import type { LocationQuery } from 'vue-router';

export function sanitizeRedirectPath(value: unknown): string | null {
  if (typeof value !== 'string' || !value.startsWith('/') || value.startsWith('//')) {
    return null;
  }
  return value;
}

export function redirectFromQuery(query: LocationQuery, fallback = '/app'): string {
  return sanitizeRedirectPath(query.redirect) ?? fallback;
}

export function loginRouteWithRedirect(redirectPath: string) {
  return {
    name: 'login' as const,
    query: { redirect: redirectPath },
  };
}

export function businessBookingPath(businessId: string, hash?: string) {
  const normalizedHash = hash?.replace(/^#/, '');
  const base = `/app/businesses/${businessId}`;
  return normalizedHash ? `${base}#${normalizedHash}` : base;
}

export function bookingDestination(
  businessId: string,
  isLoggedIn: boolean,
  hash?: string,
) {
  if (!isLoggedIn) {
    return loginRouteWithRedirect(businessBookingPath(businessId, hash));
  }

  const normalizedHash = hash?.replace(/^#/, '');
  return {
    name: 'app-business-detail' as const,
    params: { id: businessId },
    ...(normalizedHash ? { hash: normalizedHash } : {}),
  };
}