/*
 * This file is part of ORY Editor.
 *
 * ORY Editor is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ORY Editor is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with ORY Editor.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @license LGPL-3.0
 * @copyright 2016-2018 Aeneas Rekkas
 * @author Aeneas Rekkas <aeneas+oss@aeneas.io>
 *
 */

import * as React from 'react';
import { Provider } from 'react-redux';

import dragDropContext from '../DragDropContext';
import HotKeyDecorator from '../HotKey/Decorator';
import { editable } from '../../selector/editable';
import Inner from './Inner';

import { EditorState } from '../../types/editor';
import Editor from '../../';

export type PropTypes = {
  id: string;
  editor: Editor;
  onChange?: Function;
};

class Editable extends React.PureComponent<PropTypes> {
  unsubscribe: Function;
  previousState: EditorState = {};
  DragDropContext: React.ComponentClass;

  constructor(props: PropTypes) {
    super(props);
    this.DragDropContext = dragDropContext(props.editor.dragDropContext);
  }

  componentDidMount() {
    if (!this.props.id) {
      throw new Error('The state must have an unique id');
    }

    this.unsubscribe = this.props.editor.store.subscribe(this.onChange);
    this.previousState = null;
  }

  componentWillUnmount() {
    this.unsubscribe();
  }

  onChange = () => {
    const { onChange } = this.props;
    if (typeof onChange !== 'function') {
      return;
    }

    const state: EditorState = editable(this.props.editor.store.getState(), {
      id: this.props.id,
    });
    if (state === this.previousState || !state) {
      return;
    }

    const serialized = this.props.editor.plugins.serialize(state);
    onChange(serialized);
  }

  render() {
    const {
      id,
      editor: { store, defaultPlugin },
    } = this.props;
    const DragDropContext = this.DragDropContext;

    return (
      <Provider store={store}>
        <DragDropContext>
          <HotKeyDecorator id={id}>
            <Inner id={id} defaultPlugin={defaultPlugin} />
          </HotKeyDecorator>
        </DragDropContext>
      </Provider>
    );
  }
}

export default Editable;