import { describe, it, expect, beforeEach, afterEach } from '@jest/globals';
import { db } from '@/db';
import { users, content, siteConfig } from '@/db/schema';
import { eq, and, desc, like } from 'drizzle-orm';

jest.mock('@/db', () => {
  const mockDb = {
    select: jest.fn().mockReturnThis(),
    from: jest.fn().mockReturnThis(),
    where: jest.fn().mockReturnThis(),
    orderBy: jest.fn().mockReturnThis(),
    limit: jest.fn().mockReturnThis(),
    insert: jest.fn().mockReturnThis(),
    values: jest.fn().mockReturnThis(),
    returning: jest.fn().mockReturnThis(),
    update: jest.fn().mockReturnThis(),
    set: jest.fn().mockReturnThis(),
    delete: jest.fn().mockReturnThis(),
  };
  return {
    db: mockDb,
  };
});

describe('database queries', () => {
  let mockDb: any;

  beforeEach(() => {
    const { db: dbInstance } = require('@/db');
    mockDb = dbInstance;
  });

  afterEach(() => {
    jest.clearAllMocks();
  });

  describe('user queries', () => {
    it('should query user by id', async () => {
      const mockUser = {
        id: '123',
        email: 'test@example.com',
        name: 'Test User',
        role: 'editor',
        createdAt: new Date(),
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockUser]);

      const result = await db.select().from(users).where(eq(users.id, '123')).limit(1);
      const user = result[0];

      expect(user).toBeDefined();
      expect(user.id).toBe('123');
      expect(user.email).toBe('test@example.com');
    });

    it('should query user by email', async () => {
      const mockUser = {
        id: '123',
        email: 'test@example.com',
        name: 'Test User',
        role: 'editor',
        createdAt: new Date(),
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockUser]);

      const result = await db.select().from(users).where(eq(users.email, 'test@example.com')).limit(1);
      const user = result[0];

      expect(user).toBeDefined();
      expect(user.email).toBe('test@example.com');
    });

    it('should return null for non-existent user', async () => {
      mockDb.limit.mockResolvedValue([]);

      const result = await db.select().from(users).where(eq(users.id, 'non-existent')).limit(1);
      const user = result[0];

      expect(user).toBeUndefined();
    });

    it('should query users by role', async () => {
      const mockUsers = [
        { id: '1', email: 'admin@example.com', name: 'Admin', role: 'admin', createdAt: new Date(), updatedAt: new Date() },
        { id: '2', email: 'admin2@example.com', name: 'Admin2', role: 'admin', createdAt: new Date(), updatedAt: new Date() },
      ];
      mockDb.limit.mockResolvedValue(mockUsers);

      const result = await db.select().from(users).where(eq(users.role, 'admin')).limit(10);

      expect(result.length).toBe(2);
      expect(result.every(u => u.role === 'admin')).toBe(true);
    });
  });

  describe('content queries', () => {
    it('should query content by id', async () => {
      const mockContent = {
        id: 'content-1',
        type: 'news',
        title: 'Test News',
        slug: 'test-news',
        content: 'Test content',
        status: 'published',
        authorId: '123',
        createdAt: new Date(),
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockContent]);

      const result = await db.select().from(content).where(eq(content.id, 'content-1')).limit(1);
      const item = result[0];

      expect(item).toBeDefined();
      expect(item.id).toBe('content-1');
      expect(item.title).toBe('Test News');
    });

    it('should query content by slug', async () => {
      const mockContent = {
        id: 'content-1',
        type: 'news',
        title: 'Test News',
        slug: 'test-news',
        content: 'Test content',
        status: 'published',
        authorId: '123',
        createdAt: new Date(),
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockContent]);

      const result = await db.select().from(content).where(eq(content.slug, 'test-news')).limit(1);
      const item = result[0];

      expect(item).toBeDefined();
      expect(item.slug).toBe('test-news');
    });

