/****************************************************************************
 * This file is part of the project AqHome.
 * AqHome (c) by 2025 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 "./client_p.h"

#include "aqhome/aqhome.h"
#include "aqhome/msg/ipc/m_ipc.h"
#include "aqhome/msg/ipc/m_ipc_tag16.h"
#include "aqhome/msg/ipc/m_ipc_result.h"
#include "aqhome/msg/ipc/data/m_ipcd.h"
#include "aqhome/msg/ipc/nodes/m_ipcn.h"
#include "aqhome/msg/ipc/m_ipc_connect.h"
#include "aqhome/msg/ipc/data/m_ipcd_devices.h"
#include "aqhome/msg/ipc/data/m_ipcd_values.h"
#include "aqhome/msg/ipc/data/m_ipcd_getvalues.h"
#include "aqhome/msg/ipc/data/m_ipcd_getdevices.h"
#include "aqhome/msg/ipc/data/m_ipcd_getdata.h"
#include "aqhome/msg/ipc/data/m_ipcd_multidata.h"
#include "aqhome/msg/ipc/data/m_ipcd_setdata.h"
#include "aqhome/ipc2/tcp_object.h"
#include "aqhome/ipc2/ipc_client.h"
#include <aqhome/ipc2/ipc_endpoint.h>

#include <gwenhywfar/debug.h>
#include <gwenhywfar/timestamp.h>
#include <gwenhywfar/db.h>
#include <gwenhywfar/i18n.h>
#include <gwenhywfar/text.h>


#define AQH_DATA_CLIENT_DEFAULT_CMD_TIMEOUT 5



static int _connectEndpoint(AQH_DATACLIENT *dc, const char *addr, int port, uint32_t flags);
static int _exchangeConnectMsgs(AQH_DATACLIENT *dc, const char *userId, const char *passwd, const char *clientId, uint32_t flags);
static uint64_t _getFirstOrLastData(AQH_DATACLIENT *dc, const char *valueName, uint64_t *dataPtr, uint64_t maxNum, int mode);
static uint64_t _handleDataResponses(AQH_DATACLIENT *dc, uint64_t *dataPtr, uint64_t maxNum, uint32_t msgId);
static int _handleResult(AQH_DATACLIENT *dc, uint32_t msgId);






AQH_DATACLIENT *AQH_DataClient_new(AQH_EVENT_LOOP *eventLoop, uint8_t protoId, uint8_t protoVer)
{
  AQH_DATACLIENT *dc;

  GWEN_NEW_OBJECT(AQH_DATACLIENT, dc);

  dc->eventLoop=eventLoop;
  dc->protoId=protoId;
  dc->protoVer=protoVer;
  dc->timeoutInSeconds=AQH_DATA_CLIENT_DEFAULT_CMD_TIMEOUT;

  return dc;
}



void AQH_DataClient_free(AQH_DATACLIENT *dc)
{
  if (dc) {
    AQH_Object_free(dc->ipcEndpoint);
    GWEN_FREE_OBJECT(dc);
  }
}



int AQH_DataClient_ReadLocalArgs(AQH_DATACLIENT *dc,
                                 GWEN_DB_NODE *dbGlobalArgs, const GWEN_ARGS *args,
                                 int argc, char **argv)
{
  if (dc) {
    int rv;

    GWEN_DB_Group_free(dc->dbLocalArgs);
    dc->dbLocalArgs=GWEN_DB_GetGroup(dbGlobalArgs, GWEN_DB_FLAGS_DEFAULT, "local");
    rv=GWEN_Args_Check(argc, argv, 1, GWEN_ARGS_MODE_ALLOW_FREEPARAM, args, dc->dbLocalArgs);
    if (rv==GWEN_ARGS_RESULT_ERROR) {
      fprintf(stderr, "ERROR: Could not parse arguments\n");
      return 1;
    }
    else if (rv==GWEN_ARGS_RESULT_HELP) {
      GWEN_BUFFER *ubuf;

      ubuf=GWEN_Buffer_new(0, 1024, 0, 1);
      if (GWEN_Args_Usage(args, ubuf, GWEN_ArgsOutType_Txt)) {
        fprintf(stderr, "ERROR: Could not create help string\n");
          return 1;
      }
      fprintf(stderr, "%s\n", GWEN_Buffer_GetStart(ubuf));
      GWEN_Buffer_free(ubuf);
      return 1;
    }
    dc->timeoutInSeconds=GWEN_DB_GetIntValue(dc->dbLocalArgs, "timeout", 0, 5);

