(function (window) {
    'use strict';
    
    var glasseson = window.glasseson;
    
    glasseson.sdkWrapper = new function() {
        
        var results = {
            prescription: null,
            status: 'incomplete',
            success: false
        };
    
        var bindListener = new function() {
            
            var copyGlassListeners = {
                sendSmsListeners : {
                    onSuccess : function() {},
                    onError : function() {}
                },
                prescriptionListeners : {
                    onPresciptionReady : function() {},
                    onClose : function () {},
                    update: function(){},
                    onError: function(){},
                    onStageChange: function(){},
                }
            };
            
            window.addEventListener('message', function(event) {
                var origin = event.origin || event.originalEvent.origin; // For Chrome, the origin property is in the event.originalEvent object.
                
                if (origin !== glasseson.origin)  // TODO  : Should be rendered from the server
                    return;
                    
                var result = JSON.parse(event.data);
                
                var stringifyPrescirptionField = function(field, points) {
                    if (field == "-") {
                        return field;
                    }
                    
                    var f = parseFloat(field);
                    
                    if (f == 0) {
                        return f.toFixed(points).toString();
                    }
                    
                    var v = f.toFixed(points).toString();
                    
                    return (v.indexOf("-") == 0 ? v : ("+" + v));
                };
                
                switch (result.type) {
                    case 'sms':
                        if (result.data.error == null) {
                            copyGlassListeners.sendSmsListeners.onSuccess();
                        }
                        else {
                            results.status = 'ERROR';
                            copyGlassListeners.sendSmsListeners.onError(results);
                        }
                        break;
                    case 'copy-glass.prescription-ready': // complete
                            results.status = 'complete';
                            results.success = true;
                            
                            var prescription = result.data.prescription;
                            
                            prescription.l_sph = stringifyPrescirptionField(prescription.l_sph, 2);
                            prescription.r_sph = stringifyPrescirptionField(prescription.r_sph, 2);
                            prescription.l_cyl = stringifyPrescirptionField(prescription.l_cyl, 2);
                            prescription.r_cyl = stringifyPrescirptionField(prescription.r_cyl, 2);
                            prescription.l_axis = prescription.l_axis.toString();
                            prescription.r_axis = prescription.r_axis.toString();
                            prescription.pd = parseFloat(prescription.pd).toFixed(1).toString();
                            prescription.error_msg = prescription.error_msg;
                            prescription.error_type = prescription.error_type;
                            prescription.error_title = prescription.error_title;
                            prescription.note = prescription.note;
                            
                            copyGlassListeners.prescriptionListeners.update(prescription);
                    
                            copyGlassListeners.prescriptionListeners.onPresciptionReady(results);
                        break;
                   case 'close-copy-glass':
                        copyGlassListeners.prescriptionListeners.onClose();
                        break;
                   case 'copy-glass.prescription-incomplete': // incomplete
                        if (result.data.prescription != null) {
                            var prescription = result.data.prescription;
                            
                            prescription.l_sph = stringifyPrescirptionField(prescription.l_sph, 2);
                            prescription.r_sph = stringifyPrescirptionField(prescription.r_sph, 2);
                            prescription.l_cyl = stringifyPrescirptionField(prescription.l_cyl, 2);
                            prescription.r_cyl = stringifyPrescirptionField(prescription.r_cyl, 2);
                            prescription.l_axis = prescription.l_axis.toString();
                            prescription.r_axis = prescription.r_axis.toString();
                            prescription.pd = parseFloat(prescription.pd).toFixed(1).toString();
                            prescription.error_msg = prescription.error_msg;
                            prescription.error_type = prescription.error_type;
                            prescription.error_title = prescription.error_title;
                            prescription.note = prescription.note;
                            
                            copyGlassListeners.prescriptionListeners.update(prescription);
                            
                            if (prescription.error === true) {
                                results.status = 'ERROR';
                                copyGlassListeners.prescriptionListeners.onError(results);
                            } else {
                                copyGlassListeners.prescriptionListeners.onStageChange({stage:'onIncompletePrescription'});
                            }
                        }
                        break;
                    case 'copy-glass.stage-change':
                        copyGlassListeners.prescriptionListeners.onStageChange(result.data);
                        break;
                }
            }, false);  
            
            
            var bindSendSmsListeners = function(listeners) {
                copyGlassListeners.sendSmsListeners = listeners;  // We might need to use this here
            };
            
            var bindPrescriptionListeners = function(listeners) {
                copyGlassListeners.prescriptionListeners = listeners;
            };
            
            return {
                bindSendSmsListeners : bindSendSmsListeners,
                bindPrescriptionListeners : bindPrescriptionListeners,
                listeners : copyGlassListeners
            };
        };
        
        var _isInitialized = false;
        var wrapper;
        
        var init = function(clientId) {
            wrapper = document.createElement("iframe");
            wrapper.style.position = 'absolute';
            wrapper.style.left = 0;
            wrapper.style.top = 0;
            wrapper.style.display = 'none';
            wrapper.onreadystatechange = function () {
                if (wrapper.readyState !== 'complete') {
                    return;
                }
            };
            
            wrapper.onload = function() {
                _isInitialized = true;
                
