/*
 * 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/>.
 */

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "clientSml.h"

#define OTD_JSON_SUB_FIELDS_NUM 2

#define JUMP_JSON_SPACE(start) \
while(*(start)){\
  if(unlikely(*(start) > 32))\
    break;\
  else\
    (start)++;\
  }

//SArray *smlJsonParseTags(char *start, char *end){
//  SArray *tags = taosArrayInit(4, sizeof(SSmlKv));
//  while(start < end){
//    SSmlKv kv = {0};
//    kv.type = TSDB_DATA_TYPE_NCHAR;
//    bool isInQuote = false;
//    while(start < end){
//      if(unlikely(!isInQuote && *start == '"')){
//        start++;
//        kv.key = start;
//        isInQuote = true;
//        continue;
//      }
//      if(unlikely(isInQuote && *start == '"')){
//        kv.keyLen = start - kv.key;
//        start++;
//        break;
//      }
//      start++;
//    }
//    bool hasColon = false;
//    while(start < end){
//      if(unlikely(!hasColon && *start == ':')){
//        start++;
//        hasColon = true;
//        continue;
//      }
//      if(unlikely(hasColon && kv.value == NULL && (*start > 32 && *start != '"'))){
//        kv.value = start;
//        start++;
//        continue;
//      }
//
//      if(unlikely(hasColon && kv.value != NULL && (*start == '"' || *start == ',' || *start == '}'))){
//        kv.length = start - kv.value;
//        taosArrayPush(tags, &kv);
//        start++;
//        break;
//      }
//      start++;
//    }
//  }
//  return tags;
//}

//static int32_t smlParseTagsFromJSON(SSmlHandle *info, SSmlLineInfo *elements) {
//  int32_t ret = TSDB_CODE_SUCCESS;
//
//  if(is_same_child_table_telnet(elements, &info->preLine) == 0){
//    return TSDB_CODE_SUCCESS;
//  }
//
//  bool isSameMeasure = IS_SAME_SUPER_TABLE;
//
//  int     cnt = 0;
//  SArray *preLineKV = info->preLineTagKV;
//  bool    isSuperKVInit = true;
//  SArray *superKV = NULL;
//  if(info->dataFormat){
//    if(unlikely(!isSameMeasure)){
//      SSmlSTableMeta *sMeta = (SSmlSTableMeta *)nodeListGet(info->superTables, elements->measure, elements->measureLen, NULL);
//
//      if(unlikely(sMeta == NULL)){
//        sMeta = smlBuildSTableMeta(info->dataFormat);
//        STableMeta * pTableMeta = smlGetMeta(info, elements->measure, elements->measureLen);
//        sMeta->tableMeta = pTableMeta;
//        if(pTableMeta == NULL){
//          info->dataFormat = false;
//          info->reRun      = true;
//          return TSDB_CODE_SUCCESS;
//        }
//        nodeListSet(&info->superTables, elements->measure, elements->measureLen, sMeta, NULL);
//      }
//      info->currSTableMeta = sMeta->tableMeta;
//      superKV = sMeta->tags;
//
//      if(unlikely(taosArrayGetSize(superKV) == 0)){
//        isSuperKVInit = false;
//      }
//      taosArraySetSize(preLineKV, 0);
//    }
//  }else{
//    taosArraySetSize(preLineKV, 0);
//  }
//
//  SArray *tags = smlJsonParseTags(elements->tags, elements->tags + elements->tagsLen);
//  int32_t tagNum = taosArrayGetSize(tags);
//  if (tagNum == 0) {
//    uError("SML:tag is empty:%s", elements->tags)
//    taosArrayDestroy(tags);
//    return TSDB_CODE_SML_INVALID_DATA;
//  }
//  for (int32_t i = 0; i < tagNum; ++i) {
//    SSmlKv kv = *(SSmlKv*)taosArrayGet(tags, i);
//
//    if(info->dataFormat){
//      if(unlikely(cnt + 1 > info->currSTableMeta->tableInfo.numOfTags)){
//        info->dataFormat = false;
//        info->reRun      = true;
//        taosArrayDestroy(tags);
//        return TSDB_CODE_SUCCESS;
//      }
//
//      if(isSameMeasure){
//        if(unlikely(cnt >= taosArrayGetSize(preLineKV))) {
//          info->dataFormat = false;
//          info->reRun      = true;
//          taosArrayDestroy(tags);
//          return TSDB_CODE_SUCCESS;
//        }
//        SSmlKv *preKV = (SSmlKv *)taosArrayGet(preLineKV, cnt);
//        if(unlikely(kv.length > preKV->length)){
//          preKV->length = kv.length;
//          SSmlSTableMeta *tableMeta = (SSmlSTableMeta *)nodeListGet(info->superTables, elements->measure, elements->measureLen, NULL);
//          ASSERT(tableMeta != NULL);
//
//          SSmlKv *oldKV = (SSmlKv *)taosArrayGet(tableMeta->tags, cnt);
//          oldKV->length = kv.length;
//          info->needModifySchema = true;
//        }
//        if(unlikely(!IS_SAME_KEY)){
//          info->dataFormat = false;
//          info->reRun      = true;
//          taosArrayDestroy(tags);
//          return TSDB_CODE_SUCCESS;
//        }
//      }else{
//        if(isSuperKVInit){
//          if(unlikely(cnt >= taosArrayGetSize(superKV))) {
//            info->dataFormat = false;
//            info->reRun      = true;
//            taosArrayDestroy(tags);
//            return TSDB_CODE_SUCCESS;
//          }
//          SSmlKv *preKV = (SSmlKv *)taosArrayGet(superKV, cnt);
//          if(unlikely(kv.length > preKV->length)) {
//            preKV->length = kv.length;
//          }else{
//            kv.length = preKV->length;
//          }
//          info->needModifySchema = true;
//
//          if(unlikely(!IS_SAME_KEY)){
//            info->dataFormat = false;
//            info->reRun      = true;
//            taosArrayDestroy(tags);
//            return TSDB_CODE_SUCCESS;
//          }
//        }else{
//          taosArrayPush(superKV, &kv);
//        }
//        taosArrayPush(preLineKV, &kv);
//      }
//    }else{
//      taosArrayPush(preLineKV, &kv);
//    }
//    cnt++;
//  }
//  taosArrayDestroy(tags);
//
//  SSmlTableInfo *tinfo = (SSmlTableInfo *)nodeListGet(info->childTables, elements, POINTER_BYTES, is_same_child_table_telnet);
//  if (unlikely(tinfo == NULL)) {
//    tinfo = smlBuildTableInfo(1, elements->measure, elements->measureLen);
//    if (unlikely(!tinfo)) {
//      return TSDB_CODE_OUT_OF_MEMORY;
//    }
//    tinfo->tags = taosArrayDup(preLineKV, NULL);
//
//    smlSetCTableName(tinfo);
//    if (info->dataFormat) {
//      info->currSTableMeta->uid = tinfo->uid;
//      tinfo->tableDataCtx = smlInitTableDataCtx(info->pQuery, info->currSTableMeta);
//      if (tinfo->tableDataCtx == NULL) {
//        smlBuildInvalidDataMsg(&info->msgBuf, "smlInitTableDataCtx error", NULL);
//        return TSDB_CODE_SML_INVALID_DATA;
//      }
//    }
//
//    SSmlLineInfo *key = (SSmlLineInfo *)taosMemoryMalloc(sizeof(SSmlLineInfo));
//    *key = *elements;
//    tinfo->key = key;
//    nodeListSet(&info->childTables, key, POINTER_BYTES, tinfo, is_same_child_table_telnet);
//  }
//  if (info->dataFormat) info->currTableDataCtx = tinfo->tableDataCtx;
//
//  return ret;
//}