    it('should query published content', async () => {
      const mockContent = [
        { id: '1', type: 'news', title: 'News 1', slug: 'news-1', content: 'Content 1', status: 'published', authorId: '123', createdAt: new Date(), updatedAt: new Date() },
        { id: '2', type: 'news', title: 'News 2', slug: 'news-2', content: 'Content 2', status: 'published', authorId: '123', createdAt: new Date(), updatedAt: new Date() },
      ];
      mockDb.limit.mockResolvedValue(mockContent);

      const result = await db.select().from(content).where(eq(content.status, 'published')).limit(10);

      expect(result.length).toBe(2);
      expect(result.every(c => c.status === 'published')).toBe(true);
    });

    it('should query content by type', async () => {
      const mockContent = [
        { id: '1', type: 'news', title: 'News 1', slug: 'news-1', content: 'Content 1', status: 'published', authorId: '123', createdAt: new Date(), updatedAt: new Date() },
        { id: '2', type: 'news', title: 'News 2', slug: 'news-2', content: 'Content 2', status: 'published', authorId: '123', createdAt: new Date(), updatedAt: new Date() },
      ];
      mockDb.limit.mockResolvedValue(mockContent);

      const result = await db.select().from(content).where(eq(content.type, 'news')).limit(10);

      expect(result.length).toBe(2);
      expect(result.every(c => c.type === 'news')).toBe(true);
    });

    it('should query content with multiple conditions', async () => {
      const mockContent = {
        id: 'content-1',
        type: 'news',
        title: 'Test News',
        slug: 'test-news',
        content: 'Test content',
        status: 'published',
        authorId: '123',
        createdAt: new Date(),
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockContent]);

      const result = await db
        .select()
        .from(content)
        .where(and(eq(content.status, 'published'), eq(content.type, 'news')))
        .limit(1);
      const item = result[0];

      expect(item).toBeDefined();
      expect(item.status).toBe('published');
      expect(item.type).toBe('news');
    });
  });

  describe('site config queries', () => {
    it('should query config by key', async () => {
      const mockConfig = {
        id: 'config-1',
        key: 'site.title',
        value: { title: 'My Site' },
        category: 'general',
        updatedAt: new Date(),
      };
      mockDb.limit.mockResolvedValue([mockConfig]);

      const result = await db.select().from(siteConfig).where(eq(siteConfig.key, 'site.title')).limit(1);
      const config = result[0];

      expect(config).toBeDefined();
      expect(config.key).toBe('site.title');
      expect(config.value).toEqual({ title: 'My Site' });
    });

    it('should query config by category', async () => {
      const mockConfigs = [
        { id: '1', key: 'site.title', value: { title: 'My Site' }, category: 'general', updatedAt: new Date() },
        { id: '2', key: 'site.description', value: { description: 'My Description' }, category: 'general', updatedAt: new Date() },
      ];
      mockDb.limit.mockResolvedValue(mockConfigs);

      const result = await db.select().from(siteConfig).where(eq(siteConfig.category, 'general')).limit(10);

      expect(result.length).toBe(2);
      expect(result.every(c => c.category === 'general')).toBe(true);
    });

    it('should return null for non-existent config', async () => {
      mockDb.limit.mockResolvedValue([]);

      const result = await db.select().from(siteConfig).where(eq(siteConfig.key, 'non.existent')).limit(1);
      const config = result[0];

      expect(config).toBeUndefined();
    });
  });

  describe('query ordering', () => {
    it('should order content by created date', async () => {
      const mockContent = [
        { id: '1', type: 'news', title: 'News 1', slug: 'news-1', content: 'Content 1', status: 'published', authorId: '123', createdAt: new Date('2024-01-01'), updatedAt: new Date() },
        { id: '2', type: 'news', title: 'News 2', slug: 'news-2', content: 'Content 2', status: 'published', authorId: '123', createdAt: new Date('2024-01-02'), updatedAt: new Date() },
      ];
      mockDb.limit.mockResolvedValue(mockContent);

      const result = await db
        .select()
        .from(content)
        .orderBy(desc(content.createdAt))
        .limit(10);

      expect(result.length).toBe(2);
      expect(mockDb.orderBy).toHaveBeenCalledWith(desc(content.createdAt));
    });
  });
});