/**
 * useReadinessGate
 *
 * Single source of truth for the "can this account take a billing action"
 * gate. A user must have:
 *   - a verified email (account.emailVerified)
 *   - a complete profile (account.isProfileComplete — driven by domain
 *     checkProfileCompleteness, which now covers Pflichtangaben for
 *     non-PERSONAL accounts)
 *
 * Both handleSelectPlan (new plan choice) and handleCompletePending (pay
 * an existing pending transaction) must funnel through this — silently
 * routing an incomplete user to /dashboard/checkout was the bug.
 *
 * (c) 2026 TWWIM UG. All rights reserved. (www.twwim.com)
 */

import { useCallback } from 'react';
import { useAuthenticatedUser } from '@/features/auth/hooks/useAuthenticatedUser';

export interface ReadinessGate {
  /** True when the user can proceed to a billing action without intervention. */
  ready: boolean;
  /**
   * Wraps a billing action so it only runs when the gate is open. When the
   * gate is closed, calls `onBlocked` (typically `() => setShowReadinessModal(true)`)
   * and returns false so the caller can short-circuit.
   */
  attempt: (proceed: () => void, onBlocked: () => void) => boolean;
}

export function useReadinessGate(): ReadinessGate {
  const authed = useAuthenticatedUser();
  const account = authed?.account;
  const ready = !!account && account.isProfileComplete && account.emailVerified;

  const attempt = useCallback(
    (proceed: () => void, onBlocked: () => void): boolean => {
      if (!ready) {
        onBlocked();
        return false;
      }
      proceed();
      return true;
    },
    [ready],
  );

  return { ready, attempt };
}