import { describe, it, expect, beforeEach, vi } from 'vitest';
import { DataSource, Repository } from 'typeorm';
import { OrderMt } from '@d8d/orders-module-mt';
import { DataOverviewServiceMt, TimeFilterParams, SummaryStatistics } from '../../src/services/data-overview.service';

// Mock redisUtil with importOriginal to preserve other exports
vi.mock('@d8d/shared-utils', async (importOriginal) => {
  const actual = await importOriginal<typeof import('@d8d/shared-utils')>();
  return {
    ...actual,
    redisUtil: {
      get: vi.fn(),
      set: vi.fn(),
      keys: vi.fn(),
      del: vi.fn()
    },
    AppDataSource: {}
  };
});

describe('DataOverviewServiceMt', () => {
  let service: DataOverviewServiceMt;
  let mockDataSource: DataSource;
  let mockOrderRepository: Repository<OrderMt>;
  let mockRedisUtil: any;

  beforeEach(() => {
    // Mock Order Repository
    mockOrderRepository = {
      createQueryBuilder: vi.fn(() => ({
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        setParameters: vi.fn().mockReturnThis(),
        getRawOne: vi.fn()
      }))
    } as any;

    // Mock DataSource
    mockDataSource = {
      getRepository: vi.fn((entity) => {
        if (entity === OrderMt) {
          return mockOrderRepository;
        }
        return {} as any;
      })
    } as any;

    // Get mocked redisUtil
    const { redisUtil } = require('@d8d/shared-utils');
    mockRedisUtil = redisUtil;
    vi.mocked(mockRedisUtil.get).mockReset();
    vi.mocked(mockRedisUtil.set).mockReset();
    vi.mocked(mockRedisUtil.keys).mockReset();
    vi.mocked(mockRedisUtil.del).mockReset();

    service = new DataOverviewServiceMt(mockDataSource);
  });

  describe('getDateRange', () => {
    it('应该返回今天的时间范围（默认）', () => {
      const now = new Date('2025-12-26T10:00:00Z');
      vi.setSystemTime(now);

      const params: TimeFilterParams = {};
      const result = service['getDateRange'](params);

      const expectedStart = new Date('2025-12-26T00:00:00Z');
      const expectedEnd = new Date('2025-12-26T23:59:59.999Z');

      expect(result.startDate.toISOString()).toBe(expectedStart.toISOString());
      expect(result.endDate.toISOString()).toBe(expectedEnd.toISOString());
    });

    it('应该返回昨天的时间范围', () => {
      const now = new Date('2025-12-26T10:00:00Z');
      vi.setSystemTime(now);

      const params: TimeFilterParams = { timeRange: 'yesterday' };
      const result = service['getDateRange'](params);

      const expectedStart = new Date('2025-12-25T00:00:00Z');
      const expectedEnd = new Date('2025-12-25T23:59:59.999Z');

      expect(result.startDate.toISOString()).toBe(expectedStart.toISOString());
      expect(result.endDate.toISOString()).toBe(expectedEnd.toISOString());
    });

    it('应该返回最近7天的时间范围', () => {
      const now = new Date('2025-12-26T10:00:00Z');
      vi.setSystemTime(now);

      const params: TimeFilterParams = { timeRange: 'last7days' };
      const result = service['getDateRange'](params);

      const expectedStart = new Date('2025-12-19T10:00:00Z'); // 7天前
      const expectedEnd = now;

      expect(result.startDate.toISOString()).toBe(expectedStart.toISOString());
      expect(result.endDate.toISOString()).toBe(expectedEnd.toISOString());
    });

    it('应该返回最近30天的时间范围', () => {
      const now = new Date('2025-12-26T10:00:00Z');
      vi.setSystemTime(now);

      const params: TimeFilterParams = { timeRange: 'last30days' };
      const result = service['getDateRange'](params);

      const expectedStart = new Date('2025-11-26T10:00:00Z'); // 30天前
      const expectedEnd = now;

