#!/usr/bin/env python
#
# Copyright 2017 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import os
import shutil
import sys
import tempfile


def run(command, extra_options=''):
    command = command + ' ' + extra_options
    print(command)
    ret = os.system(command)
    if ret != 0:
        raise OSError(ret)


def GenerateIdlBindings(_, __):
    bytecode_path = tempfile.mkdtemp('idl_bytecode')
    generator = 'components/cronet/tools/generators/cronet_bindings_generator.py'
    input_file = 'components/cronet/native/cronet.idl'
    # Precompile bindings templates
    run(generator + ' precompile -o ', bytecode_path)
    # Generate C interface.
    run(generator + ' --use_bundled_pylibs generate ' + input_file +
        ' --bytecode_path ' + bytecode_path + ' -g c')
    # TODO(mef): Use output_path to put generated code into
    # out/<blah>/gen/components/cronet/native directory.
    # -o ' + output_path)
    # Format generated code.
    run('git cl format --full components/cronet/native')
    shutil.rmtree(bytecode_path)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--output-path',
                        help='Output path for generated bindings')

    args, input_files = parser.parse_known_args()
    GenerateIdlBindings(args.output_path, input_files)


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