/**
 * Tests for FocusPresetManager
 */

import { describe, it, expect, beforeEach } from 'vitest';
import { FocusPresetManager, MemoryPresetStorage } from './focusPresets.js';

describe('FocusPresetManager', () => {
  let manager: FocusPresetManager;
  let storage: MemoryPresetStorage;

  beforeEach(() => {
    storage = new MemoryPresetStorage();
    manager = new FocusPresetManager(storage);
  });

  describe('savePreset', () => {
    it('should save a new preset', () => {
      const result = manager.savePreset('test-preset', ['worker1'], ['bead1']);
      expect(result).toBe(true);

      const presets = manager.getPresets();
      expect(presets).toHaveLength(1);
      expect(presets[0].name).toBe('test-preset');
      expect(presets[0].pinnedWorkers).toEqual(['worker1']);
      expect(presets[0].pinnedBeads).toEqual(['bead1']);
    });

    it('should not save preset with empty name', () => {
      const result = manager.savePreset('', ['worker1'], []);
      expect(result).toBe(false);
      expect(manager.getPresets()).toHaveLength(0);
    });

    it('should update existing preset with same name', () => {
      manager.savePreset('test-preset', ['worker1'], []);
      manager.savePreset('test-preset', ['worker2'], ['bead2']);

      const presets = manager.getPresets();
      expect(presets).toHaveLength(1);
      expect(presets[0].pinnedWorkers).toEqual(['worker2']);
      expect(presets[0].pinnedBeads).toEqual(['bead2']);
    });

    it('should trim preset name', () => {
      manager.savePreset('  trimmed-name  ', ['worker1'], []);
      expect(manager.hasPreset('trimmed-name')).toBe(true);
    });
  });

  describe('loadPreset', () => {
    it('should load an existing preset', () => {
      manager.savePreset('test-preset', ['worker1', 'worker2'], ['bead1']);

      const config = manager.loadPreset('test-preset');
      expect(config).not.toBeNull();
      expect(config?.pinnedWorkers).toEqual(['worker1', 'worker2']);
      expect(config?.pinnedBeads).toEqual(['bead1']);
    });

    it('should return null for non-existent preset', () => {
      const config = manager.loadPreset('non-existent');
      expect(config).toBeNull();
    });

    it('should return a copy of the arrays', () => {
      manager.savePreset('test-preset', ['worker1'], []);

      const config = manager.loadPreset('test-preset');
      config?.pinnedWorkers.push('worker2');

      const config2 = manager.loadPreset('test-preset');
      expect(config2?.pinnedWorkers).toEqual(['worker1']);
    });
  });

  describe('deletePreset', () => {
    it('should delete an existing preset', () => {
      manager.savePreset('test-preset', ['worker1'], []);
      const result = manager.deletePreset('test-preset');

      expect(result).toBe(true);
      expect(manager.getPresets()).toHaveLength(0);
    });

    it('should return false for non-existent preset', () => {
      const result = manager.deletePreset('non-existent');
      expect(result).toBe(false);
    });
  });

  describe('getPresetNames', () => {
    it('should return all preset names', () => {
      manager.savePreset('preset1', [], []);
      manager.savePreset('preset2', [], []);
      manager.savePreset('preset3', [], []);

      const names = manager.getPresetNames();
      expect(names).toEqual(['preset1', 'preset2', 'preset3']);
    });

    it('should return empty array when no presets', () => {
      expect(manager.getPresetNames()).toEqual([]);
    });
  });

  describe('hasPreset', () => {
    it('should return true for existing preset', () => {
      manager.savePreset('test-preset', [], []);
      expect(manager.hasPreset('test-preset')).toBe(true);
    });

    it('should return false for non-existent preset', () => {
      expect(manager.hasPreset('non-existent')).toBe(false);
    });
  });

  describe('subscribe', () => {
    it('should notify listeners when preset is saved', () => {
      let callCount = 0;
      manager.subscribe(() => callCount++);

      manager.savePreset('test-preset', [], []);
      expect(callCount).toBe(1);
    });

    it('should notify listeners when preset is deleted', () => {
      manager.savePreset('test-preset', [], []);

      let callCount = 0;
      manager.subscribe(() => callCount++);

      manager.deletePreset('test-preset');
      expect(callCount).toBe(1);
    });

    it('should unsubscribe correctly', () => {
      let callCount = 0;
      const unsubscribe = manager.subscribe(() => callCount++);

      unsubscribe();
      manager.savePreset('test-preset', [], []);

      expect(callCount).toBe(0);
    });
  });
});