package quiesce

import (
	"bytes"
	"log"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

// T-S3a: a corrupt marker is quarantined + logged (not silently dropped). Still returns false.
// Companion: pre-fix readMarker (silent return false) → no *.corrupt-* + no log → this fails.
func TestReadMarker_QuarantinesCorrupt(t *testing.T) {
	mp := filepath.Join(t.TempDir(), "quiesce-state.json")
	if err := os.WriteFile(mp, []byte(`{ "active": true, BROKEN not json`), 0o644); err != nil {
		t.Fatal(err)
	}
	var buf bytes.Buffer
	l := New(Options{
		MarkerPath: mp, Poll: time.Hour, StatusPoll: time.Millisecond, MaxQuiesce: time.Second,
		Logger: log.New(&buf, "", 0),
	})
	if _, ok := l.readMarker(); ok {
		t.Fatal("corrupt marker must return ok=false")
	}
	if m, _ := filepath.Glob(mp + ".corrupt-*"); len(m) == 0 {
		t.Error("corrupt marker must be quarantined as *.corrupt-*")
	}
	if !strings.Contains(buf.String(), "corrupt") {
		t.Errorf("expected a WARN about the corrupt marker, got: %q", buf.String())
	}
}

// T-S3b: valid marker → (marker, true), no quarantine (regression).
func TestReadMarker_HappyPath(t *testing.T) {
	mp := filepath.Join(t.TempDir(), "quiesce-state.json")
	if err := os.WriteFile(mp, []byte(`{"active":true,"stopped_stacks":["romm","komga"]}`), 0o644); err != nil {
		t.Fatal(err)
	}
	l := New(Options{
		MarkerPath: mp, Poll: time.Hour, StatusPoll: time.Millisecond, MaxQuiesce: time.Second,
		Logger: log.New(&bytes.Buffer{}, "", 0),
	})
	m, ok := l.readMarker()
	if !ok {
		t.Fatal("valid marker must return ok=true")
	}
	if len(m.StoppedStacks) != 2 {
		t.Errorf("expected 2 stopped stacks, got %d", len(m.StoppedStacks))
	}
	if g, _ := filepath.Glob(mp + ".corrupt-*"); len(g) != 0 {
		t.Error("happy path must NOT quarantine")
	}
}