/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TDENGINE_TUDF_INT_H
#define TDENGINE_TUDF_INT_H

#ifdef __cplusplus
extern "C" {
#endif

//TODO replaces them with fnDebug
//#define debugPrint(...) taosPrintLog("Function", DEBUG_INFO,  135, __VA_ARGS__)
#define debugPrint(...) {fprintf(stderr, __VA_ARGS__);fprintf(stderr, "\n");}
enum {
  UDF_TASK_SETUP = 0,
  UDF_TASK_CALL = 1,
  UDF_TASK_TEARDOWN = 2

};

typedef struct SUdfSetupRequest {
  char udfName[16]; //
  int8_t scriptType; // 0:c, 1: lua, 2:js
  int8_t udfType; //udaf, udf
  int16_t pathSize;
  char *path;
} SUdfSetupRequest;

typedef struct SUdfSetupResponse {
  int64_t udfHandle;
} SUdfSetupResponse;


typedef struct SUdfCallRequest {
  int64_t udfHandle;
  int8_t step;

  int32_t inputBytes;
  char *input;

  int32_t stateBytes;
  char *state;
} SUdfCallRequest;


typedef struct SUdfCallResponse {
  int32_t outputBytes;
  char *output;
  int32_t newStateBytes;
  char *newState;
} SUdfCallResponse;


typedef struct SUdfTeardownRequest {
  int64_t udfHandle;
} SUdfTeardownRequest;


typedef struct SUdfTeardownResponse {
} SUdfTeardownResponse;

typedef struct SUdfRequest {
  int32_t msgLen;
  int64_t seqNum;

  int8_t type;
  void *subReq;
} SUdfRequest;

typedef struct SUdfResponse {
  int32_t msgLen;
  int64_t seqNum;

  int8_t type;
  int32_t code;
  void *subRsp;
} SUdfResponse;

int32_t decodeRequest(char *buf, int32_t bufLen, SUdfRequest **pRequest);
int32_t encodeResponse(char **buf, int32_t *bufLen, SUdfResponse *response);
int32_t encodeRequest(char **buf, int32_t *bufLen, SUdfRequest *request);
int32_t decodeResponse(char *buf, int32_t bufLen, SUdfResponse **pResponse);

#ifdef __cplusplus
}
#endif

#endif  // TDENGINE_TUDF_INT_H