static char* smlJsonGetObj(char *payload){
  int   leftBracketCnt = 0;
  while(*payload) {
    if (unlikely(*payload == '{')) {
      leftBracketCnt++;
      payload++;
      continue;
    }
    if (unlikely(*payload == '}')) {
      leftBracketCnt--;
      payload++;
      if (leftBracketCnt == 0) {
        return payload;
      } else if (leftBracketCnt < 0) {
        return NULL;
      }
      continue;
    }
    payload++;
  }
  return NULL;
}

int smlJsonParseObjFirst(char **start, SSmlLineInfo *element, int8_t *offset){
  int index = 0;
  while(*(*start)){
    if((*start)[0] != '"'){
      (*start)++;
      continue;
    }

    if(unlikely(index >= OTD_JSON_FIELDS_NUM)) {
      uError("index >= %d, %s", OTD_JSON_FIELDS_NUM, *start)
      break;
    }

    char *sTmp = *start;
    if((*start)[1] == 'm' && (*start)[2] == 'e' && (*start)[3] == 't'
       && (*start)[4] == 'r' &&  (*start)[5] == 'i' && (*start)[6] == 'c' && (*start)[7] == '"'){

      (*start) += 8;
      bool isInQuote = false;
      while(*(*start)){
        if(unlikely(!isInQuote && *(*start) == '"')){
          (*start)++;
          offset[index++] = *start - sTmp;
          element->measure = (*start);
          isInQuote = true;
          continue;
        }
        if(unlikely(isInQuote && *(*start) == '"')){
          element->measureLen = (*start) - element->measure;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 't' && (*start)[2] == 'i' && (*start)[3] == 'm'
             && (*start)[4] == 'e' &&  (*start)[5] == 's' && (*start)[6] == 't'
             && (*start)[7] == 'a' &&  (*start)[8] == 'm' && (*start)[9] == 'p' && (*start)[10] == '"'){

      (*start) += 11;
      bool hasColon = false;
      while(*(*start)){
        if(unlikely(!hasColon && *(*start) == ':')){
          (*start)++;
          JUMP_JSON_SPACE((*start))
          offset[index++] = *start - sTmp;
          element->timestamp = (*start);
          hasColon = true;
          continue;
        }
        if(unlikely(hasColon && (*(*start) == ',' || *(*start) == '}' || (*(*start)) <= 32))){
          element->timestampLen = (*start) - element->timestamp;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 'v' && (*start)[2] == 'a' && (*start)[3] == 'l'
             && (*start)[4] == 'u' &&  (*start)[5] == 'e' && (*start)[6] == '"'){

