import { describe, it, expect, beforeAll, beforeEach } from 'vitest';
import { RatingTestContext } from './RatingTestContext';
import { SaveRatingUseCase } from '../../../../core/rating/application/use-cases/SaveRatingUseCase';
import { GetRatingUseCase } from '../../../../core/rating/application/use-cases/GetRatingUseCase';
import { GetRatingHistoryUseCase } from '../../../../core/rating/application/use-cases/GetRatingHistoryUseCase';
import { GetRatingTrendUseCase } from '../../../../core/rating/application/use-cases/GetRatingTrendUseCase';
import { Driver } from '../../../../core/racing/domain/entities/Driver';
import { Rating } from '../../../../core/rating/domain/entities/Rating';

describe('Rating Persistence Use Cases', () => {
  let context: RatingTestContext;
  let saveRatingUseCase: SaveRatingUseCase;
  let getRatingUseCase: GetRatingUseCase;
  let getRatingHistoryUseCase: GetRatingHistoryUseCase;
  let getRatingTrendUseCase: GetRatingTrendUseCase;

  beforeAll(() => {
    context = RatingTestContext.create();
    saveRatingUseCase = new SaveRatingUseCase(
      context.ratingRepository,
      context.eventPublisher
    );
    getRatingUseCase = new GetRatingUseCase(
      context.ratingRepository
    );
    getRatingHistoryUseCase = new GetRatingHistoryUseCase(
      context.ratingRepository
    );
    getRatingTrendUseCase = new GetRatingTrendUseCase(
      context.ratingRepository
    );
  });

  beforeEach(async () => {
    await context.clear();
  });

  describe('SaveRatingUseCase', () => {
    describe('UseCase - Success Path', () => {
      it('should save rating successfully', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: A rating to save
        const rating = Rating.create({
          driverId,
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date()
        });

        // When: SaveRatingUseCase.execute() is called
        const result = await saveRatingUseCase.execute({ rating });

        // Then: The rating should be saved
        expect(result.isOk()).toBe(true);

        // And: EventPublisher should emit RatingSavedEvent
        expect(context.eventPublisher.events).toContainEqual(
          expect.objectContaining({ type: 'RatingSavedEvent' })
        );
      });

      it('should update existing rating', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: An initial rating
        const initialRating = Rating.create({
          driverId,
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date(Date.now() - 86400000)
        });
        await context.ratingRepository.save(initialRating);

        // Given: An updated rating
        const updatedRating = Rating.create({
          driverId,
          rating: 1550,
          components: {
            resultsStrength: 85,
            consistency: 80,
            cleanDriving: 92,
            racecraft: 88,
            reliability: 96,
            teamContribution: 75
          },
          timestamp: new Date()
        });

        // When: SaveRatingUseCase.execute() is called
        const result = await saveRatingUseCase.execute({ rating: updatedRating });

        // Then: The rating should be updated
        expect(result.isOk()).toBe(true);

        // And: EventPublisher should emit RatingUpdatedEvent
        expect(context.eventPublisher.events).toContainEqual(
          expect.objectContaining({ type: 'RatingUpdatedEvent' })
        );
      });
    });

    describe('UseCase - Error Handling', () => {
      it('should handle missing driver', async () => {
        // Given: A rating with non-existent driver
        const rating = Rating.create({
          driverId: 'd999',
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date()
        });

        // When: SaveRatingUseCase.execute() is called
        const result = await saveRatingUseCase.execute({ rating });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });
    });
  });

  describe('GetRatingUseCase', () => {
    describe('UseCase - Success Path', () => {
      it('should retrieve rating for driver', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: A saved rating
        const rating = Rating.create({
          driverId,
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date()
        });
        await context.ratingRepository.save(rating);

        // When: GetRatingUseCase.execute() is called
        const result = await getRatingUseCase.execute({ driverId });

        // Then: The rating should be retrieved
        expect(result.isOk()).toBe(true);
        const retrievedRating = result.unwrap();
        expect(retrievedRating.driverId.toString()).toBe(driverId);
        expect(retrievedRating.rating).toBe(1500);
        expect(retrievedRating.components.resultsStrength).toBe(80);
      });

      it('should return latest rating for driver', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: Multiple ratings for the same driver
        const oldRating = Rating.create({
          driverId,
          rating: 1400,
          components: {
            resultsStrength: 70,
            consistency: 65,
            cleanDriving: 80,
            racecraft: 75,
            reliability: 85,
            teamContribution: 60
          },
          timestamp: new Date(Date.now() - 86400000)
        });
        await context.ratingRepository.save(oldRating);

        const newRating = Rating.create({
          driverId,
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date()
        });
        await context.ratingRepository.save(newRating);

        // When: GetRatingUseCase.execute() is called
        const result = await getRatingUseCase.execute({ driverId });

        // Then: The latest rating should be retrieved
        expect(result.isOk()).toBe(true);
        const retrievedRating = result.unwrap();
        expect(retrievedRating.driverId.toString()).toBe(driverId);
        expect(retrievedRating.rating).toBe(1500);
        expect(retrievedRating.timestamp.getTime()).toBe(newRating.timestamp.getTime());
      });
    });

    describe('UseCase - Error Handling', () => {
      it('should handle missing driver', async () => {
        // Given: A non-existent driver
        const driverId = 'd999';

