package convx

import (
	"errors"
	"strconv"
)

// interface 转 string
func ToString(val interface{}) (str string, err error) {

	var s string
	if vv, ok := val.(float32); ok {
		s = strconv.FormatFloat(float64(vv), 'f', -1, 32)
	} else if vv, ok := val.(float64); ok {
		s = strconv.FormatFloat(vv, 'f', -1, 64)
	} else if vv, ok := val.(int); ok {
		s = strconv.Itoa(vv)
	} else if vv, ok := val.(int32); ok {
		s = strconv.Itoa(int(vv))
	} else if vv, ok := val.(int64); ok {
		s = strconv.FormatInt(vv, 10)
	} else if vv, ok := val.(string); ok {
		s = vv
	} else if vv, ok := val.(bool); ok {
		s = strconv.FormatBool(vv)
	} else if vv, ok := val.(uint); ok {
		s = strconv.FormatUint(uint64(vv), 10)
	} else if vv, ok := val.(uint32); ok {
		s = strconv.FormatUint(uint64(vv), 10)
	} else if vv, ok := val.(uint64); ok {
		s = strconv.FormatUint(vv, 10)
	} else if vv, ok := val.(uint8); ok {
		s = strconv.FormatUint(uint64(vv), 10)
	} else if vv, ok := val.(uint16); ok {
		s = strconv.FormatUint(uint64(vv), 10)
	} else if vv, ok := val.(int8); ok {
		s = strconv.FormatInt(int64(vv), 10)
	} else if vv, ok := val.(int16); ok {
		s = strconv.FormatInt(int64(vv), 10)
	} else {
		return s, errors.New("不支持的参数类型")
	}
	return s, nil
}