    AQH_MergeConfigFileIntoConfig(dc->dbLocalArgs, "ConfigFile");
    return 0;
  }
  return GWEN_ERROR_INVALID;
}



int AQH_DataClient_ReadConfigFile(AQH_DATACLIENT *dc)
{
  GWEN_DB_NODE *dbConfig;

  dbConfig=AQH_LoadConfigFile();
  if (dbConfig) {
    GWEN_DB_Group_free(dc->dbLocalArgs);
    dc->dbLocalArgs=dbConfig;
    return 0;
  }
  return GWEN_ERROR_GENERIC;
}



GWEN_DB_NODE *AQH_DataClient_GetDbLocalArgs(const AQH_DATACLIENT *dc)
{
  return dc?dc->dbLocalArgs:NULL;
}



int AQH_DataClient_Connect(AQH_DATACLIENT *dc,
                           const char *addr, int port,
                           const char *userId, const char *passwd,
                           const char *clientId,
                           uint32_t flags)
{
  if (dc) {
    int rv;

    AQH_Object_free(dc->ipcEndpoint);
    dc->ipcEndpoint=NULL;

    rv=_connectEndpoint(dc, addr, port, 0 /* connection flags */);
    if (rv<0) {
      DBG_INFO(NULL, "here (%d)", rv);
      return rv;
    }

    rv=_exchangeConnectMsgs(dc, userId, passwd, clientId, flags);
    if (rv<0) {
      AQH_Object_free(dc->ipcEndpoint);
      dc->ipcEndpoint=NULL;
      DBG_INFO(NULL, "here (%d)", rv);
      return rv;
    }
    return 0;
  }
  return GWEN_ERROR_INVALID;
}



int AQH_DataClient_Disconnect(AQH_DATACLIENT *dc)
{
  if (dc) {
    AQH_Object_free(dc->ipcEndpoint);
    dc->ipcEndpoint=NULL;
    return 0;
  }
  return GWEN_ERROR_INVALID;
}



void AQH_DataClient_SetTimeout(AQH_DATACLIENT *dc, int i)
{
  if (dc) {
    dc->timeoutInSeconds=i;
  }
}



AQH_DEVICE_LIST *AQH_DataClient_GetDevices(AQH_DATACLIENT *dc, const char *deviceName)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    AQH_MESSAGE *msgIn;
    uint32_t msgId;
    AQH_DEVICE_LIST *fullDeviceList;

    fullDeviceList=AQH_Device_List_new();
    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageGetDevices_new(AQH_MSGTYPE_IPC_DATA_GETDEVICES_REQ, msgId, 0, deviceName);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    while( (msgIn=AQH_IpcEndpoint_WaitForResponseMsg(dc->ipcEndpoint, msgId, dc->timeoutInSeconds)) ) {
      GWEN_TAG16_LIST *tagList;

      tagList=AQH_IpcMessageTag16_ParsePayload(msgIn, 0);
      if (tagList) {
        uint16_t code;

        code=AQH_IpcMessage_GetCode(msgIn);
        if (code==AQH_MSGTYPE_IPC_DATA_GETDEVICES_RSP) {
          AQH_DEVICE_LIST *deviceList;

          deviceList=AQH_IpcdMessageDevices_ReadDeviceList(tagList);
          if (deviceList) {
            AQH_Device_List_AddList(fullDeviceList, deviceList);
            AQH_Device_List_free(deviceList);
          }
          if (AQH_IpcdMessageDevices_GetFlags(tagList) & AQH_MSGDATA_DEVICES_FLAGS_LASTMSG) {
            GWEN_Tag16_List_free(tagList);
            AQH_Message_free(msgIn);
            break;
          }
        }
        else if (code==AQH_MSGTYPE_IPC_DATA_RESULT) {
          DBG_ERROR(NULL, "Server Error: %d", AQH_IpcMessageResult_GetResult(tagList));
          GWEN_Tag16_List_free(tagList);
          AQH_Message_free(msgIn);
          AQH_Device_List_free(fullDeviceList);
          return NULL;
        }
        else {
          DBG_INFO(NULL, "Ignoring message \"%d\"", code);
        }
        GWEN_Tag16_List_free(tagList);
      }
      AQH_Message_free(msgIn);
    } /* while */

    if (AQH_Device_List_GetCount(fullDeviceList)>0)
      return fullDeviceList;
    AQH_Device_List_free(fullDeviceList);
  }
  return NULL;
}



