/**
 * (c) 2010-2018 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */

'use strict';

import H from './Globals.js';
import './Utilities.js';
import './Pointer.js';

var addEvent = H.addEvent,
    charts = H.charts,
    css = H.css,
    doc = H.doc,
    extend = H.extend,
    hasTouch = H.hasTouch,
    noop = H.noop,
    Pointer = H.Pointer,
    removeEvent = H.removeEvent,
    win = H.win,
    wrap = H.wrap;

if (!hasTouch && (win.PointerEvent || win.MSPointerEvent)) {

    // The touches object keeps track of the points being touched at all times
    var touches = {},
        hasPointerEvent = !!win.PointerEvent,
        getWebkitTouches = function () {
            var fake = [];
            fake.item = function (i) {
                return this[i];
            };
            H.objectEach(touches, function (touch) {
                fake.push({
                    pageX: touch.pageX,
                    pageY: touch.pageY,
                    target: touch.target
                });
            });
            return fake;
        },
        translateMSPointer = function (e, method, wktype, func) {
            var p;
            if (
                (
                    e.pointerType === 'touch' ||
                    e.pointerType === e.MSPOINTER_TYPE_TOUCH
                ) && charts[H.hoverChartIndex]
            ) {
                func(e);
                p = charts[H.hoverChartIndex].pointer;
                p[method]({
                    type: wktype,
                    target: e.currentTarget,
                    preventDefault: noop,
                    touches: getWebkitTouches()
                });
            }
        };

    // Extend the Pointer prototype with methods for each event handler and more
    extend(Pointer.prototype, /** @lends Pointer.prototype */ {

        /**
         * @private
         * @function Highcharts.Pointer#onContainerPointerDown
         *
         * @param {Highcharts.PointerEventObject} e
         */
        onContainerPointerDown: function (e) {
            translateMSPointer(
                e,
                'onContainerTouchStart',
                'touchstart',
                function (e) {
                    touches[e.pointerId] = {
                        pageX: e.pageX,
                        pageY: e.pageY,
                        target: e.currentTarget
                    };
                }
            );
        },

        /**
         * @private
         * @function Highcharts.Pointer#onContainerPointerMove
         *
         * @param {Highcharts.PointerEventObject} e
         */
        onContainerPointerMove: function (e) {
            translateMSPointer(
                e,
                'onContainerTouchMove',
                'touchmove',
                function (e) {
                    touches[e.pointerId] = { pageX: e.pageX, pageY: e.pageY };
                    if (!touches[e.pointerId].target) {
                        touches[e.pointerId].target = e.currentTarget;
                    }
                }
            );
        },

        /**
         * @private
         * @function Highcharts.Pointer#onDocumentPointerUp
         *
         * @param {Highcharts.PointerEventObject} e
         */
        onDocumentPointerUp: function (e) {
            translateMSPointer(
                e,
                'onDocumentTouchEnd',
                'touchend',
                function (e) {
                    delete touches[e.pointerId];
                }
            );
        },

        /**
         * Add or remove the MS Pointer specific events
         *
         * @private
         * @function Highcharts.Pointer#batchMSEvents
         *
         * @param {Function} fn
         */
        batchMSEvents: function (fn) {
            fn(
                this.chart.container,
                hasPointerEvent ? 'pointerdown' : 'MSPointerDown',
                this.onContainerPointerDown
            );
            fn(
                this.chart.container,
                hasPointerEvent ? 'pointermove' : 'MSPointerMove',
                this.onContainerPointerMove
            );
            fn(
                doc,
                hasPointerEvent ? 'pointerup' : 'MSPointerUp',
                this.onDocumentPointerUp
            );
        }
    });

    // Disable default IE actions for pinch and such on chart element
    wrap(Pointer.prototype, 'init', function (proceed, chart, options) {
        proceed.call(this, chart, options);
        if (this.hasZoom) { // #4014
            css(chart.container, {
                '-ms-touch-action': 'none',
                'touch-action': 'none'
            });
        }
    });

    // Add IE specific touch events to chart
    wrap(Pointer.prototype, 'setDOMEvents', function (proceed) {
        proceed.apply(this);
        if (this.hasZoom || this.followTouchMove) {
            this.batchMSEvents(addEvent);
        }
    });
    // Destroy MS events also
    wrap(Pointer.prototype, 'destroy', function (proceed) {
        this.batchMSEvents(removeEvent);
        proceed.call(this);
    });
}