package Web;

import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.HashMap;

/**
 *
 * @author Ma
 */
public class Handler {

 public Request request;

 /**
 * 初始化Handler
 */
 public void init(Request request) {
 this.request = request;

 }

 /**
 * 用于实现一些类似构造方法的作用
 * @todo 装饰器实现
 */
 public void construct() {
 ;
 }

 /**
 * 获取参数
 * @param key
 * @return
 */
 public Object getArgument(String key){
 return this.request.Arguments.get(key);
 }
 /**
 * 把模版或者字符串写入
 * @param s
 */
 public void writer(String s) {
 Response.setContent(s);
 }

 /**
 * 读取模版
 */
 public BaseTemplate render(String fileName) {

 try {
 BaseTemplate object;
 if (Options.DEBUG) {
 fileName = fileName.replace(".", "/");//把点替换成路径
 TplCompile tplCompile = new TplCompile();
 object = (BaseTemplate) tplCompile.run(fileName + ".html");
 if (object == null) {
 InternalServerError500.set500(fileName + "模版不存在!");
 }
 } else {
 Class TemplateClass = Class.forName("Template." + fileName + "Template");
 object = (BaseTemplate) TemplateClass.newInstance();
 }
 return object;
 } catch (ClassNotFoundException ex) {
 //模版不存在
 InternalServerError500.set500(fileName + "模版不存在!");
 Logger.getLogger(Handler.class.getName()).log(Level.SEVERE, null, ex);
 } catch (InstantiationException ex) {
 Logger.getLogger(Handler.class.getName()).log(Level.SEVERE, null, ex);
 } catch (IllegalAccessException ex) {
 Logger.getLogger(Handler.class.getName()).log(Level.SEVERE, null, ex);
 }
 return null;
 }

 /**
 * 重定向到URL,发送303
 *
 * @param url
 */
 public void redirect(String url) {
 Response.setStatus(303);
 if (url.toLowerCase().indexOf("http://") < 0) {
 url = "http://" + this.request.Header.get("Host") + url;
 }
 Response.header("Location: " + url);
 }

 /**
 * 页面跳转到URL中,通过HTML
 *
 * @param url
 * @param time
 */
 public void jump(String message, String url, int time, boolean status) {

 boolean isSetUrl = false;

 if (message == null) {
 message = "Message!";
 }
 if (time < 1) {
 time = 3;
 }
 if ("XMLHttpRequest".equals(this.request.Header.get("X-Requested-With"))) {
 //判断Ajax请求
 HashMap map = new HashMap();
 map.put("static", status);
 map.put("data", message);
 Response.setContentType(Response.findContentType("json"));
 this.writer(Json.encode(map));
 } else {
 BaseTemplate jump = this.render("jump");
 jump.assign("status", status);
 jump.assign("message", message);
 if (url != null) {
 isSetUrl = true;
 }
 jump.assign("isSetUrl", isSetUrl);
 jump.assign("url", url);
 jump.assign("wait", time);
 this.writer(jump.display());
 }

 }

 /**
 * 操作成功
 */
 public void success(String message, String url, int time) {
 if (message == null) {
 message = "Success!";
 }
 this.jump(message, url, time, true);
 }

 /**
 * 操作成功
 */
 public void success(String message, String url) {
 this.success(message, url, 0);
 }

 /**
 * 操作成功
 */
 public void success(String message) {
 this.success(message, null, 0);
 }

 /**
 * 操作错误
 */
 public void error(String message, String url, int time) {
 if (message == null) {
 message = "Error!";
 }
 this.jump(message, url, time, false);
 }

 /**
 * 操作错误
 */
 public void error(String message, String url) {
 this.error(message, url, 0);
 }

 /**
 * 操作错误
 */
 public void error(String message) {
 this.error(message, null, 0);
 }
}