      (*start) += 7;

      bool hasColon = false;
      while(*(*start)){
        if(unlikely(!hasColon && *(*start) == ':')){
          (*start)++;
          JUMP_JSON_SPACE((*start))
          offset[index++] = *start - sTmp;
          element->cols = (*start);
          hasColon = true;
          continue;
        }
        if(unlikely(hasColon && (*(*start) == ',' || *(*start) == '}' || (*(*start)) <= 32))){
          element->colsLen = (*start) - element->cols;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 't' && (*start)[2] == 'a' && (*start)[3] == 'g'
             && (*start)[4] == 's' && (*start)[5] == '"'){
      (*start) += 6;

      while(*(*start)){
        if(unlikely(*(*start) == ':')){
          (*start)++;
          JUMP_JSON_SPACE((*start))
          offset[index++] = *start - sTmp;
          element->tags = (*start);
          char* tmp = smlJsonGetObj((*start));
          if(tmp){
            element->tagsLen = tmp - (*start);
            *start = tmp;
          }
          break;
        }
        (*start)++;
      }
    }
    if(*(*start) == '}'){
      (*start)++;
      break;
    }
    (*start)++;
  }

  if(unlikely(index != OTD_JSON_FIELDS_NUM) || element->tags == NULL || element->cols == NULL || element->measure == NULL || element->timestamp == NULL) {
    uError("elements != %d or element parse null", OTD_JSON_FIELDS_NUM)
    return -1;
  }
  return 0;
}

int smlJsonParseObj(char **start, SSmlLineInfo *element, int8_t *offset){
  int index = 0;
  while(*(*start)){
    if((*start)[0] != '"'){
      (*start)++;
      continue;
    }

    if(unlikely(index >= OTD_JSON_FIELDS_NUM)) {
      uError("index >= %d, %s", OTD_JSON_FIELDS_NUM, *start)
      break;
    }

    if((*start)[1] == 'm'){
      (*start) += offset[index++];
      element->measure = *start;
      while(*(*start)){
        if(unlikely(*(*start) == '"')){
          element->measureLen = (*start) - element->measure;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 't' && (*start)[2] == 'i'){
      (*start) += offset[index++];
      element->timestamp = *start;
      while(*(*start)){
        if(unlikely(*(*start) == ',' || *(*start) == '}' || (*(*start)) <= 32)){
          element->timestampLen = (*start) - element->timestamp;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 'v'){
      (*start) += offset[index++];
      element->cols = *start;
      while(*(*start)){
        if(unlikely( *(*start) == ',' || *(*start) == '}' || (*(*start)) <= 32)){
          element->colsLen = (*start) - element->cols;
          break;
        }
        (*start)++;
      }
    }else if((*start)[1] == 't' && (*start)[2] == 'a'){
      (*start) += offset[index++];
      element->tags = (*start);
      char* tmp = smlJsonGetObj((*start));
      if(tmp){
        element->tagsLen = tmp - (*start);
        *start = tmp;
      }
      break;
    }
    if(*(*start) == '}'){
      (*start)++;
      break;
    }
    (*start)++;
  }

  if(unlikely(index != OTD_JSON_FIELDS_NUM)) {
    uError("elements != %d", OTD_JSON_FIELDS_NUM)
    return -1;
  }
  return 0;
}

static inline int32_t smlParseMetricFromJSON(SSmlHandle *info, cJSON *metric, SSmlLineInfo *elements) {
  elements->measureLen = strlen(metric->valuestring);
  if (IS_INVALID_TABLE_LEN(elements->measureLen)) {
    uError("OTD:0x%" PRIx64 " Metric lenght is 0 or large than 192", info->id);
    return TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
  }

  elements->measure = metric->valuestring;
  return TSDB_CODE_SUCCESS;
}

const char *jsonName[OTD_JSON_FIELDS_NUM] = {"metric", "timestamp", "value", "tags"};
static int32_t smlGetJsonElements(cJSON *root, cJSON ***marks){
  cJSON *child = root->child;

  for (int i = 0; i < OTD_JSON_FIELDS_NUM; ++i) {
    while(child != NULL)
    {
      if(strcasecmp(child->string, jsonName[i]) == 0){
        *marks[i] = child;
        break;
      }
      child = child->next;
    }
    if(*marks[i] == NULL){
      uError("smlGetJsonElements error, not find mark:%s", jsonName[i]);
      return -1;
    }
  }
  return TSDB_CODE_SUCCESS;
}

static int32_t smlConvertJSONBool(SSmlKv *pVal, char *typeStr, cJSON *value) {
  if (strcasecmp(typeStr, "bool") != 0) {
    uError("OTD:invalid type(%s) for JSON Bool", typeStr);
    return TSDB_CODE_TSC_INVALID_JSON_TYPE;
  }
  pVal->type = TSDB_DATA_TYPE_BOOL;
  pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
  pVal->i = value->valueint;

