/*******************************************************************************
 * Copyright (c) 2014 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Ian Craggs - initial API and implementation and/or initial documentation
 *    Sergio R. Caprile - clarifications and/or documentation extension
 *
 * Description:
 * Short topic name used to avoid registration process
 *******************************************************************************/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>

#include "MQTTSNPacket.h"
#include "transport.h"

#include "int_test_result.h"


#define TLOG(fmt, ...)  tlog("qos0pub", fmt,  ## __VA_ARGS__)
#define SHORT_TOPIC "ST"


int send_pub(char *host, int port, char * buf, int buflen, int qos, int retained, short packetid, char *payload, int payloadlen)
{
    MQTTSN_topicid topic;
    int rc = 0;
    int len = 0;
    int dup = 0;
    
    /* publish with short name */
    topic.type = MQTTSN_TOPIC_TYPE_SHORT;
    memcpy(topic.data.short_name, SHORT_TOPIC, 2);
    len = MQTTSNSerialize_publish(buf, buflen, dup, qos, retained, packetid,
            topic, payload, payloadlen);
    rc = transport_sendPacketBuffer(host, port, buf, len);

    TLOG("rc %d from send packet %s for publish topictype %d topicid %d length %d\n", rc, payload, topic.type, topic.data.id, len);
    
    return rc;
}



int main(int argc, char** argv)
{
    int rc = 0;
    int mysock;
    unsigned char buf[200];
    int buflen = sizeof(buf);
    
    unsigned char payload[16];
    int payloadlen = 0;
    int len = 0;
    int qos = 3;
    int retained = 0;
    short packetid = 0;
    char ascii = 0;
//  char *topicname = "a long topic name";
    char *host = "127.0.0.1";
    int port = 1884;
    int i = 0;
    MQTTSNPacket_connectData options = MQTTSNPacket_connectData_initializer;

    mysock = transport_open();
    if(mysock < 0)
        return mysock;

    if (argc > 1)
        host = argv[1];

    if (argc > 2)
        port = atoi(argv[2]);

    TLOG("Sending to hostname %s port %d\n", host, port);

    options.clientID.cstring = "pubpredef0 MQTT-SN";
    len = MQTTSNSerialize_connect(buf, buflen, &options);
    rc = transport_sendPacketBuffer(host, port, buf, len);

    /* wait for connack */
    if (MQTTSNPacket_read(buf, buflen, transport_getdata) == MQTTSN_CONNACK)
    {
        int connack_rc = -1;

        if (MQTTSNDeserialize_connack(&connack_rc, buf, buflen) != 1 || connack_rc != 0)
        {
            TLOG("Unable to connect, return code %d\n", connack_rc);
            goto exit;
        }
        else 
            TLOG("connected rc %d\n", connack_rc);
    }
    else
        goto exit;

    for(i=0;i<2;i++)
    {
        ascii = 'a'+(i%26);
        payload[0] = payload[1] = payload[2] = ascii;
        payload[3] = 0;
        payloadlen = 4;
        send_pub(host, port, buf, buflen, qos, retained, packetid, payload, payloadlen);
        TLOG("%d send publish %s", i, payload);
        sleep(1);
    }

exit:
    transport_close();

    return 0;
}