/*
 * jQuery wizard plug-in 2.0.1
 *
 *
 * Copyright (c) 2010 Jan Sundman (jan.sundman[at]aland.net)
 *
 * Licensed under the MIT licens:
 *   http://www.opensource.org/licenses/mit-license.php
 * 
 */
   
(function($){
    
  $.fn.formwizard = function(wizardSettings, validationSettings, formOptions){

    var form = $(this);
    var steps = form.find(".step");

    switch(arguments[0]){
        case "state":
            return getWizardState();
        case "reset":
            resetWizard();
            return $(this);
        case "show":
            (form[0].settings.historyEnabled)?$.historyLoad("_" + arguments[1].substr(arguments[1].indexOf("#") + 1)):show("_" + arguments[1].substr(arguments[1].indexOf("#") + 1));
            return $(this);
        case "destroy":
            destroy();
            return $(this);
        default:
            if(form[0].settings === undefined){
                initialize();
            }
    }

    function initialize(){
        var formOptionsSuccess = (formOptions)?formOptions.success:undefined;
        form[0].formSettings = $.extend(formOptions,{
        success    : function(data){ 
                if(formOptions && formOptions.resetForm || !formOptions){
                    resetWizard();
                }
                if(formOptionsSuccess){
                    formOptionsSuccess(data);
                }else{
                    //alert("success2");
                    window.location.href="anmeldung.php";
                }
            }
        });
    
        form[0].settings = $.extend({
            historyEnabled    : false,
            validationEnabled : false,
            formPluginEnabled : false,
            linkClass    : ".link",
            submitStepClass : "submit_step",
            back : ":reset",
            next : ":submit",
            textSubmit : 'Anmelden',
            textNext : 'Nächster Schritt',
            textBack : 'Zurück',
            afterNext: undefined,
            afterBack: undefined,
            serverSideValidationUrls : undefined,
            inAnimation : 'fadeIn',
            outAnimation : 'fadeOut',
            focusFirstInput : true,
            disableInputFields : true,
            showBackOnFirstStep : false
        }, wizardSettings);    
        
        form[0].activatedSteps = new Array();
        form[0].isLastStep = false;
        form[0].previousStep = undefined;
        form[0].currentStep = steps.eq(0).attr("id");    
        form[0].backButton    = form.find(form[0].settings.back);
        form[0].nextButton    = form.find(form[0].settings.next);    
        form[0].originalResetValue = form[0].backButton.val();
        form[0].originalSubmitValue = form[0].nextButton.val();

        if(form[0].settings.validationEnabled && jQuery().validate  == undefined){
            form[0].settings.validationEnabled = false;
            alert("the validation plugin needs to be included");
        }else if(form[0].settings.validationEnabled){
            form.validate(validationSettings);
        }
    
        if(form[0].settings.formPluginEnabled && jQuery().ajaxSubmit == undefined){
            form[0].settings.formPluginEnabled = false;
            alert("the form plugin needs to be included");
        }
        
        steps.hide();
        if(form[0].settings.disableInputFields == true){
            $(steps).find(":input").attr("disabled","disabled");
        }
        
        if(form[0].settings.historyEnabled && $.historyInit  == undefined){
            form[0].settings.historyEnabled = false;
            alert("the history plugin needs to be included");
        }else if(form[0].settings.historyEnabled){
            $.historyInit(show);
            $.historyLoad("_" + form[0].currentStep);
        }else{
            show(undefined);
        }
        form[0].initialized = true;
        form[0].backButton.val(form[0].settings.textBack);
        return $(this);
    }

    form[0].nextButton.click(function(){        
        if(form[0].settings.validationEnabled){
            if(!form.valid()){form.validate().focusInvalid();return false;}
        }
        if(form[0].isLastStep){ 
            for(var i = 0; i < form[0].activatedSteps.length; i++){
                steps.filter("#" + form[0].activatedSteps[i]).find(":input").removeAttr("disabled");
            }
            if(form[0].settings.formPluginEnabled){
                form[0].initialized = false;
                form.ajaxSubmit(form[0].formSettings);
                return false;
            }
            form.submit();
            return false;
        }

        if(form[0].settings.serverSideValidationUrls){
          var options = form[0].settings.serverSideValidationUrls[form[0].currentStep];
            if(options != undefined){ 
              var success = options.success;
                $.extend(options,{success: function(data, statusText){
                        if((success != undefined && success(data, statusText)) || (success == undefined)){
                            continueToNextStep();
                        }
                    }})
                form.ajaxSubmit(options);
                return false;
            }
        }
        continueToNextStep();
        
        return false;
    });

    form[0].backButton.click(function(){
        if(form[0].settings.historyEnabled && form[0].activatedSteps.length > 0){
            history.back();
        }else if(form[0].activatedSteps.length > 0){
            show("_" + form[0].activatedSteps[form[0].activatedSteps.length - 2]);
        }

        return false;
    });

    function continueToNextStep(){
        form[0].initialized = true;
        var step = navigate(form[0].currentStep);
        if(step == form[0].currentStep){
            animate(step,step);
            return;
        }
        if(form[0].settings.historyEnabled){
            $.historyLoad("_" + step);
        }else{
            show("_" + step);
        }
    }

    function disableNavigation(){
        form[0].nextButton.attr("disabled","disabled");
        form[0].backButton.attr("disabled","disabled");
    }
    
