import React from 'react';
import { useHistory } from 'react-router-dom';
import { Formik, Form } from 'formik';
import { Intent } from '@blueprintjs/core';
import intl from 'react-intl-universal';
import { sumBy, omit, isEmpty } from 'lodash';
import classNames from 'classnames';
import { CLASSES } from 'common/classes';
import {
  CreateCreditNoteFormSchema,
  EditCreditNoteFormSchema,
} from './CreditNoteForm.schema';

import CreditNoteFormHeader from './CreditNoteFormHeader';
import CreditNoteItemsEntriesEditorField from './CreditNoteItemsEntriesEditorField';
import CreditNoteFormFooter from './CreditNoteFormFooter';
import CreditNoteFloatingActions from './CreditNoteFloatingActions';
import CreditNoteFormDialogs from './CreditNoteFormDialogs';

import { AppToaster } from 'components';

import { useCreditNoteFormContext } from './CreditNoteFormProvider';
import {
  filterNonZeroEntries,
  transformToEditForm,
  transformFormValuesToRequest,
  defaultCreditNote,
} from './utils';

import {
  compose,
  orderingLinesIndexes,
  transactionNumber,
  safeSumBy,
} from 'utils';

import withSettings from 'containers/Settings/withSettings';
import withCurrentOrganization from 'containers/Organization/withCurrentOrganization';

/**
 * Credit note form.
 */
function CreditNoteForm({
  // #withSettings
  creditAutoIncrement,
  creditNumberPrefix,
  creditNextNumber,

  // #withCurrentOrganization
  organization: { base_currency },
}) {
  const history = useHistory();

  // Credit note form context.
  const {
    isNewMode,
    submitPayload,
    creditNote,
    createCreditNoteMutate,
    editCreditNoteMutate,
  } = useCreditNoteFormContext();

  // Credit number.
  const creditNumber = transactionNumber(creditNumberPrefix, creditNextNumber);

  // Initial values.
  const initialValues = React.useMemo(
    () => ({
      ...(!isEmpty(creditNote)
        ? { ...transformToEditForm(creditNote), currency_code: base_currency }
        : {
            ...defaultCreditNote,
            ...(creditAutoIncrement && {
              credit_note_number: creditNumber,
            }),
            entries: orderingLinesIndexes(defaultCreditNote.entries),
          }),
    }),
    [],
  );

  // Handles form submit.
  const handleFormSubmit = (
    values,
    { setSubmitting, setErrors, resetForm },
  ) => {
    const entries = filterNonZeroEntries(values.entries);
    const totalQuantity = safeSumBy(entries, 'quantity');

    if (totalQuantity === 0) {
      AppToaster.show({
        message: intl.get('quantity_cannot_be_zero_or_empty'),
        intent: Intent.DANGER,
      });
      setSubmitting(false);
      return;
    }
    const form = {
      ...transformFormValuesToRequest(values),
    };
    // Handle the request success.
    const onSuccess = (response) => {
      AppToaster.show({
        message: intl.get(
          isNewMode
            ? 'credit_note.success_message'
            : 'credit_note.edit_success_message',
        ),
        intent: Intent.SUCCESS,
      });
      setSubmitting(false);

      if (submitPayload.redirect) {
        history.push('/credit-notes');
      }
      if (submitPayload.resetForm) {
        resetForm();
      }
    };
    // Handle the request error.
    const onError = ({
      response: {
        data: { errors },
      },
    }) => {
      setSubmitting(false);
    };
    if (isNewMode) {
      createCreditNoteMutate(form).then(onSuccess).catch(onError);
    } else {
      editCreditNoteMutate([creditNote.id, form])
        .then(onSuccess)
        .catch(onError);
    }
  };

  return (
    <div
      className={classNames(
        CLASSES.PAGE_FORM,
        CLASSES.PAGE_FORM_STRIP_STYLE,
        CLASSES.PAGE_FORM_CREDIT_NOTE,
      )}
    >
      <Formik
        validationSchema={
          isNewMode ? CreateCreditNoteFormSchema : EditCreditNoteFormSchema
        }
        initialValues={initialValues}
        onSubmit={handleFormSubmit}
      >
        <Form>
          <CreditNoteFormHeader />
          <CreditNoteItemsEntriesEditorField />
          <CreditNoteFormFooter />
          <CreditNoteFloatingActions />
          <CreditNoteFormDialogs />
        </Form>
      </Formik>
    </div>
  );
}
export default compose(
  withSettings(({ creditNoteSettings }) => ({
    creditAutoIncrement: creditNoteSettings?.autoIncrement,
    creditNextNumber: creditNoteSettings?.nextNumber,
    creditNumberPrefix: creditNoteSettings?.numberPrefix,
  })),
  withCurrentOrganization(),
)(CreditNoteForm);