package static

import (
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"
)

func TestHandlerDisablesCachingForApplicationShell(t *testing.T) {
	dir := t.TempDir()
	if err := os.WriteFile(filepath.Join(dir, "index.html"), []byte("index"), 0o600); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "app-config.js"), []byte("config"), 0o600); err != nil {
		t.Fatal(err)
	}

	handler := Handler(dir, http.NotFoundHandler())
	for _, path := range []string{"/", "/index.html", "/app-config.js", "/users"} {
		response := httptest.NewRecorder()
		handler.ServeHTTP(response, httptest.NewRequest(http.MethodGet, path, nil))
		if got := response.Header().Get("Cache-Control"); got != "no-store" {
			t.Fatalf("%s Cache-Control=%q, want no-store", path, got)
		}
	}
}

func TestHandlerCachesHashedAssetsImmutably(t *testing.T) {
	dir := t.TempDir()
	assets := filepath.Join(dir, "assets")
	if err := os.Mkdir(assets, 0o700); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(assets, "app-1234.js"), []byte("app"), 0o600); err != nil {
		t.Fatal(err)
	}

	response := httptest.NewRecorder()
	Handler(dir, http.NotFoundHandler()).ServeHTTP(response, httptest.NewRequest(http.MethodGet, "/assets/app-1234.js", nil))
	if got := response.Header().Get("Cache-Control"); got != "public, max-age=31536000, immutable" {
		t.Fatalf("asset Cache-Control=%q", got)
	}
}