import { describe, it, expect } from 'vitest';
import { SessionState } from '../../../../packages/domain/value-objects/SessionState';

describe('SessionState Value Object', () => {
  describe('create', () => {
    it('should create PENDING state', () => {
      const state = SessionState.create('PENDING');
      expect(state.value).toBe('PENDING');
    });

    it('should create IN_PROGRESS state', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.value).toBe('IN_PROGRESS');
    });

    it('should create PAUSED state', () => {
      const state = SessionState.create('PAUSED');
      expect(state.value).toBe('PAUSED');
    });

    it('should create COMPLETED state', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.value).toBe('COMPLETED');
    });

    it('should create FAILED state', () => {
      const state = SessionState.create('FAILED');
      expect(state.value).toBe('FAILED');
    });

    it('should create STOPPED_AT_STEP_18 state', () => {
      const state = SessionState.create('STOPPED_AT_STEP_18');
      expect(state.value).toBe('STOPPED_AT_STEP_18');
    });

    it('should throw error for invalid state', () => {
      expect(() => SessionState.create('INVALID' as any)).toThrow('Invalid session state');
    });

    it('should throw error for empty string', () => {
      expect(() => SessionState.create('' as any)).toThrow('Invalid session state');
    });
  });

  describe('equals', () => {
    it('should return true for equal states', () => {
      const state1 = SessionState.create('PENDING');
      const state2 = SessionState.create('PENDING');
      expect(state1.equals(state2)).toBe(true);
    });

    it('should return false for different states', () => {
      const state1 = SessionState.create('PENDING');
      const state2 = SessionState.create('IN_PROGRESS');
      expect(state1.equals(state2)).toBe(false);
    });
  });

  describe('isPending', () => {
    it('should return true for PENDING state', () => {
      const state = SessionState.create('PENDING');
      expect(state.isPending()).toBe(true);
    });

    it('should return false for IN_PROGRESS state', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.isPending()).toBe(false);
    });
  });

  describe('isInProgress', () => {
    it('should return true for IN_PROGRESS state', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.isInProgress()).toBe(true);
    });

    it('should return false for PENDING state', () => {
      const state = SessionState.create('PENDING');
      expect(state.isInProgress()).toBe(false);
    });
  });

  describe('isCompleted', () => {
    it('should return true for COMPLETED state', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.isCompleted()).toBe(true);
    });

    it('should return false for IN_PROGRESS state', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.isCompleted()).toBe(false);
    });
  });

  describe('isFailed', () => {
    it('should return true for FAILED state', () => {
      const state = SessionState.create('FAILED');
      expect(state.isFailed()).toBe(true);
    });

    it('should return false for COMPLETED state', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.isFailed()).toBe(false);
    });
  });

  describe('isStoppedAtStep18', () => {
    it('should return true for STOPPED_AT_STEP_18 state', () => {
      const state = SessionState.create('STOPPED_AT_STEP_18');
      expect(state.isStoppedAtStep18()).toBe(true);
    });

    it('should return false for COMPLETED state', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.isStoppedAtStep18()).toBe(false);
    });
  });

  describe('canTransitionTo', () => {
    it('should allow transition from PENDING to IN_PROGRESS', () => {
      const state = SessionState.create('PENDING');
      expect(state.canTransitionTo(SessionState.create('IN_PROGRESS'))).toBe(true);
    });

    it('should allow transition from IN_PROGRESS to PAUSED', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.canTransitionTo(SessionState.create('PAUSED'))).toBe(true);
    });

    it('should allow transition from IN_PROGRESS to STOPPED_AT_STEP_18', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.canTransitionTo(SessionState.create('STOPPED_AT_STEP_18'))).toBe(true);
    });

    it('should allow transition from PAUSED to IN_PROGRESS', () => {
      const state = SessionState.create('PAUSED');
      expect(state.canTransitionTo(SessionState.create('IN_PROGRESS'))).toBe(true);
    });

    it('should not allow transition from COMPLETED to IN_PROGRESS', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.canTransitionTo(SessionState.create('IN_PROGRESS'))).toBe(false);
    });

    it('should not allow transition from FAILED to IN_PROGRESS', () => {
      const state = SessionState.create('FAILED');
      expect(state.canTransitionTo(SessionState.create('IN_PROGRESS'))).toBe(false);
    });

    it('should not allow transition from STOPPED_AT_STEP_18 to IN_PROGRESS', () => {
      const state = SessionState.create('STOPPED_AT_STEP_18');
      expect(state.canTransitionTo(SessionState.create('IN_PROGRESS'))).toBe(false);
    });
  });

  describe('isTerminal', () => {
    it('should return true for COMPLETED state', () => {
      const state = SessionState.create('COMPLETED');
      expect(state.isTerminal()).toBe(true);
    });

    it('should return true for FAILED state', () => {
      const state = SessionState.create('FAILED');
      expect(state.isTerminal()).toBe(true);
    });

    it('should return true for STOPPED_AT_STEP_18 state', () => {
      const state = SessionState.create('STOPPED_AT_STEP_18');
      expect(state.isTerminal()).toBe(true);
    });

    it('should return false for PENDING state', () => {
      const state = SessionState.create('PENDING');
      expect(state.isTerminal()).toBe(false);
    });

    it('should return false for IN_PROGRESS state', () => {
      const state = SessionState.create('IN_PROGRESS');
      expect(state.isTerminal()).toBe(false);
    });

    it('should return false for PAUSED state', () => {
      const state = SessionState.create('PAUSED');
      expect(state.isTerminal()).toBe(false);
    });
  });
});