// The age writer against Go, in the other direction: the files that this
// library writes, opened by Go. test/vectors/age_interop.json holds the
// recipes of test/age_interop_support.dart, the files that this library
// wrote from them with SeededRandomSource (their length and SHA-256, and
// their bytes when small) and what filippo.io/age and agewrap made of each
// with each opener (tool/age_interop_go_verdicts.go). Here each file is
// written again from its recipe and must be the one that Go read; Go
// opened it to the plaintext of the recipe, or refused it where the recipe
// expects a refusal; and this library makes the same of it as Go: the same
// plaintext or the same error text, and the same stanza rules. The vectors
// come from a Dart constant, so that this also runs compiled to
// JavaScript, without the expensive samples.

import 'dart:convert';

import 'package:datekeys/datekeys.dart';
import 'package:datekeys/src/age.dart';
import 'package:datekeys/src/agewrap.dart';
import 'package:datekeys/src/sha256.dart';
import 'package:test/test.dart';

import 'age_interop_support.dart';
import 'age_writer_support.dart';
import 'vectors/age_interop.g.dart';

final Json vectors = jsonDecode(ageInteropJson) as Json;

const recipeKeys = [
  'name',
  'seed',
  'recipients',
  'inner',
  'length',
  'pieces',
  'node',
  'openers',
];

Json recipe(Json s) => {
  for (final k in recipeKeys)
    if (s.containsKey(k)) k: s[k],
};

String rule(void Function() f) {
  try {
    f();
    return 'ok';
  } on DateKeysException catch (e) {
    return e.message;
  }
}

void main() {
  final samples = listOf(vectors['samples']);

  test('the recipes are those that the tool writes', () {
    expect(jsonDecode(jsonEncode(interopSamples())), samples.map(recipe));
  });

  for (final s in samples.where((s) => !isWeb || s['node'] != false)) {
    test(s['name'], () {
      final file = writeSample(s);
      expect(file.length, s['file_length']);
      expect(toHex(sha256(file)), s['file_sha256']);
      if (s['file'] != null) expect(toHex(file), s['file']);
      final header = parseAgeHeader(file);
      expect(header.length, s['header_length']);
      final stanzas = header.stanzas;
      expect([for (final st in stanzas) st.type], s['stanzas']);

      // Go opened it to the plaintext of the recipe with some opener, and
      // this library makes of it what Go made with each.
      final plain = toHex(sha256(finalPlaintext(s)));
      final openers = listOf(s['openers']);
      final verdicts = listOf(s['verdicts']);
      expect(verdicts, hasLength(openers.length));
      expect(verdicts.where((v) => v['error'] == null), isNotEmpty);
      for (var i = 0; i < openers.length; i++) {
        final v = verdicts[i];
        if (v['error'] == null) expect(v['plaintext_sha256'], plain);
        expect(openWith(file, openers[i]), v, reason: 'opener $i');
      }

      // The stanza rules of agewrap, as Go applied them.
      final q = quicknet();
      expect({
        'payload': rule(() => checkPayloadStanzas(stanzas)),
        'access_0': rule(() => checkAccessStanzas(stanzas, 0)),
        'access_16': rule(() => checkAccessStanzas(stanzas, accessSlots)),
        'time_1000': rule(
          () => checkTimeStanzas(
            stanzas,
            round: 1000,
            chainHashHex: q.chainHashHex,
            profileId: q.id,
          ),
        ),
      }, s['rules']);
    });
  }
}