package agent

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

func testSpool(t *testing.T) *Spool {
	t.Helper()
	now := time.Date(2026, 9, 18, 0, 0, 0, 0, time.UTC)
	s, err := NewSpool(t.TempDir(), func() time.Time { return now })
	if err != nil {
		t.Fatal(err)
	}
	return s
}

func TestSpoolAtomicStateAndBootUnknown(t *testing.T) {
	s := testSpool(t)
	if _, err := s.Start("exec-1", 1, "session-1"); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Update("exec-1", "running", ""); err != nil {
		t.Fatal(err)
	}
	report, err := s.MarkUnknownOnBoot()
	if err != nil {
		t.Fatal(err)
	}
	if len(report.Unknown) != 1 || report.Unknown[0] != "exec-1" {
		t.Fatalf("recovery report = %+v", report)
	}
	state, err := s.Load("exec-1")
	if err != nil {
		t.Fatal(err)
	}
	if state.Status != "unknown" || !state.Unknown {
		t.Fatalf("state = %+v", state)
	}
}

func TestSpoolQuarantinesCorruptStateAndNeverDeletesIt(t *testing.T) {
	s := testSpool(t)
	if err := os.MkdirAll(filepath.Join(s.Root(), "broken"), 0o700); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(s.Root(), "broken", "state.json"), []byte("{"), 0o600); err != nil {
		t.Fatal(err)
	}
	report, err := s.MarkUnknownOnBoot()
	if err != nil {
		t.Fatal(err)
	}
	if len(report.Quarantined) != 1 || len(report.Unknown) != 0 {
		t.Fatalf("recovery report = %+v", report)
	}
	matches, err := filepath.Glob(filepath.Join(s.Root(), "broken", "state.json.corrupt-*"))
	if err != nil || len(matches) != 1 {
		t.Fatalf("quarantine files = %v, err=%v", matches, err)
	}
}

func TestSpoolTranscriptAndAssetAreDurableFiles(t *testing.T) {
	s := testSpool(t)
	if _, err := s.Start("exec-2", 1, "session-2"); err != nil {
		t.Fatal(err)
	}
	if err := s.AppendTranscript("exec-2", []byte(`{"text":"hello","final":true}`)); err != nil {
		t.Fatal(err)
	}
	path, n, hash, err := s.WriteAsset("exec-2", "recording.pcm", bytes.NewReader([]byte("pcm")))
	if err != nil {
		t.Fatal(err)
	}
	if n != 3 || hash == "" || path == "" {
		t.Fatalf("asset result path=%q bytes=%d hash=%q", path, n, hash)
	}
	if _, err := os.Stat(filepath.Join(s.Root(), "exec-2", "assets", "recording.pcm.part")); !os.IsNotExist(err) {
		t.Fatalf("temporary asset still exists: %v", err)
	}
}