  return TSDB_CODE_SUCCESS;
}

static int32_t smlConvertJSONNumber(SSmlKv *pVal, char *typeStr, cJSON *value) {
  // tinyint
  if (strcasecmp(typeStr, "i8") == 0 || strcasecmp(typeStr, "tinyint") == 0) {
    if (!IS_VALID_TINYINT(value->valuedouble)) {
      uError("OTD:JSON value(%f) cannot fit in type(tinyint)", value->valuedouble);
      return TSDB_CODE_TSC_VALUE_OUT_OF_RANGE;
    }
    pVal->type = TSDB_DATA_TYPE_TINYINT;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    pVal->i = value->valuedouble;
    return TSDB_CODE_SUCCESS;
  }
  // smallint
  if (strcasecmp(typeStr, "i16") == 0 || strcasecmp(typeStr, "smallint") == 0) {
    if (!IS_VALID_SMALLINT(value->valuedouble)) {
      uError("OTD:JSON value(%f) cannot fit in type(smallint)", value->valuedouble);
      return TSDB_CODE_TSC_VALUE_OUT_OF_RANGE;
    }
    pVal->type = TSDB_DATA_TYPE_SMALLINT;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    pVal->i = value->valuedouble;
    return TSDB_CODE_SUCCESS;
  }
  // int
  if (strcasecmp(typeStr, "i32") == 0 || strcasecmp(typeStr, "int") == 0) {
    if (!IS_VALID_INT(value->valuedouble)) {
      uError("OTD:JSON value(%f) cannot fit in type(int)", value->valuedouble);
      return TSDB_CODE_TSC_VALUE_OUT_OF_RANGE;
    }
    pVal->type = TSDB_DATA_TYPE_INT;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    pVal->i = value->valuedouble;
    return TSDB_CODE_SUCCESS;
  }
  // bigint
  if (strcasecmp(typeStr, "i64") == 0 || strcasecmp(typeStr, "bigint") == 0) {
    pVal->type = TSDB_DATA_TYPE_BIGINT;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    if (value->valuedouble >= (double)INT64_MAX) {
      pVal->i = INT64_MAX;
    } else if (value->valuedouble <= (double)INT64_MIN) {
      pVal->i = INT64_MIN;
    } else {
      pVal->i = value->valuedouble;
    }
    return TSDB_CODE_SUCCESS;
  }
  // float
  if (strcasecmp(typeStr, "f32") == 0 || strcasecmp(typeStr, "float") == 0) {
    if (!IS_VALID_FLOAT(value->valuedouble)) {
      uError("OTD:JSON value(%f) cannot fit in type(float)", value->valuedouble);
      return TSDB_CODE_TSC_VALUE_OUT_OF_RANGE;
    }
    pVal->type = TSDB_DATA_TYPE_FLOAT;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    pVal->f = value->valuedouble;
    return TSDB_CODE_SUCCESS;
  }
  // double
  if (strcasecmp(typeStr, "f64") == 0 || strcasecmp(typeStr, "double") == 0) {
    pVal->type = TSDB_DATA_TYPE_DOUBLE;
    pVal->length = (int16_t)tDataTypes[pVal->type].bytes;
    pVal->d = value->valuedouble;
    return TSDB_CODE_SUCCESS;
  }

  // if reach here means type is unsupported
  uError("OTD:invalid type(%s) for JSON Number", typeStr);
  return TSDB_CODE_TSC_INVALID_JSON_TYPE;
}

static int32_t smlConvertJSONString(SSmlKv *pVal, char *typeStr, cJSON *value) {
  if (strcasecmp(typeStr, "binary") == 0) {
    pVal->type = TSDB_DATA_TYPE_BINARY;
  } else if (strcasecmp(typeStr, "nchar") == 0) {
    pVal->type = TSDB_DATA_TYPE_NCHAR;
  } else {
    uError("OTD:invalid type(%s) for JSON String", typeStr);
    return TSDB_CODE_TSC_INVALID_JSON_TYPE;
  }
  pVal->length = (int16_t)strlen(value->valuestring);

  if (pVal->type == TSDB_DATA_TYPE_BINARY && pVal->length > TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE) {
    return TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN;
  }
  if (pVal->type == TSDB_DATA_TYPE_NCHAR &&
      pVal->length > (TSDB_MAX_NCHAR_LEN - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE) {
    return TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN;
  }

  pVal->value = value->valuestring;
  return TSDB_CODE_SUCCESS;
}

static int32_t smlParseValueFromJSONObj(cJSON *root, SSmlKv *kv) {
  int32_t ret = TSDB_CODE_SUCCESS;
  int32_t size = cJSON_GetArraySize(root);

  if (size != OTD_JSON_SUB_FIELDS_NUM) {
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  cJSON *value = cJSON_GetObjectItem(root, "value");
  if (value == NULL) {
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  cJSON *type = cJSON_GetObjectItem(root, "type");
  if (!cJSON_IsString(type)) {
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  switch (value->type) {
    case cJSON_True:
    case cJSON_False: {
      ret = smlConvertJSONBool(kv, type->valuestring, value);
      if (ret != TSDB_CODE_SUCCESS) {
        return ret;
      }
      break;
    }
    case cJSON_Number: {
      ret = smlConvertJSONNumber(kv, type->valuestring, value);
      if (ret != TSDB_CODE_SUCCESS) {
        return ret;
      }
      break;
    }
    case cJSON_String: {
      ret = smlConvertJSONString(kv, type->valuestring, value);
      if (ret != TSDB_CODE_SUCCESS) {
        return ret;
      }
      break;
    }
    default:
      return TSDB_CODE_TSC_INVALID_JSON_TYPE;
  }

  return TSDB_CODE_SUCCESS;
}

static int32_t smlParseValueFromJSON(cJSON *root, SSmlKv *kv) {
  switch (root->type) {
    case cJSON_True:
    case cJSON_False: {
      kv->type = TSDB_DATA_TYPE_BOOL;
      kv->length = (int16_t)tDataTypes[kv->type].bytes;
      kv->i = root->valueint;
      break;
    }
    case cJSON_Number: {
      kv->type = TSDB_DATA_TYPE_DOUBLE;
      kv->length = (int16_t)tDataTypes[kv->type].bytes;
      kv->d = root->valuedouble;
      break;
    }
    case cJSON_String: {
      /* set default JSON type to binary/nchar according to
       * user configured parameter tsDefaultJSONStrType
       */

      char *tsDefaultJSONStrType = "nchar";  // todo
      smlConvertJSONString(kv, tsDefaultJSONStrType, root);
      break;
    }
    case cJSON_Object: {
      int32_t ret = smlParseValueFromJSONObj(root, kv);
      if (ret != TSDB_CODE_SUCCESS) {
        uError("OTD:Failed to parse value from JSON Obj");
        return ret;
      }
      break;
    }
    default:
      return TSDB_CODE_TSC_INVALID_JSON;
  }

