/*
 * This file is part of the kernelstudio package.
 *
 * (c) 2014-2026 zlin <admin@kernelstudio.com>
 *
 * For the full copyright and license information, please view the LICENSE file
 * that was distributed with this source code.
 */

export class EventError {
  code: number;
  status: number;
  message: string | null;
  stack: string | null;

  constructor(code = 500, status = 500, message: string | null = null, stack: string | null = null) {
    this.code = code;
    this.status = status;
    this.message = message;
    this.stack = stack;
  }
}

export class EventListener {

  private _listeners: Record<string, Function[]>;

  constructor(listeners: Record<string, Function[]> = {}) {
    this._listeners = listeners;
  }

  all(): Record<string, Function[]> {
    return { ...this._listeners }; // 返回副本，避免外部直接修改
  }

  has(name: string): boolean {
    return Array.isArray(this._listeners[name]) && this._listeners[name].length > 0;
  }

  on(name: string, fn: Function): void {
    if (!Array.isArray(this._listeners[name])) {
      this._listeners[name] = [];
    }
    this._listeners[name].push(fn);
  }

  off(name: string): void {
    delete this._listeners[name];
  }

  emit(name: string, options?: any): void {
    const listeners = this._listeners[name];
    if (Array.isArray(listeners)) {
      // 复制一份避免在执行中修改数组导致问题
      [...listeners].forEach(f => f(options));
    }
  }

  clear(){
    for (const key in this._listeners) {
      if (this._listeners.hasOwnProperty(key)) {
        delete this._listeners[key];
      }
    }
  }
}

export const safePreventDefault = (event: any) => {
  if (event && typeof event.preventDefault === 'function') {
    event.preventDefault();
  }
};

export const safeStopPropagation = (event: any) => {
  if (event && typeof event.stopPropagation === 'function') {
    event.stopPropagation();
  }
};