const path = require('path');

// 动态获取 scripts 目录路径
function getScriptsPath(scriptName) {
  // 开发环境
  const devPath = path.join(__dirname, '../../scripts', scriptName);
  // 生产环境（打包后）
  const prodPath = path.join(process.resourcesPath, 'scripts', scriptName);
  
  try {
    // 先尝试开发环境路径
    require.resolve(devPath);
    return devPath;
  } catch (e) {
    // 如果开发环境路径不存在，使用生产环境路径
    return prodPath;
  }
}

// 延迟加载 JavaRunner
let JavaRunner = null;
function getJavaRunner() {
  if (!JavaRunner) {
    JavaRunner = require(getScriptsPath('java-runner'));
  }
  return JavaRunner;
}

/**
 * Java 控制器 - 提供 JRE 管理和 Java 程序调用接口
 */
class JavaController {

  /**
   * 检查 JRE 是否可用
   */
  async checkAvailability() {
    try {
      const JavaRunnerClass = getJavaRunner();
      const javaRunner = new JavaRunnerClass();
      const available = javaRunner.isJREAvailable();
      return { success: true, data: { available } };
    } catch (error) {
      return { success: false, message: error.message };
    }
  }

  /**
   * 获取 Java 版本
   */
  async getVersion() {
    try {
      const JavaRunnerClass = getJavaRunner();
      const javaRunner = new JavaRunnerClass();
      const version = await javaRunner.getVersion();
      return { success: true, data: { version } };
    } catch (error) {
      return { success: false, message: error.message };
    }
  }

  /**
   * 获取 JRE 路径信息
   */
  async getPathInfo() {
    try {
      const JavaRunnerClass = getJavaRunner();
      const javaRunner = new JavaRunnerClass();
      const pathInfo = javaRunner.getPathInfo();
      return { success: true, data: pathInfo };
    } catch (error) {
      return { success: false, message: error.message };
    }
  }

  /**
   * 运行 JAR 文件（异步，等待完成）
   * @param {Object} params - { jarPath, args }
   */
  async runJar(params) {
    const { jarPath, args = [] } = params;
    
    if (!jarPath) {
      return { success: false, message: 'JAR path is required' };
    }

    try {
      const JavaRunnerClass = getJavaRunner();
      const javaRunner = new JavaRunnerClass();
      const exitCode = await javaRunner.runJarAsync(jarPath, args);
      return { success: true, data: { exitCode } };
    } catch (error) {
      return { success: false, message: error.message };
    }
  }
}

JavaController.toString = () => '[class JavaController]';
module.exports = JavaController;