_options = resource_utils.RJavaBuildOptions()
        rjava_build_options.ExportAllResources()
        rjava_build_options.ExportAllStyleables()
        rjava_build_options.GenerateOnResourcesLoaded(fake=True)
        resource_utils.CreateRJavaFiles(
            srcjar_out,
            srcjar_out,
            package_name,
            build.r_txt_path,
            [],
            rjava_build_options,
            ignore_mismatched_values=True,
        )


def main(args):
    parser = argparse.ArgumentParser(description='Create an R.java srcjar.')
    action_helpers.add_depfile_arg(parser)
    parser.add_argument(
        '--srcjar-out', required=True, help='Path to output srcjar.'
    )
    parser.add_argument(
        '--deps-rtxts',
        required=True,
        help='List of rtxts of resource dependencies.',
    )
    parser.add_argument(
        '--r-package', required=True, help='R.java package to use.'
    )
    options = parser.parse_args(build_utils.ExpandFileArgs(args))
    options.deps_rtxts = action_helpers.parse_gn_list(options.deps_rtxts)

    _CreateRJava(options.deps_rtxts, options.r_package, options.srcjar_out)
    action_helpers.write_depfile(
        options.depfile, options.srcjar_out, inputs=options.deps_rtxts
    )


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