import React from 'react';
import { Field, reduxForm } from 'redux-form';
import { AutoComplete, FlatButton } from 'material-ui';

// Component

const mapError = (
  {
    meta: { touched, error, warning } = {},
    input,
    ...props
  },
  errorProp = 'errorText',
) =>
  (touched && (error || warning)
    ? {
      ...props,
      ...input,
      [errorProp]: error || warning,
    }
    : { ...input, ...props });

class SelectAutoComplete extends React.Component {

  constructor(props) {
    super(props);
    const searchText = props.input.value;
    this.state = { searchText };
  }

  onUpdateInput = (searchText) => {
    const { input } = this.props;
    const { onChange } = input;
    this.setState({ searchText }, () => {
      onChange(this.getSelectedIndex());
    });
  }

  getSelectedIndex = () => {
    const { dataSource, dataSourceConfig, filter } = this.props;
    const searchText = this.state.searchText;
    const selectedIndex = dataSource.findIndex((item, index) => {
      switch (typeof item) {
        case 'string':
          return searchText === item;
        case 'object':
          if (item && typeof item[dataSourceConfig.text] === 'string') {
            const itemText = item[dataSourceConfig.text];
            return searchText === itemText;
          }
          break;
        default: // Do nothing
      }
      return false;
    });
    return selectedIndex;
  }

  render() {
    const { input, onUpdateInput } = this.props;
    const { onChange, onBlur } = input;
    return (
      <AutoComplete
        { ...mapError(this.props) }
        searchText={ this.state.searchText }
        onNewRequest={ (value, index) => onChange(index) }
        onBlur={ () => onBlur(this.getSelectedIndex()) }
        onChange={ this.onUpdateInput }
        onUpdateInput={ (searchText) => {
          this.onUpdateInput(searchText);
          if (onUpdateInput) {
            onUpdateInput(searchText);
          }
        } }
      />
    );
  }
}

// Real example

const mapFetchedItemsToAutoComplete = {
  value: 'id', text: 'name',
};

const UIForm = props => (
  <form
    onSubmit={ props.handleSubmit }
  >
    <Field
      name="field1"
      component={ SelectAutoComplete }
      dataSourceConfig={ mapFetchedItemsToAutoComplete }
      dataSource={ props.dataSource }
      openOnFocus
      filter={ AutoComplete.fuzzyFilter }
    />
    <FlatButton
      primary
      label="Submit"
      type="submit"
      style={ { marginLeft: 15 } }
    />
  </form>
);

const formValidator = (values) => {
  const errors = {};
  if (typeof values.field1 === 'undefined' || values.field1 === -1) {
    errors.field1 = 'None of the items has been selected';
  }
  return errors;
};

const Form = reduxForm({
  form: 'form1',
  validate: formValidator,
})(UIForm);

class Application extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      dataSource: [
        { id: 1, name: 'Solution' },
        { id: 2, name: 'Problem' },
        { id: 3, name: 'Fix' },
      ],
    };
  }

  componentWillMount() {
    const interval = setInterval(() => {
      if (this.state.dataSource.length > 10) {
        clearInterval(interval);
        return;
      }
      const id = this.state.dataSource.length + 1;
      this.setState({
        dataSource: [
          ...this.state.dataSource,
          { id, name: `Solution ${id}` },
        ],
      });
    }, 1000);

    setTimeout(() => {
      this.setState({
        dataSource: this.state.dataSource.filter(e => e.name !== 'Fix'),
      });
    }, 3000);
  }

  render() {
    return (
      <Form
        dataSource={ this.state.dataSource.sort((a, b) => a.name > b.name) }
        onSubmit={ (values) => alert(JSON.stringify(values, null, 2)) }
      />
    );
  }
}

export default () => (
  <Application />
);