import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:app_pfm_ocr_v2/features/camera/image_preview_screen.dart';
import 'package:app_pfm_ocr_v2/features/camera/blur_detector.dart';

void main() {
  late Directory tempDir;
  late File tempFile;

  setUpAll(() {
    tempDir = Directory.systemTemp.createTempSync();
    tempFile = File('${tempDir.path}/test_preview_image.png');
    final dummyPngBytes = [
      137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82, 
      0, 0, 0, 1, 0, 0, 0, 1, 8, 6, 0, 0, 0, 31, 21, 196, 137, 
      0, 0, 0, 10, 73, 68, 65, 84, 120, 156, 99, 0, 1, 0, 0, 5, 
      0, 1, 13, 10, 45, 180, 0, 0, 0, 0, 73, 69, 78, 68, 174, 66, 96, 130
    ];
    tempFile.writeAsBytesSync(dummyPngBytes);
  });

  tearDownAll(() {
    try {
      tempFile.deleteSync();
      tempDir.deleteSync();
    } catch (_) {}
  });

  testWidgets('ImagePreviewScreen shows Blur Warning when image is blurry', (WidgetTester tester) async {
    // Inject blurry mock result
    BlurDetector.mockResult = BlurResult(score: 50.0, isBlur: true, rawScore: 250.0);

    await tester.pumpWidget(
      ProviderScope(
        child: MaterialApp(
          home: ImagePreviewScreen(imagePath: tempFile.path),
        ),
      ),
    );

    // Wait for analysis to finish
    await tester.pump();
    await tester.pump(const Duration(seconds: 1));

    // Verify warning text is displayed
    expect(find.text('Foto Terdeteksi Blur!'), findsOneWidget);
    expect(find.text('Kualitas Foto Baik'), findsNothing);

    // Verify "Unggah Dokumen" button is disabled (has null onPressed)
    final uploadButton = tester.widget<ElevatedButton>(find.byType(ElevatedButton));
    expect(uploadButton.onPressed, isNull);

    BlurDetector.mockResult = null;
  });

  testWidgets('ImagePreviewScreen shows Sharp Success when image is clear', (WidgetTester tester) async {
    // Inject sharp mock result
    BlurDetector.mockResult = BlurResult(score: 95.0, isBlur: false, rawScore: 475.0);

    await tester.pumpWidget(
      ProviderScope(
        child: MaterialApp(
          home: ImagePreviewScreen(imagePath: tempFile.path),
        ),
      ),
    );

    // Wait for analysis to finish
    await tester.pump();
    await tester.pump(const Duration(seconds: 1));

    // Verify success text is displayed
    expect(find.text('Kualitas Foto Baik'), findsOneWidget);
    expect(find.text('Foto Terdeteksi Blur!'), findsNothing);

    // Verify "Unggah Dokumen" button is enabled (has non-null onPressed)
    final uploadButton = tester.widget<ElevatedButton>(find.byType(ElevatedButton));
    expect(uploadButton.onPressed, isNotNull);

    BlurDetector.mockResult = null;
  });
}