import type { ServiceContainer } from '@stock-bot/di';
import { getLogger } from '@stock-bot/logger';
import type { IHandler, ExecutionContext } from '../types/types';

/**
 * Abstract base class for all handlers
 * Provides common functionality and structure for queue/event operations
 */
export abstract class BaseHandler implements IHandler {
  protected readonly logger;

  constructor(protected readonly container: ServiceContainer) {
    this.logger = getLogger(this.constructor.name);
  }

  /**
   * Main execution method - must be implemented by subclasses
   * Works with queue (events commented for future)
   */
  abstract execute(operation: string, input: unknown, context: ExecutionContext): Promise<unknown>;

  /**
   * Queue helper methods
   */
  protected async scheduleOperation(operation: string, payload: unknown, delay?: number): Promise<void> {
    const queue = await this.container.resolveAsync('queue');
    await queue.add(operation, payload, { delay });
  }

  /**
   * Get a service from the container
   */
  protected async getService<T>(serviceName: string): Promise<T> {
    return await this.container.resolveAsync<T>(serviceName);
  }

  /**
   * Event methods - commented for future
   */
  // protected async publishEvent(eventName: string, payload: unknown): Promise<void> {
  //   const eventBus = await this.container.resolveAsync('eventBus');
  //   await eventBus.publish(eventName, payload);
  // }

  /**
   * Lifecycle hooks - can be overridden by subclasses
   */
  async onInit?(): Promise<void>;
  async onStart?(): Promise<void>;
  async onStop?(): Promise<void>;
  async onDispose?(): Promise<void>;
}

/**
 * Specialized handler for operations that have scheduled jobs
 */
export abstract class ScheduledHandler extends BaseHandler {
  /**
   * Get scheduled job configurations for this handler
   * Override in subclasses to define schedules
   */
  getScheduledJobs?(): Array<{
    operation: string;
    cronPattern: string;
    priority?: number;
    immediately?: boolean;
    description?: string;
  }>;
}