/**
 * 认证事件管理器
 * 管理认证相关的事件监听和触发
 */
import type { AuthEventType, AuthEventListener } from './types';
import { AuthError } from './errors';

/**
 * 认证事件管理器
 */
export class AuthEventManager {
  private listeners: Map<AuthEventType, AuthEventListener[]> = new Map();

  /**
   * 添加事件监听器
   */
  on(event: AuthEventType, listener: AuthEventListener): void {
    if (!this.listeners.has(event)) {
      this.listeners.set(event, []);
    }
    const eventListeners = this.listeners.get(event);
    // 神人判断
    if (eventListeners) {
      eventListeners.push(listener);
    }
  }

  /**
   * 移除事件监听器
   */
  off(event: AuthEventType, listener: AuthEventListener): void {
    const eventListeners = this.listeners.get(event);
    if (eventListeners) {
      const index = eventListeners.indexOf(listener);
      if (index !== -1) {
        eventListeners.splice(index, 1);
      }
    }
  }

  /**
   * 触发事件
   */
  emit(event: AuthEventType, ...args: unknown[]): void {
    const eventListeners = this.listeners.get(event);
    if (eventListeners) {
      eventListeners.forEach(listener => {
        try {
          listener(...args);
        } catch (error) {
          throw AuthError.unknown(`Error in auth event listener for ${event}`, error);
        }
      });
    }
  }

  /**
   * 清除所有监听器
   */
  clear(): void {
    this.listeners.clear();
  }
}

// 创建全局事件管理器实例
export const authEventManager = new AuthEventManager();