package convx

import (
	"errors"
	"strconv"
)

// interface 转 int
func ToInt(val interface{}) (i int, err error) {

	if v, ok := val.(string); ok {
		// 不支持小数转换
		i, err = strconv.Atoi(v)
	} else if v, ok := val.(float32); ok {
		i = int(v)
	} else if v, ok := val.(float64); ok {
		i = int(v)
	} else if v, ok := val.(int); ok {
		i = v
	} else if v, ok := val.(int32); ok {
		i = int(v)
	} else if v, ok := val.(int64); ok {
		i = int(v)
	} else if v, ok := val.(uint); ok {
		i = int(v)
	} else if v, ok := val.(uint32); ok {
		i = int(v)
	} else if v, ok := val.(uint64); ok {
		i = int(v)
	} else if v, ok := val.(bool); ok {
		if v {
			i = 1
		} else {
			i = 0
		}
	} else {
		return 0, errors.New("类型转换失败")
	}
	return
}