#!/usr/bin/env python
# Copyright 2017 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 itertools
import json
import os
import sys

from sdk_common import Atom, detect_category_violations, detect_collisions, gather_dependencies


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--id',
                        help='The atom\'s identifier',
                        required=True)
    parser.add_argument('--out',
                        help='Path to the output file',
                        required=True)
    parser.add_argument('--depfile',
                        help='Path to the depfile',
                        required=True)
    parser.add_argument('--deps',
                        help='List of manifest paths for dependencies',
                        nargs='*')
    parser.add_argument('--file',
                        help='A (destination <-- source) mapping',
                        action='append',
                        nargs=2)
    parser.add_argument('--file-list',
                        help='A file containing destination=source mappings')
    parser.add_argument('--gn-label',
                        help='GN label of the atom',
                        required=True)
    parser.add_argument('--category',
                        help='Publication level',
                        required=True)
    parser.add_argument('--meta',
                        help='Path to the atom\'s metadata file in the SDK',
                        required=True)
    parser.add_argument('--type',
                        help='Type of the atom',
                        required=True)
    args = parser.parse_args()

    # Gather the definitions of other atoms this atom depends on.
    (deps, atoms) = gather_dependencies(args.deps)

    # Build the list of files making up this atom.
    extra_files = []
    if args.file_list:
        with open(args.file_list, 'r') as file_list_file:
            extra_files = [line.strip().split('=', 1)
                           for line in file_list_file.readlines()]
    files = dict(itertools.chain(args.file, extra_files))

    atoms.update([Atom({
        'id': args.id,
        'meta': args.meta,
        'gn-label': args.gn_label,
        'category': args.category,
        'deps': sorted(list(deps)),
        'files': [{'source': source, 'destination': destination}
                  for destination, source in files.iteritems()],
        'type': args.type,
    })])

    if detect_collisions(atoms):
        print('Name collisions detected!')
        return 1
    if detect_category_violations(args.category, atoms):
        print('Publication level violations detected!')
        return 1

    manifest = {
        'ids': [args.id],
        'atoms': map(lambda a: a.json, sorted(list(atoms))),
    }

    with open(os.path.abspath(args.out), 'w') as out:
        json.dump(manifest, out, indent=2, sort_keys=True,
                  separators=(',', ': '))

    with open(args.depfile, 'w') as dep_file:
        dep_file.write(args.out + ': ')
        for destination, source in extra_files:
            dep_file.write(source + ' ')


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