//go:build windows

package evidence

import (
	"fmt"
	"syscall"
)

// syncDirectory uses an explicit directory handle because os.Open(...).Sync is not a portable
// Windows directory durability boundary. Any unsupported filesystem or access failure is fatal:
// callers must not make the corresponding evidence row visible in SQLite.
func syncDirectory(path string) error {
	pathPointer, err := syscall.UTF16PtrFromString(path)
	if err != nil {
		return fmt.Errorf("encode directory path for durability sync: %w", err)
	}
	handle, err := syscall.CreateFile(
		pathPointer,
		syscall.GENERIC_WRITE,
		syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
		nil,
		syscall.OPEN_EXISTING,
		syscall.FILE_FLAG_BACKUP_SEMANTICS,
		0,
	)
	if err != nil {
		return fmt.Errorf("open directory for durability sync: %w", err)
	}
	defer syscall.CloseHandle(handle)
	if err := syscall.FlushFileBuffers(handle); err != nil {
		return fmt.Errorf("flush directory metadata: %w", err)
	}
	return nil
}