package web

import (
	"os"
	"strings"
	"testing"
)

// R-1278: a volume app's reinstall said nothing about the backup of the earlier install the box keeps (set aside by
// D47, or left by „remove — keep backups"). The install page now says the install starts empty and links the restore
// page. One render per branch of the gate (the template-gate rule): kept + not installed → shown; none → not shown;
// installed → not shown.
// RED-PROOF: delete the {{if .KeptBackups}} block → the first case fails.
func TestR1278_TheInstallPageOffersTheKeptBackup(t *testing.T) {
	shown := renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 2})
	if !strings.Contains(shown, `data-kept-backups="2"`) || !strings.Contains(shown, `href="/backups/restore"`) {
		t.Fatal("with a kept backup of an earlier install the page must say so and link the restore page")
	}
	if strings.Contains(renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 0}), "kept-backup-offer") {
		t.Fatal("no kept backup → no notice")
	}
	if strings.Contains(renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 1, "AlreadyDeployed": true}), "kept-backup-offer") {
		t.Fatal("an installed app shows no install-time notice")
	}
}

// The page reads the count from the backup manager (seam-built-but-never-wired is a recorded class).
func TestR1278_TheDeployPageAsksTheBackupManager(t *testing.T) {
	b, err := os.ReadFile("handlers.go")
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(b), `data["KeptBackups"] = s.backupMgr.KeptBackupsFor(name)`) {
		t.Fatal("deployPageData must set KeptBackups from the backup manager")
	}
}