package com.blog.springboot.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.blog.springboot.wx.service.WxService;
import com.blog.springboot.wx.util.SignUtil;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
/**
 * 微信公眾號(hào)API
 * @author youcong
 * @date 2019-6-02
 */
@RestController
@RequestMapping("/wx_public_api")
@Api(tags = { "微信公眾號(hào)api" }, description = "微信公眾號(hào)api")
public class WxPublicApiController extends AbstractController{

	@Autowired
	private WxService wxService;
	
	
       /**
        * 微信公眾平臺(tái)服務(wù)器配置驗(yàn)證
        * @param request
        * @param response
        */
	   @GetMapping
	   @ApiOperation("微信公眾平臺(tái)服務(wù)器配置驗(yàn)證")
	   public void validate(HttpServletRequest request, HttpServletResponse response) {
	        // 微信加密簽名，signature結(jié)合了開(kāi)發(fā)者填寫(xiě)的token參數(shù)和請(qǐng)求中的timestamp參數(shù)、nonce參數(shù)。
	        String signature = request.getParameter("signature");
	        // 時(shí)間戳
	        String timestamp = request.getParameter("timestamp");
	        // 隨機(jī)數(shù)
	        String nonce = request.getParameter("nonce");
	        // 隨機(jī)字符串
	        String echostr = request.getParameter("echostr");

	        PrintWriter out = null;
	        try {
	            out = response.getWriter();
	            // 通過(guò)檢驗(yàn)signature對(duì)請(qǐng)求進(jìn)行校驗(yàn)，若校驗(yàn)成功則原樣返回echostr，否則接入失敗
	            if (SignUtil.checkSignature(signature, timestamp, nonce)) {
	                out.print(echostr);
	            }
	        } catch (IOException e) {
	            e.printStackTrace();
	            logger.error(e.getMessage());
	            
	        } finally {
	            
	        	out.close();
	            out = null;
	        }
	    }

     /**
      * 關(guān)注推送消息
      * @param request
      * @param response
      */
	 @PostMapping
	 @ApiOperation("關(guān)注推送消息")
	 public void about(HttpServletRequest request, HttpServletResponse response) {
	        try {
	            request.setCharacterEncoding("UTF-8");
	        } catch (UnsupportedEncodingException e) {
	            e.printStackTrace();
	            logger.error(e.getMessage(),e);
	        }
	        response.setContentType("text/html;charset=UTF-8");

	        // 調(diào)用核心業(yè)務(wù)類(lèi)接收消息、處理消息
	        String respMessage = wxService.newMessageRequest(request);

	        // 響應(yīng)消息
	        PrintWriter out = null;
	        try {
	            out = response.getWriter();
	            out.print(respMessage);
	        } catch (IOException e) {
	            e.printStackTrace();
	            logger.error(e.getMessage(),e);
	        } finally {
	            out.close();
	            out = null;
	        }
	    }
}