package com.lwp.controller;
import java.io.IOException;
import java.util.Locale;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.i18n.CookieLocaleResolver;
import org.springframework.web.servlet.support.RequestContext;

@Controller
@RequestMapping("/locale")
public class LocaleController {
	
	@RequestMapping("/login")
	public String login(){
		return "/login";
	}
	
	
	
	@Autowired
    private LocaleResolver localeResolver; 
	
	@RequestMapping("/change")
	@ResponseBody
	public String setSession(HttpServletRequest request,HttpServletResponse response,String locale){
		try {
			//這兩個配置任選其一,可以不加if判斷刪除其一 我這裡是任意配置session或者cookie修改配置後不需變程式碼
			//<bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/>
			if(localeResolver instanceof org.springframework.web.servlet.i18n.SessionLocaleResolver){
				String[] localeArr = locale.split("_");
				
				Locale l = null;
				if(localeArr.length == 1){
					l = new Locale(localeArr[0]);  
				}else{
					l = new Locale(localeArr[0],localeArr[1]);
				}
				localeResolver.setLocale(request, response, l); 
				//request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, l); //功能同上
				System.out.println("SessionLocaleResolver");
			}
			//<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver"/>
			if(localeResolver instanceof org.springframework.web.servlet.i18n.CookieLocaleResolver){
					Cookie cookie = new Cookie(CookieLocaleResolver.LOCALE_REQUEST_ATTRIBUTE_NAME, new Locale(locale).toString());
					cookie.setMaxAge(5);
					response.addCookie(cookie);
					response.flushBuffer();
					System.out.println("CookieLocaleResolver");
				
			}
		} catch (Exception e) {
			e.printStackTrace();
			return "error";
		}
		return "success";
		
	}
	
	/**
	 * 後臺根據國際化編碼返回資訊
	 * @param response
	 * @param request
	 */
	@RequestMapping("returnMessage")
	public void returnMessage(HttpServletResponse response,HttpServletRequest request){
		RequestContext rc = new RequestContext(request);
		String w = rc.getMessage("loginFrom.username"); //根據locale不同返回不同語言
		try {
			response.getWriter().write(w);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}