      expect(result.startDate.toISOString()).toBe(expectedStart.toISOString());
      expect(result.endDate.toISOString()).toBe(expectedEnd.toISOString());
    });

    it('应该返回自定义时间范围', () => {
      const params: TimeFilterParams = {
        timeRange: 'custom',
        startDate: '2025-01-01T00:00:00Z',
        endDate: '2025-01-31T23:59:59Z'
      };
      const result = service['getDateRange'](params);

      expect(result.startDate.toISOString()).toBe('2025-01-01T00:00:00.000Z');
      expect(result.endDate.toISOString()).toBe('2025-01-31T23:59:59.000Z');
    });

    it('当自定义时间范围缺少参数时应该使用默认值', () => {
      const now = new Date('2025-12-26T10:00:00Z');
      vi.setSystemTime(now);

      const params: TimeFilterParams = { timeRange: 'custom' }; // 缺少startDate和endDate
      const result = service['getDateRange'](params);

      const expectedStart = new Date('2025-12-26T00:00:00Z');
      const expectedEnd = new Date('2025-12-26T23:59:59.999Z');

      expect(result.startDate.toISOString()).toBe(expectedStart.toISOString());
      expect(result.endDate.toISOString()).toBe(expectedEnd.toISOString());
    });
  });

  describe('getSummaryStatistics', () => {
    it('应该从缓存返回统计数据', async () => {
      const tenantId = 1;
      const params: TimeFilterParams = { timeRange: 'today' };
      const cacheKey = `data_overview:summary:${tenantId}:today::`;
      const cachedStats: SummaryStatistics = {
        totalSales: 10000,
        totalOrders: 50,
        wechatSales: 6000,
        wechatOrders: 30,
        creditSales: 4000,
        creditOrders: 20,
        todaySales: 500,
        todayOrders: 5
      };

      mockRedisUtil.get.mockResolvedValue(JSON.stringify(cachedStats));

      const result = await service.getSummaryStatistics(tenantId, params);

      expect(result).toEqual(cachedStats);
      expect(mockRedisUtil.get).toHaveBeenCalledWith(cacheKey);
      expect(mockRedisUtil.set).not.toHaveBeenCalled();
    });

    it('当缓存未命中时应该查询数据库并设置缓存', async () => {
      const tenantId = 1;
      const params: TimeFilterParams = { timeRange: 'today' };
      const cacheKey = `data_overview:summary:${tenantId}:today::`;

      mockRedisUtil.get.mockResolvedValue(null);

      // Mock database query result
      const mockQueryBuilder = {
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        setParameters: vi.fn().mockReturnThis(),
        getRawOne: vi.fn().mockResolvedValue({
          total_orders: '50',
          total_sales: '10000.50',
          wechat_sales: '6000.00',
          credit_sales: '4000.50',
          wechat_orders: '30',
          credit_orders: '20'
        })
      };

      const mockTodayQueryBuilder = {
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        getRawOne: vi.fn().mockResolvedValue({
          today_orders: '5',
          today_sales: '500.00'
        })
      };

      vi.mocked(mockOrderRepository.createQueryBuilder)
        .mockReturnValueOnce(mockQueryBuilder as any)
        .mockReturnValueOnce(mockTodayQueryBuilder as any);

      const result = await service.getSummaryStatistics(tenantId, params);

      expect(result.totalSales).toBe(10000.50);
      expect(result.totalOrders).toBe(50);
      expect(result.wechatSales).toBe(6000);
      expect(result.creditSales).toBe(4000.50);
      expect(result.wechatOrders).toBe(30);
      expect(result.creditOrders).toBe(20);
      expect(result.todaySales).toBe(500);
      expect(result.todayOrders).toBe(5);

      expect(mockRedisUtil.set).toHaveBeenCalledWith(
        cacheKey,
        expect.any(String),
        5 * 60 // 5分钟TTL（今日数据）
      );
    });

