package e

import "github.com/goccy/go-json"

const (
	UnKnow           = 1
	ValidErr         = 1000
	DbErr            = 2020
	IllegalPhone     = 2001
	NoAuth           = 401
	NoUser           = 2003
	ExistingUserName = 2004
	UnmarshalReqErr  = 3000
	Ordinary         = 6666
)

func init() {
	m := map[int]string{
		UnKnow:           "未定义错误",
		ValidErr:         "无效的请求参数",
		DbErr:            "数据库错误",
		IllegalPhone:     "请输入正确的手机号码",
		NoAuth:           "未授权",
		NoUser:           "未找到对应用户",
		ExistingUserName: "已经存在的用户",
		UnmarshalReqErr:  "参数类型错误",
	}

	errMap[UnKnow] = &ApiError{
		Status:  500,
		Code:    UnKnow,
		Message: "未定义错误",
	}

	for k, v := range m {
		errMap[k] = &ApiError{
			Status:  200,
			Code:    k,
			Message: v,
		}
	}
}

var errMap = map[int]*ApiError{}

func NewCode(code int) *ApiError {
	if e, ok := errMap[code]; ok {
		return e
	}
	return errMap[UnKnow]
}
func NewString(msg string) *ApiError {
	return &ApiError{
		Status:  200,
		Code:    Ordinary,
		Message: msg,
	}
}
func newErr(err *ApiError) *ApiError {
	return &(*err)
}
func NewValidErr(err error) error {
	if _, ok := err.(*json.UnmarshalTypeError); ok {
		return newErr(errMap[UnmarshalReqErr])
	}
	return err
}

func (e *ApiError) Set(msg string) *ApiError {
	r := *e
	r.Message = msg
	return &r
}

type ApiError struct {
	Status  int    `json:"-"`
	Code    int    `json:"code"`
	Message string `json:"msg"`
}

func (e *ApiError) Error() string {
	return e.Message
}