const request = require('supertest');
const app = require('../app');
const { prisma } = require('../utils/db');
const { hashPassword, generateToken } = require('../utils/auth');

// Test data
let testUser1, testUser2, testUser3, testEvent, testToken1, testToken2, testToken3;
let testMatch;

// Setup test data
beforeAll(async () => {
  // Clean up
  await prisma.rating.deleteMany({});
  await prisma.message.deleteMany({});
  await prisma.match.deleteMany({});
  await prisma.chatRoom.deleteMany({});
  await prisma.eventParticipant.deleteMany({});
  await prisma.event.deleteMany({});
  await prisma.user.deleteMany({});

  // Create test users
  testUser1 = await prisma.user.create({
    data: {
      username: 'john_dancer',
      email: 'john@example.com',
      passwordHash: await hashPassword('password123'),
      emailVerified: true,
      firstName: 'John',
      lastName: 'Doe',
    },
  });

  testUser2 = await prisma.user.create({
    data: {
      username: 'sarah_swings',
      email: 'sarah@example.com',
      passwordHash: await hashPassword('password123'),
      emailVerified: true,
      firstName: 'Sarah',
      lastName: 'Smith',
    },
  });

  testUser3 = await prisma.user.create({
    data: {
      username: 'mike_moves',
      email: 'mike@example.com',
      passwordHash: await hashPassword('password123'),
      emailVerified: true,
      firstName: 'Mike',
      lastName: 'Johnson',
    },
  });

  // Generate tokens
  testToken1 = generateToken({ userId: testUser1.id });
  testToken2 = generateToken({ userId: testUser2.id });
  testToken3 = generateToken({ userId: testUser3.id });

  // Create test event
  testEvent = await prisma.event.create({
    data: {
      name: 'Test Dance Festival',
      slug: 'test-dance-festival',
      location: 'Test City',
      startDate: new Date('2025-06-01'),
      endDate: new Date('2025-06-03'),
      description: 'Test event',
      worldsdcId: '12345',
    },
  });

  // Add users as participants
  await prisma.eventParticipant.createMany({
    data: [
      { userId: testUser1.id, eventId: testEvent.id },
      { userId: testUser2.id, eventId: testEvent.id },
      { userId: testUser3.id, eventId: testEvent.id },
    ],
  });
});

afterAll(async () => {
  // Clean up
  await prisma.rating.deleteMany({});
  await prisma.message.deleteMany({});
  await prisma.match.deleteMany({});
  await prisma.chatRoom.deleteMany({});
  await prisma.eventParticipant.deleteMany({});
  await prisma.event.deleteMany({});
  await prisma.user.deleteMany({});
  await prisma.$disconnect();
});

describe('Matches API Tests', () => {
  describe('POST /api/matches', () => {
    it('should create a match request successfully', async () => {
      const response = await request(app)
        .post('/api/matches')
        .set('Authorization', `Bearer ${testToken1}`)
        .send({
          targetUserId: testUser2.id,
          eventSlug: testEvent.slug,
        })
        .expect('Content-Type', /json/)
        .expect(201);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('slug');
      expect(response.body.data).toHaveProperty('status', 'pending');
      expect(response.body.data.slug).toMatch(/^[a-z0-9]+$/); // CUID format

      // Save for later tests
      testMatch = response.body.data;
    });

    it('should reject match request without authentication', async () => {
      const response = await request(app)
        .post('/api/matches')
        .send({
          targetUserId: testUser2.id,
          eventSlug: testEvent.slug,
        })
        .expect('Content-Type', /json/)
        .expect(401);

      expect(response.body).toHaveProperty('success', false);
    });

    it('should reject match request to yourself', async () => {
      const response = await request(app)
        .post('/api/matches')
        .set('Authorization', `Bearer ${testToken1}`)
        .send({
          targetUserId: testUser1.id, // Same as authenticated user
          eventSlug: testEvent.slug,
        })
        .expect('Content-Type', /json/)
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('yourself');
    });

    it('should reject match request with invalid event', async () => {
      const response = await request(app)
        .post('/api/matches')
        .set('Authorization', `Bearer ${testToken1}`)
        .send({
          targetUserId: testUser2.id,
          eventSlug: 'non-existent-event',
        })
        .expect('Content-Type', /json/)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
    });
  });

