/**
 * @class Keyboard
 * @classdesc Сlass to handle the keystrokes
 *
 * @module Keyboard
 *
 * @author CodeX Team (team@ifmo.su)
 * @copyright CodeX Team 2017
 * @license The MIT License (MIT)
 * @version 2.0.0
 */

/**
 * @typedef {Keyboard} Keyboard
 */
export default class Keyboard extends Module {

    /**
     * @constructor
     */
    constructor({config}) {

        super({config});

    }

    /**
     * Handler on Editor for keyboard keys at keydown event
     *
     * @param {KeyboardEvent} event
     */
    keyboardListener(event) {

        switch(event.keyCode) {

            case _.keyCodes.BACKSPACE:

                _.log('Backspace key pressed');
                break;

            case _.keyCodes.ENTER:

                _.log('Enter key pressed');
                this.enterPressed(event);
                break;

            case _.keyCodes.DOWN:
            case _.keyCodes.RIGHT:

                _.log('Right/Down key pressed');
                this.arrowRightAndDownPressed();
                break;

            case _.keyCodes.UP:
            case _.keyCodes.LEFT:

                _.log('Left/Up key pressed');
                this.arrowLeftAndUpPressed();
                break;

            default:

                break;

        }

    }

    /**
     * Handle pressing enter key
     *
     * @param {KeyboardEvent} event
     */
    enterPressed(event) {

        /**
         * @todo check settings of "allowLinebreaks" plugin
         */
        event.preventDefault();
        /**
         * Insert new block with data below current block
         */
        this.Editor.BlockManager.split();

    }

    /**
     * Handle right and down keyboard keys
     */
    arrowRightAndDownPressed() {

        this.Editor.BlockManager.navigateNext();

    }

    /**
     * Handle left and up keyboard keys
     */
    arrowLeftAndUpPressed() {

        this.Editor.BlockManager.navigatePrevious();

    }

}