  return TSDB_CODE_SUCCESS;
}

static int32_t smlParseTagsFromJSON(SSmlHandle *info, cJSON *tags, SSmlLineInfo *elements) {
  int32_t ret = TSDB_CODE_SUCCESS;

  bool isSameMeasure = IS_SAME_SUPER_TABLE;

  int     cnt = 0;
  SArray *preLineKV = info->preLineTagKV;
  bool    isSuperKVInit = true;
  SArray *superKV = NULL;
  if(info->dataFormat){
    if(unlikely(!isSameMeasure)){
      SSmlSTableMeta *sMeta = (SSmlSTableMeta *)nodeListGet(info->superTables, elements->measure, elements->measureLen, NULL);

      if(unlikely(sMeta == NULL)){
        sMeta = smlBuildSTableMeta(info->dataFormat);
        STableMeta * pTableMeta = smlGetMeta(info, elements->measure, elements->measureLen);
        sMeta->tableMeta = pTableMeta;
        if(pTableMeta == NULL){
          info->dataFormat = false;
          info->reRun      = true;
          return TSDB_CODE_SUCCESS;
        }
        nodeListSet(&info->superTables, elements->measure, elements->measureLen, sMeta, NULL);
      }
      info->currSTableMeta = sMeta->tableMeta;
      superKV = sMeta->tags;

      if(unlikely(taosArrayGetSize(superKV) == 0)){
        isSuperKVInit = false;
      }
      taosArraySetSize(preLineKV, 0);
    }
  }else{
    taosArraySetSize(preLineKV, 0);
  }

  int32_t tagNum = cJSON_GetArraySize(tags);
  if(unlikely(tagNum == 0)){
    uError("SML:Tag should not be empty");
    return TSDB_CODE_TSC_INVALID_JSON;
  }
  for (int32_t i = 0; i < tagNum; ++i) {
    cJSON *tag = cJSON_GetArrayItem(tags, i);
    if (unlikely(tag == NULL)) {
      return TSDB_CODE_TSC_INVALID_JSON;
    }
//    if(unlikely(tag == cMeasure)) continue;
    size_t keyLen = strlen(tag->string);
    if (unlikely(IS_INVALID_COL_LEN(keyLen))) {
      uError("OTD:Tag key length is 0 or too large than 64");
      return TSDB_CODE_TSC_INVALID_COLUMN_LENGTH;
    }

    // add kv to SSmlKv
    SSmlKv kv ={.key = tag->string, .keyLen = keyLen};
    // value
    ret = smlParseValueFromJSON(tag, &kv);
    if (unlikely(ret != TSDB_CODE_SUCCESS)) {
      return ret;
    }

    if(info->dataFormat){
      if(unlikely(cnt + 1 > info->currSTableMeta->tableInfo.numOfTags)){
        info->dataFormat = false;
        info->reRun      = true;
        return TSDB_CODE_SUCCESS;
      }

      if(isSameMeasure){
        if(unlikely(cnt >= taosArrayGetSize(preLineKV))) {
          info->dataFormat = false;
          info->reRun      = true;
          return TSDB_CODE_SUCCESS;
        }
        SSmlKv *preKV = (SSmlKv *)taosArrayGet(preLineKV, cnt);
        if(unlikely(kv.length > preKV->length)){
          preKV->length = kv.length;
          SSmlSTableMeta *tableMeta = (SSmlSTableMeta *)nodeListGet(info->superTables, elements->measure, elements->measureLen, NULL);
          ASSERT(tableMeta != NULL);

          SSmlKv *oldKV = (SSmlKv *)taosArrayGet(tableMeta->tags, cnt);
          oldKV->length = kv.length;
          info->needModifySchema = true;
        }
        if(unlikely(!IS_SAME_KEY)){
          info->dataFormat = false;
          info->reRun      = true;
          return TSDB_CODE_SUCCESS;
        }
      }else{
        if(isSuperKVInit){
          if(unlikely(cnt >= taosArrayGetSize(superKV))) {
            info->dataFormat = false;
            info->reRun      = true;
            return TSDB_CODE_SUCCESS;
          }
          SSmlKv *preKV = (SSmlKv *)taosArrayGet(superKV, cnt);
          if(unlikely(kv.length > preKV->length)) {
            preKV->length = kv.length;
          }else{
            kv.length = preKV->length;
          }
          info->needModifySchema = true;

          if(unlikely(!IS_SAME_KEY)){
            info->dataFormat = false;
            info->reRun      = true;
            return TSDB_CODE_SUCCESS;
          }
        }else{
          taosArrayPush(superKV, &kv);
        }
        taosArrayPush(preLineKV, &kv);
      }
    }else{
      taosArrayPush(preLineKV, &kv);
    }
    cnt++;
  }

  SSmlTableInfo *tinfo = (SSmlTableInfo *)nodeListGet(info->childTables, elements, POINTER_BYTES, is_same_child_table_telnet);
  if (unlikely(tinfo == NULL)) {
    tinfo = smlBuildTableInfo(1, elements->measure, elements->measureLen);
    if (unlikely(!tinfo)) {
      return TSDB_CODE_OUT_OF_MEMORY;
    }
    tinfo->tags = taosArrayDup(preLineKV, NULL);

    smlSetCTableName(tinfo);
    if (info->dataFormat) {
      info->currSTableMeta->uid = tinfo->uid;
      tinfo->tableDataCtx = smlInitTableDataCtx(info->pQuery, info->currSTableMeta);
      if (tinfo->tableDataCtx == NULL) {
        smlBuildInvalidDataMsg(&info->msgBuf, "smlInitTableDataCtx error", NULL);
        return TSDB_CODE_SML_INVALID_DATA;
      }
    }