                // Once the SDK have been loaded (the iframe) we need to execute other method that have been called during initialization
                for (var i in glasseson._q || []) {
                    var args = glasseson._q[i];
                    var params = [].slice.call(args);
                    var method = params.shift();
                    
                    if (method !== 'init') {
                        glasseson[method].apply(glasseson, [].slice.call(params[0]));
                    }
                }
            };
            
            wrapper.src = glasseson.origin + '/sdk/wrapper/' + glasseson.clientId + '/' + document.domain;
            
            document.body.appendChild(wrapper);
        };
        
        var sendSms = function(phoneNumber, onSuccess, onError) {
            bindListener.bindSendSmsListeners({
                onSuccess : onSuccess,
                onError : onError
            });
            
            wrapper.contentWindow.postMessage(JSON.stringify({
                type: 'sms',
                data: {
                    phoneNumber: phoneNumber
                }
            }), glasseson.origin);
        };
        
        var highestZindex = function () {
            var highestZ;
            var lowestZ;
            var onefound = false;
            var divs = document.getElementsByTagName('*');
            if( ! divs.length ) { return Array(highestZ,lowestZ); }
            for( var i=0; i<divs.length; i++ ) {
                if( divs[i].style.position && divs[i].style.zIndex ) {
                    if( ! onefound ) { 
                        highestZ = lowestZ = parseInt(divs[i].style.zIndex);
                        onefound = true;
                    }
                    else {
                        var ii = parseInt(divs[i].style.zIndex);
                        if( ii > highestZ ) { highestZ = ii; }
                        if( ii < lowestZ ) { lowestZ = ii; }
                    }
                }
            }
            return highestZ;
        };
        
        var close = function(callback) {
            document.body.removeChild(glasseson.node);
                    
            document.body.style.margin = glasseson.body.margin;
            document.body.style.padding = glasseson.body.padding;
            document.body.style.overflow = glasseson.body.overflow;
            document.body.style.scrollTop = glasseson.body.scrollTop;
            document.body.style.position = glasseson.body.position;
        
            if (callback != null) {
                callback();
            }
        };
        
        var startSession = function(onload, onfinish, onStageChange, options) {
            
            // TODO : If the user will call send sms after starting a session
            
            var node = document.createElement("iframe");
            node.frameBorder = 0;
            node.marginwidth = '0';
            node.marginheight = '0';
            node.hspace = '0';
            node.vspace = '0';
            node.scrolling = 'no';
            node.style.position = 'fixed';
            node.style.left = 0;
            node.style.top = 0;
            node.style.width = '100%';
            node.style.height = '100vh';
            node.style.overflow = 'hidden';
            node.style.zIndex = 999; 
            node.width = '100%';
            node.height = '100%';
            node.setAttribute("allowfullscreen", "true");
            node.onreadystatechange = function () {
                if (node.readyState !== 'complete') {
                    return;
                }
            };
            node.onload = function() {
                // Persiste the previous body style
                glasseson.body  = {
                    margin : document.body.style.margin,
                    padding : document.body.style.padding,
                    overflow : document.body.style.overflow,
                    scrollTop: document.body.style.scrollTop,
                    position: document.body.style.position
                };
                
                document.body.style.margin = '0';
                document.body.style.padding = '0';
                document.body.style.overflow = 'hidden';
                document.body.scrollTop = '0';
                document.body.style.position = 'relative';
                
                onload();
            };
            
            node.src = glasseson.origin + '/copy-glass?client_id=' + glasseson.clientId + '&client_domain=' + document.domain + '&skipSms=' + glasseson.smsWasSent;
            
            glasseson.node = node;
            
            bindListener.bindPrescriptionListeners({
                onPresciptionReady : onfinish,
                onClose : function() {
                    close(function() {
                        onfinish(results);
                    });
                },
                update: function(prescription){
                    if (prescription) {
                        results.prescription = prescription
                    }
                },
                onError: onfinish,
                onStageChange: onStageChange
            });
            
            document.body.appendChild(node); 
        };
        
        return {
            init : init,
            sendSms : sendSms,
            startSession: startSession,
            close: close,
            isInitialized : function() {
                return _isInitialized;
            }
        };
    };
    
    glasseson.smsWasSent = false;
    glasseson.started = false;
    glasseson.sendSms = function(phoneNumber, onSuccess, onError) {
        
        // We can't execute the send SMS before the sdkWrapper is ready
        if (glasseson.sdkWrapper.isInitialized()) {
            glasseson.sdkWrapper.sendSms(phoneNumber, function() {glasseson.smsWasSent = true; onSuccess(); }, onError);
        }
        else {
            // Once ready we will travers the queue
            glasseson._q.push(['sendSms', arguments]);
        }
        
    };
    
    glasseson.init = function(clientId) {
        if (glasseson.clientId != null) {
            console.error('You have called glasseson.init more than once.');
            return;
        }
        
        glasseson.clientId = clientId;
        
        glasseson.sdkWrapper.init(clientId);
    };
    
    // Start the glasseson flow
    // Open an iframe
    glasseson.start = function(onload, onfinish, onStageChange, options) {
        if (glasseson.started == true) {
            console.error('You have called glasseson.start more than once.');
            return;
        }
        glasseson.started = true;
        
        glasseson.sdkWrapper.startSession(onload, function(args){
            glasseson.started = false;
            
            onfinish.apply(this, arguments);
        }, onStageChange, options);
        
    };
    
    // Close the iframe
    glasseson.close = function() {
        glasseson.started = false;
        glasseson.sdkWrapper.close();
    }

// If the user tried to execute a method before the sdk have been downloaded
// The first method that the user should execute should be init but if our users didn't use the SDK
// as needed we will travers the queue for the init method and execute it first
// Inside the sdkWrapper.init we load the rest of the methods after they have been loaded
for (var i in glasseson._q || []) {
    var args = glasseson._q[i];
    var params = [].slice.call(args);
    var method = params.shift();

    if (method === 'init') {
        glasseson[method].apply(glasseson, [].slice.call(params[0]));
    }
}
}(window));