import React, { useState, useEffect } from 'react';
import { useImmer } from 'use-immer';
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 { StoreListHeader } from './store-list-header';
import { AccordionItem } from './accordion-item';

declare const Application: IApplication;

interface OrdersProps {
  onSuccess: (message: string) => void,
  onError: (message: string) => void,
}
/**
 * Option format, expected by react-select
 * @see https://github.com/JedWatson/react-select
 */
 type selectOption = { value: number, label: string };
 /**
 * Option format, expected by checklist
 */
type checklistOption = { value: number, label: string };
const statusOptions: checklistOption[] = [
  { value: 0, label: 'cart' },
  { value: 1, label: 'paid by credit card' },
  { value: 2, label: 'paid in cash' },
  { value: 3, label: 'being processed' },
  { value: 4, label: 'ready' },
  { value: 5, label: 'delivered' },
  { value: 6, label: 'canceled' },
  { value: 7, label: 'refunded' }
];

/**
 * Admin list of orders
 */
const Orders: React.FC<OrdersProps> = ({ onSuccess, onError }) => {
  const { t } = useTranslation('admin');

  const [filters, setFilters] = useImmer<Filters>(initFilters);
  const [clearFilters, setClearFilters] = useState<boolean>(false);
  const [accordion, setAccordion] = useState({});

  useEffect(() => {
    applyFilters();
    setClearFilters(false);
  }, [clearFilters]);

  /**
   * Create a new order
   */
  const newOrder = () => {
    console.log('Create new order');
  };

  /**
   * Apply filters
   */
  const applyFilters = () => {
    console.log('Apply filters:', filters);
  };

  /**
   * Clear filters
   */
  const clearAllFilters = () => {
    setFilters(initFilters);
    setClearFilters(true);
    console.log('Clear all filters');
  };

  /**
   * Creates sorting options to the react-select format
   */
  const buildOptions = (): Array<selectOption> => {
    return [
      { value: 0, label: t('app.admin.store.orders.sort.newest') },
      { value: 1, label: t('app.admin.store.orders.sort.oldest') }
    ];
  };
  /**
   * Display option: sorting
   */
  const handleSorting = (option: selectOption) => {
    console.log('Sort option:', option);
  };

  /**
   * Filter: by status
   */
  const handleSelectStatus = (s: checklistOption, checked) => {
    const list = [...filters.status];
    checked
      ? list.push(s)
      : list.splice(list.indexOf(s), 1);
    setFilters(draft => {
      return { ...draft, status: list };
    });
  };

  /**
   * Open/close accordion items
   */
  const handleAccordion = (id, state) => {
    setAccordion({ ...accordion, [id]: state });
  };

  return (
    <div className='orders'>
      <header>
        <h2>{t('app.admin.store.orders.heading')}</h2>
        <div className='grpBtn'>
          <FabButton className="main-action-btn" onClick={newOrder}>{t('app.admin.store.orders.create_order')}</FabButton>
        </div>
      </header>

      <div className="store-filters">
        <header>
          <h3>{t('app.admin.store.orders.filter')}</h3>
          <div className='grpBtn'>
            <FabButton onClick={clearAllFilters} className="is-black">{t('app.admin.store.orders.filter_clear')}</FabButton>
          </div>
        </header>
        <div className="accordion">
          <AccordionItem id={0}
            isOpen={accordion[0]}
            onChange={handleAccordion}
            label={t('app.admin.store.orders.filter_status')}
          >
            <div className='content'>
              <div className="list u-scrollbar">
                {statusOptions.map(s => (
                  <label key={s.value}>
                    <input type="checkbox" checked={filters.status.includes(s)} onChange={(event) => handleSelectStatus(s, event.target.checked)} />
                    <p>{s.label}</p>
                  </label>
                ))}
              </div>
              <FabButton onClick={applyFilters} className="is-info">{t('app.admin.store.orders.filter_apply')}</FabButton>
            </div>
          </AccordionItem>
        </div>
      </div>

      <div className="store-list">
        <StoreListHeader
          productsCount={0}
          selectOptions={buildOptions()}
          onSelectOptionsChange={handleSorting}
        />
      </div>
    </div>
  );
};

const OrdersWrapper: React.FC<OrdersProps> = (props) => {
  return (
    <Loader>
      <Orders {...props} />
    </Loader>
  );
};

Application.Components.component('orders', react2angular(OrdersWrapper, ['onSuccess', 'onError']));

interface Filters {
  reference: string,
  status: checklistOption[]
}

const initFilters: Filters = {
  reference: '',
  status: []
};