/** Feature groups for staff invite/edit UI — matches backend seed */
export const STAFF_FEATURE_GROUPS = [
  { label: 'Today', read: 'TAB_TODAY_READ', edit: 'TAB_TODAY_EDIT' },
  { label: 'Patients', read: 'TAB_PATIENTS_READ', edit: 'TAB_PATIENTS_EDIT' },
  { label: 'Appointments', read: 'TAB_APPOINTMENTS_READ', edit: 'TAB_APPOINTMENTS_EDIT' },
  { label: 'Staff Management', read: 'TAB_STAFF_READ', edit: 'TAB_STAFF_EDIT' },
  { label: 'Lab Management', read: 'TAB_LAB_READ', edit: 'TAB_LAB_EDIT' },
  { label: 'Billing', read: 'TAB_BILLING_READ', edit: 'TAB_BILLING_EDIT' },
  { label: 'Reports', read: 'TAB_REPORTS_READ', edit: 'TAB_REPORTS_EDIT' },
] as const;

/** Map EDIT key -> { read, edit } for checkbox grid */
export type FeaturePermState = Record<string, { read: boolean; edit: boolean }>;

export function emptyFeaturePermissionState(): FeaturePermState {
  const s: FeaturePermState = {};
  for (const g of STAFF_FEATURE_GROUPS) {
    s[g.edit] = { read: false, edit: false };
  }
  return s;
}

export function featureStateFromPermissionNames(names: string[]): FeaturePermState {
  const set = new Set(names);
  const s = emptyFeaturePermissionState();
  for (const g of STAFF_FEATURE_GROUPS) {
    const hasEdit = set.has(g.edit);
    const hasRead = set.has(g.read) || hasEdit;
    s[g.edit] = { read: hasRead, edit: hasEdit };
  }
  return s;
}

export function permissionNamesFromFeatureState(state: FeaturePermState): string[] {
  const out: string[] = [];
  for (const g of STAFF_FEATURE_GROUPS) {
    const cell = state[g.edit];
    if (!cell) continue;
    if (cell.edit) out.push(g.edit);
    else if (cell.read) out.push(g.read);
  }
  return out;
}