#!/usr/bin/env python3
"""Preserve the single nested Git source referenced by the collected FreeType tree."""
import argparse
import configparser
import json
from pathlib import Path

from collect_pdfium import ROOT, collect, run, save, sha


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('--output', type=Path, required=True)
    parser.add_argument('--cache', type=Path, default=ROOT / '.deps/source-archives/pdfium-gitlink')
    args = parser.parse_args()
    output, cache = args.output.resolve(), args.cache.resolve()
    if not output.is_relative_to(ROOT) or not cache.is_relative_to(ROOT):
        parser.error('Output/cache must be inside the workspace')
    collection = ROOT / 'tests/results/source-archives/pdfium-git/report.json'
    report = json.loads(collection.read_text())
    if not report['success']:
        raise ValueError('Verified parent collection required')
    parent = next(item for item in report['repositories'] if item['path'] == 'third_party/freetype/src')
    links = [(item['path'], link) for item in report['repositories'] for link in item['gitlinks']]
    if (len(links) != 1 or links[0][0] != parent['path'] or links[0][1]['path'] != 'subprojects/dlg'
            or links[0][1]['gitObject'] != '395ccad2c1e0daae535c4d20bb0a3f2424648e17'):
        raise ValueError('Unreviewed nested Git source')
    config = run(ROOT / parent['repository'], ['show', parent['revision'] + ':.gitmodules'])
    config.check_returncode()
    modules = configparser.ConfigParser(interpolation=None)
    modules.read_string(config.stdout.decode())
    source = modules['submodule "dlg"']
    if source['path'] != 'subprojects/dlg' or source['url'] != 'https://github.com/nyorain/dlg.git':
        raise ValueError('Unexpected pinned .gitmodules mapping')
    output.mkdir(parents=True, exist_ok=False); cache.mkdir(parents=True, exist_ok=True)
    (output / 'freetype.gitmodules').write_bytes(config.stdout)
    item = {'path': parent['path'] + '/' + source['path'], 'url': source['url'],
            'revision': links[0][1]['gitObject'], 'condition': 'Referenced by collected FreeType gitlink'}
    result = collect(item, cache, output)
    success = result['success'] and not result.get('gitlinks')
    save(output / 'report.json', {'success': success, 'collectorSha256': sha(Path(__file__)),
         'parentCollectionSha256': sha(collection), 'parentRevision': parent['revision'],
         'gitmodulesSha256': sha(output / 'freetype.gitmodules'), 'repositories': [result],
         'scope': 'Nested source preserved, not evidence that dlg is linked into the distributed PDFium. '
                  'No source/build scripts or hooks executed.'})
    return 0 if success else 1


if __name__ == '__main__':
    raise SystemExit(main())