import React, { useState } from 'react';
import { useTranslation } from 'react-i18next';
import { react2angular } from 'react2angular';
import { Loader } from '../base/loader';
import { IApplication } from '../../models/application';
import { FabButton } from '../base/fab-button';
import useCart from '../../hooks/use-cart';
import FormatLib from '../../lib/format';
import CartAPI from '../../api/cart';
import { User } from '../../models/user';
import { PaymentModal } from '../payment/stripe/payment-modal';
import { PaymentMethod } from '../../models/payment';
import { Order } from '../../models/order';
import { MemberSelect } from '../user/member-select';
import { CouponInput } from '../coupon/coupon-input';
import { Coupon } from '../../models/coupon';
import { computePriceWithCoupon } from '../../lib/coupon';
import noImage from '../../../../images/no_image.png';

declare const Application: IApplication;

interface StoreCartProps {
  onSuccess: (message: string) => void,
  onError: (message: string) => void,
  userLogin: () => void,
  currentUser?: User
}

/**
 * This component shows user's cart
 */
const StoreCart: React.FC<StoreCartProps> = ({ onSuccess, onError, currentUser, userLogin }) => {
  const { t } = useTranslation('public');

  const { cart, setCart } = useCart(currentUser);
  console.log('cart: ', cart);
  const [paymentModal, setPaymentModal] = useState<boolean>(false);

  /**
   * Remove the product from cart
   */
  const removeProductFromCart = (item) => {
    return (e: React.BaseSyntheticEvent) => {
      e.preventDefault();
      e.stopPropagation();
      CartAPI.removeItem(cart, item.orderable_id).then(data => {
        setCart(data);
      }).catch(onError);
    };
  };

  /**
   * Change product quantity
   */
  const changeProductQuantity = (item) => {
    return (e: React.BaseSyntheticEvent) => {
      CartAPI.setQuantity(cart, item.orderable_id, e.target.value).then(data => {
        setCart(data);
      }).catch(onError);
    };
  };

  /**
   * Checkout cart
   */
  const checkout = () => {
    if (!currentUser) {
      userLogin();
    } else {
      setPaymentModal(true);
    }
  };

  /**
   * Open/closes the payment modal
   */
  const togglePaymentModal = (): void => {
    setPaymentModal(!paymentModal);
  };

  /**
   * Handle payment
   */
  const handlePaymentSuccess = (data: Order): void => {
    if (data.payment_state === 'paid') {
      setPaymentModal(false);
      window.location.href = '/#!/store';
      onSuccess(t('app.public.store_cart.checkout_success'));
    } else {
      onError(t('app.public.store_cart.checkout_error'));
    }
  };

  /**
   * Change cart's customer by admin/manger
   */
  const handleChangeMember = (userId: number): void => {
    setCart({ ...cart, user: { id: userId, role: 'member' } });
  };

  /**
   * Check if the current operator has administrative rights or is a normal member
   */
  const isPrivileged = (): boolean => {
    return (currentUser?.role === 'admin' || currentUser?.role === 'manager');
  };

  /**
   * Check if the current cart is empty ?
   */
  const cartIsEmpty = (): boolean => {
    return cart && cart.order_items_attributes.length === 0;
  };

  /**
   * Apply coupon to current cart
   */
  const applyCoupon = (coupon?: Coupon): void => {
    if (coupon !== cart.coupon) {
      setCart({ ...cart, coupon });
    }
  };

  /**
   * Get the offered item total
   */
  const offeredAmount = (): number => {
    return cart.order_items_attributes
      .filter(i => i.is_offered)
      .map(i => i.amount)
      .reduce((acc, curr) => acc + curr, 0);
  };

  return (
    <div className='store-cart'>
      <div className="store-cart-list">
        {cart && cartIsEmpty() && <p>{t('app.public.store_cart.cart_is_empty')}</p>}
        {cart && cart.order_items_attributes.map(item => (
          <article key={item.id} className='store-cart-list-item'>
            <div className='picture'>
              <img alt=''src={noImage} />
            </div>
            <div className="ref">
              <span>{t('app.public.store_cart.reference_short')} </span>
              <p>{item.orderable_name}</p>
            </div>
            <div className="actions">
              <div className='price'>
                <p>{FormatLib.price(item.amount)}</p>
                <span>/ {t('app.public.store_cart.unit')}</span>
              </div>
              <select value={item.quantity} onChange={changeProductQuantity(item)}>
                {Array.from({ length: 100 }, (_, i) => i + 1).map(v => (
                  <option key={v} value={v}>{v}</option>
                ))}
              </select>
              <div className='total'>
                <span>{t('app.public.store_cart.total')}</span>
                <p>{FormatLib.price(item.quantity * item.amount)}</p>
              </div>
              <FabButton className="main-action-btn" onClick={removeProductFromCart(item)}>
                <i className="fa fa-trash" />
              </FabButton>
            </div>
          </article>
        ))}
      </div>

      <div className="group">
        <div className='store-cart-info'>
          <h3>{t('app.public.store_cart.pickup')}</h3>
          <p>[TODO: texte venant des paramètres de la boutique…]</p>
        </div>

        {cart && !cartIsEmpty() && cart.user &&
          <div className='store-cart-coupon'>
            <CouponInput user={cart.user as User} amount={cart.total} onChange={applyCoupon} />
          </div>
        }
      </div>

      <aside>
        {cart && !cartIsEmpty() && isPrivileged() &&
          <div> <MemberSelect onSelected={handleChangeMember} /></div>
        }

        {cart && !cartIsEmpty() && <>
          <div className="checkout">
            <h3>{t('app.public.store_cart.checkout_header')}</h3>
            <span>{t('app.public.store_cart.checkout_products_COUNT', { COUNT: cart?.order_items_attributes.length })}</span>
            <div className="list">
              <p>{t('app.public.store_cart.checkout_products_total')} <span>{FormatLib.price(cart.total)}</span></p>
              {offeredAmount() > 0 &&
                <p className='gift'>{t('app.public.store_cart.checkout_gift_total')} <span>-{FormatLib.price(offeredAmount())}</span></p>
              }
              {cart.coupon && computePriceWithCoupon(cart.total, cart.coupon) !== cart.total &&
                <p>{t('app.public.store_cart.checkout_coupon')} <span>{FormatLib.price(-(cart.total - computePriceWithCoupon(cart.total, cart.coupon)))}</span></p>
              }
            </div>
            <p className='total'>{t('app.public.store_cart.checkout_total')} <span>{FormatLib.price(computePriceWithCoupon(cart.total, cart.coupon))}</span></p>
          </div>
          <FabButton className='checkout-btn' onClick={checkout} disabled={!cart.user || cart.order_items_attributes.length === 0}>
            {t('app.public.store_cart.checkout')}
          </FabButton>
        </>}
      </aside>

      {cart && !cartIsEmpty() && cart.user && <div>
        <PaymentModal isOpen={paymentModal}
          toggleModal={togglePaymentModal}
          afterSuccess={handlePaymentSuccess}
          onError={onError}
          cart={{ customer_id: cart.user.id, items: [], payment_method: PaymentMethod.Card }}
          order={cart}
          operator={currentUser}
          customer={cart.user as User}
          updateCart={() => 'dont need update shopping cart'} />
      </div>}
    </div>
  );
};

const StoreCartWrapper: React.FC<StoreCartProps> = (props) => {
  return (
    <Loader>
      <StoreCart {...props} />
    </Loader>
  );
};

Application.Components.component('storeCart', react2angular(StoreCartWrapper, ['onSuccess', 'onError', 'currentUser', 'userLogin']));