// Check if a customer address is in a delivery zone
async function checkDeliveryEligibility(params: {
  customerZip: string;
  deliveryZones: { name: string; zipCodes: string[]; deliveryFeeCents: number }[];
}): Promise<{ eligible: boolean; zone?: string; feeCents?: number }> {
  const zone = params.deliveryZones.find(z => z.zipCodes.includes(params.customerZip));
  if (!zone) return { eligible: false };
  return { eligible: true, zone: zone.name, feeCents: zone.deliveryFeeCents };
}

// Get available time slots for today (slots with remaining capacity)
async function getAvailableSlots(params: {
  date: Date;
  zone: string;
  slots: { id: string; label: string; capacity: number; booked: number; cutoffTime: Date }[];
}): Promise<{ id: string; label: string; spotsRemaining: number }[]> {
  const now = new Date();
  return params.slots
    .filter(slot => slot.cutoffTime > now && slot.booked < slot.capacity)
    .map(slot => ({
      id: slot.id,
      label: slot.label,
      spotsRemaining: slot.capacity - slot.booked,
    }));
}

// Dispatch a delivery via DoorDash Drive API
async function dispatchDoorDashDelivery(params: {
  externalDeliveryId: string;
  pickupAddress: Address;
  dropoffAddress: Address;
  customerPhone: string;
  pickupWindow: { startTime: string; endTime: string }; // ISO 8601
}): Promise<{ trackingUrl: string; fee: number }> {
  const response = await fetch('https://openapi.doordash.com/drive/v2/deliveries', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${process.env.DOORDASH_DRIVE_JWT}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      external_delivery_id: params.externalDeliveryId,
      pickup_address: `${params.pickupAddress.street1}, ${params.pickupAddress.city}, ${params.pickupAddress.state} ${params.pickupAddress.zip}`,
      dropoff_address: `${params.dropoffAddress.street1}, ${params.dropoffAddress.city}, ${params.dropoffAddress.state} ${params.dropoffAddress.zip}`,
      dropoff_phone_number: params.customerPhone,
      pickup_time: params.pickupWindow.startTime,
    }),
  });
  const data = await response.json();
  return { trackingUrl: data.tracking_url, fee: data.fee };
}