import 'package:flutter_test/flutter_test.dart';
import 'package:worldhopper/models/server.dart';
import 'package:worldhopper/services/server_software/server_software_type.dart';

// Kavita URL detection regex — extracted from KavitaServerSoftware for
// isolated testing without needing to construct the full dependency tree.
final _kavitaUrlPattern = RegExp(
  r'/api/opds/[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}',
);

/// Lightweight detection that mirrors ServerSoftwareService.detect() logic.
ServerSoftwareType _detect(Server server) {
  if (_kavitaUrlPattern.hasMatch(server.url)) return ServerSoftwareType.kavita;
  return ServerSoftwareType.generic;
}

Server _server({
  String url = 'https://example.com/opds',
  ServerSoftwareType? softwareType,
}) {
  return Server(
    id: 's1',
    name: 'Test Server',
    url: url,
    createdAt: DateTime(2024),
    softwareType: softwareType,
  );
}

void main() {
  group('detect', () {
    test('detects Kavita from URL pattern', () {
      final server = _server(
        url:
            'https://kavita.example.com/api/opds/12345678-1234-1234-1234-123456789abc',
      );
      expect(_detect(server), ServerSoftwareType.kavita);
    });

    test('returns generic for plain OPDS URL', () {
      final server = _server(url: 'https://example.com/opds');
      expect(_detect(server), ServerSoftwareType.generic);
    });

    test('returns generic for non-matching URL', () {
      final server = _server(url: 'https://example.com/feed.xml');
      expect(_detect(server), ServerSoftwareType.generic);
    });
  });

  group('getImplementation dispatch', () {
    test('null softwareType dispatches to generic', () {
      final server = _server(softwareType: null);
      final type = server.softwareType ?? ServerSoftwareType.generic;
      expect(type, ServerSoftwareType.generic);
    });

    test('generic softwareType dispatches to generic', () {
      final server = _server(softwareType: ServerSoftwareType.generic);
      final type = server.softwareType ?? ServerSoftwareType.generic;
      expect(type, ServerSoftwareType.generic);
    });

    test('kavita softwareType dispatches to kavita', () {
      final server = _server(softwareType: ServerSoftwareType.kavita);
      final type = server.softwareType ?? ServerSoftwareType.generic;
      expect(type, ServerSoftwareType.kavita);
    });
  });
}