/**
 * Staff route only: tab matrix + checkbox state ↔ TAB_* permission names.
 * Add presentational pieces under ./components/ as the UI grows.
 */

export const STAFF_FEATURE_GROUPS = [
  { label: 'Today', read: 'TAB_TODAY_READ', edit: 'TAB_TODAY_EDIT' },
  { label: 'Staff', read: 'TAB_STAFF_READ', edit: 'TAB_STAFF_EDIT' },
  { label: 'Organizations', read: 'TAB_ORGANIZATIONS_READ', edit: 'TAB_ORGANIZATIONS_EDIT' },
  { label: 'Patients', read: 'TAB_PATIENTS_READ', edit: 'TAB_PATIENTS_EDIT' },
  { label: 'Appointment', read: 'TAB_APPOINTMENTS_READ', edit: 'TAB_APPOINTMENTS_EDIT' },
  { label: 'Treatment', read: 'TAB_TREATMENT_READ', edit: 'TAB_TREATMENT_EDIT' },
  { label: 'Billing', read: 'TAB_BILLING_READ', edit: 'TAB_BILLING_EDIT' },
  { label: 'Reports', read: 'TAB_REPORTS_READ', edit: 'TAB_REPORTS_EDIT' },
] as const;

export type FeaturePermState = Record<string, { read: boolean; edit: boolean }>;
export type OrgType = 'CLINIC' | 'LAB' | null | undefined;

export function resolveStaffFeatureLabel(
  group: (typeof STAFF_FEATURE_GROUPS)[number],
  organizationType: OrgType,
): string {
  if (group.read === 'TAB_ORGANIZATIONS_READ') {
    return organizationType === 'LAB' ? 'Clinics' : 'Labs';
  }
  return group.label;
}

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;
}

/** Human-readable access for the team table — feature name, or "Feature (Read only)" */
export function formatAccessSummary(
  permissionNames: string[] | null | undefined,
  organizationType?: OrgType,
): string {
  if (!permissionNames?.length) return 'No tab access';
  const set = new Set(permissionNames);
  const parts: string[] = [];
  for (const g of STAFF_FEATURE_GROUPS) {
    const hasEdit = set.has(g.edit);
    const hasRead = set.has(g.read) || hasEdit;
    if (!hasRead) continue;
    const label = resolveStaffFeatureLabel(g, organizationType);
    parts.push(hasEdit ? label : `${label} (Read only)`);
  }
  return parts.length ? parts.join(' · ') : 'No tab access';
}