package middleware

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

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
)

func TestRateLimiter(t *testing.T) {
	limiter := NewRateLimiter(5, time.Second)

	// Should allow first 5 requests
	for i := 0; i < 5; i++ {
		assert.True(t, limiter.Allow("test-key"), "Request %d should be allowed", i+1)
	}

	// Should block 6th request
	assert.False(t, limiter.Allow("test-key"), "6th request should be blocked")

	// Wait for window to reset
	time.Sleep(time.Second + 100*time.Millisecond)

	// Should allow requests again
	assert.True(t, limiter.Allow("test-key"), "Request after reset should be allowed")
}

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

	router := gin.New()
	router.Use(RateLimit(2, time.Second))
	router.GET("/test", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"message": "success"})
	})

	// First request should succeed
	req1 := httptest.NewRequest(http.MethodGet, "/test", nil)
	w1 := httptest.NewRecorder()
	router.ServeHTTP(w1, req1)
	assert.Equal(t, http.StatusOK, w1.Code)

	// Second request should succeed
	req2 := httptest.NewRequest(http.MethodGet, "/test", nil)
	w2 := httptest.NewRecorder()
	router.ServeHTTP(w2, req2)
	assert.Equal(t, http.StatusOK, w2.Code)

	// Third request should be rate limited
	req3 := httptest.NewRequest(http.MethodGet, "/test", nil)
	w3 := httptest.NewRecorder()
	router.ServeHTTP(w3, req3)
	assert.Equal(t, http.StatusTooManyRequests, w3.Code)
}

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

	router := gin.New()
	router.Use(func(c *gin.Context) {
		c.Set("user_id", "user123")
		c.Next()
	})
	router.Use(RateLimitByUser(2, time.Second))
	router.GET("/test", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"message": "success"})
	})

	// First two requests should succeed
	for i := 0; i < 2; i++ {
		req := httptest.NewRequest(http.MethodGet, "/test", nil)
		w := httptest.NewRecorder()
		router.ServeHTTP(w, req)
		assert.Equal(t, http.StatusOK, w.Code)
	}

	// Third request should be rate limited
	req := httptest.NewRequest(http.MethodGet, "/test", nil)
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)
	assert.Equal(t, http.StatusTooManyRequests, w.Code)
}