#!/usr/bin/env python
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import json
import os
import sys


def main():
    parser = argparse.ArgumentParser('Builds a metadata file')
    parser.add_argument('--out',
                        help='Path to the output file',
                        required=True)
    parser.add_argument('--name',
                        help='Name of the library',
                        required=True)
    parser.add_argument('--root',
                        help='Root of the library in the SDK',
                        required=True)
    parser.add_argument('--deps',
                        help='Path to metadata files of dependencies',
                        nargs='*')
    parser.add_argument('--headers',
                        help='List of public headers',
                        nargs='*')
    parser.add_argument('--include-dir',
                        help='Path to the include directory',
                        required=True)
    parser.add_argument('--arch',
                        help='Name of the target architecture',
                        required=True)
    parser.add_argument('--lib-link',
                        help='Path to the link-time library',
                        required=True)
    parser.add_argument('--lib-dist',
                        help='Path to the library to add to Fuchsia packages',
                        required=True)
    parser.add_argument('--lib-debug',
                        help='Path to the debug version of the library',
                        required=True)
    args = parser.parse_args()

    metadata = {
        'type': 'cc_prebuilt_library',
        'name': args.name,
        'root': args.root,
        'format': 'shared',
        'headers': args.headers,
        'include_dir': args.include_dir,
    }
    metadata['binaries'] = {
        args.arch: {
            'link': args.lib_link,
            'dist': args.lib_dist,
            'debug': args.lib_debug,
        },
    }

    deps = []
    fidl_deps = []
    for spec in args.deps:
        with open(spec, 'r') as spec_file:
            data = json.load(spec_file)
        type = data['type']
        name = data['name']
        # TODO(DX-340): verify that source libraries are header-only.
        if type == 'cc_source_library' or type == 'cc_prebuilt_library':
            deps.append(name)
        else:
            raise Exception('Unsupported dependency type: %s' % type)
    metadata['deps'] = deps

    with open(args.out, 'w') as out_file:
        json.dump(metadata, out_file, indent=2, sort_keys=True)

    return 0


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