        // When: GetRatingUseCase.execute() is called
        const result = await getRatingUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });

      it('should handle driver with no rating', async () => {
        // Given: A driver with no rating
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // When: GetRatingUseCase.execute() is called
        const result = await getRatingUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });
    });
  });

  describe('GetRatingHistoryUseCase', () => {
    describe('UseCase - Success Path', () => {
      it('should retrieve rating history for driver', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: Multiple ratings for the same driver
        for (let i = 1; i <= 5; i++) {
          const rating = Rating.create({
            driverId,
            rating: 1400 + (i * 20),
            components: {
              resultsStrength: 70 + (i * 2),
              consistency: 65 + (i * 2),
              cleanDriving: 80 + (i * 2),
              racecraft: 75 + (i * 2),
              reliability: 85 + (i * 2),
              teamContribution: 60 + (i * 2)
            },
            timestamp: new Date(Date.now() - (i * 86400000))
          });
          await context.ratingRepository.save(rating);
        }

        // When: GetRatingHistoryUseCase.execute() is called
        const result = await getRatingHistoryUseCase.execute({ driverId });

        // Then: The rating history should be retrieved
        expect(result.isOk()).toBe(true);
        const history = result.unwrap();
        expect(history).toHaveLength(5);
        expect(history[0].rating).toBe(1500);
        expect(history[4].rating).toBe(1420);
      });

      it('should retrieve rating history with limit', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: Multiple ratings for the same driver
        for (let i = 1; i <= 10; i++) {
          const rating = Rating.create({
            driverId,
            rating: 1400 + (i * 10),
            components: {
              resultsStrength: 70 + i,
              consistency: 65 + i,
              cleanDriving: 80 + i,
              racecraft: 75 + i,
              reliability: 85 + i,
              teamContribution: 60 + i
            },
            timestamp: new Date(Date.now() - (i * 86400000))
          });
          await context.ratingRepository.save(rating);
        }

        // When: GetRatingHistoryUseCase.execute() is called with limit
        const result = await getRatingHistoryUseCase.execute({ driverId, limit: 5 });

        // Then: The rating history should be retrieved with limit
        expect(result.isOk()).toBe(true);
        const history = result.unwrap();
        expect(history).toHaveLength(5);
      });
    });

    describe('UseCase - Error Handling', () => {
      it('should handle missing driver', async () => {
        // Given: A non-existent driver
        const driverId = 'd999';

        // When: GetRatingHistoryUseCase.execute() is called
        const result = await getRatingHistoryUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });

      it('should handle driver with no rating history', async () => {
        // Given: A driver with no rating
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // When: GetRatingHistoryUseCase.execute() is called
        const result = await getRatingHistoryUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });
    });
  });

  describe('GetRatingTrendUseCase', () => {
    describe('UseCase - Success Path', () => {
      it('should retrieve rating trend for driver', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: Multiple ratings for the same driver
        for (let i = 1; i <= 5; i++) {
          const rating = Rating.create({
            driverId,
            rating: 1400 + (i * 20),
            components: {
              resultsStrength: 70 + (i * 2),
              consistency: 65 + (i * 2),
              cleanDriving: 80 + (i * 2),
              racecraft: 75 + (i * 2),
              reliability: 85 + (i * 2),
              teamContribution: 60 + (i * 2)
            },
            timestamp: new Date(Date.now() - (i * 86400000))
          });
          await context.ratingRepository.save(rating);
        }

        // When: GetRatingTrendUseCase.execute() is called
        const result = await getRatingTrendUseCase.execute({ driverId });

        // Then: The rating trend should be retrieved
        expect(result.isOk()).toBe(true);
        const trend = result.unwrap();
        expect(trend.driverId.toString()).toBe(driverId);
        expect(trend.trend).toBeDefined();
        expect(trend.trend.length).toBeGreaterThan(0);
        expect(trend.change).toBeGreaterThan(0);
        expect(trend.changePercentage).toBeGreaterThan(0);
      });

      it('should calculate trend over specific period', async () => {
        // Given: A driver
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        // Given: Multiple ratings for the same driver
        for (let i = 1; i <= 10; i++) {
          const rating = Rating.create({
            driverId,
            rating: 1400 + (i * 10),
            components: {
              resultsStrength: 70 + i,
              consistency: 65 + i,
              cleanDriving: 80 + i,
              racecraft: 75 + i,
              reliability: 85 + i,
              teamContribution: 60 + i
            },
            timestamp: new Date(Date.now() - (i * 86400000))
          });
          await context.ratingRepository.save(rating);
        }

        // When: GetRatingTrendUseCase.execute() is called with period
        const result = await getRatingTrendUseCase.execute({ driverId, period: 7 });

        // Then: The rating trend should be retrieved for the period
        expect(result.isOk()).toBe(true);
        const trend = result.unwrap();
        expect(trend.driverId.toString()).toBe(driverId);
        expect(trend.trend.length).toBeLessThanOrEqual(7);
      });
    });

    describe('UseCase - Error Handling', () => {
      it('should handle missing driver', async () => {
        // Given: A non-existent driver
        const driverId = 'd999';

        // When: GetRatingTrendUseCase.execute() is called
        const result = await getRatingTrendUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });

      it('should handle driver with insufficient rating history', async () => {
        // Given: A driver with only one rating
        const driverId = 'd1';
        const driver = Driver.create({ id: driverId, iracingId: '100', name: 'John Doe', country: 'US' });
        await context.driverRepository.create(driver);

        const rating = Rating.create({
          driverId,
          rating: 1500,
          components: {
            resultsStrength: 80,
            consistency: 75,
            cleanDriving: 90,
            racecraft: 85,
            reliability: 95,
            teamContribution: 70
          },
          timestamp: new Date()
        });
        await context.ratingRepository.save(rating);

        // When: GetRatingTrendUseCase.execute() is called
        const result = await getRatingTrendUseCase.execute({ driverId });

        // Then: The result should be an error
        expect(result.isErr()).toBe(true);
      });
    });
  });
});