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package cn.dreampie.common.web.thread;

import cn.dreampie.common.config.ReTurnType;
import com.jfinal.core.Controller;
import com.jfinal.log.Logger;
import com.jfinal.render.JsonRender;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Created by wangrenhui on 13-12-31.
 */
public class ThreadLocalUtil {
  protected static final Logger logger = Logger.getLogger(ThreadLocalUtil.class);
  // request线程对象
  private static ThreadLocal requestLocal = new ThreadLocal();
  // response线程对象
  private static ThreadLocal responseLocal = new ThreadLocal();

  public static void init(HttpServletRequest request, HttpServletResponse response) {
    setRequest(request);
    setResponse(response);
  }

  public static HttpServletRequest getRequest() {
    return (HttpServletRequest) requestLocal.get();
  }

  public static void setRequest(HttpServletRequest request) {
    requestLocal.set(request);
  }

  public static HttpServletResponse getResponse() {
    return (HttpServletResponse) responseLocal.get();
  }

  public static void setResponse(HttpServletResponse response) {
    responseLocal.set(response);
  }

  public static HttpSession getSession() {
    if (requestLocal.get() != null) {
      return (HttpSession) ((HttpServletRequest) requestLocal.get())
          .getSession();
    } else {
      return null;
    }
  }

  public static ServletContext getServletContex() {
    if (requestLocal.get() != null) {
      return (ServletContext) ((HttpServletRequest) requestLocal.get())
          .getServletContext();
    } else {
      return null;
    }
  }

  /**
   * 获取返回值类型
   *
   * @return type
   */
  public static ReTurnType returnType() {
    HttpServletRequest request = getRequest();
    if (request != null) {
      String header = request.getHeader("X-Requested-With");
      if ((("XMLHttpRequest").equalsIgnoreCase(header) ||
          ("json").equalsIgnoreCase(request.getParameter("returnType")))) {// 如果是ajax请求响应头会有，x-requested-with；
//      response.setHeader("sessionstatus", "timeout");
        return ReTurnType.JSON;
      }
    }
    return ReTurnType.PAGE;
  }

  public static boolean isAjax() {
    HttpServletRequest request = getRequest();

    if (request != null && ("XMLHttpRequest").equalsIgnoreCase(request.getHeader("X-Requested-With"))) {
      return true;
    }
    return false;
  }

  public static boolean isJson() {
    if (returnType() == ReTurnType.JSON) {
      return true;
    }
    return false;
  }

  public static boolean isJson(Controller controller) {
    if (controller.getRender() instanceof JsonRender) {
      return true;
    }
    return false;
  }
}