export type TabBadgeCounts = {
  cases?: number;
  tasks?: number;
  treatment?: number;
};

export type LabCaseTabReadTarget = 'CASES' | 'TASKS' | 'TREATMENT';

const TAB_BADGES_CHANGED_EVENT = 'tab-badges-changed';

export function notifyTabBadgesChanged() {
  window.dispatchEvent(new Event(TAB_BADGES_CHANGED_EVENT));
}

export function tabBadgesChangedEventName() {
  return TAB_BADGES_CHANGED_EVENT;
}

export function tabFromPathname(pathname: string): LabCaseTabReadTarget | null {
  if (pathname === '/cases' || pathname.startsWith('/cases/')) return 'CASES';
  if (pathname === '/tasks' || pathname.startsWith('/tasks/')) return 'TASKS';
  if (pathname === '/treatment' || pathname.startsWith('/treatment/')) return 'TREATMENT';
  return null;
}

export function badgeCountForPath(counts: TabBadgeCounts, pathname: string): number {
  if (pathname === '/cases' || pathname.startsWith('/cases/')) return counts.cases ?? 0;
  if (pathname === '/tasks' || pathname.startsWith('/tasks/')) return counts.tasks ?? 0;
  if (pathname === '/treatment' || pathname.startsWith('/treatment/')) return counts.treatment ?? 0;
  return 0;
}