package wrapper

/*
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
*/
import "C"
import (
	"bytes"
	"encoding/json"
	"github.com/taosdata/driver-go/v2/errors"
	"unsafe"
)

// TaosSetConfig int   taos_set_config(const char *config);
func TaosSetConfig(params map[string]string) error {
	// danger!! taos_set_config must set params. if set nil or empty map will get error
	if len(params) == 0 {
		return nil
	}
	config, _ := json.Marshal(params)
	cConfig := C.CString(string(config))
	defer C.free(unsafe.Pointer(cConfig))
	result := (C.struct_setConfRet)(C.taos_set_config(cConfig))
	if int(result.retCode) == -5 || int(result.retCode) == 0 {
		return nil
	}
	buf := bytes.NewBufferString("")
	for _, c := range result.retMsg {
		if c == 0 {
			break
		}
		buf.WriteByte(byte(c))
	}
	return &errors.TaosError{Code: int32(result.retCode) & 0xffff, ErrStr: buf.String()}
}