import { ipcMain } from 'electron';
import { exec } from 'child_process';
import { promisify } from 'util';
import { getCachedAdbPath } from '../config.js';

const execAsync = promisify(exec);

/**
 * 发送系统按键事件到设备
 * @param {string} ipPort - 设备 ID/IP:Port
 * @param {string} keyCode - 按键代码（如 "4" 表示返回键，"3" 表示Home键）
 * @returns {Promise<{success: boolean, error?: string}>}
 */
export async function sendSystemKey(ipPort, keyCode) {
  if (!ipPort) {
    return { success: false, error: '缺少设备 ID' };
  }
  if (typeof keyCode !== 'string') {
    return { success: false, error: '按键代码必须是字符串' };
  }

  try {
    const adbPath = getCachedAdbPath();
    const command = `${adbPath} -s ${ipPort} shell input keyevent ${keyCode}`;
    await execAsync(command, {
      timeout: 5000,
      maxBuffer: 1024 * 1024
    });
    return { success: true };
  } catch (error) {
    return { success: false, error: error.message };
  }
}

/**
 * 返回键
 * @param {string} ipPort - 设备 ID/IP:Port
 * @returns {Promise<{success: boolean, error?: string}>}
 */
export async function sendBackKey(ipPort) {
  return sendSystemKey(ipPort, '4');
}

/**
 * Home键
 * @param {string} ipPort - 设备 ID/IP:Port
 * @returns {Promise<{success: boolean, error?: string}>}
 */
export async function sendHomeKey(ipPort) {
  return sendSystemKey(ipPort, '3');
}

/**
 * 最近任务键
 * @param {string} ipPort - 设备 ID/IP:Port
 * @returns {Promise<{success: boolean, error?: string}>}
 */
export async function sendRecentAppsKey(ipPort) {
  return sendSystemKey(ipPort, '187');
}

/**
 * 注册 IPC 处理器
 */
export function registerIpcHandlers() {
  // IPC 处理程序：发送系统按键
  ipcMain.handle('send-system-key', async (event, ipPort, keyCode) => {
    return await sendSystemKey(ipPort, keyCode);
  });

  // IPC 处理程序：返回键
  ipcMain.handle('send-back-key', async (event, ipPort) => {
    return await sendBackKey(ipPort);
  });

  // IPC 处理程序：Home键
  ipcMain.handle('send-home-key', async (event, ipPort) => {
    return await sendHomeKey(ipPort);
  });

  // IPC 处理程序：最近任务键
  ipcMain.handle('send-recent-apps-key', async (event, ipPort) => {
    return await sendRecentAppsKey(ipPort);
  });
}