/*
* Copyright (C) 2012-2019 UCloud. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/

#include <stdio.h>
#include <string.h>
#include <limits.h>

#include "uiot_export.h"
#include "uiot_import.h"
#include "lite-utils.h"

#define MAX_SIZE_OF_TOPIC_CONTENT 100
MQTTInitParams init_params = DEFAULT_MQTT_INIT_PARAMS;
static int running_state = 0;

void dynamic_event_handler(void *pclient, void *handle_context, MQTTEventMsg *msg) {
    LOG_DEBUG("Enter event_handler!type:%d\n",msg->event_type);
}

static void on_message_callback(void *pClient, MQTTMessage *message, void *userData) {
    if (message == NULL) {
        return;
    }

    LOG_DEBUG("Receive Message With topicName:%.*s, payload:%.*s",
          (int) message->topic_len, message->topic, (int) message->payload_len, (char *) message->payload);
}

static int _publish_msg(void *client)
{
    char topicName[128] = {0};
    int num = 18;
    HAL_Snprintf(topicName, 128, "/%s/%s/upload/event", PKG_USING_UCLOUD_IOT_SDK_PRODUCT_SN, PKG_USING_UCLOUD_IOT_SDK_DEVICE_SN);

    PublishParams pub_params = DEFAULT_PUB_PARAMS;
    
    char topic_content[MAX_SIZE_OF_TOPIC_CONTENT + 1] = {0};

    HAL_Snprintf(topic_content, MAX_SIZE_OF_TOPIC_CONTENT, "{\"test\": \"%d\"}", num);

    pub_params.payload = topic_content;
    pub_params.payload_len = strlen(topic_content);

    return IOT_MQTT_Publish(client, topicName, &pub_params);
}

static int _register_subscribe_topics(void *client)
{
    static char topic_name[128] = {0};
    HAL_Snprintf(topic_name, 128, "/%s/%s/upload/event", PKG_USING_UCLOUD_IOT_SDK_PRODUCT_SN, PKG_USING_UCLOUD_IOT_SDK_DEVICE_SN);

    SubscribeParams sub_params = DEFAULT_SUB_PARAMS;
    sub_params.on_message_handler = on_message_callback;
    return IOT_MQTT_Subscribe(client, topic_name, &sub_params);
}

/**
 * 设置MQTT connet初始化参数
 *
 * @param initParams MQTT connet初始化参数
 *
 * @return 0: 参数初始化成功  非0: 失败
 */
static int _setup_connect_init_params(MQTTInitParams* initParams)
{
    initParams->device_sn = (char *)PKG_USING_UCLOUD_IOT_SDK_DEVICE_SN;
    initParams->product_sn = (char *)PKG_USING_UCLOUD_IOT_SDK_PRODUCT_SN;
    initParams->product_secret = (char *)PKG_USING_UCLOUD_IOT_SDK_PRODUCT_SECRET;

    initParams->command_timeout = UIOT_MQTT_COMMAND_TIMEOUT;
    initParams->keep_alive_interval = UIOT_MQTT_KEEP_ALIVE_INTERNAL;

    initParams->auto_connect_enable = 1;
    initParams->event_handler.h_fp = dynamic_event_handler;
    initParams->event_handler.context = NULL;

    return SUCCESS_RET;
}

static void dynamic_test_thread(void) 
{
    int ret = 0;
    char secret[IOT_DEVICE_SECRET_LEN+1];
    ret = _setup_connect_init_params(&init_params);
    if (ret != SUCCESS_RET) {
        return;
    }

    ret = IOT_MQTT_Dynamic_Register(&init_params);
    if (ret != SUCCESS_RET) {
        return;
    }

    ret = HAL_GetDeviceSecret(secret);
    if(ret != SUCCESS_RET)
    {   
        LOG_ERROR("get device secret fail\n");
        return;
    }
    init_params.device_secret = secret;
    LOG_DEBUG("Password:%s\n",init_params.device_secret);
    void *static_client = IOT_MQTT_Construct(&init_params);
    if(static_client == NULL)
    {   
        LOG_ERROR("static_client Construct fail\n");
        return;
    }
    _register_subscribe_topics(static_client);
    IOT_MQTT_Yield(static_client, 200);
    _publish_msg(static_client);
    IOT_MQTT_Yield(static_client, 200);
    ret = IOT_MQTT_Destroy(&static_client);
    return;
}

static int dynamic_test_example(int argc, char **argv)
{
    rt_thread_t tid;
    int stack_size = 8192;

    if (2 == argc)
    {
        if (!strcmp("start", argv[1]))
        {
            if (1 == running_state)
            {
                HAL_Printf("dynamic_test_example is already running\n");
                return 0;
            }            
        }
        else if (!strcmp("stop", argv[1]))
        {
            if (0 == running_state)
            {
                HAL_Printf("dynamic_test_example is already stopped\n");
                return 0;
            }
            running_state = 0;
            return 0;
        }
        else
        {
            HAL_Printf("Usage: dynamic_test_example start/stop");
            return 0;              
        }
    }
    else
    {
        HAL_Printf("Para err, usage: dynamic_test_example start/stop");
        return 0;
    }

    tid = rt_thread_create("dynamic_test", (void (*)(void *))dynamic_test_thread, 
                            NULL, stack_size, RT_THREAD_PRIORITY_MAX / 2 - 1, 100);  

    if (tid != RT_NULL)
    {
        rt_thread_startup(tid);
    }

    return 0;
}


#ifdef RT_USING_FINSH
#include <finsh.h>
FINSH_FUNCTION_EXPORT(dynamic_test_example, startup mqtt dynamic example);
#endif

#ifdef FINSH_USING_MSH
MSH_CMD_EXPORT(dynamic_test_example, startup mqtt dynamic example);
#endif