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

#define ECM2_EVENT_MASK     (ECM_EVENT_LOCAL | ECM_EVENT_CFG          |   \
                            ECM_EVENT_WCNT   | ECM_EVENT_STATE_CHANGE |   \
                            ECM_EVENT_SLV)

/* Reference to process variables */
static uint8_t *pucToggle = NULL;
static uint8_t *pucDi = NULL;
static uint8_t *pucBeToggled = NULL;

static int ecmEventHandler(ECM_EVENT *pEvent)
{
    switch(pEvent->ulEvent)
    {
        case ECM_EVENT_STATE_CHANGE:
            printf("ECM_EVENT_STATE_CHANGE: Master state change to ");
            switch(pEvent->ulArg1)
            {
            case ECM_DEVICE_STATE_UNKNOWN:
                printf("UNKNOWN\n");
                break;
            case ECM_DEVICE_STATE_INIT:
                printf("INIT\n");
                break;
            case ECM_DEVICE_STATE_PREOP:
                printf("PREOP\n");
                break;
            case ECM_DEVICE_STATE_SAFEOP:
                printf("SAFEOP\n");
                break;
            case ECM_DEVICE_STATE_OP:
                printf("OP\n");
                break;
            default:
                printf("???\n");
                break;
            }
            break;
        
        case ECM_EVENT_SLV:
            printf("ECM_EVENT_SLV: Slave address %d state change to ", pEvent->ulArg2 & 0x0000FFFF);
            switch(pEvent->ulArg1)
            {
            case ECM_ESC_AL_STATUS_INIT:
                printf("INIT\n");
                break;
            case ECM_ESC_AL_STATUS_PREOP:
                printf("PREOP\n");
                break;
            case ECM_ESC_AL_STATUS_BOOTSTRAP:
                printf("BOOTSTRAP\n");
                break;
            case ECM_ESC_AL_STATUS_SAFEOP:
                printf("SAFEOP\n");
                break;
            case ECM_ESC_AL_STATUS_OP:
                printf("OP\n");
                break;
            default:
                printf("???\n");
                break;
            }
            break;
    }
    return(0);
}

static int CycleHandler(ECM_HANDLE hnd, int error){
    if (*pucBeToggled == 1){
        *pucToggle = 1;
        printf("0x%X \n", *pucDi);
    } else {
        *pucToggle = 0; 
    }
    return 0;
}


int main(int argc, char *argv[])
{
    int result;
    ECM_LIB_INIT libInitData;
    ECM_CFG_INIT cfgInitData;
    ECM_HANDLE hndDevice =NULL;
    ECM_HANDLE hndMaster =NULL;
    ECM_VAR_DESC VarDesc;
    ECM_PROC_CTRL ProcCtrl;

    ECM_INIT(libInitData);
    libInitData.ulEventMask = ECM2_EVENT_MASK;
    libInitData.pfnEventHandler = ecmEventHandler;
    result = ecmInitLibrary(&libInitData);
    if (result != 0) {
      printf("ecmInitLibrary() returned with %d\n", result);
      return(-1);
    }

    ECM_INIT(cfgInitData);
    cfgInitData.Config.File.pszEniFile = "./ecx-ec-example_sec.xml";
    cfgInitData.ulFlags = ECM_FLAG_CFG_KEEP_PROCVARS | ECM_FLAG_CFG_VIRTUAL_VARS;
    result = ecmReadConfiguration(&cfgInitData, &hndDevice, &hndMaster);
    if (result != ECM_SUCCESS) {
        printf("Reading configuration failed with %s\n", ecmResultToString(result));
        ecmInitLibrary(NULL);
        return(result);
    }

    result = ecmGetDataReference(hndMaster, ECM_INPUT_DATA, 39, 1, (void **)&pucDi);
    if (result != ECM_SUCCESS) {
        printf("Failed to get reference to pucDi\n");
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    }

    result = ecmGetDataReference(hndMaster, ECM_OUTPUT_DATA, 39, 1, (void **)&pucToggle);
    if (result != ECM_SUCCESS) {
        printf("Failed to get reference to pucToggle\n");
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    }
    
    result = ecmGetDataReference(hndMaster, ECM_INPUT_DATA, 40, 1, (void **)&pucBeToggled);
    if (result != ECM_SUCCESS) {
        printf("Failed to get reference to pucDi\n");
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    }

    result = ecmAttachMaster(hndMaster);
    if (result != ECM_SUCCESS) {
        printf("Attaching master failed with %s\n", ecmResultToString(result));
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    }

    ecmSleep(1000);

    ECM_INIT(ProcCtrl);
    ProcCtrl.ulAcyclicPeriod = 1000;
    ProcCtrl.ulAcyclicPrio   = ECM_PRIO_DEFAULT;
    ProcCtrl.ulCyclicPeriod = cfgInitData.cfgDataDevice.ulCycleTime;
    ProcCtrl.ulCyclicPrio   = ECM_PRIO_DEFAULT;
    ProcCtrl.pfnHandler     = CycleHandler;
    result = ecmProcessControl(hndDevice, &ProcCtrl);
    if (result != ECM_SUCCESS) {
        printf("Creating background worker threads failed with %s\n", ecmResultToString(result));
        ecmDetachMaster(hndMaster);
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    } 
    
    result = ecmRequestState(hndMaster, ECM_DEVICE_STATE_OP, 60000);
    if (result != ECM_SUCCESS) {
        printf("Failed with %s to change network state into state %d !\n", ecmResultToString(result), ECM_DEVICE_STATE_OP);
        ecmDetachMaster(hndMaster);
        ecmDeleteMaster(hndMaster);
        ecmDeleteDevice(hndDevice);
        ecmInitLibrary(NULL);
        return(-1);
    }

    ecmSleep(100000);

    printf("Detaching master...\n");
    result = ecmDetachMaster(hndMaster);
    if (result != ECM_SUCCESS) {
        printf("Failed with %s\n", ecmResultToString(result));
    }

    printf("Deleting master...\n");
    result = ecmDeleteMaster(hndMaster);
    if (result != ECM_SUCCESS) {
        printf("Failed with %s\n", ecmResultToString(result));
    }

    printf("Deleting device...\n");
    result = ecmDeleteDevice(hndDevice);
    if (result != ECM_SUCCESS) {
        printf("Failed with %s\n", ecmResultToString(result));
    }

    ecmInitLibrary(NULL);

    return 0;

}