import React, { useEffect, useState } from 'react';
import { useNavigate, useParams } from 'react-router-dom';
import { toast } from 'react-toastify';
import {
  Button,
  Card,
  Col,
  Form,
  Input,
  Row,
  Select,
  Spin,
  Switch,
} from 'antd';
import { shallowEqual, useDispatch, useSelector } from 'react-redux';
import { disableRefetch, removeFromMenu, setMenuData } from 'redux/slices/menu';
import unitService from 'services/unit';
import { fetchUnits } from 'redux/slices/unit';
import LanguageList from 'components/language-list';
import { useTranslation } from 'react-i18next';

export default function UnitEdit() {
  const { t } = useTranslation();
  const { activeMenu } = useSelector((state) => state.menu, shallowEqual);
  const { id } = useParams();
  const dispatch = useDispatch();
  const [form] = Form.useForm();
  const navigate = useNavigate();
  const [loading, setLoading] = useState(false);
  const [loadingBtn, setLoadingBtn] = useState(false);

  const { defaultLang, languages } = useSelector(
    (state) => state.formLang,
    shallowEqual,
  );

  useEffect(() => {
    return () => {
      const data = form.getFieldsValue(true);
      dispatch(setMenuData({ activeMenu, data }));
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  const fetchUnit = (id) => {
    setLoading(true);
    unitService
      .getById(id)
      .then(({ data }) => {
        const translations = getLanguageFields(data);
        form.setFieldsValue({ ...data, ...translations });
      })
      .finally(() => {
        setLoading(false);
        dispatch(disableRefetch(activeMenu));
      });
  };

  function getLanguageFields(data) {
    if (!data) {
      return {};
    }
    const { translations } = data;
    const result = languages.map((item) => ({
      [`title[${item.locale}]`]: translations.find(
        (el) => el.locale === item.locale,
      )?.title,
    }));
    return Object.assign({}, ...result);
  }

  const onFinish = (values) => {
    const body = {
      ...values,
      active: values.active ? 1 : 0,
    };
    setLoadingBtn(true);
    const nextUrl = 'catalog/units';
    unitService
      .update(id, body)
      .then(() => {
        toast.success(t('successfully.updated'));
        dispatch(removeFromMenu({ ...activeMenu, nextUrl }));
        navigate(`/${nextUrl}`);
        dispatch(fetchUnits());
      })
      .finally(() => setLoadingBtn(false));
  };

  useEffect(() => {
    if (activeMenu.refetch) fetchUnit(id);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [activeMenu.refetch]);

  return (
    <Card title={t('edit.unit')} extra={<LanguageList />}>
      {!loading ? (
        <Form
          name='basic'
          layout='vertical'
          onFinish={onFinish}
          form={form}
          initialValues={{ ...activeMenu.data }}
        >
          <Row gutter={12}>
            <Col span={12}>
              {languages.map((item, idx) => (
                <Form.Item
                  key={'title' + idx}
                  label={t('title')}
                  name={`title[${item.locale}]`}
                  rules={[
                    {
                      validator(_, value) {
                        if (!value && item.locale === defaultLang) {
                          return Promise.reject(new Error(t('required')));
                        } else if (value && value?.trim() === '') {
                          return Promise.reject(new Error(t('no.empty.space')));
                        } else if (value?.length < 2) {
                          return Promise.reject(
                            new Error(t('must.be.at.least.2')),
                          );
                        }
                        return Promise.resolve();
                      },
                    },
                  ]}
                  hidden={item.locale !== defaultLang}
                >
                  <Input />
                </Form.Item>
              ))}
            </Col>
            <Col span={12}>
              <div className='col-md-12 col-sm-6'>
                <Form.Item
                  label={t('position')}
                  name='position'
                  rules={[
                    {
                      required: true,
                      message: t('required'),
                    },
                  ]}
                >
                  <Select>
                    <Select.Option value='after'>{t('after')}</Select.Option>
                    <Select.Option value='before'>{t('before')}</Select.Option>
                  </Select>
                </Form.Item>
              </div>
            </Col>

            <Col span={6}>
              <div className='col-md-12 col-sm-6'>
                <Form.Item
                  label={t('active')}
                  name='active'
                  valuePropName='checked'
                >
                  <Switch />
                </Form.Item>
              </div>
            </Col>
          </Row>
          <Button type='primary' htmlType='submit' loading={loadingBtn}>
            {t('save')}
          </Button>
        </Form>
      ) : (
        <div className='d-flex justify-content-center align-items-center'>
          <Spin size='large' className='py-5' />
        </div>
      )}
    </Card>
  );
}
