package entity

import (
	"fmt"
	"regexp"
)

const (
	// BotCount is how many seeded robot accounts the seed command ensures.
	BotCount = 100
	// BotEmailDomain is the reserved mailbox domain for seed bots (not OTP-free).
	BotEmailDomain = "spark.bot"
)

var botEmailRe = regexp.MustCompile(`^bot(0[0-9]{2}|100)@spark\.bot$`)

// BotEmail returns bot001@spark.bot … bot100@spark.bot.
func BotEmail(index int) string {
	if index < 1 || index > BotCount {
		return ""
	}
	return fmt.Sprintf("bot%03d@%s", index, BotEmailDomain)
}

// BotSparkID returns sparkbot001 … sparkbot100 (ValidSparkID length).
func BotSparkID(index int) string {
	if index < 1 || index > BotCount {
		return ""
	}
	return fmt.Sprintf("sparkbot%03d", index)
}

// IsBotEmail reports whether email is a seeded robot mailbox.
func IsBotEmail(email string) bool {
	return botEmailRe.MatchString(NormalizeEmail(email))
}

// WelcomeBotIndex is the robot friended to every formal/test user for greetings.
const WelcomeBotIndex = 1

// SampleGroupBotCount is how many robots join the English sample group (owner + peers).
const SampleGroupBotCount = 8

// SampleGroupName is the seeded multi-bot English sample chat.
const SampleGroupName = "Spark Samples"