import request from 'supertest';
import express, { Application } from 'express';
import adminRoutes from '../../../src/routes/admin';
import Location from '../../../src/models/Location';
import ProfanityWord from '../../../src/models/ProfanityWord';
import ProfanityFilterService from '../../../src/services/ProfanityFilterService';
import { createTestDatabase, createTestProfanityDatabase } from '../../setup';
import { Database } from 'sqlite3';

describe('Admin API Routes', () => {
  let app: Application;
  let db: Database;
  let profanityDb: Database;
  let locationModel: Location;
  let profanityWordModel: ProfanityWord;
  let profanityFilterService: ProfanityFilterService;
  let authToken: string;

  beforeEach(async () => {
    // Setup Express app
    app = express();
    app.use(express.json());

    // Setup test databases and models
    db = await createTestDatabase();
    profanityDb = await createTestProfanityDatabase();
    locationModel = new Location(db);
    profanityWordModel = new ProfanityWord(profanityDb);
    profanityFilterService = new ProfanityFilterService(profanityWordModel);
    await profanityFilterService.initialize();

    // Create mock authentication middleware
    const mockAuthMiddleware = (req: any, res: any, next: any) => {
      const authHeader = req.headers.authorization;
      if (!authHeader) {
        return res.status(401).json({ error: 'Access denied' });
      }

      const token = authHeader.split(' ')[1];
      if (!token || !authHeader.startsWith('Bearer ')) {
        return res.status(401).json({ error: 'Access denied' });
      }

      // Simple token validation for testing
      if (token === authToken) {
        next();
      } else {
        res.status(401).json({ error: 'Invalid token' });
      }
    };

    // Setup routes
    app.use('/api/admin', adminRoutes(locationModel, profanityWordModel, profanityFilterService, mockAuthMiddleware));

    // Set admin password for testing
    process.env.ADMIN_PASSWORD = 'test_admin_password';

    // Login to get auth token
    const loginResponse = await request(app)
      .post('/api/admin/login')
      .send({ password: 'test_admin_password' });

    authToken = loginResponse.body.token;
  });

  afterEach((done) => {
    let closedCount = 0;
    const checkBothClosed = () => {
      closedCount++;
      if (closedCount === 2) done();
    };

    db.close(checkBothClosed);
    profanityDb.close(checkBothClosed);
  });

  describe('POST /api/admin/login', () => {
    it('should authenticate with correct password', async () => {
      const response = await request(app)
        .post('/api/admin/login')
        .send({ password: 'test_admin_password' })
        .expect(200);

      expect(response.body).toHaveProperty('token');
      expect(response.body).toHaveProperty('message');
      expect(response.body.message).toBe('Login successful');
      expect(typeof response.body.token).toBe('string');
    });

    it('should reject invalid password', async () => {
      const response = await request(app)
        .post('/api/admin/login')
        .send({ password: 'wrong_password' })
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Invalid password');
    });

    it('should reject missing password', async () => {
      const response = await request(app)
        .post('/api/admin/login')
        .send({})
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Invalid password');
    });
  });

  describe('Authentication middleware', () => {
    it('should reject requests without auth token', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Access denied');
    });

    it('should reject requests with invalid auth token', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', 'Bearer invalid_token')
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Invalid token');
    });

    it('should accept requests with valid auth token', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(Array.isArray(response.body)).toBe(true);
    });
  });

  describe('GET /api/admin/locations', () => {
    beforeEach(async () => {
      await locationModel.create({
        address: 'Admin Test Location 1',
        latitude: 42.9634,
        longitude: -85.6681,
        description: 'Test description 1'
      });

      await locationModel.create({
        address: 'Admin Test Location 2',
        latitude: 42.9584,
        longitude: -85.6706,
        description: 'Test description 2'
      });
    });

    it('should return all locations for admin', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(Array.isArray(response.body)).toBe(true);
      expect(response.body).toHaveLength(2);
      expect(response.body[0]).toHaveProperty('id');
      expect(response.body[0]).toHaveProperty('address');
      expect(response.body[0]).toHaveProperty('created_at');
    });

    it('should handle empty location list', async () => {
      // Clear all locations
      await locationModel.delete(1);
      await locationModel.delete(2);

