package middleware

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

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

func TestRequestID_GeneratesNew(t *testing.T) {
	r := gin.New()
	r.Use(RequestID())
	r.GET("/test", func(c *gin.Context) {
		rid := RequestIDFromGin(c)
		assert.NotEmpty(t, rid)
		c.Status(http.StatusOK)
	})

	w := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/test", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusOK, w.Code)
	assert.NotEmpty(t, w.Header().Get(RequestIDHeader))
}

func TestRequestID_UsesExisting(t *testing.T) {
	r := gin.New()
	r.Use(RequestID())
	r.GET("/test", func(c *gin.Context) {
		c.Status(http.StatusOK)
	})

	w := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/test", nil)
	req.Header.Set(RequestIDHeader, "my-custom-rid")
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusOK, w.Code)
	assert.Equal(t, "my-custom-rid", w.Header().Get(RequestIDHeader))
}