/*************************************************************************\
* Copyright (c) 2019 European Spallation Source ERIC
* ecmc is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution. 
*
*  ecmcPluginDAQ.cpp
*
*  Created on: Sept 21, 2020
*      Author: anderssandstrom
*
\*************************************************************************/

// Needed to get headers in ecmc right...
#define ECMC_IS_PLUGIN
#define ECMC_EXAMPLE_PLUGIN_VERSION 2

#ifdef __cplusplus
extern "C" {
#endif  // ifdef __cplusplus

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

#include "ecmcPluginDefs.h"
#include "ecmcDAQDefs.h"
#include "ecmcDAQWrap.h"

static int    lastEcmcError   = 0;
static char*  lastConfStr         = NULL;

static int alreadyLoaded = 0;

/** Optional. 
 *  Will be called once after successful load into ecmc.
 *  Return value other than 0 will be considered error.
 *  configStr can be used for configuration parameters.
 **/
static int daqConstruct(char *configStr)
{
  if(alreadyLoaded) {
    printf("Error: Plugin ecmc_plugin_daq already loaded and can only be loaded once.");
    return -1;  
  }

  // create FFT object and register data callback
  lastConfStr = strdup(configStr);
  return 0; //createDAQ(configStr);  //create from iocsh commands instead
}

/** Optional function.
 *  Will be called once at unload.
 **/
static void daqDestruct(void)
{
  // Segfaults here during destruction?! need to check..
  //deleteAllDAQs();
  //if(lastConfStr){
  //  free(lastConfStr);
  //}
}

/** Optional function.
 *  Will be called each realtime cycle if defined
 *  ecmcError: Error code of ecmc. Makes it possible for 
 *  this plugin to react on ecmc errors
 *  Return value other than 0 will be considered to be an error code in ecmc.
 **/
static int daqRealtime(int ecmcError)
{ 
  lastEcmcError = ecmcError;  
  return executeDAQs();
}


static int daqEnterRT(){
  return validateDAQs(); //linkDataToDAQs();
}

/** Optional function.
 *  Will be called once just before leaving realtime mode
 *  Return value other than 0 will be considered error.
 **/
static int daqExitRT(void){
  return 0;
}

// Register data for plugin so ecmc know what to use
static struct ecmcPluginData pluginDataDef = {
  // Allways use ECMC_PLUG_VERSION_MAGIC
  .ifVersion = ECMC_PLUG_VERSION_MAGIC, 
  // Name 
  .name = "ecmc_plugin_daq",
  // Description
  .desc = "DAQ plugin for use with ecmc.",
  // Option description
  .optionDesc = "\n    "ECMC_PLUGIN_DBG_PRINT_OPTION_CMD"<1/0>    : Enables/disables printouts from plugin, default = disabled.\n", 
  // Plugin version
  .version = ECMC_EXAMPLE_PLUGIN_VERSION,
  // Optional construct func, called once at load. NULL if not definded.
  .constructFnc = daqConstruct,
  // Optional destruct func, called once at unload. NULL if not definded.
  .destructFnc = daqDestruct,
  // Optional func that will be called each rt cycle. NULL if not definded.
  .realtimeFnc = daqRealtime,
  // Optional func that will be called once just before enter realtime mode
  .realtimeEnterFnc = daqEnterRT,
  // Optional func that will be called once just before exit realtime mode
  .realtimeExitFnc = daqExitRT,
  // PLC funcs
  .funcs[0] = {0},
  .consts[0] = {0}, // last element set all to zero..
};

ecmc_plugin_register(pluginDataDef);

# ifdef __cplusplus
}
# endif  // ifdef __cplusplus