import { Cart } from './store';

const getApiConfig = () => {
  const apiRoot = (window as any).woonoowCustomer?.apiRoot || '/wp-json/woonoow/v1';
  const nonce = (window as any).woonoowCustomer?.nonce || '';
  return { apiRoot, nonce };
};

/**
 * Update cart item quantity via API
 */
export async function updateCartItemQuantity(
  cartItemKey: string,
  quantity: number
): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart/update`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
    body: JSON.stringify({
      cart_item_key: cartItemKey,
      quantity,
    }),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.message || 'Failed to update cart');
  }

  const data = await response.json();
  return data.cart;
}

/**
 * Remove item from cart via API
 */
export async function removeCartItem(cartItemKey: string): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart/remove`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
    body: JSON.stringify({
      cart_item_key: cartItemKey,
    }),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.message || 'Failed to remove item');
  }

  const data = await response.json();
  return data.cart;
}

/**
 * Clear entire cart via API
 */
export async function clearCartAPI(): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart/clear`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.message || 'Failed to clear cart');
  }

  const data = await response.json();
  return data.cart;
}

/**
 * Fetch current cart from API
 */
export async function fetchCart(): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart`, {
    method: 'GET',
    headers: {
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
  });

  if (!response.ok) {
    throw new Error('Failed to fetch cart');
  }

  const data = await response.json();
  return data;
}

/**
 * Apply coupon to cart via API
 */
export async function applyCoupon(couponCode: string): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart/apply-coupon`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
    body: JSON.stringify({
      coupon_code: couponCode,
    }),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.message || 'Failed to apply coupon');
  }

  const data = await response.json();
  return data.cart;
}

/**
 * Remove coupon from cart via API
 */
export async function removeCoupon(couponCode: string): Promise<Cart> {
  const { apiRoot, nonce } = getApiConfig();

  const response = await fetch(`${apiRoot}/cart/remove-coupon`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
    },
    credentials: 'include',
    body: JSON.stringify({
      coupon_code: couponCode,
    }),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.message || 'Failed to remove coupon');
  }

  const data = await response.json();
  return data.cart;
}