AQH_VALUE_LIST *AQH_DataClient_GetValues(AQH_DATACLIENT *dc, const char *deviceName, int modality)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    AQH_MESSAGE *msgIn;
    uint32_t msgId;
    AQH_VALUE_LIST *fullValueList;

    fullValueList=AQH_Value_List_new();
    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageGetValues_new(AQH_MSGTYPE_IPC_DATA_GETVALUES_REQ, msgId, 0, deviceName, modality);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    while( (msgIn=AQH_IpcEndpoint_WaitForResponseMsg(dc->ipcEndpoint, msgId, dc->timeoutInSeconds)) ) {
      GWEN_TAG16_LIST *tagList;

      tagList=AQH_IpcMessageTag16_ParsePayload(msgIn, 0);
      if (tagList) {
        uint16_t code;

        code=AQH_IpcMessage_GetCode(msgIn);
        if (code==AQH_MSGTYPE_IPC_DATA_GETVALUES_RSP) {
          AQH_VALUE_LIST *valueList;

          valueList=AQH_IpcdMessageValues_ReadValueList(tagList);
          if (valueList) {
            AQH_Value_List_AddList(fullValueList, valueList);
            AQH_Value_List_free(valueList);
          }
          if (AQH_IpcdMessageValues_GetFlags(tagList) & AQH_MSGDATA_VALUES_FLAGS_LASTMSG) {
            GWEN_Tag16_List_free(tagList);
            AQH_Message_free(msgIn);
            break;
          }
        }
        else if (code==AQH_MSGTYPE_IPC_DATA_RESULT) {
          DBG_ERROR(NULL, "Server Error: %d", AQH_IpcMessageResult_GetResult(tagList));
          GWEN_Tag16_List_free(tagList);
          AQH_Message_free(msgIn);
          AQH_Value_List_free(fullValueList);
          return NULL;
        }
        else {
          DBG_INFO(NULL, "Ignoring message \"%d\"", code);
        }
        GWEN_Tag16_List_free(tagList);
      }
      AQH_Message_free(msgIn);
    } /* while */

    if (AQH_Value_List_GetCount(fullValueList)>0)
      return fullValueList;
    AQH_Value_List_free(fullValueList);
  }
  return NULL;
}



uint64_t AQH_DataClient_GetFirstData(AQH_DATACLIENT *dc, const char *valueName, uint64_t *dataPtr, uint64_t maxNum)
{
  return _getFirstOrLastData(dc, valueName, dataPtr, maxNum, AQH_MSGDATA_GETDATA_MODE_FIRST);
}



uint64_t AQH_DataClient_GetLastData(AQH_DATACLIENT *dc, const char *valueName, uint64_t *dataPtr, uint64_t maxNum)
{
  return _getFirstOrLastData(dc, valueName, dataPtr, maxNum, AQH_MSGDATA_GETDATA_MODE_LAST);
}



uint64_t AQH_DataClient_GetPeriodData(AQH_DATACLIENT *dc, const char *valueName,
                                      uint64_t *dataPtr,  uint64_t maxNum,
                                      uint64_t tsBegin, uint64_t tsEnd)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    uint32_t msgId;

    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageGetData_new(AQH_MSGTYPE_IPC_DATA_GETDATA_REQ,
                                      msgId, 0,
                                      AQH_MSGDATA_GETDATA_MODE_PERIOD,
                                      valueName, tsBegin, tsEnd, maxNum);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    return _handleDataResponses(dc, dataPtr, maxNum, msgId);
  }
  return 0;
}



int AQH_DataClient_SetData(AQH_DATACLIENT *dc, const AQH_VALUE *v, double data)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    uint32_t msgId;

