/*********************************************************************************
 *      Copyright:  (C) 2019 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  conf.h
 *    Description:  This file is mqttd configure file parser function
 *                 
 *        Version:  1.0.0(2019年06月25日)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "2019年06月25日 22时23分55秒"
 *                 
 ********************************************************************************/
#ifndef  __CONF_H_
#define  __CONF_H_

#define DEF_BORKER_HOSTNAME        "master.iot-yun.com"
#define DEF_BROKER_PORT            10883
#define DEF_BROKER_KEEPALIVE       30
#define DEF_BROKER_USERNAME        "lingyun"
#define DEF_BROKER_PASSWD          "lingyun-emb"

#define DEF_PUBQOS                 0
#define DEF_PUBINTERVAL            3 /* 3 seconds */

#define DEF_SUBQOS                 0

#define MQTT_SYS_TOPIC             "$Sys/Studio/"
#define DEF_SUBTOPIC               MQTT_SYS_TOPIC"Downlink"
#define DEF_PUBTOPIC               MQTT_SYS_TOPIC"Uplink"

enum
{
    Qos0, /* 发送者只发送一次消息，不进行重试，Broker不会返回确认消息。在Qos0情况下，Broker可能没有接受到消息 */
    Qos1, /* 发送者最少发送一次消息，确保消息到达Broker，Broker需要返回确认消息PUBACK。在Qos1情况下，Broker可能接受到重复消息 */
    Qos2, /* Qos2使用两阶段确认来保证消息的不丢失和不重复。在Qos2情况下，Broker肯定会收到消息，且只收到一次  */
};

typedef struct mqtt_ctx_s
{
    /* logger settings */
    char          logfile[128]; /* logger record file */
    int           loglevel;     /* logger level  */
    int           logsize;      /* logger file maxsize, oversize will rollback */

    /* Broker settings  */
    char          host[128];  /* MQTT broker server name  */
    int           port;       /* MQTT broker listen port  */
    char          uid[64];    /* username */
    char          pwd[64];    /* password */
    int           keepalive;  /* MQTT broker send PING message to subsciber/publisher keepalive timeout<seconds> */

    /* Publisher settings */
    char          pubTopic[256]; /* Publisher topic  */
    int           pubQos;        /* Publisher Qos */
    int           interval ;     /* Publish sensor data interval time, unit seconds */

    /* Subscriber settings */
    char          subTopic[256]; /* Subscriber topic */
    int           subQos;        /* Subscriber Qos  */
} mqtt_ctx_t;


extern int mqttd_parser_conf(const char *conf_file, mqtt_ctx_t *ctx, int debug);

#endif   /* ----- #ifndef _CONF_H_  ----- */