import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'package:pdf_signature/l10n/app_localizations.dart';
import 'package:pdf_signature/ui/features/welcome/widgets/welcome_screen.dart';
import 'package:pdf_signature/data/repositories/document_repository.dart';

class _FakeDropReadable implements DropReadable {
  final String _name;
  final String? _path;
  final Uint8List _bytes;
  _FakeDropReadable(this._name, this._path, this._bytes);
  @override
  String get name => _name;
  @override
  String? get path => _path;
  @override
  Future<Uint8List> readAsBytes() async => _bytes;
}

void main() {
  testWidgets('dropping a PDF opens it and updates document state', (
    tester,
  ) async {
    await tester.pumpWidget(
      ProviderScope(
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: WelcomeScreen(
            onPickPdf: () async {},
            onOpenPdf:
                ({String? path, Uint8List? bytes, String? fileName}) async {},
          ),
        ),
      ),
    );

    final stateful = tester.state(find.byType(WelcomeScreen)) as ConsumerState;
    final bytes = Uint8List.fromList([1, 2, 3, 4]);
    final fake = _FakeDropReadable('sample.pdf', '/tmp/sample.pdf', bytes);

    // Call handleDroppedFiles with the onOpenPdf callback from the widget
    await handleDroppedFiles(({
      String? path,
      Uint8List? bytes,
      String? fileName,
    }) async {
      final container = ProviderScope.containerOf(stateful.context);
      final repo = container.read(documentRepositoryProvider.notifier);
      repo.openPicked(pageCount: 1, bytes: bytes);
    }, [fake]);
    await tester.pump();

    final container = ProviderScope.containerOf(stateful.context);
    final pdf = container.read(documentRepositoryProvider);
    expect(pdf.loaded, isTrue);
    expect(pdf.pickedPdfBytes, bytes);
  });
}