/****************************************************************************
 * Copyright 2017 EPAM Systems
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ***************************************************************************/

import { upperFirst } from 'lodash/fp';
import { h, Component } from 'preact';
/** @jsx h */

import Editor from '../../editor'

function setupEditor(editor, props, oldProps = {}) {
	const { struct, tool, toolOpts, options } = props;

	if (struct !== oldProps.struct)
		editor.struct(struct);

	if (tool !== oldProps.tool || toolOpts !== oldProps.toolOpts)
		editor.tool(tool, toolOpts);

	if (oldProps.options && options !== oldProps.options)
		editor.options(options);

	// update handlers
	for (let name in editor.event) {
		if (!editor.event.hasOwnProperty(name))
			continue;

		let eventName = `on${upperFirst(name)}`;

		if (props[eventName] !== oldProps[eventName]) {
			console.info('update editor handler', eventName);
			if (oldProps[eventName])
				editor.event[name].remove(oldProps[eventName]);

			if (props[eventName])
				editor.event[name].add(props[eventName]);
		}
	}
}

class StructEditor extends Component {
	shouldComponentUpdate() {
		return false;
	}

	componentWillReceiveProps(props) {
		setupEditor(this.instance, props, this.props);
	}

	componentDidMount() {
		console.assert(this.base, "No backing element");
		this.instance = new Editor(this.base, { ...this.props.options });
		setupEditor(this.instance, this.props);
		if (this.props.onInit)
			this.props.onInit(this.instance);
	}

	render () {
		let { Tag="div", struct, tool, toolOpts, options, ...props } = this.props;
		return (
			<Tag onMouseDown={ev => ev.preventDefault()} {...props}	/>
		);
	}
}

export default StructEditor;