package com.dsh.guns.modular.system.controller.util;


import javax.net.ssl.*;
import java.io.*;
import java.net.URL;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.*;

//如果JDK版本是1.8,可使用原生Base64类

//如果JDK版本低于1.8,请使用三方库提供Base64类
//import org.apache.commons.codec.binary.Base64;

public class SendSms {

    //无需修改,用于格式化鉴权头域,给"X-WSSE"参数赋值
    private static final String WSSE_HEADER_FORMAT = "UsernameToken Username=\"%s\",PasswordDigest=\"%s\",Nonce=\"%s\",Created=\"%s\"";
    //无需修改,用于格式化鉴权头域,给"Authorization"参数赋值
    private static final String AUTH_HEADER_VALUE = "WSSE realm=\"SDP\",profile=\"UsernameToken\",type=\"Appkey\"";
    //必填,请参考"开发准备"获取如下数据,替换为实际值
    private static String  url = "https://api.rtc.huaweicloud.com:10443/sms/batchSendSms/v1"; //APP接入地址+接口访问URI//https://api.rtc.huaweicloud.com:10443
    private static String appKey = "77lVYXy28011Ia6r43L6180kvdTv"; //APP_Key
    private static String appSecret = "8heBt1YBCL71AF1G9UkxZpoUFqIY"; //APP_Secret
    private static String sender1 = "881907307922"; //国内短信签名通道号或国际/港澳台短信通道号 (验证码类)
    private static String sender2 = "8819073039050"; //国内短信签名通道号或国际/港澳台短信通道号(通知类)
    private static String templateId1 = "6090edbdbd7e4550aae87bea35454d61"; //模板ID(验证码类)
    private static String templateId2 = "18134ace828144f4bec31fa326e4de86"; //模板ID（通知类）
    //条件必填,国内短信关注,当templateId指定的模板类型为通用模板时生效且必填,必须是已审核通过的,与模板类型一致的签名名称
    //国际/港澳台短信不用关注该参数
    private static String signature = "全客通"; //签名名称

    //必填,全局号码格式(包含国家码),示例:+8615123456789,多个号码之间用英文逗号分隔
    String receiver = "+8615123456789,+8615234567890"; //短信接收人号码

    //选填,短信状态报告接收地址,推荐使用域名,为空或者不填表示不接收状态报告
    private static String statusCallBack = "";

    /** 发送短信成功之后的回调信息
     * {"result":[{"originTo":"13981969442","createTime":"2019-08-01T01:13:21Z","from":"8819073039050","smsMsgId":"f69b2293-9285-4f48-933e-6bcba1ea5710_579546688","status":"000000"}],"code":"000000","description":"Success"}
     */

    /**
     * 选填,使用无变量模板时请赋空值 String templateParas = "";
     * 单变量模板示例:模板内容为"您的验证码是${NUM_6}"时,templateParas可填写为"[\"369751\"]"
     * 双变量模板示例:模板内容为"您有${NUM_2}件快递请到${TXT_32}领取"时,templateParas可填写为"[\"3\",\"人民公园正门\"]"
     * 查看更多模板格式规范:常见问题>业务规则>短信模板内容审核标准
     */
    String templateParas = "[\"369751\"]"; //模板变量

    public static String send (String receiver,String templateParas,Integer type) throws Exception {

        //请求Body,不携带签名名称时,signature请填null

        String body="";

        if(type==1){
            //验证码类
            body =buildRequestBody(sender1, receiver, templateId1,templateParas , statusCallBack, signature);
        }else if(type==2){
            //通知类
            body =buildRequestBody(sender2, receiver, templateId2,templateParas , statusCallBack, signature);
        }

        if (null == body || body.isEmpty()) {
            System.out.println("body is null.");
            return null;
        }

        //请求Headers中的X-WSSE参数值
        String wsseHeader = buildWsseHeader(appKey, appSecret);
        if (null == wsseHeader || wsseHeader.isEmpty()) {
            System.out.println("wsse header is null.");
            return null;
        }

        DataOutputStream out = null;
        BufferedReader in = null;
        StringBuffer result = new StringBuffer();
        HttpsURLConnection connection = null;
        InputStream is = null;

        //为防止因HTTPS证书认证失败造成API调用失败,需要先忽略证书信任问题
        HostnameVerifier hv = new HostnameVerifier() {

