package com.genersoft.iot.vmp.gb28181.utils;

import gov.nist.javax.sip.address.AddressImpl;
import gov.nist.javax.sip.address.SipUri;
import gov.nist.javax.sip.header.Subject;

import javax.sip.PeerUnavailableException;
import javax.sip.SipFactory;
import javax.sip.header.FromHeader;
import javax.sip.header.Header;
import javax.sip.header.UserAgentHeader;
import javax.sip.message.Request;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

/**
 * @author panlinlin
 * @version 1.0.0
 * @description JAIN SIP的工具类
 * @createTime 2021年09月27日 15:12:00
 */
public class SipUtils {

    public static String getUserIdFromFromHeader(Request request) {
        FromHeader fromHeader = (FromHeader)request.getHeader(FromHeader.NAME);
        return getUserIdFromFromHeader(fromHeader);
    }
    /**
     * 从subject读取channelId
     * */
    public static String getChannelIdFromRequest(Request request) {
        Header subject = request.getHeader("subject");
        if (subject == null) {
            // 如果缺失subject
            return null;
        }
        return ((Subject) subject).getSubject().split(":")[0];
    }

    public static String getUserIdFromFromHeader(FromHeader fromHeader) {
        AddressImpl address = (AddressImpl)fromHeader.getAddress();
        SipUri uri = (SipUri) address.getURI();
        return uri.getUser();
    }

    public static  String getNewViaTag() {
        return "z9hG4bK" + System.currentTimeMillis();
    }

    public static UserAgentHeader createUserAgentHeader(SipFactory sipFactory) throws PeerUnavailableException, ParseException {
        List<String> agentParam = new ArrayList<>();
        agentParam.add("WVP PRO");
        // TODO 添加版本信息以及日期
        return sipFactory.createHeaderFactory().createUserAgentHeader(agentParam);
    }

    public static String getNewFromTag(){
        return UUID.randomUUID().toString().replace("-", "");

//        return getNewTag();
    }

    public static String getNewTag(){
        return String.valueOf(System.currentTimeMillis());
    }

}