import { IEventBus } from '../types/CalendarTypes';
import { CalendarConfig } from '../core/CalendarConfig';
import { EventManager } from '../managers/EventManager';
import { EventRenderingService } from '../renderers/EventRendererManager';
import { GridManager } from '../managers/GridManager';
import { ScrollManager } from '../managers/ScrollManager';
import { NavigationManager } from '../managers/NavigationManager';
import { ViewManager } from '../managers/ViewManager';
import { CalendarManager } from '../managers/CalendarManager';
import { ColumnDetector } from '../managers/ColumnDetector';

/**
 * Factory for creating and managing calendar managers with proper dependency injection
 */
export class ManagerFactory {
  private static instance: ManagerFactory;
  
  private constructor() {}
  
  public static getInstance(): ManagerFactory {
    if (!ManagerFactory.instance) {
      ManagerFactory.instance = new ManagerFactory();
    }
    return ManagerFactory.instance;
  }

  /**
   * Create all managers with proper dependency injection
   */
  public createManagers(eventBus: IEventBus, config: CalendarConfig): {
    eventManager: EventManager;
    eventRenderer: EventRenderingService;
    gridManager: GridManager;
    scrollManager: ScrollManager;
    navigationManager: NavigationManager;
    viewManager: ViewManager;
    calendarManager: CalendarManager;
  } {
    console.log('🏭 ManagerFactory: Creating managers with proper DI...');
    
    // Create managers in dependency order
    const eventManager = new EventManager(eventBus);
    const eventRenderer = new EventRenderingService(eventBus, eventManager);
    const gridManager = new GridManager();
    const scrollManager = new ScrollManager();
    const navigationManager = new NavigationManager(eventBus, eventRenderer);
    const viewManager = new ViewManager(eventBus);
    const columnDetector = new ColumnDetector();
    
    // CalendarManager depends on all other managers
    const calendarManager = new CalendarManager(
      eventBus, 
      config, 
      eventManager, 
      gridManager, 
      eventRenderer, 
      scrollManager
    );

    console.log('✅ ManagerFactory: All managers created successfully');
    
    return {
      eventManager,
      eventRenderer,
      gridManager,
      scrollManager,
      navigationManager,
      viewManager,
      calendarManager
    };
  }

  /**
   * Initialize all managers in the correct order
   */
  public async initializeManagers(managers: {
    calendarManager: CalendarManager;
    [key: string]: any;
  }): Promise<void> {
    console.log('🚀 ManagerFactory: Initializing managers...');
    
    try {
      await managers.calendarManager.initialize();
      console.log('✅ ManagerFactory: All managers initialized successfully');
    } catch (error) {
      console.error('❌ ManagerFactory: Manager initialization failed:', error);
      throw error;
    }
  }
}