    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageSetData_new(AQH_MSGTYPE_IPC_DATA_SETDATA, msgId, 0, v, data);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    return _handleResult(dc, msgId);
  }

  return GWEN_ERROR_INVALID;
}



int AQH_DataClient_UpdateData(AQH_DATACLIENT *dc, const AQH_VALUE *v, uint64_t timeStamp, double dataPoint)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    uint32_t msgId;

    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageMultiData_newForOne(AQH_MSGTYPE_IPC_DATA_UPDATEDATA, msgId, 0, 0, v, timeStamp, dataPoint);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    return _handleResult(dc, msgId);
  }

  return GWEN_ERROR_INVALID;
}



int AQH_DataClient_ModDevice(AQH_DATACLIENT *dc, const AQH_DEVICE *d)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    uint32_t msgId;

    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageDevices_newForOneDevice(AQH_MSGTYPE_IPC_DATA_MODDEVICE_REQ, msgId, 0, AQH_MSGDATA_DEVICES_FLAGS_LASTMSG, d);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    return _handleResult(dc, msgId);
  }

  return GWEN_ERROR_INVALID;
}






int _connectEndpoint(AQH_DATACLIENT *dc, const char *addr, int port, uint32_t flags)
{
  if (dc) {
    AQH_OBJECT *ep;
    int fd;

    fd=AQH_TcpObject_CreateConnectedSocket(addr, port);
    if (fd<0) {
      DBG_ERROR(NULL, "Error connecting to broker server %s:%d", addr, port);
      return GWEN_ERROR_IO;
    }

    ep=AQH_IpcClientObject_new(dc->eventLoop, fd);
    assert(ep);
    AQH_Endpoint_AddFlags(ep, flags);
    dc->ipcEndpoint=ep;
    return 0;
  }

  return GWEN_ERROR_INVALID;
}



int _exchangeConnectMsgs(AQH_DATACLIENT *dc, const char *userId, const char *passwd, const char *clientId, uint32_t flags)
{
  AQH_MESSAGE *msgOut;
  uint32_t msgId;

  DBG_INFO(NULL, "Sending connect message for proto=%d.%d", dc->protoId, dc->protoVer);
  msgId=AQH_Endpoint_GetNextMessageId(dc->ipcEndpoint);
  msgOut=AQH_IpcMessageConnect_new(dc->protoId, dc->protoVer,
                                   AQH_MSGTYPE_IPC_CONNECT_REQ,
                                   msgId, 0,
                                   clientId, userId, passwd, flags);
  AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);
  return AQH_IpcEndpoint_WaitForResultMsg(dc->ipcEndpoint,
                                          dc->protoId, dc->protoVer, AQH_MSGTYPE_IPC_RESULT,
                                          msgId, dc->timeoutInSeconds);
}



uint64_t _getFirstOrLastData(AQH_DATACLIENT *dc, const char *valueName, uint64_t *dataPtr, uint64_t maxNum, int mode)
{
  if (dc) {
    AQH_MESSAGE *msgOut;
    uint32_t msgId;

    msgId=++(dc->lastMsgId);
    msgOut=AQH_IpcdMessageGetData_new(AQH_MSGTYPE_IPC_DATA_GETDATA_REQ,
                                      msgId, 0,
                                      mode,
                                      valueName, 0, 0, maxNum);
    AQH_Endpoint_AddMsgOut(dc->ipcEndpoint, msgOut);

    return _handleDataResponses(dc, dataPtr, maxNum, msgId);
  }
  return 0;
}



uint64_t _handleDataResponses(AQH_DATACLIENT *dc, uint64_t *dataPtr, uint64_t maxNum, uint32_t msgId)
{
  AQH_MESSAGE *msgIn;
  uint64_t fullNumberOfPoints=0;

  while( (msgIn=AQH_IpcEndpoint_WaitForResponseMsg(dc->ipcEndpoint, msgId, dc->timeoutInSeconds)) ) {
    GWEN_TAG16_LIST *tagList;

    tagList=AQH_IpcMessageTag16_ParsePayload(msgIn, 0);
    if (tagList) {
      uint16_t code;

      code=AQH_IpcMessage_GetCode(msgIn);
      if (code==AQH_MSGTYPE_IPC_DATA_GETDATA_RSP) {
        const uint64_t *recvDataPtr;
        uint64_t recvNumberOfPoints;
        uint32_t flags;

