package com.wecloud.im.biz.externalaccess.sms.sender;

import lombok.extern.slf4j.Slf4j;

import java.nio.charset.Charset;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Base64;
import java.util.Date;
import java.util.List;
import java.util.UUID;

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import com.alibaba.fastjson.JSONObject;
import com.wecloud.im.biz.externalaccess.sms.domain.HwSmsRoot;

/**
 * @Author wenzhida
 * @Date 2022/4/21 21:30
 * @Description 华为短信发送器
 */
@Slf4j
@Component
public class HwSmsSender {
    /**
     * 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\"";

    @Value("${sms.huawei.url}")
    private String url;

    @Value("${sms.huawei.sender}")
    private String sender;

    @Value("${sms.huawei.appKey}")
    private String appKey;

    @Value("${sms.huawei.appSecret}")
    private String appSecret;

    public String sendMsg(String mobile, String templateId, String templateParas) throws Exception {
        //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
        //签名名称
        String signature = "蔚可云";
        String receiver = "+86" + mobile;

        //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
        String statusCallBack = "";
        /**
         * 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${1}"时,templateParas可填写为"[\"369751\"]"
         * 双变量模板示例:模板内容为"您有${1}件快递请到${2}领取"时,templateParas可填写为"[\"3\",\"人民公园正门\"]"
         * 模板中的每个变量都必须赋值，且取值不能为空
         * 查看更多模板和变量规范:产品介绍>模板和变量规范
         */
        //模板变量，此处以单变量验证码短信为例，请客户自行生成6位验证码，并定义为字符串类型，以杜绝首位0丢失的问题（例如：002569变成了2569）。
        //templateParas = "[\"369751\"]";

        //请求Body,不携带签名名称时,signature请填null
        String body = buildRequestBody(sender, receiver, templateId, templateParas, statusCallBack, signature);
        if (null == body || body.isEmpty()) {
            log.info("body is null.");
            return "1";
        }

        //请求Headers中的X-WSSE参数值
        String wsseHeader = buildWsseHeader(appKey, appSecret);
        if (null == wsseHeader || wsseHeader.isEmpty()) {
            log.info("wsse header is null.");
            return "1";
        }

        //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
        CloseableHttpClient client = HttpClients.custom()
                .setSSLContext(new SSLContextBuilder().loadTrustMaterial(null,
                        (x509CertChain, authType) -> true).build())
                .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                .build();

        //请求方法POST
        HttpResponse response = client.execute(RequestBuilder.create("POST")
                .setUri(url)
                .addHeader(HttpHeaders.CONTENT_TYPE, "application/x-www-form-urlencoded")
                .addHeader(HttpHeaders.AUTHORIZATION, AUTH_HEADER_VALUE)
                .addHeader("X-WSSE", wsseHeader)
                .setEntity(new StringEntity(body)).build());

        //打印响应头域信息
        log.info("响应头信息 {}", response.toString());
        //打印响应消息实体
        String entity = EntityUtils.toString(response.getEntity());
        log.info("消息实体 {}", entity);
        HwSmsRoot hwSmsRoot = JSONObject.parseObject(entity, HwSmsRoot.class);
        return "0";
    }

    /**
     * 构造请求Body体
     *
     * @param sender
     * @param receiver
     * @param templateId
     * @param templateParas
     * @param statusCallbackUrl
     * @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 statusCallbackUrl, 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;
        }
        List<NameValuePair> keyValues = new ArrayList<NameValuePair>();

        keyValues.add(new BasicNameValuePair("from", sender));
        keyValues.add(new BasicNameValuePair("to", receiver));
        keyValues.add(new BasicNameValuePair("templateId", templateId));
        if (null != templateParas && !templateParas.isEmpty()) {
            keyValues.add(new BasicNameValuePair("templateParas", templateParas));
        }
        if (null != statusCallbackUrl && !statusCallbackUrl.isEmpty()) {
            keyValues.add(new BasicNameValuePair("statusCallback", statusCallbackUrl));
        }
        if (null != signature && !signature.isEmpty()) {
            keyValues.add(new BasicNameValuePair("signature", signature));
        }
        return URLEncodedUtils.format(keyValues, Charset.forName("UTF-8"));
    }

    /**
     * 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'");
        //Created
        String time = sdf.format(new Date());
        //Nonce
        String nonce = UUID.randomUUID().toString().replace("-", "");
        byte[] passwordDigest = DigestUtils.sha256(nonce + time + appSecret);
        String hexDigest = Hex.encodeHexString(passwordDigest);
        String passwordDigestBase64Str = Base64.getEncoder().encodeToString(hexDigest.getBytes());
        return String.format(WSSE_HEADER_FORMAT, appKey, passwordDigestBase64Str, nonce, time);
    }

}
