package ui

import (
	"io/fs"
	"strings"
	"testing"
)

// TestAssetsShipEverythingThePageNeeds guards the embed: a missing asset would
// only surface as a broken page at runtime, since the CSP forbids CDNs.
func TestAssetsShipEverythingThePageNeeds(t *testing.T) {
	assets := Assets()
	for _, name := range []string{"index.html", "app.css", "app.js"} {
		if _, err := fs.Stat(assets, name); err != nil {
			t.Errorf("asset %s missing: %v", name, err)
		}
	}
}

func TestIndexReferencesLocalAssetsOnly(t *testing.T) {
	b, err := fs.ReadFile(Assets(), "index.html")
	if err != nil {
		t.Fatalf("read index.html: %v", err)
	}
	html := string(b)
	if strings.Contains(html, "//cdn.") || strings.Contains(html, "https://") {
		t.Error("index.html references an external origin; the CSP blocks those")
	}
	for _, want := range []string{`href="app.css"`, `src="app.js"`, `id="new-form"`, `id="rows"`} {
		if !strings.Contains(html, want) {
			t.Errorf("index.html is missing %s", want)
		}
	}
}