import { Standing } from './Standing';
import { RacingDomainValidationError } from '../errors/RacingDomainError';

describe('Standing', () => {
  const validProps = {
    id: 'standing-123',
    leagueId: 'league-456',
    driverId: 'driver-789',
    points: 100,
    wins: 5,
    position: 2,
    racesCompleted: 10,
  };

  describe('create', () => {
    it('should create a Standing with valid props', () => {
      const standing = Standing.create(validProps);
      expect(standing.id).toBe('standing-123');
      expect(standing.leagueId.toString()).toBe('league-456');
      expect(standing.driverId.toString()).toBe('driver-789');
      expect(standing.points.toNumber()).toBe(100);
      expect(standing.wins).toBe(5);
      expect(standing.position.toNumber()).toBe(2);
      expect(standing.racesCompleted).toBe(10);
    });

    it('should generate id if not provided', () => {
      const propsWithoutId = {
        leagueId: 'league-456',
        driverId: 'driver-789',
        points: 100,
        wins: 5,
        position: 2,
        racesCompleted: 10,
      };
      const standing = Standing.create(propsWithoutId);
      expect(standing.id).toBe('league-456:driver-789');
    });

    it('should use defaults for optional props', () => {
      const minimalProps = {
        leagueId: 'league-456',
        driverId: 'driver-789',
      };
      const standing = Standing.create(minimalProps);
      expect(standing.points.toNumber()).toBe(0);
      expect(standing.wins).toBe(0);
      expect(standing.position.toNumber()).toBe(1);
      expect(standing.racesCompleted).toBe(0);
    });

    it('should throw for invalid leagueId', () => {
      expect(() => Standing.create({ ...validProps, leagueId: '' })).toThrow(RacingDomainValidationError);
    });

    it('should throw for invalid driverId', () => {
      expect(() => Standing.create({ ...validProps, driverId: '' })).toThrow(RacingDomainValidationError);
    });

    it('should throw for negative points', () => {
      expect(() => Standing.create({ ...validProps, points: -1 })).toThrow(RacingDomainValidationError);
    });

    it('should throw for invalid position', () => {
      expect(() => Standing.create({ ...validProps, position: 0 })).toThrow(RacingDomainValidationError);
    });
  });

  describe('addRaceResult', () => {
    it('should add points and increment races completed', () => {
      const standing = Standing.create(validProps);
      const pointsSystem = { 1: 25, 2: 18, 3: 15 };
      const updated = standing.addRaceResult(1, pointsSystem);
      expect(updated.points.toNumber()).toBe(125); // 100 + 25
      expect(updated.wins).toBe(6); // 5 + 1
      expect(updated.racesCompleted).toBe(11); // 10 + 1
    });

    it('should not add win for non-first position', () => {
      const standing = Standing.create(validProps);
      const pointsSystem = { 1: 25, 2: 18, 3: 15 };
      const updated = standing.addRaceResult(2, pointsSystem);
      expect(updated.points.toNumber()).toBe(118); // 100 + 18
      expect(updated.wins).toBe(5); // no change
      expect(updated.racesCompleted).toBe(11);
    });

    it('should handle position not in points system', () => {
      const standing = Standing.create(validProps);
      const pointsSystem = { 1: 25, 2: 18 };
      const updated = standing.addRaceResult(5, pointsSystem);
      expect(updated.points.toNumber()).toBe(100); // no points
      expect(updated.wins).toBe(5);
      expect(updated.racesCompleted).toBe(11);
    });
  });

  describe('updatePosition', () => {
    it('should update position', () => {
      const standing = Standing.create(validProps);
      const updated = standing.updatePosition(1);
      expect(updated.position.toNumber()).toBe(1);
      expect(updated.points.toNumber()).toBe(100); // unchanged
    });

    it('should throw for invalid position', () => {
      const standing = Standing.create(validProps);
      expect(() => standing.updatePosition(0)).toThrow(RacingDomainValidationError);
    });
  });

  describe('getAveragePoints', () => {
    it('should calculate average points', () => {
      const standing = Standing.create(validProps);
      expect(standing.getAveragePoints()).toBe(10); // 100 / 10
    });

    it('should return 0 for no races completed', () => {
      const standing = Standing.create({ ...validProps, racesCompleted: 0 });
      expect(standing.getAveragePoints()).toBe(0);
    });
  });

  describe('getWinPercentage', () => {
    it('should calculate win percentage', () => {
      const standing = Standing.create(validProps);
      expect(standing.getWinPercentage()).toBe(50); // 5 / 10 * 100
    });

    it('should return 0 for no races completed', () => {
      const standing = Standing.create({ ...validProps, racesCompleted: 0 });
      expect(standing.getWinPercentage()).toBe(0);
    });
  });
});