package ui

import (
	"regexp"
	"strings"
	"testing"
)

func TestDirectDOMDereferencesExist(t *testing.T) {
	app, err := Files.ReadFile("static/app.js")
	if err != nil {
		t.Fatal(err)
	}
	html, err := Files.ReadFile("static/index.html")
	if err != nil {
		t.Fatal(err)
	}

	page := string(html)
	idPattern := regexp.MustCompile(`id="([^"]+)"`)
	ids := map[string]bool{}
	for _, m := range idPattern.FindAllStringSubmatch(page, -1) {
		ids[m[1]] = true
	}

	// A direct $('#id').property dereference is fatal when the element does not
	// exist. This exact class of regression previously stopped all state renders.
	derefPattern := regexp.MustCompile(`\$\('#([^']+)'\)\.[A-Za-z_]`)
	for _, m := range derefPattern.FindAllStringSubmatch(string(app), -1) {
		if !ids[m[1]] {
			t.Errorf("app.js directly dereferences missing DOM id %q", m[1])
		}
	}
}

func TestSystemStatusRenderIsIsolated(t *testing.T) {
	app, err := Files.ReadFile("static/app.js")
	if err != nil {
		t.Fatal(err)
	}
	js := string(app)
	if strings.Contains(js, "$('#stt').title") || strings.Contains(js, "$('#tts').title") {
		t.Fatal("legacy voice selectors would abort renderState")
	}
	if !strings.Contains(js, "safeRender('system-status',renderSystemStatus)") {
		t.Fatal("system status render must be isolated from domain renderers")
	}
}