      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(response.body).toEqual([]);
    });
  });

  describe('PUT /api/admin/locations/:id', () => {
    let locationId: number;

    beforeEach(async () => {
      const location = await locationModel.create({
        address: 'Original Address',
        description: 'Original Description'
      });
      locationId = location.id;
    });

    it('should update location successfully', async () => {
      const updateData = {
        address: 'Updated Address',
        latitude: 42.9634,
        longitude: -85.6681,
        description: 'Updated Description'
      };

      const response = await request(app)
        .put(`/api/admin/locations/${locationId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .send(updateData)
        .expect(200);

      expect(response.body).toHaveProperty('message');
      expect(response.body.message).toBe('Location updated successfully');
    });

    it('should handle non-existent location', async () => {
      const updateData = {
        address: 'Updated Address'
      };

      const response = await request(app)
        .put('/api/admin/locations/99999')
        .set('Authorization', `Bearer ${authToken}`)
        .send(updateData)
        .expect(404);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Location not found');
    });

    it('should validate required fields', async () => {
      const response = await request(app)
        .put(`/api/admin/locations/${locationId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .send({})
        .expect(400);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Address is required');
    });
  });

  describe('PATCH /api/admin/locations/:id/persistent', () => {
    let locationId: number;

    beforeEach(async () => {
      const location = await locationModel.create({
        address: 'Test Location'
      });
      locationId = location.id;
    });

    it('should toggle persistent to true', async () => {
      const response = await request(app)
        .patch(`/api/admin/locations/${locationId}/persistent`)
        .set('Authorization', `Bearer ${authToken}`)
        .send({ persistent: true })
        .expect(200);

      expect(response.body).toHaveProperty('message');
      expect(response.body.message).toBe('Persistent status updated successfully');
      expect(response.body.persistent).toBe(true);
    });

    it('should toggle persistent to false', async () => {
      const response = await request(app)
        .patch(`/api/admin/locations/${locationId}/persistent`)
        .set('Authorization', `Bearer ${authToken}`)
        .send({ persistent: false })
        .expect(200);

      expect(response.body).toHaveProperty('message');
      expect(response.body.message).toBe('Persistent status updated successfully');
      expect(response.body.persistent).toBe(false);
    });

    it('should handle non-existent location', async () => {
      const response = await request(app)
        .patch('/api/admin/locations/99999/persistent')
        .set('Authorization', `Bearer ${authToken}`)
        .send({ persistent: true })
        .expect(404);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Location not found');
    });

    it('should validate persistent field', async () => {
      const response = await request(app)
        .patch(`/api/admin/locations/${locationId}/persistent`)
        .set('Authorization', `Bearer ${authToken}`)
        .send({})
        .expect(400);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Persistent value must be a boolean');
    });
  });

  describe('DELETE /api/admin/locations/:id', () => {
    let locationId: number;

    beforeEach(async () => {
      const location = await locationModel.create({
        address: 'To Be Deleted'
      });
      locationId = location.id;
    });

    it('should delete location successfully', async () => {
      const response = await request(app)
        .delete(`/api/admin/locations/${locationId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(response.body).toHaveProperty('message');
      expect(response.body.message).toBe('Location deleted successfully');
    });

    it('should handle non-existent location', async () => {
      const response = await request(app)
        .delete('/api/admin/locations/99999')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(404);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Location not found');
    });
  });

  describe('GET /api/admin/profanity-words', () => {
    beforeEach(async () => {
      await profanityWordModel.create('word1', 'low', 'test');
      await profanityWordModel.create('word2', 'high', 'offensive');
    });

    it('should return all profanity words', async () => {
      const response = await request(app)
        .get('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(Array.isArray(response.body)).toBe(true);
      expect(response.body).toHaveLength(2);
      expect(response.body[0]).toHaveProperty('id');
      expect(response.body[0]).toHaveProperty('word');
      expect(response.body[0]).toHaveProperty('severity');
      expect(response.body[0]).toHaveProperty('category');
    });
  });

  describe('POST /api/admin/profanity-words', () => {
    it('should create new profanity word', async () => {
      const wordData = {
        word: 'newbadword',
        severity: 'medium',
        category: 'test'
      };

      const response = await request(app)
        .post('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .send(wordData)
        .expect(200);

      expect(response.body).toHaveProperty('id');
      expect(response.body.word).toBe('newbadword');
      expect(response.body.severity).toBe('medium');
      expect(response.body.category).toBe('test');
    });

    it('should validate required fields', async () => {
      const response = await request(app)
        .post('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .send({})
        .expect(400);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Word is required and must be a non-empty string');
    });

