/*
 * FreeRTOS V1.4.7
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://aws.amazon.com/freertos
 * http://www.FreeRTOS.org
 */

#include <string.h>

#include "console_io.h"
#include "entropy_hardware.h"

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"

/* Demo includes */
#include "aws_demo.h"

/* AWS library includes. */
#include "iot_system_init.h"
#include "iot_logging_task.h"
#include "iot_wifi.h"
#include "aws_clientcredential.h"
#include "aws_dev_mode_key_provisioning.h"

/* Logging Task Defines. */
#define mainLOGGING_MESSAGE_QUEUE_LENGTH    ( 15 )
#define mainLOGGING_TASK_STACK_SIZE         ( configMINIMAL_STACK_SIZE * 8 )

/* The task delay for allowing the lower priority logging task to print out Wi-Fi 
 * failure status before blocking indefinitely. */
#define mainLOGGING_WIFI_STATUS_DELAY       pdMS_TO_TICKS( 1000 )

/* The name of the devices for xApplicationDNSQueryHook. */
#define mainDEVICE_NICK_NAME                "XMC4800_IoTKit_Demo"

/**
 * @brief Application task startup hook for applications using Wi-Fi. If you are not 
 * using Wi-Fi, then start network dependent applications in the vApplicationIPNetorkEventHook
 * function. If you are not using Wi-Fi, this hook can be disabled by setting 
 * configUSE_DAEMON_TASK_STARTUP_HOOK to 0.
 */
void vApplicationDaemonTaskStartupHook( void );

/**
 * @brief Initializes the board.
 */
static void prvMiscInitialization( void );

/* Ensure the FreeRTOS heap is not crossing SRAM boundaries */
__attribute__((section("ETH_RAM"))) uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];


/*-----------------------------------------------------------*/

/**
 * @brief Application runtime entry point.
 */
int main( void )
{
    /* Perform any hardware initialization that does not require the RTOS to be
     * running.  */
    prvMiscInitialization();

    /* Create tasks that are not dependent on the Wi-Fi being initialized. */
    xLoggingTaskInitialize( mainLOGGING_TASK_STACK_SIZE,
                            tskIDLE_PRIORITY,
                            mainLOGGING_MESSAGE_QUEUE_LENGTH );

    /* Start the scheduler.  Initialization that requires the OS to be running,
     * including the Wi-Fi initialization, is performed in the RTOS daemon task
     * startup hook. */
    vTaskStartScheduler();

    return 0;
}
/*-----------------------------------------------------------*/

static void prvMiscInitialization( void )
{
	CONSOLE_IO_Init();

	ENTROPY_HARDWARE_Init();
}
/*-----------------------------------------------------------*/

void vApplicationDaemonTaskStartupHook( void )
{
    vDevModeKeyProvisioning();
    
    /* Initialize the AWS Libraries system. */
    if ( SYSTEM_Init() == pdPASS )
    {
        DEMO_RUNNER_RunDemos();
    }

}

/*-----------------------------------------------------------*/

/**
 * @brief User defined Idle task function.
 *
 * @note Do not make any blocking operations in this function.
 */
void vApplicationIdleHook( void )
{
    static TickType_t xLastPrint = 0;
    TickType_t xTimeNow;
    const TickType_t xPrintFrequency = pdMS_TO_TICKS( 5000 );

    xTimeNow = xTaskGetTickCount();

    if( ( xTimeNow - xLastPrint ) > xPrintFrequency )
    {
        configPRINT( "." );
        xLastPrint = xTimeNow;
    }
}
/*-----------------------------------------------------------*/

/**
* @brief User defined application hook to process names returned by the DNS server.
*/
#if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 )
    BaseType_t xApplicationDNSQueryHook( const char * pcName )
    {
        /* FIX ME. If necessary, update to applicable DNS name lookup actions. */

        BaseType_t xReturn;

        /* Determine if a name lookup is for this node.  Two names are given
         * to this node: that returned by pcApplicationHostnameHook() and that set
         * by mainDEVICE_NICK_NAME. */
        if( strcmp( pcName, pcApplicationHostnameHook() ) == 0 )
        {
            xReturn = pdPASS;
        }
        else if( strcmp( pcName, mainDEVICE_NICK_NAME ) == 0 )
        {
            xReturn = pdPASS;
        }
        else
        {
            xReturn = pdFAIL;
        }

        return xReturn;
    }
	
#endif /* if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) */
/*-----------------------------------------------------------*/

/**
 * @brief User defined assertion call. This function is plugged into configASSERT.
 * See FreeRTOSConfig.h to define configASSERT to something different.
 */
void vAssertCalled(const char * pcFile,
	uint32_t ulLine)
{
    /* FIX ME. If necessary, update to applicable assertion routine actions. */

	const uint32_t ulLongSleep = 1000UL;
	volatile uint32_t ulBlockVariable = 0UL;
	volatile char * pcFileName = (volatile char *)pcFile;
	volatile uint32_t ulLineNumber = ulLine;

	(void)pcFileName;
	(void)ulLineNumber;

	printf("vAssertCalled %s, %ld\n", pcFile, (long)ulLine);
	fflush(stdout);

	/* Setting ulBlockVariable to a non-zero value in the debugger will allow
	* this function to be exited. */
	taskDISABLE_INTERRUPTS();
	{
		while (ulBlockVariable == 0UL)
		{
			vTaskDelay( pdMS_TO_TICKS( ulLongSleep ) );
		}
	}
	taskENABLE_INTERRUPTS();
}
/*-----------------------------------------------------------*/

/**
 * @brief User defined application hook need by the FreeRTOS-Plus-TCP library.
 */
#if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) || ( ipconfigDHCP_REGISTER_HOSTNAME == 1 )
    const char * pcApplicationHostnameHook(void)
    {
        /* FIX ME: If necessary, update to applicable registration name. */

        /* This function will be called during the DHCP: the machine will be registered 
         * with an IP address plus this name. */
        return clientcredentialIOT_THING_NAME;
    }

#endif