/* ====================================================================
 * Heinz Bruederlin (12/2022) (heinz@soft-t.de)
 *
 * Based on Copyright (c) 2018 Juerge Liegner  All rights reserved.
 * ====================================================================
 */
#ifndef _SIP_h
#define _SIP_h

#include "Arduino.h"
#include <WiFiUdp.h>

class Sip {
private:
    char*       pbuf;
    size_t      lbuf;
    char        caRead[256];

    const char* pSipIp;
    int         iSipPort;
    const char* pSipUser;
    const char* pSipPassWd;
    const char* pMyIp;
    int         iMyPort;
    const char* pDialNr;
    const char* pDialDesc;

    uint32_t    callid;
    uint32_t    tagid;
    uint32_t    branchid;

    int         iAuthCnt;
    uint32_t    iRingTime;
    uint32_t    iMaxTime;
    uint32_t    iDialRetries;
    int         iLastCSeq;
    void        AddSipLine(const char* constFormat, ...);
    bool        AddCopySipLine(const char* p, const char* psearch);
    bool        ParseParameter(char* dest, int destlen, const char* name, const char* line, char cq = '\"');
    bool        ParseReturnParams(const char* p);
    int         GrepInteger(const char* p, const char* psearch);
    void        Ack(const char* pIn);
    void        Cancel(int seqn);
    void        Bye(int cseq);
    void        Ok(const char* pIn);
    void        Invite(const char* pIn = 0);

    uint32_t    Millis();
    uint32_t    Random();
    int         SendUdp();
    void        MakeMd5Digest(char* pOutHex33, char* pIn);
    
public:
    Sip(char* pBuf, size_t lBuf);
    void        Init(const char* SipIp, int SipPort, const char* MyIp, int MyPort, const char* SipUser, const char* SipPassWd, int MaxDialSec = 10);
    void        HandleUdpPacket(const char* p);
    bool        Dial(const char* DialNr, const char* DialDesc = "");
    int         iSignal;
    bool        IsBusy() { return iRingTime != 0; }
    static      WiFiUDP Udp;
};

#endif