package middleware

import (
	"net/http"
	"net/http/httptest"
	"testing"
	"vctp/version"
)

func TestCacheMiddlewareDev(t *testing.T) {
	orig := version.Value
	version.Value = "dev"
	defer func() { version.Value = orig }()

	rr := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/assets/css/web3.css", nil)
	h := CacheMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
	}))

	h.ServeHTTP(rr, req)

	if got := rr.Header().Get("Cache-Control"); got != "no-cache, no-store, must-revalidate" {
		t.Fatalf("unexpected Cache-Control: %q", got)
	}
	if got := rr.Header().Get("Pragma"); got != "no-cache" {
		t.Fatalf("unexpected Pragma: %q", got)
	}
	if got := rr.Header().Get("Expires"); got != "0" {
		t.Fatalf("unexpected Expires: %q", got)
	}
	if got := rr.Header().Get("Vary"); got != "Accept-Encoding" {
		t.Fatalf("unexpected Vary: %q", got)
	}
}

func TestCacheMiddlewareProd(t *testing.T) {
	orig := version.Value
	version.Value = "1.2.3"
	defer func() { version.Value = orig }()

	rr := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/assets/css/web3.css?v=1.2.3", nil)
	h := CacheMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
	}))

	h.ServeHTTP(rr, req)

	if got := rr.Header().Get("Cache-Control"); got != "public, max-age=31536000, immutable" {
		t.Fatalf("unexpected Cache-Control: %q", got)
	}
	if rr.Header().Get("Expires") == "" {
		t.Fatalf("expected Expires header")
	}
	if got := rr.Header().Get("Vary"); got != "Accept-Encoding" {
		t.Fatalf("unexpected Vary: %q", got)
	}
	if got := rr.Header().Get("Pragma"); got != "" {
		t.Fatalf("expected no Pragma in prod, got %q", got)
	}
}

func TestCacheMiddlewareProdUnversionedStillCached(t *testing.T) {
	orig := version.Value
	version.Value = "1.2.3"
	defer func() { version.Value = orig }()

	rr := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/swagger/swagger-ui.css", nil)
	h := CacheMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
	}))

	h.ServeHTTP(rr, req)

	if got := rr.Header().Get("Cache-Control"); got != "public, max-age=31536000" {
		t.Fatalf("unexpected Cache-Control: %q", got)
	}
	if rr.Header().Get("Expires") == "" {
		t.Fatalf("expected Expires header")
	}
}