/**
 * @file AppBridge.cpp
 * @brief Vysokoúrovňová logika formvéru nBusBridge. Toto je entrypoint aplikácie.
 *
 * @date Mar 5, 2025
 * @author Juraj Dudak
 */

// #include <NbusSlave.h>
#include "AppBridge.h"
// #include "dataframe.h"
#include "NbusBridge.h"

// #include "NbusCommunicator.h"

/**
 * @brief UART rozhranie medzi Master-Bridge.
 */
UART_HandleTypeDef *pUartMasterGlobal;
/** @brief príznak pre prijatie dát z pUartMasterGlobal */
volatile uint32_t flagUartMasterDataReady;
/** @brief čítací buffer rozhrania pUartMasterGlobal */
uint8_t pMasterUartRx[UART_FRAME_SIZE];
/** @brief buffer pre odoslanie ovpovede rozhrania pUartMasterGlobal */
uint8_t pMasterUartFrame[UART_FRAME_SIZE];
/** @brief interný index pri príjme bajtov z pUartMasterGlobal*/
volatile uint8_t vMasterUartIndex;
/** @brief veľkosť prijatej požiadavky z rozhrania pUartMasterGlobal */
volatile uint8_t vMasterUartSize;

/** @brief Objekt reprezentujúci funkcionality nBusBridge.  */
NbusBridge bridge;

static void init_app()
{
    HAL_UARTEx_ReceiveToIdle_DMA(pUartMasterGlobal, pMasterUartRx, UART_FRAME_SIZE);
    flagUartMasterDataReady = 0;
    vMasterUartIndex = 0;
    vMasterUartSize = 0;

    // boot long blink
    for (uint32_t i = 0; i < 64; i++)
    {
        HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_3);
        HAL_Delay(25);
    }
}

/**
 * @brief Aplikácia nBusBridge.
 * Zabezpežuje príjem a odoslanie odpovedí medzi Bridge a Master.
 * @param uartNbus rozhranie pre internú zbernicu nBus Slave
 * @param uartMaster rozhranie pre externú zbernicu nBus Master
 */
void app(UART_HandleTypeDef *uartNbus, UART_HandleTypeDef *uartMaster)
{

    pUartMasterGlobal = uartMaster;
    init_app();

    NbusCommunicator nc(uartNbus, uartMaster);
    bridge.setCommunicator(&nc);
    bridge.scan();

    while (1)
    {
        bridge.processRunningState();

        if (flagUartMasterDataReady > 0)
        {
            bridge.processRequest(pMasterUartFrame, flagUartMasterDataReady);
            flagUartMasterDataReady = 0;
        }
    }
}

/**
 * @brief Aplikačný callback vrstvy STM32 HAL.
 */
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
    if (huart == pUartMasterGlobal)
    {
        HAL_UARTEx_ReceiveToIdle_DMA(pUartMasterGlobal, pMasterUartRx, UART_FRAME_SIZE);
        uint8_t copy_offset = 0;

        if (vMasterUartIndex == 0)
        {
            vMasterUartSize = pMasterUartRx[0];
            vMasterUartIndex = 1;
            Size--;
            copy_offset = 1;
        }

        if (Size > 0)
        {
            memcpy(&pMasterUartFrame[vMasterUartIndex - 1], &pMasterUartRx[copy_offset], Size);
            vMasterUartIndex += Size;
        }

        if (vMasterUartIndex > vMasterUartSize)
        {
            flagUartMasterDataReady = vMasterUartSize;
            vMasterUartSize = 0;
            vMasterUartIndex = 0;
            pMasterUartRx[0] = 0;
            if (MODULE_ADDRESS(pMasterUartFrame) == 0)
            {
                bridge.process_broadcast(pMasterUartFrame);
                // TODO tu este mozno deaktivovat spracovanie broadcast paketu
                // flagUartMasterDataReady = 0;
            }
        }
    }
}