import {
  CardPosterLayoutEngine,
  calculatePosterCanvasDimensions,
  calculatePosterElementBoxes,
  PosterLayoutOptions,
  PosterElementBox,
} from '../../../src/modules/card/service/poster-layout';

describe('Point 54: 商务展会多语言电子邀请海报轻量级排版引擎', () => {
  let engine: CardPosterLayoutEngine;

  beforeEach(() => {
    engine = new CardPosterLayoutEngine();
  });

  describe('1. calculatePosterCanvasDimensions (画布尺寸比例计算)', () => {
    it('9:16 比例应计算为标准 1080x1920 尺寸', () => {
      const dim = calculatePosterCanvasDimensions('story_9_16');
      expect(dim.width).toBe(1080);
      expect(dim.height).toBe(1920);
      expect(dim.aspectRatio).toBe('9:16');
    });

    it('4:5 比例应计算为 1080x1350 尺寸', () => {
      const dim = calculatePosterCanvasDimensions('feed_4_5');
      expect(dim.width).toBe(1080);
      expect(dim.height).toBe(1350);
      expect(dim.aspectRatio).toBe('4:5');
    });
  });

  describe('2. calculatePosterElementBoxes (多元素布局坐标与安全区排布)', () => {
    const mockOptions: PosterLayoutOptions = {
      aspectRatio: 'story_9_16',
      cardName: 'Alex Zheng',
      title: 'VP of International BD',
      company: 'OmniCard Global AI Ltd.',
      eventName: 'GITEX Global 2026 Dubai',
      boothNumber: 'Hall 4, Stand B-28',
      qrCodeSize: 240,
    };

    it('应计算包含头部标头、人物卡片、展会信息与底部二维码的精准坐标盒', () => {
      const boxes = calculatePosterElementBoxes(mockOptions);

      expect(boxes.avatarBox).toBeDefined();
      expect(boxes.nameBox).toBeDefined();
      expect(boxes.eventBox).toBeDefined();
      expect(boxes.qrBox).toBeDefined();

      // 二维码位于海报底部且居中
      expect(boxes.qrBox.width).toBe(240);
      expect(boxes.qrBox.height).toBe(240);
      expect(boxes.qrBox.x).toBe((1080 - 240) / 2);
      expect(boxes.qrBox.y).toBeGreaterThan(1300); // 靠近下半部分
    });

    it('文字过长时应自动计算截断与文本适应预警', () => {
      const longOptions: PosterLayoutOptions = {
        ...mockOptions,
        title: 'Very Long Title Exceeding Single Line Width That Needs Smart Handling In Print',
      };

      const boxes = calculatePosterElementBoxes(longOptions);
      expect(boxes.titleBox.isMultiLine).toBe(true);
    });
  });

  describe('3. CardPosterLayoutEngine 生成完整布局方案', () => {
    it('应输出可直接供 Canvas 或 SVG 渲染的完整海报元数据清单', () => {
      const manifest = engine.generateLayoutManifest({
        aspectRatio: 'story_9_16',
        cardName: 'Tariq Al-Mansoor',
        title: 'Middle East Regional Director',
        company: 'Saudi Digital Tech',
        eventName: 'LEAP 2026 Riyadh',
        boothNumber: 'Hall 2, C-15',
      });

      expect(manifest.canvas.width).toBe(1080);
      expect(manifest.themeColor).toBe('#0B5CFF'); // 瑞士国际主义单一钴蓝主色
      expect(manifest.elements.length).toBeGreaterThanOrEqual(4);
    });
  });
});