//==============================================================================
//
//  Inserts the chat widget into a web page
//
//==============================================================================

(function()
{
    /*!
     * contentloaded.js
     *
     * Author: Diego Perini (diego.perini at gmail.com)
     * Summary: cross-browser wrapper for DOMContentLoaded
     * Updated: 20101020
     * License: MIT
     * Version: 1.2
     *
     * URL:
     * http://javascript.nwbox.com/ContentLoaded/
     * http://javascript.nwbox.com/ContentLoaded/MIT-LICENSE
     *
     */
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    // Utils
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    /*! jQuery v@1.8.0 -deprecated,-ajax,-ajax/jsonp,-ajax/script,-ajax/xhr jquery.com | jquery.org/license */
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    var $ = window.__jq2;

    // -----

    var MOBILE_URL = 'https://livechat.usalizate.com/livechat/php/app.php?widget-mobile';

    var state;

    // Initialize API

    var iframe, messageNamespace = 'mcs_' + Math.floor(new Date().getTime() * Math.random()) + '_';

    function postToWidget(data)
    {
        iframe && iframe.contentWindow.postMessage(messageNamespace + data, '*');
    }

    var api = window.phpLiveChat = {

        show : function()
        {
            if(state === 'mobile')
            {
                window.location = MOBILE_URL;
            }

            postToWidget('api.show');
        },

        hide : function()
        {
            postToWidget('api.hide');
        },

        fullscreenOn : function()
        {
            postToWidget('api.fullscreenOn');
        },

        fullscreenOff : function()
        {
            postToWidget('api.fullscreenOff');
        },

        endChat : function()
        {
            postToWidget('api.endChat');
        },

        sendMessage : function(body)
        {
            postToWidget('api.sendMessage:' + body);
        }
    };

    var inline = false,
        src    = 'https://livechat.usalizate.com/livechat/php/app.php?widget-iframe-content';

    // Create inline iframe

    if(inline)
    {
        document.write('<iframe id="customer-chat-iframe" ></iframe>');

        iframe = document.getElementById('customer-chat-iframe');
    }

    // -----

    var ANIMATION_TIME = 400;

    contentLoaded(window, function()
    {
        iframe = iframe || document.createElement('iframe');

        var HEADER_HEIGHT      = 5;
        var MOBILE_BREAKPOINT  = 550;
        var MOBILE_BUTTON_SIZE = 55;
        var WIDGET_SIDE        = 'right';

        iframe.id               = 'customer-chat-iframe';
        iframe.name             = messageNamespace;
        iframe.src              = src;
        iframe.border           = 0;
        iframe.marginwidth      = 0;
        iframe.marginWidth      = 0;
        iframe.marginheight     = 0;
        iframe.marginHeight     = 0;
        iframe.frameBorder      = 0;
        iframe.outline          = 'none';
        iframe.style.background = 'transparent';
        iframe.style.border     = 'none';
        iframe.style.outline    = 'none';
        iframe.setAttribute('allowfullscreen', '');

        if(!inline)
        {
            iframe.style.position     = 'fixed';
            iframe.style.display      = 'none';
            iframe.style.zIndex       = 1000;
            iframe.style.bottom       = -(400 - HEADER_HEIGHT) + 'px';
            iframe.style[WIDGET_SIDE] = '50px';
        }

        iframe.style.overflow   = 'hidden';
        iframe.style.minWidth   = '279px';
        iframe.style.minHeight  = '320px';
        iframe.style.width      = inline ? '100%' : '329px';
        iframe.style.height     = inline ? '100%' : '400px';
        iframe.style.marginRight    = '-50px';
                iframe.style.padding    = 0;

        // Responsiveness support

        var mobileStyles = {

            position  : 'fixed',
            width     : MOBILE_BUTTON_SIZE + 'px',
            height    : MOBILE_BUTTON_SIZE + 'px',
            minWidth  : 0,
            minHeight : 0,
            bottom    : 0
        };

        mobileStyles[WIDGET_SIDE] = 0;

        var originalStyles = {};

        addListener(iframe, 'load', function()
        {
            addListener(window, 'resize', updateState);
            addListener(window, 'scroll', positionWidget);
        });

        // Messaging

        addListener(window, 'message', handleCommunication);

        // -----

        if(!inline) document.body.appendChild(iframe);

        // -----

        // Helper functions

        var communicationReady = false;

        function handleCommunication(evt)
        {
            var data = evt.data;

            if(!data || data.indexOf(messageNamespace) !== 0) return;

            data = data.slice(messageNamespace.length);

            var valid     = true;
            var parts     = data.split('|');
            var type      = parts[0];
            var typeParts = type.split('.');
            var baseType  = typeParts[0];

            if(baseType == 'api')
            {
                var apiCall = typeParts[1];
                var fn      = api['on' + apiCall];

                if(typeof fn === 'function')
                {
                    fn();
                }
            }
            else switch(type)
            {
                default:
                    valid = false;
                break;

                case 'get.properties':
                    postToWidget('get.properties:' + [ iframe.style.width, iframe.style.height, iframe.style[WIDGET_SIDE] ].join(','));
                break;

                case 'fs.on':
                    postToWidget('get.properties:' + [ iframe.style.width, iframe.style.height, iframe.style[WIDGET_SIDE] ].join(','));
                break;

                case 'fs.off':
                    postToWidget('get.properties:' + [ iframe.style.width, iframe.style.height, iframe.style[WIDGET_SIDE] ].join(','));
                break;

                case 'animate':
                    if(state === 'mobile') return;

                    var props = {};
                    var propsArray = parts[1].split(',');

                    for(var i = 0; i < propsArray.length; i++)
                    {
                        var propParts = propsArray[i].split('=');

                        props[propParts[0]] = propParts[1];
                    }

                    $(iframe).animate(props, { duration : ANIMATION_TIME, queue : false });
                break;

                case 'css':
                    if(state === 'mobile') return;

                    var props = {};
                    var propsArray = parts[1].split(',');

                    for(var i = 0; i < propsArray.length; i++)
                    {
                        var propParts = propsArray[i].split('=');

                        props[propParts[0]] = propParts[1];
                    }

                    $(iframe).css(props);
                break;

                case 'show':
                    iframe.style.display = 'none';
                break;

                case 'hide':
                    iframe.style.display = 'none';
                break;
            }

            // Initial state update after the communication is bound

            if(valid && !communicationReady)
            {
                communicationReady = true;

                setTimeout(updateState, 1);
            }
        }

        function updateState()
        {
            if(inline) return;

            if     (state !== 'mobile'  && getWindowWidth() <  MOBILE_BREAKPOINT) setMobileState();
            else if(state !== 'desktop' && getWindowWidth() >= MOBILE_BREAKPOINT) setDesktopState();

            positionWidget();
        }

        function positionWidget()
        {
        }

        function setMobileState()
        {
            state = 'mobile';

            for(var key in mobileStyles) originalStyles[key] = iframe.style[key];
            for(var key in mobileStyles) iframe.style[key]   = mobileStyles[key];

            postToWidget('state.mobile');

            positionWidget();
        }

        function setDesktopState()
        {
            state = 'desktop';

            for(var key in originalStyles) iframe.style[key] = originalStyles[key];

            postToWidget('state.desktop');
        }
    });
})();