/**
 * Cart + checkout API helpers for authenticated storefront checkout sync & Razorpay payment.
 */
import { apiFetch } from './client';

export interface SyncCartItem {
  variant_id: string;
  qty: number;
}

export interface CheckoutCreateResponse {
  order_id: string;
  order_no: string;
  total_amount: number;
  tax_amount?: number;
  shipping_cost?: number;
  final_amount: number;
  status: string;
  payment_status: string;
  payment_method?: string;
  invoice_id?: string | null;
  invoice_no?: string | null;
}

export interface CustomerAddress {
  address_id: string;
  address_type: string;
  full_name: string;
  phone: string;
  street_address: string;
  city: string;
  state: string;
  pincode: string;
  is_default: boolean;
}

export interface RazorpayInitiateResponse {
  order_id: string;
  rzp_order_id: string;
  rzp_key_id: string;
  amount: number;
  currency: string;
  security_token: string;
  zero_amount?: boolean;
  status?: string;
  invoice_id?: string | null;
  invoice_no?: string | null;
}

export async function syncCartItems(items: SyncCartItem[]) {
  return apiFetch<{ message: string; cart_id: string }>('/api/v1/cart/items', {
    method: 'PUT',
    body: JSON.stringify({ items }),
  });
}

export async function createCheckoutOrder(payload: {
  address_id: string;
  payment_method?: string;
  coupon_code?: string;
}) {
  return apiFetch<CheckoutCreateResponse>('/api/v1/checkout/create', {
    method: 'POST',
    body: JSON.stringify({
      address_id: payload.address_id,
      payment_method: payload.payment_method || 'COD',
      coupon_code: payload.coupon_code,
    }),
  });
}

export async function fetchCustomerAddresses() {
  return apiFetch<CustomerAddress[]>('/api/v1/customer/profile/addresses');
}

export async function createCustomerAddress(address: Omit<CustomerAddress, 'address_id'> & { address_id?: string }) {
  return apiFetch<CustomerAddress>('/api/v1/customer/profile/addresses', {
    method: 'POST',
    body: JSON.stringify(address),
  });
}

export async function initiatePayment(order_id: string) {
  return apiFetch<RazorpayInitiateResponse>('/api/v1/payment/initiate', {
    method: 'POST',
    body: JSON.stringify({ order_id }),
  });
}

export async function cancelPayment(order_id: string, reason?: string) {
  return apiFetch<{ status: string; message: string }>('/api/v1/payment/cancel', {
    method: 'POST',
    body: JSON.stringify({ order_id, reason }),
  });
}

export async function verifyPayment(payload: {
  order_id: string;
  razorpay_order_id: string;
  razorpay_payment_id: string;
  razorpay_signature: string;
}) {
  return apiFetch<{
    status: string;
    message: string;
    order_id: string;
    order_no: string;
    invoice_id?: string | null;
    invoice_no?: string | null;
  }>('/api/v1/payment/verify', {
    method: 'POST',
    body: JSON.stringify(payload),
  });
}