import { ReviewAndCommentService } from '../src/core/review/review.service';
import { OrderStatus } from '../src/core/order/order-state-machine';

describe('ReviewAndCommentService (TDD 订单评价打分与动态评论测试套件)', () => {
  let service: ReviewAndCommentService;

  beforeEach(() => {
    service = new ReviewAndCommentService();
  });

  describe('1. 订单评价业务规则与越权拦截', () => {
    it('已完成(COMPLETED)状态的订单成功提交 5 星好评与评价标签', () => {
      const review = service.submitOrderReview({
        orderId: 'ord_1001',
        orderStatus: OrderStatus.COMPLETED,
        expertId: 101,
        userId: 2001,
        userNickname: '电竞小王子',
        rating: 5,
        tags: ['技术强', '声音好听', '带飞吃鸡'],
        content: '大神非常给力，连续吃鸡3把！'
      });

      expect(review.id).toBeDefined();
      expect(review.rating).toBe(5);
      expect(review.tags).toContain('带飞吃鸡');
      expect(review.orderId).toBe('ord_1001');
    });

    it('非 COMPLETED 状态的订单（如服务中/待付款）尝试评价应被拒绝拦截', () => {
      expect(() => {
        service.submitOrderReview({
          orderId: 'ord_1002',
          orderStatus: OrderStatus.IN_SERVICE,
          expertId: 101,
          userId: 2001,
          userNickname: '小李',
          rating: 5,
        });
      }).toThrow('只有已完成(COMPLETED)状态的订单才允许提交服务评价');
    });

    it('评分小于 1 或大于 5 时应抛出参数校验异常', () => {
      expect(() => {
        service.submitOrderReview({
          orderId: 'ord_1003',
          orderStatus: OrderStatus.COMPLETED,
          expertId: 101,
          userId: 2001,
          userNickname: '小李',
          rating: 6,
        });
      }).toThrow('评分必须在 1 至 5 星之间');

      expect(() => {
        service.submitOrderReview({
          orderId: 'ord_1004',
          orderStatus: OrderStatus.COMPLETED,
          expertId: 101,
          userId: 2001,
          userNickname: '小李',
          rating: 0,
        });
      }).toThrow('评分必须在 1 至 5 星之间');
    });

    it('同一订单禁止重复提交评价（防刷评）', () => {
      service.submitOrderReview({
        orderId: 'ord_1005',
        orderStatus: OrderStatus.COMPLETED,
        expertId: 101,
        userId: 2001,
        userNickname: '小李',
        rating: 5,
      });

      expect(() => {
        service.submitOrderReview({
          orderId: 'ord_1005',
          orderStatus: OrderStatus.COMPLETED,
          expertId: 101,
          userId: 2001,
          userNickname: '小李',
          rating: 4,
        });
      }).toThrow('该订单已评价，不可重复提交评价');
    });

    it('大神新增多条评价后，动态综合平均评分计算准确', () => {
      service.submitOrderReview({
        orderId: 'ord_201',
        orderStatus: OrderStatus.COMPLETED,
        expertId: 102,
        userId: 301,
        userNickname: '玩家A',
        rating: 5,
      });

      service.submitOrderReview({
        orderId: 'ord_202',
        orderStatus: OrderStatus.COMPLETED,
        expertId: 102,
        userId: 302,
        userNickname: '玩家B',
        rating: 4,
      });

      const avg = service.calculateExpertAverageRating(102);
      expect(avg).toBe(4.5);
    });
  });

  describe('2. 友圈动态互动评论区规则', () => {
    it('成功发表动态互动评论并支持按动态聚合查询', () => {
      const c1 = service.submitPostComment({
        postId: 'post_001',
        userId: 2001,
        author: '三里屯吃货',
        content: '我也在三里屯，求组队！'
      });

      const c2 = service.submitPostComment({
        postId: 'post_001',
        userId: 2002,
        author: '火锅达人',
        content: '晚上几点开饭？已加微。'
      });

      const list = service.getCommentsByPost('post_001');
      expect(list.length).toBe(2);
      expect(list[0].id).toBe(c1.id);
      expect(list[1].id).toBe(c2.id);
    });

    it('空评论或纯空格评论应被拦截', () => {
      expect(() => {
        service.submitPostComment({
          postId: 'post_001',
          userId: 2001,
          author: '张三',
          content: '   '
        });
      }).toThrow('评论内容不能为空');
    });

    it('超长评论（超过500字）应被安全阻断', () => {
      const longText = 'a'.repeat(501);
      expect(() => {
        service.submitPostComment({
          postId: 'post_001',
          userId: 2001,
          author: '张三',
          content: longText
        });
      }).toThrow('评论内容不能超过 500 个字符');
    });
  });
});