import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import
 
 net.sf.json.JSONObject;

import com.baxcall.visitor.wechat.pojo.Token;

public class CommonUtil {
    //private static Logger log = LoggerFactory.getLogger(CommonUtil.class);

    //測試ID
    /*
    public final static String APP_ID = "測試appid";
    public final static String APP_SECRET = "測試secret";
    */
 


    //正式ID

    public final static String APP_ID = "正式appid";
    public final static String APP_SECRET = "正式secret";

    //獲取憑證地址
    public final static String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

    public static Token token;

    //傳送https請求
 

    /**
     * 
     * @param requestUrl    請求的地址
     * @param requestMethod 請求的方式
     * @param outputStr 提交的資料
     * @return
     */
    public static JSONObject httpRequest(String requestUrl,String requestMethod,String outputStr){
        JSONObject jsonObject = null;
        try{
            //建立SSL物件
            TrustManager[] tm = {new MyX509TrustManager()};
            SSLContext sslContext = SSLContext.getInstance("SSL","SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();

            conn.setSSLSocketFactory(ssf);
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod(requestMethod);

            //當提交的資料不為null，向輸入流寫資料
            if(null!=outputStr){
                OutputStream outputStream = conn.getOutputStream();
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            //獲取輸入流
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream,"utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            //讀取響應內容
            StringBuffer buffer = new StringBuffer();
            String str = null;
            while((str=bufferedReader.readLine())!=null){
                buffer.append(str);
            }

            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            conn.disconnect();
            jsonObject = JSONObject.fromObject(buffer.toString());

        }catch(ConnectException e){
            System.err.println("連線超時");
            //log.error("連線超時");
        }catch(Exception e1){
            e1.printStackTrace();
            System.err.println("請求異常");
            //log.error("請求異常");
        }



        return jsonObject;
    }

    /**
     * 獲取Token
     * @param appid
     * @param appsecret
     * @return Token
     */
    public static Token getToken(String appid,String appsecret){
        Token token = null;
        String requestUrl = TOKEN_URL.replace("APPID", appid).replace("APPSECRET", appsecret);
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
        if(null!=jsonObject){
            try{
                token = new Token();
                token.setAccessToken(jsonObject.getString("access_token"));
                token.setExpiresIn(jsonObject.getInt("expires_in"));

            }catch(Exception e){
                e.printStackTrace();
                System.err.println("獲取口令失敗");
                //log.error("獲取口令失敗");
            }
        }
        return token;
    }
}