package middleware

import (
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/limiter"
)

// SetupRateLimit 设置限流中间件
// 防止API滥用，限制每个IP的请求频率
func SetupRateLimit(maxRequests int, expiration int) fiber.Handler {
	return limiter.New(limiter.Config{
		Max:        maxRequests,
		Expiration: time.Duration(expiration) * time.Second, // 过期时间（秒）
		KeyGenerator: func(c *fiber.Ctx) string {
			return c.IP()
		},
		LimitReached: func(c *fiber.Ctx) error {
			return c.Status(fiber.StatusTooManyRequests).JSON(fiber.Map{
				"success": false,
				"error":   "Rate limit exceeded",
				"message": "Too many requests, please try again later",
			})
		},
	})
}