const { BrowserWindow } = require('electron');
const path = require('path');

/**
 * 启动状态管理器
 * 管理启动流程和显示启动进度
 */
class StartupManager {
  constructor() {
    this.loadingWindow = null;
    this.steps = [
      { id: 'init', label: '正在初始化应用...', progress: 0 },
      { id: 'check-mysql-port', label: '正在检测MySQL端口...', progress: 15 },
      { id: 'start-mysql', label: '正在启动MySQL数据库...', progress: 30 },
      { id: 'wait-mysql', label: '等待MySQL就绪...', progress: 45 },
      { id: 'check-java-port', label: '正在检测后端服务端口...', progress: 60 },
      { id: 'generate-config', label: '正在生成配置文件...', progress: 70 },
      { id: 'start-java', label: '正在启动后端服务...', progress: 80 },
      { id: 'wait-java', label: '等待后端服务就绪...', progress: 90 },
      { id: 'done', label: '启动完成！', progress: 100 }
    ];
    this.currentStep = 0;
  }

  /**
   * 创建 Loading 窗口
   */
  createLoadingWindow() {
    this.loadingWindow = new BrowserWindow({
      width: 500,
      height: 300,
      frame: false,
      transparent: true,
      resizable: false,
      alwaysOnTop: true,
      skipTaskbar: true, // 不在任务栏显示
      webPreferences: {
        nodeIntegration: true,
        contextIsolation: false
      }
    });

    // 加载 loading 页面
    const loadingHtml = path.join(__dirname, '../public/html/loading.html');
    this.loadingWindow.loadFile(loadingHtml);

    return this.loadingWindow;
  }

  /**
   * 更新启动进度
   * @param {string} stepId - 步骤ID
   * @param {object} extraInfo - 额外信息
   */
  updateProgress(stepId, extraInfo = {}) {
    const stepIndex = this.steps.findIndex(s => s.id === stepId);
    
    if (stepIndex !== -1) {
      this.currentStep = stepIndex;
      const step = this.steps[stepIndex];
      
      const progressData = {
        step: stepId,
        label: step.label,
        progress: step.progress,
        ...extraInfo
      };

      // 发送进度到 loading 窗口
      if (this.loadingWindow && !this.loadingWindow.isDestroyed()) {
        this.loadingWindow.webContents.send('startup-progress', progressData);
      }

      console.log(`[StartupManager] ${step.label} (${step.progress}%)`, extraInfo);
    }
  }

  /**
   * 显示错误信息
   * @param {string} error - 错误信息
   */
  showError(error) {
    if (this.loadingWindow && !this.loadingWindow.isDestroyed()) {
      this.loadingWindow.webContents.send('startup-error', { error });
    }
    console.error('[StartupManager] Error:', error);
  }

  /**
   * 关闭 Loading 窗口
   */
  closeLoadingWindow() {
    if (this.loadingWindow && !this.loadingWindow.isDestroyed()) {
      // 使用 destroy() 而不是 close() 确保窗口被完全销毁
      this.loadingWindow.destroy();
      this.loadingWindow = null;
    }
  }

  /**
   * 获取所有步骤
   */
  getSteps() {
    return this.steps;
  }

  /**
   * 获取当前步骤
   */
  getCurrentStep() {
    return this.steps[this.currentStep];
  }
}

module.exports = StartupManager;