/**
 * Electron Preload 脚本
 * 
 * 功能描述：
 * 在渲染进程中安全地暴露主进程 API。
 * 使用 contextBridge 确保安全性。
 * 
 * @author Timeline Team
 * @date 2024
 */

import { contextBridge, ipcRenderer } from 'electron';

/**
 * 暴露给渲染进程的 API
 */
contextBridge.exposeInMainWorld('electronAPI', {
  // 应用信息
  getVersion: () => ipcRenderer.invoke('get-version'),
  getPlatform: () => ipcRenderer.invoke('get-platform'),

  // 更新相关
  checkUpdate: () => ipcRenderer.invoke('check-update'),
  downloadUpdate: () => ipcRenderer.invoke('download-update'),
  installUpdate: () => ipcRenderer.invoke('install-update'),
  
  // 更新事件监听
  onUpdateAvailable: (callback: (info: any) => void) => {
    ipcRenderer.on('update-available', (_, info) => callback(info));
  },
  onUpdateDownloaded: (callback: (info: any) => void) => {
    ipcRenderer.on('update-downloaded', (_, info) => callback(info));
  },

  // 外部链接
  openExternal: (url: string) => ipcRenderer.invoke('open-external', url),

  // 导航事件
  onNavigate: (callback: (path: string) => void) => {
    ipcRenderer.on('navigate', (_, path) => callback(path));
  },

  // 移除监听器
  removeAllListeners: (channel: string) => {
    ipcRenderer.removeAllListeners(channel);
  }
});

// 类型声明
declare global {
  interface Window {
    electronAPI: {
      getVersion: () => Promise<string>;
      getPlatform: () => Promise<string>;
      checkUpdate: () => Promise<any>;
      downloadUpdate: () => Promise<void>;
      installUpdate: () => Promise<void>;
      onUpdateAvailable: (callback: (info: any) => void) => void;
      onUpdateDownloaded: (callback: (info: any) => void) => void;
      openExternal: (url: string) => Promise<void>;
      onNavigate: (callback: (path: string) => void) => void;
      removeAllListeners: (channel: string) => void;
    };
  }
}