'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

exports.default = goTo;

var _easingPatterns = require('./easing-patterns');

var easingPatterns = _interopRequireWildcard(_easingPatterns);

var _util = require('./util');

var _vue = require('vue');

var _vue2 = _interopRequireDefault(_vue);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function goTo(_target) {
    var _settings = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    var settings = _extends({
        container: document.scrollingElement || document.body || document.documentElement,
        duration: 500,
        offset: 0,
        easing: 'easeInOutCubic',
        appOffset: true
    }, _settings);
    var container = (0, _util.getContainer)(settings.container);
    if (settings.appOffset) {
        var isDrawer = container.classList.contains('v-navigation-drawer');
        var isClipped = container.classList.contains('v-navigation-drawer--clipped');
        settings.offset += _vue2.default.prototype.$vuetify.application.bar;
        if (!isDrawer || isClipped) settings.offset += _vue2.default.prototype.$vuetify.application.top;
    }
    var startTime = performance.now();
    var targetLocation = (0, _util.getOffset)(_target) - settings.offset;
    var startLocation = container.scrollTop;
    if (targetLocation === startLocation) return Promise.resolve(targetLocation);
    var ease = typeof settings.easing === 'function' ? settings.easing : easingPatterns[settings.easing];
    if (!ease) throw new TypeError('Easing function "' + settings.easing + '" not found.');
    // tslint:disable-next-line:promise-must-complete
    return new Promise(function (resolve) {
        return requestAnimationFrame(function step(currentTime) {
            var timeElapsed = currentTime - startTime;
            var progress = Math.abs(settings.duration ? Math.min(timeElapsed / settings.duration, 1) : 1);
            container.scrollTop = Math.floor(startLocation + (targetLocation - startLocation) * ease(progress));
            if (progress === 1 || container.clientHeight + container.scrollTop === container.scrollHeight) {
                return resolve(targetLocation);
            }
            requestAnimationFrame(step);
        });
    });
}
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