    SSmlLineInfo *key = (SSmlLineInfo *)taosMemoryMalloc(sizeof(SSmlLineInfo));
    *key = *elements;
    if(info->parseJsonByLib){
      key->tags = taosMemoryMalloc(elements->tagsLen + 1);
      memcpy(key->tags, elements->tags, elements->tagsLen);
      key->tags[elements->tagsLen] = 0;
    }
    tinfo->key = key;
    nodeListSet(&info->childTables, key, POINTER_BYTES, tinfo, is_same_child_table_telnet);
  }
  if (info->dataFormat) info->currTableDataCtx = tinfo->tableDataCtx;

  return ret;
}

static int64_t smlParseTSFromJSONObj(SSmlHandle *info, cJSON *root, int32_t toPrecision) {
  int32_t size = cJSON_GetArraySize(root);
  if (unlikely(size != OTD_JSON_SUB_FIELDS_NUM)) {
    smlBuildInvalidDataMsg(&info->msgBuf, "invalidate json", NULL);
    return -1;
  }

  cJSON *value = cJSON_GetObjectItem(root, "value");
  if (unlikely(!cJSON_IsNumber(value))) {
    smlBuildInvalidDataMsg(&info->msgBuf, "invalidate json", NULL);
    return -1;
  }

  cJSON *type = cJSON_GetObjectItem(root, "type");
  if (unlikely(!cJSON_IsString(type))) {
    smlBuildInvalidDataMsg(&info->msgBuf, "invalidate json", NULL);
    return -1;
  }

  double timeDouble = value->valuedouble;
  if (unlikely(smlDoubleToInt64OverFlow(timeDouble))) {
    smlBuildInvalidDataMsg(&info->msgBuf, "timestamp is too large", NULL);
    return -1;
  }

  if (timeDouble == 0) {
    return taosGetTimestampNs()/smlFactorNS[toPrecision];
  }

  if (timeDouble < 0) {
    return timeDouble;
  }

  int64_t tsInt64 = timeDouble;
  size_t typeLen = strlen(type->valuestring);
  if (typeLen == 1 && (type->valuestring[0] == 's' || type->valuestring[0] == 'S')) {
    // seconds
    int8_t fromPrecision = TSDB_TIME_PRECISION_SECONDS;
    if(smlFactorS[toPrecision] < INT64_MAX / tsInt64){
      return tsInt64 * smlFactorS[toPrecision];
    }
    return -1;
  } else if (typeLen == 2 && (type->valuestring[1] == 's' || type->valuestring[1] == 'S')) {
    switch (type->valuestring[0]) {
      case 'm':
      case 'M':
        // milliseconds
        return convertTimePrecision(tsInt64, TSDB_TIME_PRECISION_MILLI, toPrecision);
        break;
      case 'u':
      case 'U':
        // microseconds
        return convertTimePrecision(tsInt64, TSDB_TIME_PRECISION_MICRO, toPrecision);
        break;
      case 'n':
      case 'N':
        return convertTimePrecision(tsInt64, TSDB_TIME_PRECISION_NANO, toPrecision);
        break;
      default:
        return -1;
    }
  } else {
    return -1;
  }
}

uint8_t smlGetTimestampLen(int64_t num) {
  uint8_t len = 0;
  while ((num /= 10) != 0) {
    len++;
  }
  len++;
  return len;
}

static int64_t smlParseTSFromJSON(SSmlHandle *info, cJSON *timestamp) {
  // Timestamp must be the first KV to parse
  int32_t toPrecision = info->currSTableMeta ? info->currSTableMeta->tableInfo.precision : TSDB_TIME_PRECISION_NANO;
  if (cJSON_IsNumber(timestamp)) {
    // timestamp value 0 indicates current system time
    double timeDouble = timestamp->valuedouble;
    if (unlikely(smlDoubleToInt64OverFlow(timeDouble))) {
      smlBuildInvalidDataMsg(&info->msgBuf, "timestamp is too large", NULL);
      return -1;
    }

    if (unlikely(timeDouble < 0)) {
      smlBuildInvalidDataMsg(&info->msgBuf,
                             "timestamp is negative", NULL);
      return timeDouble;
    }else if (unlikely(timeDouble == 0)) {
      return taosGetTimestampNs()/smlFactorNS[toPrecision];
    }

    uint8_t tsLen = smlGetTimestampLen((int64_t)timeDouble);

    int8_t fromPrecision = smlGetTsTypeByLen(tsLen);
    if (unlikely(fromPrecision == -1)) {
      smlBuildInvalidDataMsg(&info->msgBuf,
                             "timestamp precision can only be seconds(10 digits) or milli seconds(13 digits)", NULL);
      return -1;
    }
    int64_t tsInt64 = timeDouble;
    if(fromPrecision == TSDB_TIME_PRECISION_SECONDS){
      if(smlFactorS[toPrecision] < INT64_MAX / tsInt64){
        return tsInt64 * smlFactorS[toPrecision];
      }
      return -1;
    }else{
      return convertTimePrecision(timeDouble, fromPrecision, toPrecision);
    }
  } else if (cJSON_IsObject(timestamp)) {
    return smlParseTSFromJSONObj(info, timestamp, toPrecision);
  } else {
    smlBuildInvalidDataMsg(&info->msgBuf,
                           "invalidate json", NULL);
    return -1;
  }
}

static int32_t smlParseJSONStringExt(SSmlHandle *info, cJSON *root, SSmlLineInfo *elements) {
  int32_t ret = TSDB_CODE_SUCCESS;

  cJSON *metricJson = NULL;
  cJSON *tsJson = NULL;
  cJSON *valueJson = NULL;
  cJSON *tagsJson = NULL;

  int32_t size = cJSON_GetArraySize(root);
  // outmost json fields has to be exactly 4
  if (size != OTD_JSON_FIELDS_NUM) {
    uError("OTD:0x%" PRIx64 " Invalid number of JSON fields in data point %d", info->id, size);
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  cJSON **marks[OTD_JSON_FIELDS_NUM] = {&metricJson, &tsJson, &valueJson, &tagsJson};
  ret = smlGetJsonElements(root, marks);
  if (unlikely(ret != TSDB_CODE_SUCCESS)) {
    return ret;
  }

