package web

import (
	"io/fs"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

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

func TestSPA(t *testing.T) {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	Register(r)

	get := func(path string) *httptest.ResponseRecorder {
		w := httptest.NewRecorder()
		r.ServeHTTP(w, httptest.NewRequest(http.MethodGet, path, nil))
		return w
	}

	for _, p := range []string{"/admin/ui/", "/admin/ui/addons/123", "/admin/ui/index.html"} {
		w := get(p)
		if w.Code != http.StatusOK || !strings.Contains(w.Header().Get("Content-Type"), "text/html") {
			t.Errorf("%s: got %d %s", p, w.Code, w.Header().Get("Content-Type"))
		}
		if w.Header().Get("Content-Security-Policy") == "" {
			t.Errorf("%s: missing CSP", p)
		}
	}

	if w := get("/admin/ui/assets/missing.js"); w.Code != http.StatusNotFound {
		t.Errorf("missing asset: got %d, want 404", w.Code)
	}
	if w := get("/admin"); w.Code != http.StatusFound || w.Header().Get("Location") != "/admin/ui/" {
		t.Errorf("/admin: got %d -> %s", w.Code, w.Header().Get("Location"))
	}

	// when the UI is built, hashed assets are served with long caching
	sub, _ := fs.Sub(dist, "dist")
	entries, _ := fs.ReadDir(sub, "assets")
	for _, e := range entries {
		w := get("/admin/ui/assets/" + e.Name())
		if w.Code != http.StatusOK || !strings.Contains(w.Header().Get("Cache-Control"), "immutable") {
			t.Errorf("asset %s: got %d cache %q", e.Name(), w.Code, w.Header().Get("Cache-Control"))
		}
		break
	}
}