// JournalElement 模型单元测试
//
// 覆盖：工厂方法、便利工厂、copyWith 不可变性、序列化往返、默认值

import 'dart:math';

import 'package:flutter_test/flutter_test.dart';
import 'package:nuanji_app/data/models/journal_element.dart';

void main() {
  group('JournalElement', () {
    // ===== create 工厂 =====

    test('create 工厂生成正确的默认值', () {
      final element = JournalElement.create(
        journalId: 'journal-1',
        elementType: ElementType.text,
        positionX: 10,
        positionY: 20,
        content: {'text': 'Hello'},
      );

      expect(element.journalId, 'journal-1');
      expect(element.elementType, ElementType.text);
      expect(element.positionX, 10.0);
      expect(element.positionY, 20.0);
      expect(element.width, 100.0);
      expect(element.height, 100.0);
      expect(element.rotation, 0.0);
      expect(element.zIndex, 0);
      expect(element.version, 1);
      expect(element.id, isNotEmpty);
      expect(element.createdAt, isNotNull);
      expect(element.updatedAt, isNotNull);
    });

    // ===== createText =====

    test('createText 便利工厂', () {
      final element = JournalElement.createText(
        journalId: 'j-1',
        text: '你好',
        position: const Offset(50, 100),
        fontSize: 24.0,
        fontColor: '#E07A5F',
      );

      expect(element.elementType, ElementType.text);
      expect(element.content['text'], '你好');
      expect(element.content['fontSize'], 24.0);
      expect(element.content['fontColor'], '#E07A5F');
      expect(element.positionX, 50.0);
      expect(element.positionY, 100.0);
    });

    test('createText 使用默认字号和颜色', () {
      final element = JournalElement.createText(
        journalId: 'j-1',
        text: '默认',
        position: Offset.zero,
      );

      expect(element.content['fontSize'], 18.0);
      expect(element.content['fontColor'], '#2D2420');
    });

    // ===== createImage =====

    test('createImage 便利工厂', () {
      final element = JournalElement.createImage(
        journalId: 'j-1',
        filePath: '/path/to/image.jpg',
        position: Offset.zero,
        thumbnailPath: '/path/to/thumb.jpg',
      );

      expect(element.elementType, ElementType.image);
      expect(element.content['filePath'], '/path/to/image.jpg');
      expect(element.content['thumbnailPath'], '/path/to/thumb.jpg');
    });

    test('createImage 无 thumbnailPath 时不包含该字段', () {
      final element = JournalElement.createImage(
        journalId: 'j-1',
        filePath: '/path/to/img.jpg',
        position: Offset.zero,
      );

      expect(element.content.containsKey('thumbnailPath'), isFalse);
      expect(element.content['filePath'], '/path/to/img.jpg');
    });

    // ===== createSticker =====

    test('createSticker 便利工厂', () {
      final element = JournalElement.createSticker(
        journalId: 'j-1',
        emoji: '🐱',
        position: const Offset(50, 50),
        stickerPackId: 'pack-1',
        stickerId: 's-1',
      );

      expect(element.elementType, ElementType.sticker);
      expect(element.content['emoji'], '🐱');
      expect(element.content['stickerPackId'], 'pack-1');
      expect(element.content['stickerId'], 's-1');
    });

    test('createSticker 无可选字段时不包含', () {
      final element = JournalElement.createSticker(
        journalId: 'j-1',
        emoji: '🌸',
        position: Offset.zero,
      );

      expect(element.content.containsKey('stickerPackId'), isFalse);
      expect(element.content.containsKey('stickerId'), isFalse);
      expect(element.content['emoji'], '🌸');
    });

    // ===== copyWith 不可变性 =====

    test('copyWith 返回新实例且不修改原始', () {
      final original = JournalElement.createText(
        journalId: 'j-1',
        text: '原始',
        position: Offset.zero,
      );

      final modified = original.copyWith(
        positionX: 100.0,
        positionY: 200.0,
      );

      expect(identical(original, modified), isFalse);
      expect(original.positionX, 0.0);
      expect(original.positionY, 0.0);
      expect(modified.positionX, 100.0);
      expect(modified.positionY, 200.0);
      expect(modified.journalId, original.journalId);
      expect(modified.id, original.id);
    });

    // ===== 序列化 =====

    test('toJson / fromJson 往返一致', () {
      final original = JournalElement.createText(
        journalId: 'j-1',
        text: '序列化测试',
        position: const Offset(42, 84),
        fontSize: 20.0,
      );

      final json = original.toJson();
      final restored = JournalElement.fromJson(json);

      expect(restored.id, original.id);
      expect(restored.journalId, original.journalId);
      expect(restored.elementType, original.elementType);
      expect(restored.positionX, original.positionX);
      expect(restored.positionY, original.positionY);
      expect(restored.content['text'], original.content['text']);
      expect(restored.version, original.version);
    });

    test('fromJson 处理空 content', () {
      final json = {
        'id': 'test-id',
        'journal_id': 'j-1',
        'element_type': 'text',
        'position_x': 0.0,
        'position_y': 0.0,
        'width': 100.0,
        'height': 100.0,
        'rotation': 0.0,
        'z_index': 0,
        'content': <String, dynamic>{},
        'version': 1,
        'created_at': DateTime.now().toIso8601String(),
        'updated_at': DateTime.now().toIso8601String(),
      };

      final element = JournalElement.fromJson(json);
      expect(element.content, isA<Map>());
      expect(element.content, isEmpty);
    });

    // ===== ElementType 枚举 =====

    test('ElementType 枚举值完整', () {
      expect(ElementType.values.length, 5);
      expect(ElementType.values, containsAll([
        ElementType.text,
        ElementType.image,
        ElementType.sticker,
        ElementType.handwritingRef,
        ElementType.tape,
      ]));
    });
  });
}