package utils

import (
	"errors"
	"reflect"
)

// 此函数将指定的结构体成员值更新到结构体中
func SetStructValueByType(s interface{}, columnType string, columnValue interface{}) error {
	columnValueV := reflect.ValueOf(columnValue)
	var setValue reflect.Value
	var flag = false
	v := reflect.ValueOf(s)
	for i, n := 0, v.Elem().NumField(); i < n; i++ {
		if v.Elem().Type().Field(i).Name == columnType {
			setValue = v.Elem().Field(i)
			flag = true
			break
		}
	}
	if !flag {
		return errors.New("struct is not type:")
	} else if !setValue.CanSet() {
		return errors.New("setValue.CanSet is false")
	} else if setValue.Kind() != columnValueV.Kind() {
		return errors.New("struct field and value of type is error")
	}
	switch columnValueV.Kind() {
	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int, reflect.Int64:
		setValue.SetInt(int64(columnValueV.Int()))
	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		setValue.SetUint(uint64(columnValueV.Uint()))
	case reflect.Float32, reflect.Float64:
		setValue.SetFloat(float64(columnValueV.Float()))
	case reflect.String:
		setValue.SetString(columnValueV.String())
	default:
		return errors.New("columnValue err for:" + columnType)
	}
	return nil
}