import { AvatarId } from './AvatarId';

describe('AvatarId', () => {
  describe('create', () => {
    it('creates from valid string', () => {
      const avatarId = AvatarId.create('avatar-123');

      expect(avatarId.toString()).toBe('avatar-123');
    });

    it('trims whitespace', () => {
      const avatarId = AvatarId.create('  avatar-123  ');

      expect(avatarId.toString()).toBe('avatar-123');
    });

    it('throws error when empty', () => {
      expect(() => AvatarId.create('')).toThrow('Avatar ID cannot be empty');
    });

    it('throws error when only whitespace', () => {
      expect(() => AvatarId.create('   ')).toThrow('Avatar ID cannot be empty');
    });

    it('throws error when null', () => {
      expect(() => AvatarId.create(null as any)).toThrow('Avatar ID cannot be empty');
    });

    it('throws error when undefined', () => {
      expect(() => AvatarId.create(undefined as any)).toThrow('Avatar ID cannot be empty');
    });
  });

  describe('toString', () => {
    it('returns the string value', () => {
      const avatarId = AvatarId.create('avatar-123');

      expect(avatarId.toString()).toBe('avatar-123');
    });
  });

  describe('equals', () => {
    it('returns true for equal avatar IDs', () => {
      const avatarId1 = AvatarId.create('avatar-123');
      const avatarId2 = AvatarId.create('avatar-123');

      expect(avatarId1.equals(avatarId2)).toBe(true);
    });

    it('returns false for different avatar IDs', () => {
      const avatarId1 = AvatarId.create('avatar-123');
      const avatarId2 = AvatarId.create('avatar-456');

      expect(avatarId1.equals(avatarId2)).toBe(false);
    });

    it('returns false for different case', () => {
      const avatarId1 = AvatarId.create('avatar-123');
      const avatarId2 = AvatarId.create('AVATAR-123');

      expect(avatarId1.equals(avatarId2)).toBe(false);
    });
  });

  describe('value object equality', () => {
    it('implements value-based equality', () => {
      const avatarId1 = AvatarId.create('avatar-123');
      const avatarId2 = AvatarId.create('avatar-123');
      const avatarId3 = AvatarId.create('avatar-456');

      expect(avatarId1.equals(avatarId2)).toBe(true);
      expect(avatarId1.equals(avatarId3)).toBe(false);
    });

    it('maintains equality after toString', () => {
      const avatarId1 = AvatarId.create('avatar-123');
      const avatarId2 = AvatarId.create('avatar-123');

      expect(avatarId1.toString()).toBe(avatarId2.toString());
      expect(avatarId1.equals(avatarId2)).toBe(true);
    });
  });
});