  describe('GET /api/matches', () => {
    it('should list all matches for authenticated user', async () => {
      const response = await request(app)
        .get('/api/matches')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);
      expect(response.body.data.length).toBeGreaterThan(0);

      const match = response.body.data[0];
      expect(match).toHaveProperty('slug');
      expect(match).toHaveProperty('partner');
      expect(match).toHaveProperty('event');
      expect(match).toHaveProperty('status');
    });

    it('should filter matches by event slug', async () => {
      const response = await request(app)
        .get(`/api/matches?eventSlug=${testEvent.slug}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);

      if (response.body.data.length > 0) {
        expect(response.body.data[0].event.slug).toBe(testEvent.slug);
      }
    });

    it('should filter matches by status', async () => {
      const response = await request(app)
        .get('/api/matches?status=pending')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);

      response.body.data.forEach(match => {
        expect(match.status).toBe('pending');
      });
    });
  });

  describe('GET /api/matches/:slug', () => {
    it('should get match details by slug', async () => {
      const response = await request(app)
        .get(`/api/matches/${testMatch.slug}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('slug', testMatch.slug);
      expect(response.body.data).toHaveProperty('partner');
      expect(response.body.data).toHaveProperty('event');
      expect(response.body.data).toHaveProperty('hasRated', false);
      expect(response.body.data).toHaveProperty('isInitiator');
    });

    it('should reject access to match by non-participant', async () => {
      // Create third user
      const testUser3 = await prisma.user.create({
        data: {
          username: 'outsider',
          email: 'outsider@example.com',
          passwordHash: await hashPassword('password123'),
          emailVerified: true,
        },
      });

      const testToken3 = generateToken({ userId: testUser3.id });

      const response = await request(app)
        .get(`/api/matches/${testMatch.slug}`)
        .set('Authorization', `Bearer ${testToken3}`)
        .expect('Content-Type', /json/)
        .expect(403);

      expect(response.body).toHaveProperty('success', false);

      // Clean up
      await prisma.user.delete({ where: { id: testUser3.id } });
    });

    it('should return 404 for non-existent match slug', async () => {
      const response = await request(app)
        .get('/api/matches/nonexistentslug123')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
    });
  });

  describe('PUT /api/matches/:slug/accept', () => {
    it('should accept a match request', async () => {
      const response = await request(app)
        .put(`/api/matches/${testMatch.slug}/accept`)
        .set('Authorization', `Bearer ${testToken2}`) // User 2 accepts
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('status', 'accepted');
      expect(response.body.data).toHaveProperty('roomId');
    });

    it('should reject accepting already accepted match', async () => {
      const response = await request(app)
        .put(`/api/matches/${testMatch.slug}/accept`)
        .set('Authorization', `Bearer ${testToken2}`)
        .expect('Content-Type', /json/)
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('already accepted');
    });

    it('should reject accepting match by initiator', async () => {
      // Create new match for this test (with testUser3)
      const newMatchRes = await request(app)
        .post('/api/matches')
        .set('Authorization', `Bearer ${testToken1}`)
        .send({
          targetUserId: testUser3.id,
          eventSlug: testEvent.slug,
        })
        .expect(201);

      const newMatch = newMatchRes.body.data;
      expect(newMatch).toHaveProperty('slug');

      const response = await request(app)
        .put(`/api/matches/${newMatch.slug}/accept`)
        .set('Authorization', `Bearer ${testToken1}`) // Initiator tries to accept
        .expect('Content-Type', /json/)
        .expect(403);

      expect(response.body).toHaveProperty('success', false);

      // Clean up
      await prisma.match.delete({ where: { slug: newMatch.slug } });
    });
  });

  describe('GET /api/matches/:slug/messages', () => {
    it('should get match messages (empty initially)', async () => {
      const response = await request(app)
        .get(`/api/matches/${testMatch.slug}/messages`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);
    });
  });

  describe('DELETE /api/matches/:slug', () => {
    it('should delete/reject a match request', async () => {
      // Create new match for deletion test (with a different user)
      const newMatchRes = await request(app)
        .post('/api/matches')
        .set('Authorization', `Bearer ${testToken2}`)
        .send({
          targetUserId: testUser3.id,
          eventSlug: testEvent.slug,
        })
        .expect(201);

      const newMatch = newMatchRes.body.data;
      expect(newMatch).toHaveProperty('slug');

      const response = await request(app)
        .delete(`/api/matches/${newMatch.slug}`)
        .set('Authorization', `Bearer ${testToken2}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body).toHaveProperty('message');

