package com.jysoft;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

import com.jysoft.weChat.util.HttpUtil;
import com.jysoft.weChat.util.Wechatconfig;
import com.jysoft.weChat.vo.AccessTokenVo;

import net.sf.json.JSONObject;

public class AccessTokenServlet extends HttpServlet {

	/**
	 * 每间隔两个小时，获取微信accessToken
	 */
	private static final long serialVersionUID = 119868412918946078L;

	@Override
	public void init() throws ServletException {
		System.out.println("-----启动AccessTokenServlet-----");
		super.init();

		new Thread(new Runnable() {
			@Override
			public void run() {
				while (true) {
					try {
						// 获取accessToken
						Wechatconfig.accessToken = getAccessToken();
						// 获取成功
						if (Wechatconfig.accessToken != null) {
							// 获取成功时，根据access_token获取jsapi_ticket
							getJsapiTicket();
							// 获取到access_token 休眠7000秒,大约2个小时左右
							Thread.sleep(7000 * 1000);
						} else {
							// 获取失败
							Thread.sleep(1000 * 3); // 获取的access_token为空 休眠3秒
						}
					} catch (Exception e) {
						System.out.println("发生异常：" + e.getMessage());
						e.printStackTrace();
						try {
							Thread.sleep(1000 * 10); // 发生异常休眠1秒
						} catch (Exception e1) {
							e.printStackTrace();
						}
					}
				}
			}
		}).start();
	}

	// 获取access_token 接口
	@SuppressWarnings("static-access")
	public static AccessTokenVo getAccessToken() {
		HttpUtil netHelper = new HttpUtil();
		/**
		 * 接口地址为https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET，其中grant_type固定写为client_credential即可。
		 */
		String Url = String.format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", Wechatconfig.appId, Wechatconfig.appSecret);
		// 此请求为https的get请求，返回的数据格式为{"access_token":"ACCESS_TOKEN","expires_in":7200}
		String result = netHelper.getHttpsResponse(Url, "");

		System.out.println("获取到的access_token=" + result);

		JSONObject jsonObject = new JSONObject().fromObject(result);

		AccessTokenVo token = new AccessTokenVo();

		token.setExpireSecond(jsonObject.getInt("expires_in"));
		token.setTokenName(jsonObject.getString("access_token"));

		return token;
	}

	// 获取jsapi_ticket
	@SuppressWarnings("static-access")
	private void getJsapiTicket() {
		HttpUtil netHelper = new HttpUtil();
		String Url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + Wechatconfig.accessToken.getTokenName() + "&type=jsapi";
		// 此请求为https的get请求，返回的数据格式为{"access_token":"ACCESS_TOKEN","expires_in":7200}
		String result = netHelper.getHttpsResponse(Url, "");

		JSONObject jsonObject = new JSONObject().fromObject(result);

		Wechatconfig.ticket = jsonObject.getString("ticket");
	}

}