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;
let testToken1, testToken2, testToken3;
let testEvent, testEvent2;
let testDivision, testCompetitionType;
let checkinToken;

// Setup test data
beforeAll(async () => {
  // Clean up
  await prisma.eventUserHeat.deleteMany({});
  await prisma.rating.deleteMany({});
  await prisma.message.deleteMany({});
  await prisma.match.deleteMany({});
  await prisma.chatRoom.deleteMany({});
  await prisma.eventCheckinToken.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_blues',
      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 });

  // Get or create division and competition type
  testDivision = await prisma.division.findFirst();
  testCompetitionType = await prisma.competitionType.findFirst();

  // If they don't exist, create them
  if (!testDivision) {
    testDivision = await prisma.division.create({
      data: {
        name: 'Intermediate',
        abbreviation: 'INT',
        displayOrder: 1,
      },
    });
  }

  if (!testCompetitionType) {
    testCompetitionType = await prisma.competitionType.create({
      data: {
        name: 'Jack & Jill',
        abbreviation: 'J&J',
      },
    });
  }

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

  testEvent2 = await prisma.event.create({
    data: {
      name: 'Another Dance Event',
      slug: 'another-dance-event',
      location: 'Another City',
      startDate: new Date('2025-07-15'),
      endDate: new Date('2025-07-17'),
      description: 'Another test event',
      worldsdcId: 'another-2025',
    },
  });

  // Create checkin token for testEvent
  checkinToken = await prisma.eventCheckinToken.create({
    data: {
      eventId: testEvent.id,
      token: 'test-checkin-token-123',
    },
  });

  // Add testUser1 as participant to testEvent
  await prisma.eventParticipant.create({
    data: {
      userId: testUser1.id,
      eventId: testEvent.id,
    },
  });

  // Create chat room for testEvent
  await prisma.chatRoom.create({
    data: {
      eventId: testEvent.id,
      type: 'event',
    },
  });
}, 30000);

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

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

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

      const event = response.body.data[0];
      expect(event).toHaveProperty('slug');
      expect(event).toHaveProperty('name');
      expect(event).toHaveProperty('location');
      expect(event).toHaveProperty('startDate');
      expect(event).toHaveProperty('isJoined');
      expect(event).toHaveProperty('participantsCount');
    });

    it('should show joined events first', async () => {
      const response = await request(app)
        .get('/api/events')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      // testUser1 is participant of testEvent, so it should be first
      const joinedEvents = response.body.data.filter(e => e.isJoined);
      expect(joinedEvents.length).toBeGreaterThan(0);
      expect(response.body.data[0].isJoined).toBe(true);
    });

    it('should reject request without authentication', async () => {
      const response = await request(app)
        .get('/api/events')
        .expect('Content-Type', /json/)
        .expect(401);

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

  describe('GET /api/events/:slug', () => {
    it('should get event details by slug', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('slug', testEvent.slug);
      expect(response.body.data).toHaveProperty('name', testEvent.name);
      expect(response.body.data).toHaveProperty('location');
      expect(response.body.data).toHaveProperty('startDate');
      expect(response.body.data).toHaveProperty('endDate');
    });

    it('should return 404 for non-existent event', async () => {
      const response = await request(app)
        .get('/api/events/non-existent-slug')
        .expect('Content-Type', /json/)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('not found');
    });

    it('should work without authentication', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}`)
        .expect(200);

      expect(response.body.success).toBe(true);
    });
  });

  describe('POST /api/events/checkin/:token', () => {
    it('should check-in user to event successfully', async () => {
      const response = await request(app)
        .post(`/api/events/checkin/${checkinToken.token}`)
        .set('Authorization', `Bearer ${testToken2}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('event');
      expect(response.body.data.event.slug).toBe(testEvent.slug);

      // Verify user is now a participant
      const participant = await prisma.eventParticipant.findUnique({
        where: {
          userId_eventId: {
            userId: testUser2.id,
            eventId: testEvent.id,
          },
        },
      });
      expect(participant).toBeTruthy();
    });

    it('should handle already checked-in user', async () => {
      const response = await request(app)
        .post(`/api/events/checkin/${checkinToken.token}`)
        .set('Authorization', `Bearer ${testToken1}`) // testUser1 is already participant
        .expect(200);

