import { Test, TestingModule } from '@nestjs/testing';
import { ReferralRelationshipRepository } from '../../../src/infrastructure/repositories/referral-relationship.repository';
import { PrismaService } from '../../../src/infrastructure/database/prisma.service';
import { MockPrismaService } from '../mocks/prisma.mock';
import { ReferralRelationship } from '../../../src/domain';

describe('ReferralRelationshipRepository (Integration)', () => {
  let repository: ReferralRelationshipRepository;
  let mockPrisma: MockPrismaService;

  beforeEach(async () => {
    mockPrisma = new MockPrismaService();

    const module: TestingModule = await Test.createTestingModule({
      providers: [
        ReferralRelationshipRepository,
        {
          provide: PrismaService,
          useValue: mockPrisma,
        },
      ],
    }).compile();

    repository = module.get<ReferralRelationshipRepository>(ReferralRelationshipRepository);
  });

  afterEach(() => {
    mockPrisma.$cleanup();
  });

  describe('save', () => {
    it('should save a new referral relationship', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      const saved = await repository.save(relationship);

      expect(saved).toBeDefined();
      expect(saved.userId).toBe(100n);
      expect(saved.referralCode).toBeDefined();
      expect(saved.referralChain).toEqual([]);
    });

    it('should save referral relationship with referrer', async () => {
      // First create the referrer
      const referrer = ReferralRelationship.create(50n, null);
      await repository.save(referrer);

      // Then create with referrer
      const relationship = ReferralRelationship.create(100n, 50n, []);
      const saved = await repository.save(relationship);

      expect(saved.userId).toBe(100n);
      expect(saved.referrerId).toBe(50n);
      expect(saved.referralChain).toContain(50n);
    });

    it('should update existing referral relationship', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      await repository.save(relationship);

      // Save again should update
      const updated = await repository.save(relationship);
      expect(updated.userId).toBe(100n);
    });
  });

  describe('findByUserId', () => {
    it('should find relationship by user ID', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      await repository.save(relationship);

      const found = await repository.findByUserId(100n);

      expect(found).toBeDefined();
      expect(found!.userId).toBe(100n);
    });

    it('should return null for non-existent user', async () => {
      const found = await repository.findByUserId(999n);
      expect(found).toBeNull();
    });
  });

  describe('findByReferralCode', () => {
    it('should find relationship by referral code', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      const saved = await repository.save(relationship);

      const found = await repository.findByReferralCode(saved.referralCode);

      expect(found).toBeDefined();
      expect(found!.userId).toBe(100n);
    });

    it('should return null for non-existent code', async () => {
      const found = await repository.findByReferralCode('NONEXISTENT');
      expect(found).toBeNull();
    });
  });

  describe('findDirectReferrals', () => {
    it('should find all direct referrals', async () => {
      // Create referrer
      const referrer = ReferralRelationship.create(50n, null);
      await repository.save(referrer);

      // Create direct referrals
      const ref1 = ReferralRelationship.create(100n, 50n, []);
      const ref2 = ReferralRelationship.create(101n, 50n, []);
      await repository.save(ref1);
      await repository.save(ref2);

      const directReferrals = await repository.findDirectReferrals(50n);

      expect(directReferrals.length).toBe(2);
      expect(directReferrals.map((r) => r.userId)).toContain(100n);
      expect(directReferrals.map((r) => r.userId)).toContain(101n);
    });

    it('should return empty array for user with no referrals', async () => {
      const referrer = ReferralRelationship.create(50n, null);
      await repository.save(referrer);

      const directReferrals = await repository.findDirectReferrals(50n);
      expect(directReferrals.length).toBe(0);
    });
  });

  describe('existsByReferralCode', () => {
    it('should return true for existing code', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      const saved = await repository.save(relationship);

      const exists = await repository.existsByReferralCode(saved.referralCode);
      expect(exists).toBe(true);
    });

    it('should return false for non-existent code', async () => {
      const exists = await repository.existsByReferralCode('NONEXISTENT');
      expect(exists).toBe(false);
    });
  });

  describe('existsByUserId', () => {
    it('should return true for existing user', async () => {
      const relationship = ReferralRelationship.create(100n, null);
      await repository.save(relationship);

      const exists = await repository.existsByUserId(100n);
      expect(exists).toBe(true);
    });

    it('should return false for non-existent user', async () => {
      const exists = await repository.existsByUserId(999n);
      expect(exists).toBe(false);
    });
  });

  describe('getReferralChain', () => {
    it('should return referral chain', async () => {
      const parentChain = [200n, 300n];
      const relationship = ReferralRelationship.create(100n, 50n, parentChain);
      await repository.save(relationship);

      const chain = await repository.getReferralChain(100n);
      expect(chain).toContain(50n);
    });

    it('should return empty array for non-existent user', async () => {
      const chain = await repository.getReferralChain(999n);
      expect(chain).toEqual([]);
    });
  });
});