package handlers

import (
	"sync"
	"time"
)

const resendCooldown = time.Minute

type resendLimiter struct {
	mu   sync.RWMutex
	last map[string]time.Time
}

func (rl *resendLimiter) allow(username string) (ok bool, retryAfter int) {
	rl.mu.Lock()
	defer rl.mu.Unlock()
	if rl.last == nil {
		rl.last = make(map[string]time.Time)
	}
	last := rl.last[username]
	elapsed := time.Since(last)
	if elapsed < resendCooldown {
		return false, int((resendCooldown - elapsed).Seconds())
	}
	return true, 0
}

func (rl *resendLimiter) record(username string) {
	rl.mu.Lock()
	defer rl.mu.Unlock()
	if rl.last == nil {
		rl.last = make(map[string]time.Time)
	}
	rl.last[username] = time.Now()
}

var resendRateLimiter resendLimiter