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

    it('should reject invalid checkin token', async () => {
      const response = await request(app)
        .post('/api/events/checkin/invalid-token-xyz')
        .set('Authorization', `Bearer ${testToken3}`)
        .expect('Content-Type', /json/)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('Invalid check-in token');
    });

    it('should reject checkin without authentication', async () => {
      const response = await request(app)
        .post(`/api/events/checkin/${checkinToken.token}`)
        .expect(401);

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

  describe('GET /api/events/:slug/details', () => {
    it('should get detailed event information for participant', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/details`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('event');
      expect(response.body.data.event.slug).toBe(testEvent.slug);
      expect(response.body.data).toHaveProperty('participants');
    });

    it('should return 404 for non-existent event', async () => {
      const response = await request(app)
        .get('/api/events/non-existent/details')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(404);

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

    it('should work for any authenticated user (no participant check)', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/details`)
        .set('Authorization', `Bearer ${testToken3}`) // testUser3 is not participant
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toHaveProperty('event');
      expect(response.body.data).toHaveProperty('participants');
    });
  });

  describe('DELETE /api/events/:slug/leave', () => {
    it('should allow participant to leave event', async () => {
      // testUser1 is already a participant from setup, use them instead
      const response = await request(app)
        .delete(`/api/events/${testEvent.slug}/leave`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

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

      // Verify user is no longer a participant
      const participant = await prisma.eventParticipant.findUnique({
        where: {
          userId_eventId: {
            userId: testUser1.id,
            eventId: testEvent.id,
          },
        },
      });
      expect(participant).toBeNull();

      // Re-add testUser1 for subsequent tests
      await prisma.eventParticipant.create({
        data: {
          userId: testUser1.id,
          eventId: testEvent.id,
        },
      });
    });

    it('should return 404 for non-existent event', async () => {
      const response = await request(app)
        .delete('/api/events/non-existent/leave')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(404);

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

    it('should return 400 if user is not a participant', async () => {
      const response = await request(app)
        .delete(`/api/events/${testEvent2.slug}/leave`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(400);

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

  describe('GET /api/events/:slug/messages', () => {
    it('should get event chat messages (empty initially)', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/messages`)
        .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).toHaveProperty('hasMore');
    });

    it('should return 404 for non-existent event', async () => {
      const response = await request(app)
        .get('/api/events/non-existent/messages')
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(404);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('not found');
    });

    it('should reject without authentication', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/messages`)
        .expect(401);

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

  describe('POST /api/events/:slug/heats', () => {
    it('should add heats for participant', async () => {
      const heats = [
        {
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 1,
          role: 'Leader',
        },
        {
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 2,
          role: 'Follower',
        },
      ];

      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({ heats })
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);
      expect(response.body.data.length).toBe(2);
      expect(response.body.data[0]).toHaveProperty('heatNumber');
      expect(response.body.data[0]).toHaveProperty('role');
    });

    it('should reject invalid heats array', async () => {
      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({ heats: [] })
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('non-empty array');
    });

    it('should reject heats with missing fields', async () => {
      const heats = [
        {
          divisionId: testDivision.id,
          // missing competitionTypeId and heatNumber
        },
      ];

      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({ heats })
        .expect(400);

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

    it('should reject invalid heat number', async () => {
      const heats = [
        {
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 10, // Invalid (must be 1-9)
        },
      ];

      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({ heats })
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('between 1 and 9');
    });

    it('should reject invalid role', async () => {
      const heats = [
        {
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 1,
          role: 'InvalidRole',
        },
      ];

      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken1}`)
        .send({ heats })
        .expect(400);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('Leader or Follower');
    });

    it('should return 403 for non-participant', async () => {
      const heats = [
        {
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 1,
        },
      ];

      const response = await request(app)
        .post(`/api/events/${testEvent.slug}/heats`)
        .set('Authorization', `Bearer ${testToken3}`)
        .send({ heats })
        .expect(403);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('must be a participant');
    });
  });

  describe('GET /api/events/:slug/heats/me', () => {
    it('should get user\'s heats for event', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/heats/me`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      expect(response.body.data).toBeInstanceOf(Array);
      // testUser1 has heats from previous test
      expect(response.body.data.length).toBeGreaterThan(0);
    });

    it('should return empty array for user without heats', async () => {
      // Add testUser3 as participant first
      await prisma.eventParticipant.create({
        data: {
          userId: testUser3.id,
          eventId: testEvent.id,
        },
      });

