package web

import (
	"os"
	"strings"
	"testing"

	"gitea.dooplex.hu/admin/felhom-controller/internal/backup"
	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
)

// R-487 — a removed app whose unit was kept renders on the backups page with the restore that brings
// it back; a page without such rows carries none of it (the negative control).
func TestR487_BackupsPageListsARemovedAppWithItsRestore(t *testing.T) {
	data := splitTestData()
	data["AppBackupRows"] = []AppBackupRow{
		{StackName: "calibre-web", DisplayName: "Calibre-Web"},
		{StackName: "gone-app", DisplayName: "Gone", Removed: true, RemovedUnitTime: "2026-09-13T00:30:00Z", StorageLabel: "HDD"},
	}
	html := renderBackupPage(t, "backups_apps", data)
	for _, want := range []string{
		`name="stack_name" value="gone-app"`,
		`name="snapshot_id" value="helyi"`,
		`action="/backup/restore"`,
		`class="layer-badge">Megtartva<`,
	} {
		if !strings.Contains(html, want) {
			t.Errorf("removed row must render %q", want)
		}
	}
	if strings.Count(html, `class="layer-badge">Megtartva<`) != 1 {
		t.Error("the kept badge must render for the removed row only")
	}
	control := renderBackupPage(t, "backups_apps", splitTestData())
	if strings.Contains(control, "Megtartva") || strings.Contains(control, `value="helyi"`) {
		t.Error("negative control: a page with no removed app must not offer the restore")
	}
}

// R-487 — the restore picker lists removed apps in their own group.
func TestR487_RestorePickerListsRemovedApps(t *testing.T) {
	data := splitTestData()
	data["RemovedApps"] = []backup.RemovedAppUnit{{StackName: "gone-app", DisplayName: "Gone"}}
	html := renderBackupPage(t, "backups_restore", data)
	if !strings.Contains(html, `<option value="gone-app" data-removed="true"`) {
		t.Error("removed app must be an option in the picker")
	}
	if strings.Contains(renderBackupPage(t, "backups_restore", splitTestData()), "data-removed") {
		t.Error("negative control: no removed apps, no group")
	}
}

// r487Provider is the smallest stack provider that can say "this app is not deployed".
type r487Provider struct{ deployed []string }

func (p *r487Provider) GetStackComposePath(name string) (string, bool) {
	for _, s := range p.deployed {
		if s == name {
			return "/stacks/" + name + "/docker-compose.yml", true
		}
	}
	return "", false
}
func (p *r487Provider) ListDeployedStacks() []backup.StackSummary {
	out := make([]backup.StackSummary, 0, len(p.deployed))
	for _, s := range p.deployed {
		out = append(out, backup.StackSummary{Name: s})
	}
	return out
}
func (p *r487Provider) GetStackHDDMounts(string) []string { return nil }
func (p *r487Provider) GetStackHDDPath(string) string     { return "" }
func (p *r487Provider) GetImportRoot() string             { return "" }
func (p *r487Provider) GetDockerVolumes(string) []string  { return nil }
func (p *r487Provider) StopStack(string) error            { return nil }
func (p *r487Provider) StartStack(string) error           { return nil }
func (p *r487Provider) RefreshAndIsRunning(string) bool   { return true }
func (p *r487Provider) GetStackRecoveryInfo(string) (backup.RecoveryInfo, bool) {
	return backup.RecoveryInfo{}, false
}
func (p *r487Provider) RecoverStackSecrets(string, []string) map[string]string { return nil }
func (p *r487Provider) RecreateStackDefinitionFromUnit(string, string, map[string]string) error {
	return nil
}
func (p *r487Provider) StartStackServices(string, []string) error { return nil }
func (p *r487Provider) GetStackClassifiedBinds(string) ([]backup.ClassifiedBind, bool) {
	return nil, false
}

// R-487 — the page's row builder appends a removed app's kept unit after the deployed rows, from the
// real manager over a real drive layout (the seam is the provider, and it says only "not deployed").
func TestR487_BuildAppBackupRowsAppendsRemovedApps(t *testing.T) {
	s := testServer(t)
	sys := t.TempDir()
	cfg := &config.Config{}
	cfg.Paths.SystemDataPath = sys
	mgr := backup.NewManager(cfg, s.settings, s.logger)
	mgr.SetStackProvider(&r487Provider{})
	s.backupMgr = mgr
	unit := backup.RecoveryUnitPath(backup.NamespaceRootFor(sys, sys), "gone-app")
	if err := os.MkdirAll(unit, 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(backup.UnitManifestFile(unit), []byte(`{"schema_version":2,"app_name":"gone-app","display_name":"Gone","created_at":"2026-09-12T02:15:29Z"}`), 0o644); err != nil {
		t.Fatal(err)
	}
	rows := s.buildAppBackupRows(&backup.FullBackupStatus{})
	if len(rows) != 1 || rows[0].StackName != "gone-app" || !rows[0].Removed || rows[0].DisplayName != "Gone" || rows[0].RemovedUnitTime == "" {
		t.Fatalf("want one removed row for gone-app, got %+v", rows)
	}
}