package errorcode

import (
	"fmt"
	"net/http"
)

var (
	Success                   = NewError(0, "成功")
	ServerError               = NewError(10000000, "服务内部错误")
	InvalidParams             = NewError(10000001, "入参错误")
	NotFound                  = NewError(10000002, "找不到")
	UnauthorizedAuthNotExist  = NewError(10000003, "鉴权失败，找不到对应的 AppKey 和 AppSecret")
	UnauthorizedTokenError    = NewError(10000004, "鉴权失败，Token 错误")
	UnauthorizedTokenTimeout  = NewError(10000005, "鉴权失败，Token 超时")
	UnauthorizedTokenGenerate = NewError(10000006, "鉴权失败，Token 生成失败")
	TooManyRequests           = NewError(10000007, "请求过多")
)

type Error struct {
	code    int      `json:"code"`
	msg     string   `json:"msg"`
	details []string `json:"details"`
}

var codes = map[int]string{}

func NewError(code int, msg string) *Error {
	if _, ok := codes[code]; ok {
		panic(fmt.Sprintf("错误码 %d 已经存在，请更换一个", code))
	}
	codes[code] = msg
	return &Error{code: code, msg: msg}
}

func (e *Error) Error() string {
	return fmt.Sprintf("错误码：%d, 错误信息:：%s", e.Code(), e.Msg())
}

func (e *Error) Code() int {
	return e.code
}

func (e *Error) Msg() string {
	return e.msg
}

func (e *Error) Msgf(args []interface{}) string {
	return fmt.Sprintf(e.msg, args...)
}

func (e *Error) Details() []string {
	return e.details
}

func (e *Error) WithDetails(details ...string) *Error {
	newError := *e
	newError.details = []string{}
	for _, d := range details {
		newError.details = append(newError.details, d)
	}

	return &newError
}

func (e *Error) StatusCode() int {
	switch e.Code() {
	case Success.Code():
		return http.StatusOK
	case ServerError.Code():
		return http.StatusInternalServerError
	case InvalidParams.Code():
		return http.StatusBadRequest
	case UnauthorizedAuthNotExist.Code():
		fallthrough
	case UnauthorizedTokenError.Code():
		fallthrough
	case UnauthorizedTokenGenerate.Code():
		fallthrough
	case UnauthorizedTokenTimeout.Code():
		return http.StatusUnauthorized
	case TooManyRequests.Code():
		return http.StatusTooManyRequests
	}

	return http.StatusInternalServerError
}