        flags=AQH_IpcdMessageMultiData_GetFlags(tagList);
        AQH_IpcdMessageMultiData_ReadDatapoints(tagList, &recvDataPtr, &recvNumberOfPoints);
        if (recvNumberOfPoints) {
          uint64_t i;

          for (i=0; i<recvNumberOfPoints; i++) {
            if (fullNumberOfPoints<maxNum) {
              dataPtr[fullNumberOfPoints*2]=recvDataPtr[i*2];
              dataPtr[(fullNumberOfPoints*2)+1]=recvDataPtr[(i*2)+1];
              fullNumberOfPoints++;
            }
            else {
              DBG_ERROR(NULL, "Too many bytes received");
              break;
            }
          }
        }
        if (flags & AQH_MSGDATA_MULTIDATA_FLAGS_LASTMSG) {
          GWEN_Tag16_List_free(tagList);
          AQH_Message_free(msgIn);
          break;
        }
      }
      else if (code==AQH_MSGTYPE_IPC_DATA_RESULT) {
        DBG_INFO(NULL, "Server Error: %d", AQH_IpcMessageResult_GetResult(tagList));
        GWEN_Tag16_List_free(tagList);
        AQH_Message_free(msgIn);
        return 0;
      }
      else {
        DBG_INFO(NULL, "Ignoring message \"%d\"", code);
      }
      GWEN_Tag16_List_free(tagList);
    }
    AQH_Message_free(msgIn);
  } /* while */
  return fullNumberOfPoints;
}



int _handleResult(AQH_DATACLIENT *dc, uint32_t msgId)
{
  AQH_MESSAGE *msgIn;

  while( (msgIn=AQH_IpcEndpoint_WaitForResponseMsg(dc->ipcEndpoint, msgId, dc->timeoutInSeconds)) ) {
    GWEN_TAG16_LIST *tagList;

    tagList=AQH_IpcMessageTag16_ParsePayload(msgIn, 0);
    if (tagList) {
      uint16_t code;

      code=AQH_IpcMessage_GetCode(msgIn);
      if (code==AQH_MSGTYPE_IPC_DATA_RESULT) {
        int result;

        result=AQH_IpcMessageResult_GetResult(tagList);
        DBG_INFO(NULL, "Server result: %d", result);
        GWEN_Tag16_List_free(tagList);
        AQH_Message_free(msgIn);
        if (result!=AQH_MSGDATA_RESULT_SUCCESS) {
          DBG_INFO(NULL, "here (%d)", result);
          return GWEN_ERROR_GENERIC;
        }
        return 0;
      }
      else {
        DBG_INFO(NULL, "Ignoring message \"%d\"", code);
      }
      GWEN_Tag16_List_free(tagList);
    }
    AQH_Message_free(msgIn);
  } /* while */

  return GWEN_ERROR_TIMEOUT;
}




int AQH_DataClient_ConnectWithArgs(AQH_DATACLIENT *dc, uint32_t flags)
{
  const char *brokerAddress;
  int brokerPort;
  const char *userId;
  const char *passwd;
  const char *clientId;
  int rv;

  brokerAddress=GWEN_DB_GetCharValue(dc->dbLocalArgs, "brokerAddress", 0, NULL);
  if (!(brokerAddress && *brokerAddress))
    brokerAddress=GWEN_DB_GetCharValue(dc->dbLocalArgs, "ConfigFile/brokerAddress", 0, "127.0.0.1");

  brokerPort=GWEN_DB_GetIntValue(dc->dbLocalArgs, "brokerPort", 0, -1);
  if (brokerPort<0)
    brokerPort=GWEN_DB_GetIntValue(dc->dbLocalArgs, "ConfigFile/brokerPort", 0, 1899);

  userId=GWEN_DB_GetCharValue(dc->dbLocalArgs, "userId", 0, NULL);
  passwd=GWEN_DB_GetCharValue(dc->dbLocalArgs, "password", 0, NULL);
  clientId=GWEN_DB_GetCharValue(dc->dbLocalArgs, "brokerClientId", 0, NULL);

  rv=AQH_DataClient_Connect(dc, brokerAddress, brokerPort, userId, passwd, clientId, flags);
  if (rv<0) {
    DBG_INFO(NULL, "here (%d)", rv);
    return rv;
  }

  return 0;
}