//go:build linux

package artifact

import (
	"context"
	"errors"
	"path/filepath"
	"syscall"
	"testing"
	"time"

	"gitea.maximumdirect.net/eric/promptkit/internal/domain"
)

func TestFileReaderRejectsFIFOBeforeOpen(t *testing.T) {
	path := filepath.Join(t.TempDir(), "artifact.fifo")
	if err := syscall.Mkfifo(path, 0o600); err != nil {
		t.Fatalf("create fifo: %v", err)
	}

	type result struct {
		artifact *domain.Artifact
		err      error
	}
	done := make(chan result, 1)
	go func() {
		artifact, err := NewCompositeReader().Read(context.Background(), domain.ArtifactRef{
			Type: domain.ArtifactRefFile,
			URI:  path,
		})
		done <- result{artifact: artifact, err: err}
	}()

	select {
	case got := <-done:
		if got.artifact != nil || !errors.Is(got.err, ErrUnsupportedFile) {
			t.Fatalf("artifact=%#v err=%v, want nil/ErrUnsupportedFile", got.artifact, got.err)
		}
	case <-time.After(time.Second):
		t.Fatal("FIFO read blocked instead of rejecting the non-regular file")
	}
}