// @flow
import * as MODALS from 'constants/modal_types';
import { REMOVE } from 'constants/icons';
import React from 'react';
import Button from 'component/button';
import { Form, FormField } from 'component/common/form';
import { Formik } from 'formik';
import { validateSendTx } from 'util/form-validation';
import Card from 'component/common/card';

type DraftTransaction = {
  address: string,
  amount: ?number, // So we can use a placeholder in the input
};

type Props = {
  openModal: (id: string, { address: string, amount: number }) => void,
  balance: number,
  history: { goBack: () => void },
};

class WalletSend extends React.PureComponent<Props> {
  constructor() {
    super();

    (this: any).handleSubmit = this.handleSubmit.bind(this);
  }

  handleSubmit(values: DraftTransaction) {
    const { openModal } = this.props;
    const { address, amount } = values;
    if (amount && address) {
      const modalProps = { address, amount };
      openModal(MODALS.CONFIRM_TRANSACTION, modalProps);
    }
  }

  render() {
    const { balance, history } = this.props;

    return (
      <Card
        title={
          <React.Fragment>
            {__('Send Credits')}
            <Button button="close" icon={REMOVE} onClick={() => history.goBack()} />
          </React.Fragment>
        }
        subtitle={__('Send LBC to your friends or favorite creators.')}
        actions={
          <Formik
            initialValues={{
              address: '',
              amount: '',
            }}
            onSubmit={this.handleSubmit}
            validate={validateSendTx}
            render={({ values, errors, touched, handleChange, handleBlur, handleSubmit }) => (
              <Form onSubmit={handleSubmit}>
                <fieldset-group class="fieldset-group--smushed">
                  <FormField
                    type="number"
                    name="amount"
                    label={__('Amount')}
                    postfix={__('LBC')}
                    className="form-field--price-amount"
                    affixClass="form-field--fix-no-height"
                    min="0"
                    step="any"
                    placeholder="12.34"
                    onChange={handleChange}
                    onBlur={handleBlur}
                    value={values.amount}
                  />

                  <FormField
                    type="text"
                    name="address"
                    placeholder="bbFxRyXXXXXXXXXXXZD8nE7XTLUxYnddTs"
                    className="form-field--address"
                    label={__('Recipient address')}
                    onChange={handleChange}
                    onBlur={handleBlur}
                    value={values.address}
                  />
                </fieldset-group>
                <div className="card__actions">
                  <Button
                    button="primary"
                    type="submit"
                    label={__('Send')}
                    disabled={
                      !values.address ||
                      !!Object.keys(errors).length ||
                      !(parseFloat(values.amount) > 0.0) ||
                      parseFloat(values.amount) === balance
                    }
                  />
                  {!!Object.keys(errors).length || (
                    <span className="error-text">
                      {(!!values.address && touched.address && errors.address) ||
                        (!!values.amount && touched.amount && errors.amount) ||
                        (parseFloat(values.amount) === balance &&
                          __('Decrease amount to account for transaction fee')) ||
                        (parseFloat(values.amount) > balance && __('Not enough credits'))}
                    </span>
                  )}
                </div>
              </Form>
            )}
          />
        }
      />
    );
  }
}

export default WalletSend;