      // Verify deletion
      const match = await prisma.match.findUnique({
        where: { slug: newMatch.slug },
      });
      expect(match).toBeNull();
    });
  });
});

describe('Ratings API Tests', () => {
  describe('POST /api/matches/:slug/ratings', () => {
    it('should create a rating successfully', async () => {
      const response = await request(app)
        .post(`/api/matches/${testMatch.slug}/ratings`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({
          score: 5,
          comment: 'Great partner!',
          wouldCollaborateAgain: true,
        })
        .expect('Content-Type', /json/)
        .expect(201);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('score', 5);
      expect(response.body.data).toHaveProperty('comment', 'Great partner!');
      expect(response.body.data).toHaveProperty('wouldCollaborateAgain', true);
    });

    it('should reject duplicate rating from same user', async () => {
      const response = await request(app)
        .post(`/api/matches/${testMatch.slug}/ratings`)
        .set('Authorization', `Bearer ${testToken1}`) // Same user tries again
        .send({
          score: 4,
          comment: 'Second rating',
          wouldCollaborateAgain: false,
        })
        .expect('Content-Type', /json/)
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('already rated');
    });

    it('should reject rating with invalid score', async () => {
      const response = await request(app)
        .post(`/api/matches/${testMatch.slug}/ratings`)
        .set('Authorization', `Bearer ${testToken2}`)
        .send({
          score: 6, // Invalid (must be 1-5)
          comment: 'Test',
          wouldCollaborateAgain: true,
        })
        .expect('Content-Type', /json/)
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
    });

    it('should create rating without comment (optional)', async () => {
      const response = await request(app)
        .post(`/api/matches/${testMatch.slug}/ratings`)
        .set('Authorization', `Bearer ${testToken2}`)
        .send({
          score: 4,
          wouldCollaborateAgain: true,
        })
        .expect('Content-Type', /json/)
        .expect(201);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('score', 4);
      expect(response.body.data).toHaveProperty('comment', null);
    });

    it('should auto-complete match when both users rate', async () => {
      // Both users have now rated, check match status
      const matchRes = await request(app)
        .get(`/api/matches/${testMatch.slug}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      expect(matchRes.body.data.status).toBe('completed');
    });

    it('should update hasRated flag after rating', async () => {
      const response = await request(app)
        .get(`/api/matches/${testMatch.slug}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      expect(response.body.data.hasRated).toBe(true);
    });
  });

  describe('GET /api/users/:username/ratings', () => {
    it('should get user ratings', async () => {
      const response = await request(app)
        .get(`/api/users/${testUser2.username}/ratings`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('username', testUser2.username);
      expect(response.body.data).toHaveProperty('averageRating');
      expect(response.body.data).toHaveProperty('ratingsCount');
      expect(response.body.data).toHaveProperty('ratings');
      expect(response.body.data.ratings).toBeInstanceOf(Array);

      if (response.body.data.ratings.length > 0) {
        const rating = response.body.data.ratings[0];
        expect(rating).toHaveProperty('score');
        expect(rating).toHaveProperty('rater');
        expect(rating).toHaveProperty('event');
        expect(rating).toHaveProperty('createdAt');
      }
    });

    it('should calculate average rating correctly', async () => {
      const response = await request(app)
        .get(`/api/users/${testUser2.username}/ratings`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      const { averageRating, ratingsCount } = response.body.data;

      if (ratingsCount > 0) {
        expect(parseFloat(averageRating)).toBeGreaterThan(0);
        expect(parseFloat(averageRating)).toBeLessThanOrEqual(5);
      }
    });

    it('should return 404 for non-existent user', async () => {
      const response = await request(app)
        .get('/api/users/nonexistentuser/ratings')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
    });
  });
});