    it('应该为历史数据设置30分钟缓存', async () => {
      const tenantId = 1;
      const params: TimeFilterParams = { timeRange: 'last7days' };
      const cacheKey = `data_overview:summary:${tenantId}:last7days::`;

      mockRedisUtil.get.mockResolvedValue(null);

      const mockQueryBuilder = {
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        setParameters: vi.fn().mockReturnThis(),
        getRawOne: vi.fn().mockResolvedValue({
          total_orders: '100',
          total_sales: '20000.00',
          wechat_sales: '12000.00',
          credit_sales: '8000.00',
          wechat_orders: '60',
          credit_orders: '40'
        })
      };

      const mockTodayQueryBuilder = {
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        getRawOne: vi.fn().mockResolvedValue({
          today_orders: '10',
          today_sales: '1000.00'
        })
      };

      vi.mocked(mockOrderRepository.createQueryBuilder)
        .mockReturnValueOnce(mockQueryBuilder as any)
        .mockReturnValueOnce(mockTodayQueryBuilder as any);

      await service.getSummaryStatistics(tenantId, params);

      expect(mockRedisUtil.set).toHaveBeenCalledWith(
        cacheKey,
        expect.any(String),
        30 * 60 // 30分钟TTL（历史数据）
      );
    });
  });

  describe('getTodayStatistics', () => {
    it('应该从缓存返回今日统计数据', async () => {
      const tenantId = 1;
      const today = new Date().toISOString().split('T')[0];
      const cacheKey = `data_overview:today:${tenantId}:${today}`;
      const cachedStats = { todaySales: 500, todayOrders: 5 };

      mockRedisUtil.get.mockResolvedValue(JSON.stringify(cachedStats));

      const result = await service.getTodayStatistics(tenantId);

      expect(result).toEqual(cachedStats);
      expect(mockRedisUtil.get).toHaveBeenCalledWith(cacheKey);
      expect(mockRedisUtil.set).not.toHaveBeenCalled();
    });

    it('当缓存未命中时应该查询数据库并设置缓存', async () => {
      const tenantId = 1;
      const today = new Date().toISOString().split('T')[0];
      const cacheKey = `data_overview:today:${tenantId}:${today}`;

      mockRedisUtil.get.mockResolvedValue(null);

      const mockQueryBuilder = {
        select: vi.fn().mockReturnThis(),
        where: vi.fn().mockReturnThis(),
        andWhere: vi.fn().mockReturnThis(),
        getRawOne: vi.fn().mockResolvedValue({
          today_orders: '5',
          today_sales: '500.00'
        })
      };

      vi.mocked(mockOrderRepository.createQueryBuilder).mockReturnValue(mockQueryBuilder as any);

      const result = await service.getTodayStatistics(tenantId);

      expect(result.todaySales).toBe(500);
      expect(result.todayOrders).toBe(5);
      expect(mockRedisUtil.set).toHaveBeenCalledWith(cacheKey, expect.any(String), 5 * 60);
    });
  });

  describe('clearCache', () => {
    it('应该清理指定租户的所有缓存', async () => {
      const tenantId = 1;
      const cacheKeys = [
        'data_overview:summary:1:today::',
        'data_overview:today:1:2025-12-26'
      ];

      mockRedisUtil.keys.mockResolvedValue(cacheKeys);

      await service.clearCache(tenantId);

      expect(mockRedisUtil.keys).toHaveBeenCalledWith('data_overview:*:1:*');
      expect(mockRedisUtil.del).toHaveBeenCalledWith(...cacheKeys);
    });

    it('当没有缓存键时不应该调用del', async () => {
      const tenantId = 1;

      mockRedisUtil.keys.mockResolvedValue([]);

      await service.clearCache(tenantId);

      expect(mockRedisUtil.keys).toHaveBeenCalledWith('data_overview:*:1:*');
      expect(mockRedisUtil.del).not.toHaveBeenCalled();
    });
  });
});