/****************************************************************************
 * This file is part of the project AqHome.
 * AqHome (c) by 2023 Martin Preuss, all rights reserved.
 *
 * The license for this file can be found in the file COPYING which you
 * should have received along with this file.
 ****************************************************************************/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif


#include "./c_getlastdatapoint.h"
#include "./aqhome_data_p.h"
#include "aqhome/ipc/data/ipc_data.h"
#include "aqhome/ipc/data/msg_data_value.h"
#include "aqhome/ipc/data/msg_data_singledata.h"
#include "aqhome/ipc/endpoint_ipc.h"
#include "aqhome/ipc/msg_ipc_result.h"
#include "aqhome/ipc/msg_ipc_tag16.h"

#include <gwenhywfar/debug.h>
#include <gwenhywfar/text.h>



/* ------------------------------------------------------------------------------------------------
 * defines
 * ------------------------------------------------------------------------------------------------
 */



/* ------------------------------------------------------------------------------------------------
 * forward declarations
 * ------------------------------------------------------------------------------------------------
 */



/* ------------------------------------------------------------------------------------------------
 * implementations
 * ------------------------------------------------------------------------------------------------
 */


void AqHomeData_HandleGetLastDataPoint(AQHOME_DATA *aqh, GWEN_MSG_ENDPOINT *ep, const GWEN_MSG *recvdMsg)
{
  GWEN_MSG *outMsg;
  int resultCode=AQH_MSG_IPC_SUCCESS;

  if (AQH_IpcEndpoint_GetPermissions(ep) & AQH_IPCENDPOINT_PERMS_READDATA) {
    GWEN_TAG16_LIST *tagList;
    const AQH_VALUE *value;
    char *valueName=NULL;
  
    tagList=AQH_Tag16IpcMsg_ParseTags(recvdMsg, 0);
    if (tagList) {
      const GWEN_TAG16 *tag;
  
      tag=GWEN_Tag16_List_FindFirstByTagType(tagList, AQH_MSGDATA_VALUE_TAGS_NAME);
      valueName=tag?GWEN_Tag16_GetTagDataAsNewString(tag, NULL):NULL;
    }
  
    value=AQH_Storage_GetValueByNameForSystem(aqh->storage, valueName);
    if (value) {
      uint64_t timestamp=0;
      double data=0.0;
      int rv;
  
      rv=AQH_Storage_GetLastDataPoint(aqh->storage, AQH_Value_GetId(value), &timestamp, &data);
      if (rv<0) {
        switch(rv) {
        case GWEN_ERROR_INVALID:   resultCode=AQH_MSG_IPC_ERROR_INVALID; break;
        case GWEN_ERROR_NO_DATA:   resultCode=AQH_MSG_IPC_ERROR_NODATA; break;
        default:                   resultCode=AQH_MSG_IPC_ERROR_GENERIC; break;
        }
      }
      else {
        outMsg=AQH_SingleDataDataIpcMsg_new(AQH_MSGTYPE_IPC_DATA_GETLASTDATA_RSP,
                                            AQH_Value_GetNameForSystem(value),
                                            AQH_Value_GetValueUnits(value),
                                            AQH_Value_GetValueType(value),
                                            timestamp, data);
        GWEN_MsgEndpoint_AddSendMessage(ep, outMsg);
        free(valueName);
        return;
      }
    }
    else {
      DBG_INFO(NULL, "Value \"%s\" not found", valueName);
      resultCode=AQH_MSG_IPC_ERROR_NOTFOUND;
    }
    free(valueName);
  }
  else {
    DBG_ERROR(AQH_LOGDOMAIN, "No permissions to read data");
    resultCode=AQH_MSG_IPC_ERROR_PERMS;
  }

  outMsg=AQH_ResultIpcMsg_new(AQH_MSGTYPE_IPC_DATA_RESULT, resultCode);
  GWEN_MsgEndpoint_AddSendMessage(ep, outMsg);
}