package web

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

// v0.263.0 — after the box UNDID a failed update, the app page carries one line saying so, in the
// REQUEST's language. Driven through the REAL handler (appDetailHandler) and the REAL template, both
// languages, and the other language's sentence asserted GONE — the composed-sentence class
// (R-573/R-590/R-596/R-598) is only found this way.
//
// COMPANION RED-PROOF (REPORT.md): drop the UpdateUndoneLine block from appDetailHandler — neither
// language then carries the line, and this test fails on the first assertion.
func TestUndo_PageSaysTheBoxPutTheAppBack(t *testing.T) {
	s, _ := credsHarness(t)
	sd := filepath.Join(s.cfg.Paths.StacksDir, "crafty")
	app := "deployed: true\nlast_update_undone:\n    to:\n        web: crafty:2.0.0\n    at: \"2026-09-23T08:03:00Z\"\n    why: \"not healthy\"\n"
	if err := os.WriteFile(filepath.Join(sd, "app.yaml"), []byte(app), 0o644); err != nil {
		t.Fatal(err)
	}
	_ = s.stackMgr.ScanStacks()
	s.loadTemplates()

	render := func(lang string) string {
		rr := httptest.NewRecorder()
		s.appDetailHandler(rr, httptest.NewRequest("GET", "/apps/crafty?lang="+lang, nil), "crafty")
		return html.UnescapeString(rr.Body.String())
	}
	en, hu := render("en"), render("hu")
	const enLine, huLine = "The box put back the previous version and its data automatically", "A doboz automatikusan visszaállította az előző változatot és az adatokat"
	if !strings.Contains(en, enLine) || !strings.Contains(en, "crafty") {
		t.Errorf("the English page must carry the undone line")
	}
	if strings.Contains(en, huLine) {
		t.Errorf("the Hungarian sentence must be GONE from the English page")
	}
	if !strings.Contains(hu, huLine) || strings.Contains(hu, enLine) {
		t.Errorf("the Hungarian page must carry the Hungarian line and not the English one")
	}
	if !strings.Contains(hu, "data-update-undone") {
		t.Errorf("the line must render in its own marked alert")
	}
}