package web

import (
	"io"
	"log"
	"path/filepath"
	"sync/atomic"
	"testing"
	"time"

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

// R-1282: the household's „later" media restart (03:30) was an in-memory timer — a controller restart before then
// (the night's self-update, a power cut) forgot it and the media apps never saw the new drive. The time is now stored;
// at start it is re-armed, a time that passed while the controller was down fires at once, and it runs ONCE.
// RED-PROOF: make ResumeMediaLater a no-op → the passed case never restarts the apps.
func r1282Server(t *testing.T) (*Server, *settings.Settings, *int32) {
	t.Helper()
	lg := log.New(io.Discard, "", 0)
	sett, err := settings.Load(filepath.Join(t.TempDir(), "settings.json"), lg)
	if err != nil {
		t.Fatal(err)
	}
	var runs int32
	old := mediaLaterRestart
	mediaLaterRestart = func(*Server, string) { atomic.AddInt32(&runs, 1) }
	t.Cleanup(func() { mediaLaterRestart = old })
	return &Server{settings: sett, logger: lg}, sett, &runs
}

func TestR1282_ALaterRestartThatPassedWhileDownRunsOnceAtStart(t *testing.T) {
	s, sett, runs := r1282Server(t)
	if err := sett.SetMediaRestartLater(time.Now().Add(-2 * time.Hour)); err != nil { // 03:30 passed while down
		t.Fatal(err)
	}
	s.ResumeMediaLater()
	deadline := time.Now().Add(2 * time.Second)
	for atomic.LoadInt32(runs) == 0 && time.Now().Before(deadline) {
		time.Sleep(5 * time.Millisecond)
	}
	if n := atomic.LoadInt32(runs); n != 1 {
		t.Fatalf("the passed restart ran %d time(s) at start, want 1", n)
	}
	for !sett.GetMediaRestartLater().IsZero() && time.Now().Before(deadline) {
		time.Sleep(5 * time.Millisecond)
	}
	if !sett.GetMediaRestartLater().IsZero() {
		t.Fatal("the stored time must be cleared once it ran — else the next start runs it again")
	}
	// A second start finds nothing: it ran once.
	s.ResumeMediaLater()
	time.Sleep(50 * time.Millisecond)
	if n := atomic.LoadInt32(runs); n != 1 {
		t.Fatalf("a second start ran it again (%d)", n)
	}
}

func TestR1282_AFutureLaterRestartIsKeptOverAStart(t *testing.T) {
	s, sett, runs := r1282Server(t)
	at := time.Now().Add(1 * time.Hour)
	if err := sett.SetMediaRestartLater(at); err != nil {
		t.Fatal(err)
	}
	s.ResumeMediaLater()
	time.Sleep(50 * time.Millisecond)
	if n := atomic.LoadInt32(runs); n != 0 {
		t.Fatalf("a restart due in an hour ran now (%d)", n)
	}
	s.mediaMu.Lock()
	got, armed := s.mediaLaterAt, s.mediaLaterTmr != nil
	s.mediaMu.Unlock()
	if !armed || !got.Equal(at.UTC().Truncate(time.Second)) && got.Sub(at).Abs() > time.Second {
		t.Fatalf("the timer must be armed for %v, got %v (armed %v)", at, got, armed)
	}
	if s.mediaLaterTmr != nil {
		s.mediaLaterTmr.Stop()
	}
}