  // Parse metric
  ret = smlParseMetricFromJSON(info, metricJson, elements);
  if (unlikely(ret != TSDB_CODE_SUCCESS)) {
    uError("OTD:0x%" PRIx64 " Unable to parse metric from JSON payload", info->id);
    return ret;
  }

  // Parse metric value
  SSmlKv kv = {.key = VALUE, .keyLen = VALUE_LEN};
  ret = smlParseValueFromJSON(valueJson, &kv);
  if (unlikely(ret)) {
    uError("OTD:0x%" PRIx64 " Unable to parse metric value from JSON payload", info->id);
    return ret;
  }

  // Parse tags
  elements->tags = cJSON_PrintUnformatted(tagsJson);
  elements->tagsLen = strlen(elements->tags);
  if(is_same_child_table_telnet(elements, &info->preLine) != 0) {
    ret = smlParseTagsFromJSON(info, tagsJson, elements);
    if (unlikely(ret)) {
      uError("OTD:0x%" PRIx64 " Unable to parse tags from JSON payload", info->id);
      taosMemoryFree(elements->tags);
      elements->tags = NULL;
      return ret;
    }
  }

  if(info->dataFormat){
    taosMemoryFree(elements->tags);
    elements->tags = NULL;
  }

  if(unlikely(info->reRun)){
    return TSDB_CODE_SUCCESS;
  }

  // Parse timestamp
  // notice!!! put ts back to tag to ensure get meta->precision
  int64_t ts = smlParseTSFromJSON(info, tsJson);
  if (unlikely(ts < 0)) {
    uError("OTD:0x%" PRIx64 " Unable to parse timestamp from JSON payload", info->id);
    return TSDB_CODE_INVALID_TIMESTAMP;
  }
  SSmlKv kvTs = { .key = TS, .keyLen = TS_LEN, .type = TSDB_DATA_TYPE_TIMESTAMP, .i = ts, .length = (size_t)tDataTypes[TSDB_DATA_TYPE_TIMESTAMP].bytes};

  if(info->dataFormat){
    ret = smlBuildCol(info->currTableDataCtx, info->currSTableMeta->schema, &kvTs, 0);
    if(ret == TSDB_CODE_SUCCESS){
      ret = smlBuildCol(info->currTableDataCtx, info->currSTableMeta->schema, &kv, 1);
    }
    if(ret == TSDB_CODE_SUCCESS){
      ret = smlBuildRow(info->currTableDataCtx);
    }
    if (unlikely(ret != TSDB_CODE_SUCCESS)) {
      smlBuildInvalidDataMsg(&info->msgBuf, "smlBuildCol error", NULL);
      return ret;
    }
  }else{
    if(elements->colArray == NULL){
      elements->colArray = taosArrayInit(16, sizeof(SSmlKv));
    }
    taosArrayPush(elements->colArray, &kvTs);
    taosArrayPush(elements->colArray, &kv);
  }
  info->preLine = *elements;

  return TSDB_CODE_SUCCESS;
}

static int32_t smlParseJSONExt(SSmlHandle *info, char *payload) {
  int32_t payloadNum = 0;
  int32_t ret = TSDB_CODE_SUCCESS;

  if (unlikely(payload == NULL)) {
    uError("SML:0x%" PRIx64 " empty JSON Payload", info->id);
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  info->root = cJSON_Parse(payload);
  if (unlikely(info->root == NULL)) {
    uError("SML:0x%" PRIx64 " parse json failed:%s", info->id, payload);
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  // multiple data points must be sent in JSON array
  if (cJSON_IsArray(info->root)) {
    payloadNum = cJSON_GetArraySize(info->root);
  } else if (cJSON_IsObject(info->root)) {
    payloadNum = 1;
  } else {
    uError("SML:0x%" PRIx64 " Invalid JSON Payload 3:%s", info->id, payload);
    return TSDB_CODE_TSC_INVALID_JSON;
  }

  info->lineNum = payloadNum;
  info->dataFormat = true;
  if (unlikely(info->lines != NULL)) {
    taosMemoryFree(info->lines);
    info->lines = NULL;
  }
  ret = smlClearForRerun(info);
  if(ret != TSDB_CODE_SUCCESS){
    return ret;
  }

  info->parseJsonByLib = true;
  cJSON *head = (payloadNum == 1 && cJSON_IsObject(info->root)) ? info->root : info->root->child;

  int cnt = 0;
  cJSON *dataPoint = head;
  while (dataPoint) {
    if(info->dataFormat) {
      SSmlLineInfo element = {0};
      ret = smlParseJSONStringExt(info, dataPoint, &element);
    }else{
      ret = smlParseJSONStringExt(info, dataPoint, info->lines + cnt);
    }
    if (unlikely(ret != TSDB_CODE_SUCCESS)) {
      uError("SML:0x%" PRIx64 " Invalid JSON Payload 2:%s", info->id, payload);
      return ret;
    }

