import 'dart:typed_data';

import 'package:cxyz_android/services/ntfy_notifier.dart';
import 'package:cxyz_android/services/ntfy_settings.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:image/image.dart' as img;

void main() {
  group('NtfyNotifier.formatBytes', () {
    test('formats B KB MB', () {
      expect(NtfyNotifier.formatBytes(500), '500 B');
      expect(NtfyNotifier.formatBytes(1536), '1.5 KB');
      expect(NtfyNotifier.formatBytes(5 * 1024 * 1024), '5.0 MB');
    });
  });

  group('payload titles and body', () {
    test('completed title is scannable', () {
      expect(
        NtfyNotifier.completedTitle('One Piece', 'Chapter 1100'),
        'Downloaded · One Piece · Chapter 1100',
      );
    });

    test('failed title includes series and chapter', () {
      expect(
        NtfyNotifier.failedTitle('One Piece', 'Chapter 1100'),
        'Download failed · One Piece · Chapter 1100',
      );
    });

    test('drained title includes counts', () {
      expect(
        NtfyNotifier.drainedTitle(ok: 5, failed: 1),
        'Queue finished · 5 downloaded · 1 failed',
      );
    });

    test('completed body includes sizes and savings', () {
      final body = NtfyNotifier.completedBody(
        imageCount: 36,
        rawBytes: 10 * 1024 * 1024,
        cbzBytes: 8 * 1024 * 1024,
      );
      expect(body, contains('Pages: 36'));
      expect(body, contains('Images:'));
      expect(body, contains('CBZ:'));
      expect(body, contains('saved 20%'));
    });

    test('completed body appends note', () {
      final body = NtfyNotifier.completedBody(
        imageCount: 1,
        rawBytes: 100,
        cbzBytes: 90,
        note: 'Attachment skipped (15 MB limit)',
      );
      expect(body, contains('Attachment skipped (15 MB limit)'));
    });
  });

  group('NtfyAttachmentMode', () {
    test('fromStorage defaults to none', () {
      expect(NtfyAttachmentMode.fromStorage(null), NtfyAttachmentMode.none);
      expect(NtfyAttachmentMode.fromStorage('nope'), NtfyAttachmentMode.none);
      expect(
        NtfyAttachmentMode.fromStorage('firstImage'),
        NtfyAttachmentMode.firstImage,
      );
    });
  });

  group('preview resize', () {
    test('resizePreviewIsolate shrinks large image under 250 KB', () {
      final big = img.Image(width: 2000, height: 3000);
      img.fill(big, color: img.ColorRgb8(40, 80, 120));
      // Add noise so JPEG does not compress to near-zero.
      for (var y = 0; y < big.height; y += 17) {
        for (var x = 0; x < big.width; x += 13) {
          big.setPixelRgb(x, y, (x * 3) % 255, (y * 5) % 255, 90);
        }
      }
      final raw = Uint8List.fromList(img.encodeJpg(big, quality: 95));
      expect(raw.length, greaterThan(250 * 1024));

      final out = resizePreviewForTest(raw);
      expect(out, isNotNull);
      expect(out!.length, lessThanOrEqualTo(250 * 1024));

      final decoded = img.decodeImage(out)!;
      final longest =
          decoded.width > decoded.height ? decoded.width : decoded.height;
      expect(longest, lessThanOrEqualTo(720));
    });
  });

  group('encodeNtfyHeader', () {
    test('leaves plain ASCII unchanged', () {
      expect(encodeNtfyHeader('Downloaded Chapter 1'), 'Downloaded Chapter 1');
    });

    test('RFC 2047-encodes middle-dot titles', () {
      final encoded = encodeNtfyHeader('Downloaded · Series · Ch 1');
      expect(encoded.startsWith('=?UTF-8?B?'), isTrue);
      expect(encoded.endsWith('?='), isTrue);
      expect(encoded.codeUnits.every((c) => c >= 0x20 && c <= 0x7e), isTrue);
    });

    test('RFC 2047-encodes multiline message', () {
      final encoded = encodeNtfyHeader('Pages: 3\nImages: 1 MB\nCBZ: 0.9 MB');
      expect(encoded.startsWith('=?UTF-8?B?'), isTrue);
      expect(encoded.contains('\n'), isFalse);
    });
  });
}