      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/heats/me`)
        .set('Authorization', `Bearer ${testToken3}`)
        .expect(200);

      expect(response.body.success).toBe(true);
      expect(response.body.data).toEqual([]);
    });

    it('should work for any authenticated user (no participant check)', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent2.slug}/heats/me`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      // testUser1 has no heats for testEvent2, so data should be empty
      expect(response.body.data).toEqual([]);
      expect(response.body.count).toBe(0);
    });
  });

  describe('GET /api/events/:slug/heats/all', () => {
    it('should get all heats for event', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/heats/all`)
        .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);

      if (response.body.data.length > 0) {
        const userHeats = response.body.data[0];
        // Response is grouped by user
        expect(userHeats).toHaveProperty('userId');
        expect(userHeats).toHaveProperty('username');
        expect(userHeats).toHaveProperty('heats');
        expect(userHeats.heats).toBeInstanceOf(Array);

        if (userHeats.heats.length > 0) {
          const heat = userHeats.heats[0];
          expect(heat).toHaveProperty('division');
          expect(heat).toHaveProperty('competitionType');
          expect(heat).toHaveProperty('heatNumber');
        }
      }
    });

    it('should filter by division', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent.slug}/heats/all?divisionId=${testDivision.id}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      expect(response.body.success).toBe(true);
      // Check that all heats in all users have the correct division
      response.body.data.forEach(userHeats => {
        userHeats.heats.forEach(heat => {
          expect(heat.division.id).toBe(testDivision.id);
        });
      });
    });

    it('should work for any authenticated user (no participant check)', async () => {
      const response = await request(app)
        .get(`/api/events/${testEvent2.slug}/heats/all`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(200);

      expect(response.body).toHaveProperty('success', true);
      // testEvent2 has no heats, so data should be empty
      expect(response.body.data).toEqual([]);
    });
  });

  describe('DELETE /api/events/:slug/heats/:id', () => {
    let heatToDelete;

    beforeAll(async () => {
      // Get a heat ID for deletion
      const heats = await prisma.eventUserHeat.findMany({
        where: {
          userId: testUser1.id,
          eventId: testEvent.id,
        },
      });
      heatToDelete = heats[0];
    });

    it('should delete user\'s heat', async () => {
      const response = await request(app)
        .delete(`/api/events/${testEvent.slug}/heats/${heatToDelete.id}`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect('Content-Type', /json/)
        .expect(200);

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

      // Verify heat is deleted
      const heat = await prisma.eventUserHeat.findUnique({
        where: { id: heatToDelete.id },
      });
      expect(heat).toBeNull();
    });

    it('should return 404 for non-existent heat', async () => {
      const response = await request(app)
        .delete(`/api/events/${testEvent.slug}/heats/99999`)
        .set('Authorization', `Bearer ${testToken1}`)
        .expect(404);

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

    it('should reject deleting another user\'s heat', async () => {
      // Create a heat for testUser3
      await prisma.eventParticipant.upsert({
        where: {
          userId_eventId: {
            userId: testUser3.id,
            eventId: testEvent.id,
          },
        },
        create: {
          userId: testUser3.id,
          eventId: testEvent.id,
        },
        update: {},
      });

      const heat3 = await prisma.eventUserHeat.create({
        data: {
          userId: testUser3.id,
          eventId: testEvent.id,
          divisionId: testDivision.id,
          competitionTypeId: testCompetitionType.id,
          heatNumber: 5,
        },
      });

      const response = await request(app)
        .delete(`/api/events/${testEvent.slug}/heats/${heat3.id}`)
        .set('Authorization', `Bearer ${testToken1}`) // testUser1 tries to delete testUser3's heat
        .expect(403);

      expect(response.body).toHaveProperty('success', false);
      expect(response.body.error).toContain('your own heats');
    });
  });
});