import { Registration } from './registration';
import { herregistratieDeadline, isHerregistratieEligible } from './registration.policy';

/**
 * What the dashboard's "Wat moet ik regelen" list needs. Pure presentation data
 * derived from the registration — no Angular. Mirrors the shared TaskItem shape.
 */
export interface PortalTask {
  title: string;
  description: string;
  to: string;
  actionLabel: string;
}

function formatNL(d: Date): string {
  return d.toLocaleDateString('nl-NL', { day: 'numeric', month: 'long', year: 'numeric' });
}

/**
 * Derive the open tasks for a professional from their registration (pure;
 * `today` is injected so it's testable). Herregistratie within its window is the
 * primary action; a suspended/struck-off registration surfaces as a notice-task.
 * Reuses the same rules the detail/summary use (registration.policy).
 */
export function tasksFromProfile(reg: Registration, today: Date): PortalTask[] {
  const tasks: PortalTask[] = [];

  if (isHerregistratieEligible(reg, today)) {
    const deadline = herregistratieDeadline(reg);
    tasks.push({
      title: 'Vraag uw herregistratie aan',
      description: deadline
        ? `Verleng uw registratie vóór ${formatNL(deadline)}.`
        : 'U kunt nu uw herregistratie aanvragen.',
      to: '/herregistratie',
      actionLabel: 'Herregistratie aanvragen',
    });
  }

  if (reg.status.tag === 'Geschorst') {
    tasks.push({
      title: 'Uw registratie is geschorst',
      description: reg.status.reden,
      to: '/registratie',
      actionLabel: 'Bekijk uw gegevens',
    });
  }

  if (reg.status.tag === 'Doorgehaald') {
    tasks.push({
      title: 'Uw registratie is doorgehaald',
      description: reg.status.reden,
      to: '/registratie',
      actionLabel: 'Bekijk uw gegevens',
    });
  }

  return tasks;
}