import Eventful from 'zrender/src/mixin/Eventful';
import { keyboardEvents } from './constant/keyboardEvents';

class KeyboardController extends Eventful {
    constructor(iscs) {
        super();
        this.$iscs = iscs;
        this.$zr = iscs.getZr();
        this.events = iscs.getEvents();
        this.initData();
        this.initHandler(this.$zr);
    }

    initHandler(zr) {
        if (zr) {
            var keydownHandle = this.keydown.bind(this);

            this.enable = function (opts) {
                opts = opts || {};
                this._keyOnDownUp = opts.keyOnDownUp || true;

                window.addEventListener('keyup', keydownHandle, false);
            };

            this.disable = function () {
                window.removeEventListener('keyup', keydownHandle, false);
            };

            this.dispose = function() {
                this.disable();
            };
        }
    }

    initData() {

    }

    keydown(e) {
        if (this._keyOnDownUp && !e.repeat) {
            const currentEvent = keyboardEvents[e.key.toUpperCase()];
            let str = '';
            if (currentEvent && currentEvent.altKey === e.altKey && currentEvent.ctrlKey === e.ctrlKey && currentEvent.shiftKey === e.shiftKey) {
                str = currentEvent.event;
            }
            this.trigger(this.events.Keyboard, str);
        }
    }
}

export default KeyboardController;