package console

import (
	"net/http"
	"strings"
	"unicode"
	"unicode/utf8"
)

const (
	activityMessageMaxRunes = 240
	activityMessageHeader   = "X-Carlos-Message"
)

type activityCopy struct {
	Description, Action, Target, Scope, InvalidMessage string
}

var activityText = activityCopy{
	Description:    "Description",
	Action:         "Action",
	Target:         "Target",
	Scope:          "This history includes console actions and CLI actions sent through the console.",
	InvalidMessage: "Message must be one line and 240 characters or fewer.",
}

func validActivityMessage(message string) bool {
	if !utf8.ValidString(message) || utf8.RuneCountInString(message) > activityMessageMaxRunes {
		return false
	}
	for _, r := range message {
		if unicode.IsControl(r) {
			return false
		}
	}
	return true
}

func checkedActivityMessage(w http.ResponseWriter, message string) (string, bool) {
	if !validActivityMessage(message) {
		jsonError(w, http.StatusBadRequest, activityText.InvalidMessage)
		return "", false
	}
	return strings.TrimSpace(message), true
}