    if(unlikely(info->reRun)){
      cnt = 0;
      dataPoint = head;
      info->lineNum = payloadNum;
      ret = smlClearForRerun(info);
      if(ret != TSDB_CODE_SUCCESS){
        return ret;
      }
      continue;
    }
    cnt++;
    dataPoint = dataPoint->next;
  }

  return TSDB_CODE_SUCCESS;
}

static int32_t smlParseJSONString(SSmlHandle *info, char **start, SSmlLineInfo *elements) {
  int32_t ret = TSDB_CODE_SUCCESS;

  if(info->offset[0] == 0){
    ret = smlJsonParseObjFirst(start, elements, info->offset);
  }else{
    ret = smlJsonParseObj(start, elements, info->offset);
  }

  if (ret != TSDB_CODE_SUCCESS) {
    return TSDB_CODE_TSC_INVALID_VALUE;
  }

  if(unlikely(**start == '\0' && elements->measure == NULL)) return TSDB_CODE_SUCCESS;

  SSmlKv kv = {.key = VALUE, .keyLen = VALUE_LEN, .value = elements->cols, .length = (size_t)elements->colsLen};
  if (elements->colsLen == 0 || smlParseValue(&kv, &info->msgBuf) != TSDB_CODE_SUCCESS) {
    uError("SML:cols invalidate:%s", elements->cols);
    return TSDB_CODE_TSC_INVALID_VALUE;
  }

  // Parse tags
  if(is_same_child_table_telnet(elements, &info->preLine) != 0){
    char tmp = *(elements->tags + elements->tagsLen);
    *(elements->tags + elements->tagsLen) = 0;
    cJSON* tagsJson = cJSON_Parse(elements->tags);
    *(elements->tags + elements->tagsLen) = tmp;
    if (unlikely(tagsJson == NULL)) {
      uError("SML:0x%" PRIx64 " parse json failed:%s", info->id, elements->tags);
      return TSDB_CODE_TSC_INVALID_JSON;
    }

    ret = smlParseTagsFromJSON(info, tagsJson, elements);
    cJSON_free(tagsJson);
    if (unlikely(ret)) {
      uError("OTD:0x%" PRIx64 " Unable to parse tags from JSON payload", info->id);
      return ret;
    }
  }

  if(unlikely(info->reRun)){
    return TSDB_CODE_SUCCESS;
  }

  // Parse timestamp
  // notice!!! put ts back to tag to ensure get meta->precision
  int64_t ts = smlParseOpenTsdbTime(info, elements->timestamp, elements->timestampLen);
  if (unlikely(ts < 0)) {
    uError("OTD:0x%" PRIx64 " Unable to parse timestamp from JSON payload", info->id);
    return TSDB_CODE_INVALID_TIMESTAMP;
  }
  SSmlKv kvTs = { .key = TS, .keyLen = TS_LEN, .type = TSDB_DATA_TYPE_TIMESTAMP, .i = ts, .length = (size_t)tDataTypes[TSDB_DATA_TYPE_TIMESTAMP].bytes};

  if(info->dataFormat){
    ret = smlBuildCol(info->currTableDataCtx, info->currSTableMeta->schema, &kvTs, 0);
    if(ret == TSDB_CODE_SUCCESS){
      ret = smlBuildCol(info->currTableDataCtx, info->currSTableMeta->schema, &kv, 1);
    }
    if(ret == TSDB_CODE_SUCCESS){
      ret = smlBuildRow(info->currTableDataCtx);
    }
    if (unlikely(ret != TSDB_CODE_SUCCESS)) {
      smlBuildInvalidDataMsg(&info->msgBuf, "smlBuildCol error", NULL);
      return ret;
    }
  }else{
    if(elements->colArray == NULL){
      elements->colArray = taosArrayInit(16, sizeof(SSmlKv));
    }
    taosArrayPush(elements->colArray, &kvTs);
    taosArrayPush(elements->colArray, &kv);
  }
  info->preLine = *elements;

  return TSDB_CODE_SUCCESS;
}

int32_t smlParseJSON(SSmlHandle *info, char *payload) {
  int32_t payloadNum = 1 << 15;
  int32_t ret = TSDB_CODE_SUCCESS;

  int cnt = 0;
  char *dataPointStart = payload;
  while (1) {
    if(info->dataFormat) {
      SSmlLineInfo element = {0};
      ret = smlParseJSONString(info, &dataPointStart, &element);
    }else{
      if(cnt >= payloadNum){
        payloadNum = payloadNum << 1;
        void* tmp = taosMemoryRealloc(info->lines, payloadNum * sizeof(SSmlLineInfo));
        if(tmp != NULL){
          info->lines = (SSmlLineInfo*)tmp;
          memset(info->lines + cnt, 0, (payloadNum - cnt) * sizeof(SSmlLineInfo));
        }
      }
      ret = smlParseJSONString(info, &dataPointStart, info->lines + cnt);
    }
    if (unlikely(ret != TSDB_CODE_SUCCESS)) {
      uError("SML:0x%" PRIx64 " Invalid JSON Payload 1:%s", info->id, payload);
      return smlParseJSONExt(info, payload);
    }

    if(unlikely(info->reRun)){
      cnt = 0;
      dataPointStart = payload;
      info->lineNum = payloadNum;
      ret = smlClearForRerun(info);
      if(ret != TSDB_CODE_SUCCESS){
        return ret;
      }
      continue;
    }

    if(*dataPointStart == '\0') break;
    cnt++;
  }
  info->lineNum = cnt;

  return TSDB_CODE_SUCCESS;
}