package backup

import (
	"io"
	"log"
	"testing"
	"time"

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

// R-1347: a restore that lifts an UPDATE hold must also forget the stack manager's in-memory „last update ended held"
// flag. Left set, the crash-loop watcher does not watch the app and the night leg skips it until the controller restarts
// (D64's sibling: the operator's clear_hold already forgets it, R-1343; the restore did not).
//
// The consequence on the real flag — ObserveUnhealthy and legCandidate — is TestR1347_RestoreLiftsTheWatchersBlindSpot
// (cmd/controller), and the seam's wiring TestR1347_UpdateHeldForgetterIsWiredAtStartup.
//
// RED-PROOF (2026-11-02): seen failing before the seam existed — the build failed on SetUpdateHeldForgetter; with the
// call dropped from clearUpdateHoldAfterRestore it fails on „the flag was not forgotten".
func TestR1347_ARestoreThatLiftsAnUpdateHoldForgetsTheHeldFlag(t *testing.T) {
	sett := slice4Settings(t)
	m := &Manager{logger: log.New(io.Discard, "", 0), settings: sett}
	forgot := map[string]int{}
	m.SetUpdateHeldForgetter(func(s string) bool { forgot[s]++; return true })

	_ = m.HoldAfterFailedUpdate("nextcloud", time.Now(), time.Now(), UpdateTierLocal)
	m.clearUpdateHoldAfterRestore("nextcloud")
	if _, held := sett.GetRestoreHold("nextcloud"); held {
		t.Fatal("the update hold must be lifted")
	}
	if forgot["nextcloud"] != 1 {
		t.Fatalf("the restore lifted the update hold, but the flag was not forgotten (calls: %v)", forgot)
	}

	// A RESTORE hold (R-379) stays, so nothing about it is forgotten.
	_ = sett.SetRestoreHold(settings.RestoreHold{Stack: "rst", At: "2026-08-22T14:00:00Z"})
	m.clearUpdateHoldAfterRestore("rst")
	if _, held := sett.GetRestoreHold("rst"); !held || forgot["rst"] != 0 {
		t.Fatalf("a restore hold is not lifted by a restore (held %v, forget calls %d)", held, forgot["rst"])
	}

	// No hold at all: nothing to forget (a plain restore of a healthy app).
	m.clearUpdateHoldAfterRestore("plain")
	if forgot["plain"] != 0 {
		t.Fatalf("no hold was lifted, yet the flag was touched %d time(s)", forgot["plain"])
	}

	// nil seam: no crash (the pre-R-1347 behaviour).
	m2 := &Manager{logger: log.New(io.Discard, "", 0), settings: sett}
	_ = m2.HoldAfterFailedUpdate("other", time.Now(), time.Now(), UpdateTierLocal)
	m2.clearUpdateHoldAfterRestore("other")
}