    function enableNavigation(){
        if(form[0].isLastStep){
            form[0].nextButton.val(form[0].settings.textSubmit);
        }else{
            form[0].nextButton.val(form[0].settings.textNext);
        }
        if(form[0].currentStep !== steps.eq(0).attr("id")){
            form[0].backButton.removeAttr("disabled").show();
        }else if(!form[0].settings.showBackOnFirstStep){
            form[0].backButton.hide();
        }
                
        form[0].nextButton.removeAttr("disabled");
    }

    function animate(oldStep, newStep){
        disableNavigation();
        var old = steps.filter("#" + oldStep);
        var current = steps.filter("#" + newStep);
        old.find(":input").attr("disabled","disabled");
        current.find(":input").removeAttr("disabled");

        if(form[0].settings.historyEnabled){
            old[form[0].settings.outAnimation](0);
            current[form[0].settings.inAnimation](400,function(){
                if(form[0].settings.focusFirstInput)
                        current.find(":input:first").focus();
                enableNavigation();                        
            });
            return;
        }
        
        old[form[0].settings.outAnimation](400, function(){
            current[form[0].settings.inAnimation](400,function(){
                if(form[0].settings.focusFirstInput)
                    current.find(":input:first").focus();
                enableNavigation();
            });        
        });
    }

    function checkIflastStep(step){
        form[0].isLastStep = false;
        if($("#" + step).hasClass(form[0].settings.submitStepClass) || steps.filter(":last").attr("id") == step){
            form[0].isLastStep = true;
        }
    }

    function getLink(step){
        var link = undefined;
        var links = steps.filter("#" + step).find(form[0].settings.linkClass);

        if(links != undefined && links.length == 1){
            link = $(links).val();
        }else if(links != undefined && links.length > 1){ 
            link = links.filter(form[0].settings.linkClass + ":checked").val();
        }else{
            link = undefined;
        }
        return link;
    }

    function navigate(step){
        var link = getLink(step);
        if(link != undefined){
            if((link != "" && link != null && link != undefined) && steps.filter("#" + link).attr("id") != undefined){
                return link;
            }
            return form[0].currentStep;                
        }else if(link == undefined && !form[0].isLastStep){    
            var currentStepIndex = steps.index($("#" + form[0].currentStep));
            return steps.filter(":eq(" + (1 * currentStepIndex + 1)  + ")").attr("id");
        }
    }
    
    function show(step){
        var backwards = false;
        if(step == undefined || step == ""){ 
                form[0].activatedSteps.pop();
                step = $(steps).eq(0).attr("id");
                form[0].activatedSteps.push(step);
        }else{    
            step = step.substr(1);
            if(form[0].activatedSteps[form[0].activatedSteps.length - 2] == step){
                backwards = true;
                form[0].activatedSteps.pop();
            }else {
                form[0].activatedSteps.push(step);
            }
        }
        var oldStep = form[0].currentStep;
        checkIflastStep(step);
        form[0].previousStep = oldStep;
        form[0].currentStep = step;
        animate(oldStep, step);    
        if(backwards){
            if(form[0].settings.afterBack)    
                form[0].settings.afterBack({"currentStep" : form[0].currentStep, 
                                                    "previousStep" : form[0].previousStep,
                                                    "isLastStep" : form[0].isLastStep, 
                                                    "activatedSteps" : form[0].activatedSteps});
        }else if(form[0].initialized){
            if(form[0].settings.afterNext)
                form[0].settings.afterNext({"currentStep" : form[0].currentStep, 
                                                        "previousStep" : form[0].previousStep,
                                                        "isLastStep" : form[0].isLastStep, 
                                                        "activatedSteps" : form[0].activatedSteps});
        }
        
    }
        
    function resetWizard(){
        form[0].reset()
        $("label,:input,textarea",this).removeClass("error");        
        for(var i = 0; i < form[0].activatedSteps.length; i++){
            steps.filter("#" + form[0].activatedSteps[i]).hide().find(":input").attr("disabled","disabled");
        }
        form[0].activatedSteps = new Array();
        form[0].previousStep = undefined;    
        form[0].isLastStep = false;    
        var step = steps.eq(0).attr("id");
        if(form[0].settings.historyEnabled){
            $.historyLoad("_" + step);
        }else{
            show("_" + step);
        }        
    }
    
    function getWizardState(){
        return { "settings" : form[0].settings,
            "activatedSteps" : form[0].activatedSteps,
            "isLastStep" : form[0].isLastStep,
            "previousStep" : form[0].previousStep,
            "currentStep" : form[0].currentStep,
            "backButton" : form[0].backButton,
            "nextButton" :form[0].nextButton
        }
    }
    
    function destroy(){
        form[0].reset();
        $(steps).show();
        if(form[0].settings.disableInputFields == true){
            $(steps).find(":input").removeAttr("disabled");
        }

        form[0].backButton.removeAttr("disabled").val(form[0].originalResetValue).show();
        form[0].nextButton.val(form[0].originalSubmitValue);
        form[0].nextButton.unbind("click");
        form[0].backButton.unbind("click")
        form[0].activatedSteps = undefined;
        form[0].previousStep = undefined;
        form[0].currentStep = undefined;
        form[0].isLastStep = undefined;
        form[0].settings = undefined;
        form[0].nextButton = undefined;
        form[0].backButton = undefined;
        form[0].formwizard = undefined;
        form[0] = undefined;
        steps = undefined;
        form = undefined;
    }
};
})(jQuery);