export const Permission = {
  MANAGE_ALL: 'MANAGE_ALL',
  PROCESS_MANUALLY: 'PROCESS_MANUALLY',
  VIEW_MAIL: 'VIEW_MAIL',
  VIEW_INBOX: 'VIEW_INBOX',
  VIEW_SCANNER: 'VIEW_SCANNER',
  MANAGE_SETTINGS: 'MANAGE_SETTINGS',
  VIEW_FREIGABE: 'VIEW_FREIGABE',
  VIEW_ZAHLUNG: 'VIEW_ZAHLUNG',
} as const;

export type Permission = (typeof Permission)[keyof typeof Permission];

export function mapGroupsToPermissions(
  groups: string[] | undefined | null,
): Permission[] {
  const permissions = new Set<Permission>();

  if (!groups || !Array.isArray(groups)) {
    return [];
  }

  if (groups.includes('PM_Admin')) {
    permissions.add(Permission.MANAGE_ALL);
    permissions.add(Permission.PROCESS_MANUALLY);
    permissions.add(Permission.VIEW_MAIL);
    permissions.add(Permission.VIEW_INBOX);
    permissions.add(Permission.VIEW_SCANNER);
    permissions.add(Permission.MANAGE_SETTINGS);
    permissions.add(Permission.VIEW_FREIGABE);
    permissions.add(Permission.VIEW_ZAHLUNG);
    return Array.from(permissions);
  }

  if (groups.includes('PM_Belege'))
    permissions.add(Permission.PROCESS_MANUALLY);
  if (groups.includes('PM_Maileingang')) permissions.add(Permission.VIEW_MAIL);
  if (groups.includes('PM_Posteingang')) permissions.add(Permission.VIEW_INBOX);
  if (groups.includes('PM_Scanner')) permissions.add(Permission.VIEW_SCANNER);
  if (groups.includes('PM_Freigabe')) permissions.add(Permission.VIEW_FREIGABE);
  if (groups.includes('PM_Zahlung')) permissions.add(Permission.VIEW_ZAHLUNG);

  return Array.from(permissions);
}