import React from 'react';
import { defineMessages, useIntl } from 'react-intl';

import { changeEmail } from '@/actions/security';
import Button from '@/components/ui/button';
import Column from '@/components/ui/column';
import Form from '@/components/ui/form';
import FormActions from '@/components/ui/form-actions';
import FormGroup from '@/components/ui/form-group';
import Input from '@/components/ui/input';
import { useAppDispatch } from '@/hooks/use-app-dispatch';
import toast from '@/toast';

const messages = defineMessages({
  header: { id: 'column.change_email', defaultMessage: 'Change email' },
  updateEmailSuccess: {
    id: 'security.update_email.success',
    defaultMessage: 'Email successfully updated.',
  },
  updateEmailFail: { id: 'security.update_email.fail', defaultMessage: 'Update email failed.' },
  emailFieldLabel: { id: 'security.fields.email.label', defaultMessage: 'Email address' },
  emailFieldPlaceholder: { id: 'edit_email.placeholder', defaultMessage: 'me@example.com' },
  passwordFieldLabel: { id: 'security.fields.password.label', defaultMessage: 'Password' },
  submit: { id: 'security.submit', defaultMessage: 'Save changes' },
  cancel: { id: 'common.cancel', defaultMessage: 'Cancel' },
});

const initialState = { email: '', password: '' };

const EditEmailPage = () => {
  const intl = useIntl();
  const dispatch = useAppDispatch();

  const [state, setState] = React.useState(initialState);
  const [isLoading, setLoading] = React.useState(false);

  const { email, password } = state;

  const handleInputChange: React.ChangeEventHandler<HTMLInputElement> = React.useCallback(
    (event) => {
      event.persist();

      setState((prevState) => ({ ...prevState, [event.target.name]: event.target.value }));
    },
    [],
  );

  const handleSubmit = React.useCallback(() => {
    setLoading(true);
    dispatch(changeEmail(email, password))
      .then(() => {
        setState(initialState);
        toast.success(intl.formatMessage(messages.updateEmailSuccess));
      })
      .finally(() => {
        setLoading(false);
      })
      .catch(() => {
        setState((prevState) => ({ ...prevState, password: '' }));
        toast.error(intl.formatMessage(messages.updateEmailFail));
      });
  }, [email, password, dispatch, intl]);

  return (
    <Column label={intl.formatMessage(messages.header)} backHref='/settings'>
      <Form onSubmit={handleSubmit}>
        <FormGroup labelText={intl.formatMessage(messages.emailFieldLabel)}>
          <Input
            type='text'
            placeholder={intl.formatMessage(messages.emailFieldPlaceholder)}
            name='email'
            autoComplete='off'
            onChange={handleInputChange}
            value={email}
          />
        </FormGroup>

        <FormGroup labelText={intl.formatMessage(messages.passwordFieldLabel)}>
          <Input type='password' name='password' onChange={handleInputChange} value={password} />
        </FormGroup>

        <FormActions>
          <Button to='/settings' theme='tertiary'>
            {intl.formatMessage(messages.cancel)}
          </Button>
          <Button type='submit' theme='primary' disabled={isLoading}>
            {intl.formatMessage(messages.submit)}
          </Button>
        </FormActions>
      </Form>
    </Column>
  );
};

export { EditEmailPage as default };
