package alert_lifecycle

import (
	"errors"
	"strings"
	"unicode/utf8"
)

var (
	ErrNotFound          = errors.New("预警不存在")
	ErrAlreadyHandled    = errors.New("预警已由其他人员开始处理")
	ErrInvalidTransition = errors.New("当前状态不能执行此操作")
	ErrOutcomeRequired   = errors.New("请选择有效的现场结果")
	ErrForbidden         = errors.New("您无权完成此预警")
)

type CloseInput struct {
	Outcome string `json:"outcome"`
	Note    string `json:"note"`
}

func normalizeClose(input CloseInput) (CloseInput, error) {
	input.Outcome = strings.TrimSpace(input.Outcome)
	input.Note = strings.TrimSpace(input.Note)
	switch input.Outcome {
	case "danger_confirmed", "false_positive", "site_normal", "unable_to_confirm":
	default:
		return CloseInput{}, ErrOutcomeRequired
	}
	if !utf8.ValidString(input.Note) || utf8.RuneCountInString(input.Note) > 500 || strings.ContainsAny(input.Note, "\x00\r") {
		return CloseInput{}, ErrOutcomeRequired
	}
	return input, nil
}