import 'dart:io';

import 'package:test/test.dart';

import '../tool/src/check_files.dart';

void main() {
  test("our own Dart files are formatted: the apps', the shared packages', the "
      "tools'", () {
    for (final path in [
      'apps/learn/halkyon_learn_flutter/lib/main.dart',
      'apps/learn/halkyon_learn_server/lib/server.dart',
      'apps/learn/halkyon_learn_server/test/integration/auth/account_test.dart',
      'apps/todo/halkyon_todo_flutter/lib/main.dart',
      'packages/halkyon_app/lib/halkyon_app.dart',
      'packages/halkyon_base_server/lib/src/auth/email.dart',
      // SRP's client half, written by hand beside the module's generated
      // client, and its tests.
      'packages/halkyon_base_client/lib/srp.dart',
      'packages/halkyon_base_client/lib/src/srp/srp_client.dart',
      'packages/halkyon_base_client/test/srp_client_test.dart',
      'packages/halkyon_keys/lib/src/account_keys.dart',
      'tool/check.dart',
    ]) {
      expect(isOwnDartFile(path), isTrue, reason: path);
    }
  });

  test('what a generator writes is left as it wrote it', () {
    for (final path in [
      // The client packages, Serverpod's from top to bottom, but for the
      // module's SRP.
      'apps/learn/halkyon_learn_client/lib/src/protocol/client.dart',
      'apps/todo/halkyon_todo_client/lib/halkyon_todo_client.dart',
      'packages/halkyon_base_client/lib/src/protocol/protocol.dart',
      'packages/halkyon_base_client/lib/halkyon_base_client.dart',
      // A server's generated sources and test tools.
      'apps/learn/halkyon_learn_server/lib/src/generated/protocol.dart',
      'packages/halkyon_base_server/lib/src/generated/endpoints.dart',
      'apps/learn/halkyon_learn_server/test/integration/test_tools/serverpod_test_tools.dart',
      // gen-l10n's localizations, the app's and the shared packages'.
      'apps/learn/halkyon_learn_flutter/lib/l10n/app_localizations.dart',
      'apps/learn/halkyon_learn_flutter/lib/l10n/app_localizations_de.dart',
      'packages/halkyon_ui/lib/l10n/halkyon_ui_localizations_en.dart',
      'packages/halkyon_app/lib/l10n/halkyon_app_localizations.dart',
    ]) {
      expect(isOwnDartFile(path), isFalse, reason: path);
    }
  });

  test('the files of other languages are no Dart files', () {
    expect(isOwnDartFile('tool/app_icons.py'), isFalse);
    expect(
      isOwnDartFile('packages/halkyon_app/lib/l10n/halkyon_app_en.arb'),
      isFalse,
    );
  });

  group('what changed since a commit', () {
    const packages = {
      'halkyon_app': 'packages/halkyon_app',
      'halkyon_ui': 'packages/halkyon_ui',
      'halkyon_ui_example': 'packages/halkyon_ui/example',
      'halkyon_learn_flutter': 'apps/learn/halkyon_learn_flutter',
    };

    test('touches the packages its files are in, the innermost one', () {
      expect(
        packagesTouched([
          'packages/halkyon_app/lib/src/app/app_frame.dart',
          'packages/halkyon_app/test/app/instance_gate_test.dart',
          'packages/halkyon_ui/example/lib/main.dart',
        ], packages),
        ['halkyon_app', 'halkyon_ui_example'],
      );
    });

    test("files of no package (docs, tools, deploy) touch none: the tools' "
        'own tests run anyway', () {
      expect(
        packagesTouched([
          'docs/adr/0015-one-repository.md',
          'tool/check.dart',
          'deploy/compose.learn.yaml',
        ], packages),
        isEmpty,
      );
    });

    test("the root's pubspec, lock or lint rules touch every package", () {
      for (final path in [
        'pubspec.yaml',
        'pubspec.lock',
        'analysis_options.yaml',
      ]) {
        expect(packagesTouched([path], packages), isNull, reason: path);
      }
    });
  });

  test("Melos' filters take every package, or those touched and what "
      'depends on them', () {
    expect(melosFilters(), isEmpty);
    expect(melosFilters(touched: ['halkyon_app', 'halkyon_ui']), [
      '--scope=halkyon_app',
      '--scope=halkyon_ui',
      '--include-dependents',
    ]);
  });

  group('the generated code', () {
    test("the CLI's version is the one the lock holds Serverpod at", () {
      const lock = '''
packages:
  serverpod:
    dependency: transitive
    description:
      name: serverpod
      sha256: "0"
      url: "https://pub.dev"
    source: hosted
    version: "4.0.4"
sdks:
  dart: ">=3.13.0 <4.0.0"
''';
      expect(lockedVersion(lock, 'serverpod'), '4.0.4');
      expect(lockedVersion(lock, 'serverpod_cli'), isNull);
      expect(
        serverpodCliVersion('Some notice\nServerpod version: 4.0.4\n'),
        '4.0.4',
      );
      expect(serverpodCliVersion('serverpod: command not found'), isNull);
    });

    test('CI installs the CLI at the version the lock holds Serverpod at, so '
        "check.dart's comparison holds there too", () {
      final pinned = RegExp(
        r'^\s*SERVERPOD_VERSION: (\S+)$',
        multiLine: true,
      ).firstMatch(File('.forgejo/workflows/ci.yaml').readAsStringSync());
      expect(
        pinned?.group(1),
        lockedVersion(File('pubspec.lock').readAsStringSync(), 'serverpod'),
      );
    });

    test('differs where the generator changed, removed or added a file', () {
      final before = {
        'apps/learn/halkyon_learn_server/lib/src/studyset/studyset.spy.yaml':
            'a',
        'apps/learn/halkyon_learn_server/lib/src/generated/protocol.dart': 'b',
      };
      final after = {
        ...before,
        // Written anew from the changed model.
        'apps/learn/halkyon_learn_server/lib/src/generated/protocol.dart': 'c',
        // A model's class no longer generated.
        'apps/learn/halkyon_learn_client/lib/src/protocol/gone.dart':
            absentFile,
        // A new model's class.
        'apps/learn/halkyon_learn_client/lib/src/protocol/new.dart': 'd',
      };
      expect(differingFiles(before, after), [
        'apps/learn/halkyon_learn_client/lib/src/protocol/gone.dart',
        'apps/learn/halkyon_learn_client/lib/src/protocol/new.dart',
        'apps/learn/halkyon_learn_server/lib/src/generated/protocol.dart',
      ]);
    });

    test('a file written back as committed differs from its change before, '
        'and changes the generator left alone count for nothing', () {
      expect(
        differingFiles(
          {
            'apps/todo/halkyon_todo_client/lib/src/protocol/client.dart': 'a',
            'apps/todo/halkyon_todo_server/lib/src/greeting.dart': 'b',
          },
          {'apps/todo/halkyon_todo_server/lib/src/greeting.dart': 'b'},
        ),
        ['apps/todo/halkyon_todo_client/lib/src/protocol/client.dart'],
      );
    });
  });
}