import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';

import 'package:archive/archive.dart';
import 'package:cookit/src/bundle/bundle_codec.dart';
import 'package:cookit/src/bundle/bundle_service.dart';
import 'package:cookit/src/database/database.dart';
import 'package:cookit/src/recipes/course_repository.dart';
import 'package:cookit/src/recipes/models/recipe.dart';
import 'package:cookit/src/recipes/photo_store.dart';
import 'package:cookit/src/recipes/recipe_repository.dart';
import 'package:cookit/src/recipes/unit_repository.dart';
import 'package:flutter_test/flutter_test.dart';

import '../support/fixtures.dart';
import '../support/test_database.dart';

class _App {
  _App(this.db, this.photos)
    : recipes = RecipeRepository(db, photos),
      courses = CourseRepository(db),
      units = UnitRepository(db) {
    bundles = BundleService(recipes, courses, units, photos, clock: () => testTime);
  }

  final AppDatabase db;
  final PhotoStore photos;
  final RecipeRepository recipes;
  final CourseRepository courses;
  final UnitRepository units;
  late final BundleService bundles;

  static Future<_App> create() async => _App(testDatabase(), await tempPhotoStore());

  Future<void> close() async {
    await db.close();
    await photos.directory.delete(recursive: true);
  }
}

Uint8List _zip(Map<String, List<int>> files) {
  final archive = Archive();
  files.forEach((name, bytes) => archive.add(ArchiveFile.bytes(name, bytes)));
  return ZipEncoder().encodeBytes(archive);
}

void main() {
  late _App source;
  late _App target;

  setUp(() async {
    source = await _App.create();
    target = await _App.create();
  });

  tearDown(() async {
    await source.close();
    await target.close();
  });

  test('export then import reproduces the collection with Photos and Courses', () async {
    final course = await source.courses.addCourse('Suppe', emoji: '🍲');
    final photo = await source.photos.saveBytes(Uint8List.fromList([9, 8, 7]));
    await source.recipes.saveRecipe(recipe(courseId: course.id, photos: [photo], favourite: true));
    await source.recipes.saveRecipe(recipe(id: 'r2', name: 'Brot'));

    final bytes = await source.bundles.exportBundle();
    final result = await target.bundles.importBundle(bytes);

    expect((result.added, result.skipped), (2, 0));
    final imported = (await target.recipes.watchRecipe('r1').first)!;
    expect(imported.favourite, isTrue);
    expect(imported.photos, hasLength(1));
    expect(await target.photos.read(imported.photos.single), [9, 8, 7]);
    final targetCourse = (await target.courses.allCourses()).firstWhere((c) => c.id == imported.courseId);
    expect(targetCourse.name, 'Suppe');
    expect(
      [for (final g in imported.ingredientGroups) g.toJson()],
      [for (final g in recipe().ingredientGroups) g.toJson()],
    );
  });

  test('own units travel with the export and are created on import', () async {
    final cube = await source.units.addOwn('Würfel');
    await source.units.setDirect(cube.key, false);
    await source.recipes.saveRecipe(
      recipe(
        ingredientGroups: [
          IngredientGroup(
            lines: [IngredientLine(amount: 2, unitKey: cube.key, name: 'Brühe')],
          ),
        ],
      ),
    );

    await target.bundles.importBundle(await source.bundles.exportBundle());

    final imported = (await target.units.allUnits()).firstWhere((u) => u.key == cube.key);
    expect((imported.label, imported.direct, imported.builtIn), ('Würfel', false, false));
    final line = (await target.recipes.getRecipe('r1'))!.ingredientGroups.single.lines.single;
    expect(line.unitKey, cube.key);
  });

  test('importing again skips Recipes that are already there', () async {
    await source.recipes.saveRecipe(recipe());
    final bytes = await source.bundles.exportBundle();
    await target.bundles.importBundle(bytes);
    final again = await target.bundles.importBundle(bytes);
    expect((again.added, again.skipped), (0, 1));
    expect(await target.recipes.allRecipes(), hasLength(1));
  });

  test('a Course named like an existing one is reused', () async {
    final manifest = BundleCodec.encodeManifest([
      BundleCodec.encodeRecipe(recipe(), courseName: 'Dessert', photoPaths: const []),
    ], createdAt: testTime);
    await target.bundles.importBundle(_zip({'bundle.json': utf8.encode(jsonEncode(manifest))}));
    final courses = await target.courses.allCourses();
    expect(courses.where((c) => c.name == 'Dessert'), hasLength(1));
    expect((await target.recipes.allRecipes()).single.courseId, courses.firstWhere((c) => c.name == 'Dessert').id);
  });

  test('rejects files that are not Recipe Bundles', () async {
    expect(
      () => target.bundles.importBundle(Uint8List.fromList(utf8.encode('hello'))),
      throwsA(isA<BundleFormatException>()),
    );
    expect(
      () => target.bundles.importBundle(
        _zip({
          'other.txt': [1],
        }),
      ),
      throwsA(isA<BundleFormatException>()),
    );
    expect(
      () => target.bundles.importBundle(
        _zip({
          'bundle.json': utf8.encode(jsonEncode({'format': 'cookit.recipe-bundle', 'version': 99, 'recipes': []})),
        }),
      ),
      throwsA(isA<BundleFormatException>()),
    );
  });

  // Contract test against the Excel converter's real output, when it has been generated.
  final converted = File('tools/excel-import/out/cookit-rezepte.zip');
  test(
    'imports the converted Excel workbook',
    () async {
      final result = await target.bundles.importBundle(await converted.readAsBytes());
      expect(result.added, greaterThan(200));
      final all = await target.recipes.allRecipes();
      final focaccia = all.firstWhere((r) => r.name == 'Focaccia');
      expect(focaccia.stepSections.map((s) => s.title).take(2), ['Vorteig', 'Teig']);
      final shake = all.firstWhere((r) => r.name == 'Melonen-Minze-Shake');
      expect(shake.photos, hasLength(3));
      expect(target.photos.file(shake.photos.first).existsSync(), isTrue);
      expect(all.where((r) => r.needsReview), isNotEmpty);
    },
    skip: converted.existsSync() ? false : 'run tools/excel-import/convert.py first',
    timeout: const Timeout(Duration(minutes: 2)),
  );
}