package middleware

import (
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/gin-gonic/gin"
)

func TestRateLimitByIP_BlocksAfterLimit(t *testing.T) {
	gin.SetMode(gin.TestMode)

	r := gin.New()
	// 1 request per hour, burst 1 => second immediate request should 429.
	r.Use(RateLimitByIP(1, time.Hour, 1, time.Minute))
	r.GET("/", func(c *gin.Context) { c.String(200, "ok") })

	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.RemoteAddr = "203.0.113.10:1234"

	w1 := httptest.NewRecorder()
	r.ServeHTTP(w1, req)
	if w1.Code != http.StatusOK {
		t.Fatalf("first request code = %d, want %d", w1.Code, http.StatusOK)
	}

	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req)
	if w2.Code != http.StatusTooManyRequests {
		t.Fatalf("second request code = %d, want %d", w2.Code, http.StatusTooManyRequests)
	}
}

func TestRateLimitByIP_AllowsBurst(t *testing.T) {
	gin.SetMode(gin.TestMode)

	r := gin.New()
	// 1 per hour, but burst 2 => first two immediate requests should pass.
	r.Use(RateLimitByIP(1, time.Hour, 2, time.Minute))
	r.GET("/", func(c *gin.Context) { c.String(200, "ok") })

	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.RemoteAddr = "203.0.113.11:1234"

	w1 := httptest.NewRecorder()
	r.ServeHTTP(w1, req)
	if w1.Code != http.StatusOK {
		t.Fatalf("first request code = %d, want %d", w1.Code, http.StatusOK)
	}

	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req)
	if w2.Code != http.StatusOK {
		t.Fatalf("second request code = %d, want %d", w2.Code, http.StatusOK)
	}

	w3 := httptest.NewRecorder()
	r.ServeHTTP(w3, req)
	if w3.Code != http.StatusTooManyRequests {
		t.Fatalf("third request code = %d, want %d", w3.Code, http.StatusTooManyRequests)
	}
}