/*
 *
 * Copyright (c) 2014-2017 Daniele Lenares (https://github.com/dnlnrs)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * Version 1.1.3
 *
 */
(function ($) {

    'use strict';

    /**
     * Animate the input object
     *
     * @param $obj
     * @param type
     * @param animation
     */
    function do_animation($obj, type, animation) {
        if (type === 'show') {
            switch (animation) {
                case 'fade':
                    $obj.fadeIn();
                    break;

                case 'slide':
                    $obj.slideDown();
                    break;

                default:
                    $obj.fadeIn();
            }
        } else {
            switch (animation) {
                case 'fade':
                    $obj.fadeOut();
                    break;

                case 'slide':
                    $obj.slideUp();
                    break;

                default:
                    $obj.fadeOut();
            }
        }
    }

    /**
     * Bind click event
     *
     * @param $obj
     * @param speed
     */
    function click_event($obj, speed) {
        var not_clicked = true;
        $obj.on('click', function () {
            if (not_clicked === true) {
                not_clicked = false;
                $('html, body').animate({scrollTop: 0}, speed, function () {
                    not_clicked = true;
                });
            }
        });
    }


    $.goup = function (user_params) {

        /* Default Params */
        var params = $.extend({
            location: 'right',
            locationOffset: 10,
            bottomOffset: 10,
            containerSize: 26,
            containerRadius: 50,
            containerClass: 'goup-container',
            arrowClass: 'goup-arrow',
            alwaysVisible: false,
            trigger: 10,
            entryAnimation: 'fade',
            goupSpeed: 'slow',
            hideUnderWidth: 0,
            containerColor: '#405353',
            arrowColor: '#fff',
            title: '',
            titleAsText: false,
            titleAsTextClass: 'goup-text',
            zIndex: 1
        }, user_params);
        /* */

        /* Parameters check */
        if (params.location !== 'right' && params.location !== 'left') {
            params.location = 'right';
        }

        if (params.locationOffset < 0) {
            params.locationOffset = 0;
        }

        if (params.bottomOffset < 0) {
            params.bottomOffset = 0;
        }

        if (params.containerSize < 20) {
            params.containerSize = 20;
        }

        if (params.containerRadius < 0) {
            params.containerRadius = 0;
        }

        if (params.trigger < 0) {
            params.trigger = 0;
        }

        if (params.hideUnderWidth < 0) {
            params.hideUnderWidth = 0;
        }

        var checkColor = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i;
        if (!checkColor.test(params.containerColor)) {
            params.containerColor = '#000';
        }
        if (!checkColor.test(params.arrowColor)) {
            params.arrowColor = '#fff';
        }

        if (params.title === '') {
            params.titleAsText = false;
        }

        if (isNaN(params.zIndex)) {
            params.zIndex = 1;
        }
        /* */

        /* Create required elements */
        var $body = $('body');
        var $window = $(window);

        var $container = $('<div>');
        $container.addClass(params.containerClass);
        var $arrow = $('<div>');
        $arrow.addClass(params.arrowClass);

        $container.html($arrow);

        $body.append($container);


        /* Container Style */
        var containerStyle = {
            position: 'fixed',
            width: params.containerSize,
            height: params.containerSize,
            background: params.containerColor,
            cursor: 'pointer',
            display: 'none',
            'z-index': params.zIndex
        };
        containerStyle['bottom'] = params.bottomOffset;
        containerStyle[params.location] = params.locationOffset;
        containerStyle['border-radius'] = params.containerRadius;

        $container.css(containerStyle);

        if (!params.titleAsText) {
            $container.attr('title', params.title);
        } else {
            var $textContainer = $('<div>');
            $body.append($textContainer);
            $textContainer.addClass(params.titleAsTextClass).text(params.title);
            $textContainer.attr('style', $container.attr('style'));
            $textContainer.css('background', 'transparent')
                .css('width', params.containerSize + 40)
                .css('height', 'auto')
                .css('text-align', 'center')
                .css(params.location, params.locationOffset - 20);
            var textContainerHeight = parseInt($textContainer.height()) + 10;
            var containerBottom = parseInt($container.css('bottom'));
            var containerNewBottom = textContainerHeight + containerBottom;
            $container.css('bottom', containerNewBottom);
        }


        /* Arrow Style */
        var borderSize = 0.25 * params.containerSize;
        var arrowStyle = {
            width: 0,
            height: 0,
            margin: '0 auto',
            'padding-top': Math.ceil(0.325 * params.containerSize),
            'border-style': 'solid',
            'border-width': '0 ' + borderSize + 'px ' + borderSize + 'px ' + borderSize + 'px',
            'border-color': 'transparent transparent ' + params.arrowColor + ' transparent'
        };
        $arrow.css(arrowStyle);
        /* */


        /* params.trigger Hide under a certain width */
        var isHidden = false;
        $window.resize(function () {
            if ($window.outerWidth() <= params.hideUnderWidth) {
                isHidden = true;
                do_animation($container, 'hide', params.entryAnimation);
                if (typeof($textContainer) !== 'undefined') {
                    do_animation($textContainer, 'hide', params.entryAnimation);
                }
            } else {
                isHidden = false;
                $window.trigger('scroll');
            }
        });
        /* If i load the page under a certain width, i don't have the event 'resize' */
        if ($window.outerWidth() <= params.hideUnderWidth) {
            isHidden = true;
            $container.hide();
            if (typeof($textContainer) !== 'undefined')
                $textContainer.hide();
        }


        /* params.trigger show event */
        if (!params.alwaysVisible) {
            $window.scroll(function () {
                if ($window.scrollTop() >= params.trigger && !isHidden) {
                    do_animation($container, 'show', params.entryAnimation);
                    if (typeof($textContainer) !== 'undefined') {
                        do_animation($textContainer, 'show', params.entryAnimation);
                    }
                }

                if ($window.scrollTop() < params.trigger && !isHidden) {
                    do_animation($container, 'hide', params.entryAnimation);
                    if (typeof($textContainer) !== 'undefined') {
                        do_animation($textContainer, 'hide', params.entryAnimation);
                    }
                }
            });
        } else {
            do_animation($container, 'show', params.entryAnimation);
            if (typeof($textContainer) !== 'undefined') {
                do_animation($textContainer, 'show', params.entryAnimation);
            }
        }
        /* If i load the page and the scroll is over the trigger, i don't have immediately the event 'scroll' */
        if ($window.scrollTop() >= params.trigger && !isHidden) {
            do_animation($container, 'show', params.entryAnimation);
            if (typeof($textContainer) !== 'undefined') {
                do_animation($textContainer, 'show', params.entryAnimation);
            }
        }

        click_event($container, params.goupSpeed);
        if (typeof($textContainer) !== 'undefined') {
            click_event($textContainer, params.goupSpeed);
        }
    };
}(jQuery));