/*
 * SmartWizard
 * a javascript wizard control
 * http://tech-laboratory.blogspot.com
 * 
 * Date: 04-AUG-2009
 * Version: 0.98
 */
 
 
(function($) {
    $.fn.smartWizard = function(options) {
        var defaults = {
            selectedStep: 0,  // Selected Step, 0 = first step
            errorSteps: [],    // Array Steps with errors
            enableAll: false,  // Enable All Steps, true/false
            animation: true,   // Animation Effect on navigation, true/false         
            validatorFunc: function() { return true; } // Step validation function, Step index will be passed
        };
        var options = $.extend(defaults, options);

        return this.each(function() {
            obj = $(this);
            var wizcurrent = 0;
            var steps = $("ul > li > a", obj);
            // Apply Default Style to Steps
            applyCSS($(steps, obj), "wiz-anc-default");
            // Hide All Steps on load
            hideAllSteps();

            $(steps, obj).bind("click", function(e) {
                e.preventDefault();
                var isDone = $(this, obj).attr("isDone");
                var curStepIdx = $(steps, obj).index(wizcurrent);
                if (isDone == 1) {
                    var selIdx = steps.index(this);
                    if (selIdx > curStepIdx) {
                        if (options.validatorFunc(curStepIdx)) {
                            applyCSS($(wizcurrent, obj), "wiz-anc-done");
                            selectStep(selIdx);
                            $("#smartwizard").animate({ scrollTop: 0 }, 500);
                        }
                    }
                    else {
                        applyCSS($(wizcurrent, obj), "wiz-anc-done");
                        selectStep(selIdx);
                    }

                }
            });
            // activates steps up to the selected step
            for (i = 0; i < steps.length; i++) {
                if (i <= options.selectedStep || options.enableAll == true) {
                    activateStep(i);
                }
            }
            // highlight steps with errors
            $.each(options.errorSteps, function(i, n) {
                //applyCSS(steps.eq(n),"wiz-anc-error");
                setErrorStep(n)
            });

            selectStep(options.selectedStep);
            //Next Navigation
            $(".next", obj).bind("click", function(e) {
                e.preventDefault();
                var curStepIdx = $(steps, obj).index(wizcurrent);
                if (options.validatorFunc(curStepIdx)) {
                    var nextStepIdx = curStepIdx + 1;
                    applyCSS($(wizcurrent, obj), "wiz-anc-done");
                    selectStep(nextStepIdx);
                    $("#smartwizard").animate({ scrollTop: 0 }, 500);
                }

            });

            //Back Navigation
            $(".back", obj).bind("click", function(e) {
                e.preventDefault();
                applyCSS($(wizcurrent, obj), "wiz-anc-done");
                var prevIdx = $(steps, obj).index(wizcurrent) - 1;
                selectStep(prevIdx);
                $("#smartwizard").animate({ scrollTop: 0 }, 500);
            });

            function selectStep(idx) {
                if (idx < steps.length && idx >= 0) {
                    var selStepAnchor = $(steps, obj).eq(idx);
                    var selStepIdx = selStepAnchor.attr("href");
                    hideAllSteps();
                    selStepAnchor.attr("isDone", "1");

                    if (options.animation == true) {
                        $(selStepIdx, obj).fadeIn("fast");
                    } else {
                        $(selStepIdx, obj).show();
                    }
                    applyCSS($(selStepAnchor, obj), "wiz-anc-current");
                    wizcurrent = selStepAnchor;
                }
            }

            function activateStep(idx) {
                var selStepAnchor = steps.eq(idx);
                selStepAnchor.attr("isDone", "1");
                applyCSS($(selStepAnchor, obj), "wiz-anc-done");
            }

            function setErrorStep(idx) {
                var selStepAnchor = steps.eq(idx);
                selStepAnchor.attr("isError", "1");
                $(selStepAnchor, obj).addClass("wiz-anc-error");
            }

            function unsetErrorStep(idx) {
                var selStepAnchor = steps.eq(idx);
                selStepAnchor.attr("isError", "");
                $(selStepAnchor, obj).removeClass("wiz-anc-error");
            }

            function hideAllSteps() {
                $(steps, obj).each(function() {
                    $($(this, obj).attr("href"), obj).hide();
                });
            }

            function applyCSS(elm, css) {
                $(elm, obj).removeClass("wiz-anc-default");
                $(elm, obj).removeClass("wiz-anc-current");
                $(elm, obj).removeClass("wiz-anc-done");
                $(elm, obj).addClass(css);
            }
        });
    };
})(jQuery);