package fileops

import (
	"fmt"
	"os"
	"strings"
)

// WorkspaceDirectoryMode is the POSIX mode for ordinary, shareable workspace
// directories. The set-group-ID bit preserves the configured workspace group
// for nested files and directories.
const WorkspaceDirectoryMode os.FileMode = os.ModeSetgid | 0o775

// WorkspaceFileMode is the POSIX mode for ordinary, shareable workspace files.
const WorkspaceFileMode os.FileMode = 0o664

// EnsureWorkspaceDirectory creates directory and makes every directory created
// for it conform to the ordinary workspace sharing contract. Existing
// directories retain their owner and group; only their mode is updated.
func EnsureWorkspaceDirectory(directory string) error {
	if strings.TrimSpace(directory) == "" {
		return fmt.Errorf("workspace directory is required")
	}

	if err := ensureConfinedDirectory(directory, WorkspaceDirectoryMode); err != nil {
		return fmt.Errorf("set workspace directory permissions %q: %w", directory, err)
	}
	return nil
}