            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        };
        trustAllHttpsCertificates();

        try {
            URL realUrl = new URL(url);
            connection = (HttpsURLConnection) realUrl.openConnection();

            connection.setHostnameVerifier(hv);
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setUseCaches(true);
            //请求方法
            connection.setRequestMethod("POST");
            //请求Headers参数
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            connection.setRequestProperty("Authorization", AUTH_HEADER_VALUE);
            connection.setRequestProperty("X-WSSE", wsseHeader);

            connection.connect();
            out = new DataOutputStream(connection.getOutputStream());
            out.writeBytes(body); //发送请求Body参数
            out.flush();
            out.close();

            int status = connection.getResponseCode();
            if (200 == status) { //200
                is = connection.getInputStream();
            } else { //400/401
                is = connection.getErrorStream();
            }
            in = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String line = "";
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
            System.out.println(result.toString()); //打印响应消息实体
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != out) {
                    out.close();
                }
                if (null != is) {
                    is.close();
                }
                if (null != in) {
                    in.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result.toString();
    }

    /**
     * 构造请求Body体
     * @param sender
     * @param receiver
     * @param templateId
     * @param templateParas
     * @param statusCallBack
     * @param signature | 签名名称,使用国内短信通用模板时填写
     * @return
     */
    static String buildRequestBody(String sender, String receiver, String templateId, String templateParas,
                                   String statusCallBack, String signature) {
        if (null == sender || null == receiver || null == templateId || sender.isEmpty() || receiver.isEmpty()
                || templateId.isEmpty()) {
            System.out.println("buildRequestBody(): sender, receiver or templateId is null.");
            return null;
        }
        Map<String, String> map = new HashMap<String, String>();

        map.put("from", sender);
        map.put("to", receiver);
        map.put("templateId", templateId);
        if (null != templateParas && !templateParas.isEmpty()) {
            map.put("templateParas", templateParas);
        }
        if (null != statusCallBack && !statusCallBack.isEmpty()) {
            map.put("statusCallback", statusCallBack);
        }
        if (null != signature && !signature.isEmpty()) {
            map.put("signature", signature);
        }

        StringBuilder sb = new StringBuilder();
        String temp = "";

        for (String s : map.keySet()) {
            try {
                temp = URLEncoder.encode(map.get(s), "UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            sb.append(s).append("=").append(temp).append("&");
        }

        return sb.deleteCharAt(sb.length()-1).toString();
    }

    /**
     * 构造X-WSSE参数值
     * @param appKey
     * @param appSecret
     * @return
     */
    static String buildWsseHeader(String appKey, String appSecret) {
        if (null == appKey || null == appSecret || appKey.isEmpty() || appSecret.isEmpty()) {
            System.out.println("buildWsseHeader(): appKey or appSecret is null.");
            return null;
        }
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
        String time = sdf.format(new Date()); //Created
        String nonce = UUID.randomUUID().toString().replace("-", ""); //Nonce

        MessageDigest md;
        byte[] passwordDigest = null;

        try {
            md = MessageDigest.getInstance("SHA-256");
            md.update((nonce + time + appSecret).getBytes());
            passwordDigest = md.digest();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        //如果JDK版本是1.8,请加载原生Base64类,并使用如下代码
        String passwordDigestBase64Str = Base64.getEncoder().encodeToString(passwordDigest); //PasswordDigest
        //如果JDK版本低于1.8,请加载三方库提供Base64类,并使用如下代码
        //String passwordDigestBase64Str = Base64.encodeBase64String(passwordDigest); //PasswordDigest
        //若passwordDigestBase64Str中包含换行符,请执行如下代码进行修正
        //passwordDigestBase64Str = passwordDigestBase64Str.replaceAll("[\\s*\t\n\r]", "");
        return String.format(WSSE_HEADER_FORMAT, appKey, passwordDigestBase64Str, nonce, time);
    }

    /**
     * 忽略证书信任问题
     * @throws Exception
     */
    static void trustAllHttpsCertificates() throws Exception {
        TrustManager[] trustAllCerts = new TrustManager[] {
                new X509TrustManager() {
                    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return;
                    }
                    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return;
                    }
                    public X509Certificate[] getAcceptedIssuers() {
                        return null;
                    }
                }
        };
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }

}