    it('should handle duplicate words', async () => {
      await profanityWordModel.create('duplicate', 'low', 'test');

      const response = await request(app)
        .post('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .send({
          word: 'duplicate',
          severity: 'high',
          category: 'test'
        })
        .expect(409);

      expect(response.body).toHaveProperty('error');
    });
  });

  describe('PUT /api/admin/profanity-words/:id', () => {
    let wordId: number;

    beforeEach(async () => {
      const word = await profanityWordModel.create('original', 'low', 'test');
      wordId = word.id;
    });

    it('should update profanity word successfully', async () => {
      const updateData = {
        word: 'updated',
        severity: 'high',
        category: 'updated'
      };

      const response = await request(app)
        .put(`/api/admin/profanity-words/${wordId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .send(updateData)
        .expect(200);

      expect(response.body).toHaveProperty('updated');
      expect(response.body.updated).toBe(true);
    });

    it('should handle non-existent word', async () => {
      const response = await request(app)
        .put('/api/admin/profanity-words/99999')
        .set('Authorization', `Bearer ${authToken}`)
        .send({
          word: 'test',
          severity: 'low',
          category: 'test'
        })
        .expect(404);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Word not found');
    });

    it('should validate required fields', async () => {
      const response = await request(app)
        .put(`/api/admin/profanity-words/${wordId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .send({})
        .expect(400);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Word is required and must be a non-empty string');
    });
  });

  describe('DELETE /api/admin/profanity-words/:id', () => {
    let wordId: number;

    beforeEach(async () => {
      const word = await profanityWordModel.create('tobedeleted', 'low', 'test');
      wordId = word.id;
    });

    it('should delete profanity word successfully', async () => {
      const response = await request(app)
        .delete(`/api/admin/profanity-words/${wordId}`)
        .set('Authorization', `Bearer ${authToken}`)
        .expect(200);

      expect(response.body).toHaveProperty('deleted');
      expect(response.body.deleted).toBe(true);
    });

    it('should handle non-existent word', async () => {
      const response = await request(app)
        .delete('/api/admin/profanity-words/99999')
        .set('Authorization', `Bearer ${authToken}`)
        .expect(404);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Word not found');
    });
  });

  describe('Error handling', () => {
    it('should handle database errors gracefully', async () => {
      // Create a new app with broken database to simulate error
      const brokenApp = express();
      brokenApp.use(express.json());

      // Create a broken location model that throws errors
      const brokenLocationModel = {
        getAll: jest.fn().mockRejectedValue(new Error('Database error'))
      };

      const mockAuthMiddleware = (req: any, res: any, next: any) => {
        next(); // Always pass auth for broken app test
      };

      brokenApp.use('/api/admin', adminRoutes(brokenLocationModel as any, profanityWordModel, profanityFilterService, mockAuthMiddleware));

      // Login to get auth token for broken app
      const loginResponse = await request(brokenApp)
        .post('/api/admin/login')
        .send({ password: 'test_admin_password' });

      const brokenAuthToken = loginResponse.body.token;

      const response = await request(brokenApp)
        .get('/api/admin/locations')
        .set('Authorization', `Bearer ${brokenAuthToken}`)
        .expect(500);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Internal server error');
    });

    it('should handle malformed JSON in request body', async () => {
      const response = await request(app)
        .post('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .set('Content-Type', 'application/json')
        .send('{"word": "test"') // Missing closing brace
        .expect(400);

      // Should return bad request for malformed JSON
    });

    it('should handle missing content-type header', async () => {
      const response = await request(app)
        .post('/api/admin/profanity-words')
        .set('Authorization', `Bearer ${authToken}`)
        .send('word=test&severity=low&category=test')
        .expect(400);

      // Should handle form data appropriately or reject it
    });
  });

  describe('Authorization edge cases', () => {
    it('should handle malformed authorization header', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', 'InvalidFormat')
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Access denied');
    });

    it('should handle missing bearer prefix', async () => {
      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', authToken)
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Access denied');
    });

    it('should handle expired/tampered tokens gracefully', async () => {
      const tamperedToken = authToken.slice(0, -5) + 'XXXXX';

      const response = await request(app)
        .get('/api/admin/locations')
        .set('Authorization', `Bearer ${tamperedToken}`)
        .expect(401);

      expect(response.body).toHaveProperty('error');
      expect(response.body.error).toBe('Invalid token');
    });
  });
});