package store

import (
	"sync"
	"time"
)

// Redis 降级时的进程内 ticket 兜底：仅供本地开发/单实例。带惰性过期，避免泄漏。
var (
	memTicketMu sync.Mutex
	memTickets  = map[string]memTicketEntry{}
)

type memTicketEntry struct {
	value    string
	expireAt time.Time
}

func memTicketSet(ticket, value string, ttl time.Duration) {
	memTicketMu.Lock()
	defer memTicketMu.Unlock()
	memTickets[ticket] = memTicketEntry{value: value, expireAt: time.Now().Add(ttl)}
	// 顺带清理已过期项（登录频率低，全表扫无压力）
	now := time.Now()
	for k, e := range memTickets {
		if now.After(e.expireAt) {
			delete(memTickets, k)
		}
	}
}

func memTicketGet(ticket string) string {
	memTicketMu.Lock()
	defer memTicketMu.Unlock()
	e, ok := memTickets[ticket]
	if !ok || time.Now().After(e.expireAt) {
		return ""
	}
	return e.value
}