/*
* jQuery Impromptu
* By: Trent Richardson [http://trentrichardson.com]
* Version 2.5
* Last Modified: 3/30/2009
* 
* Copyright 2009 Trent Richardson
* Dual licensed under the MIT and GPL licenses.
* http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
* http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
* 
*/

(function($) {
    $.prompt = function(message, options) {
        options = $.extend({}, $.prompt.defaults, options);
        $.prompt.currentPrefix = options.prefix;

        var ie6 = ($.browser.msie && $.browser.version < 7);
        var $body = $(document.body);
        var $window = $(window);

        //build the box and fade
        var msgbox = '<div class="' + options.prefix + 'box" id="' + options.prefix + 'box">';
        if (options.useiframe && (($('object, applet').length > 0) || ie6)) {
            msgbox += '<iframe src="javascript:;" class="' + options.prefix + 'fade" id="' + options.prefix + 'fade"></iframe>';
        } else {
            if (ie6) {
                $('select').css('visibility', 'hidden');
            }
            msgbox += '<div class="' + options.prefix + 'fade" id="' + options.prefix + 'fade"></div>';
        }
        msgbox += '<div class="' + options.prefix + '" id="' + options.prefix + '"><div class="' + options.prefix + 'container"><div class="';
        msgbox += options.prefix + 'close">X</div><div id="' + options.prefix + 'states"></div>';
        msgbox += '</div></div></div>';

        var $jqib = $(msgbox).appendTo($body);
        var $jqi = $jqib.children('#' + options.prefix);
        var $jqif = $jqib.children('#' + options.prefix + 'fade');

        //if a string was passed, convert to a single state
        if (message.constructor == String) {
            message = {
                state0: {
                    html: message,
                    buttons: options.buttons,
                    focus: options.focus,
                    submit: options.submit
                }
            };
        }

        //build the states
        var states = "";

        $.each(message, function(statename, stateobj) {
            stateobj = $.extend({}, $.prompt.defaults.state, stateobj);
            message[statename] = stateobj;

            states += '<div id="' + options.prefix + '_state_' + statename + '" class="' + options.prefix + '_state" style="display:none;"><div class="' + options.prefix + 'message">' + stateobj.html + '</div><div class="' + options.prefix + 'buttons">';
            $.each(stateobj.buttons, function(k, v) {
                states += '<button name="' + options.prefix + '_' + statename + '_button' + k + '" id="' + options.prefix + '_' + statename + '_button' + k + '" value="' + v + '">' + k + '</button>';
            });
            states += '</div></div>';
        });

        //insert the states...
        $jqi.find('#' + options.prefix + 'states').html(states).children('.' + options.prefix + '_state:first').css('display', 'block');
        $jqi.find('.' + options.prefix + 'buttons:empty').css('display', 'none');

        //Events
        $.each(message, function(statename, stateobj) {
            var $state = $jqi.find('#' + options.prefix + '_state_' + statename);

            $state.children('.' + options.prefix + 'buttons').children('button').click(function() {
                var msg = $state.children('.' + options.prefix + 'message');
                var clicked = stateobj.buttons[$(this).text()];
                var forminputs = {};

                //collect all form element values from all states
                $.each($jqi.find('#' + options.prefix + 'states :input').serializeArray(), function(i, obj) {
                    if (forminputs[obj.name] === undefined) {
                        forminputs[obj.name] = obj.value;
                    } else if (typeof forminputs[obj.name] == Array) {
                        forminputs[obj.name].push(obj.value);
                    } else {
                        forminputs[obj.name] = [forminputs[obj.name], obj.value];
                    }
                });

                var close = stateobj.submit(clicked, msg, forminputs);
                if (close === undefined || close) {
                    removePrompt(true, clicked, msg, forminputs);
                }
            });
            $state.find('.' + options.prefix + 'buttons button:eq(' + stateobj.focus + ')').addClass(options.prefix + 'defaultbutton');

        });

        var ie6scroll = function() {
            $jqib.css({ top: $window.scrollTop() });
        };

        var fadeClicked = function() {
            if (options.persistent) {
                var i = 0;
                $jqib.addClass(options.prefix + 'warning');
                var intervalid = setInterval(function() {
                    $jqib.toggleClass(options.prefix + 'warning');
                    if (i++ > 1) {
                        clearInterval(intervalid);
                        $jqib.removeClass(options.prefix + 'warning');
                    }
                }, 100);
            }
            else {
                removePrompt();
            }
        };

        var escapeKeyClosePrompt = function(e) {
            var key = (window.event) ? event.keyCode : e.keyCode; // MSIE or Firefox?
            if (key == 27) {
                removePrompt();
            }
        };

        var positionPrompt = function() {
            $jqib.css({
                position: (ie6) ? "absolute" : "fixed",
                height: $window.height(),
                width: "100%",
                top: (ie6) ? $window.scrollTop() : 0,
                left: 0,
                right: 0,
                bottom: 0
            });
            $jqif.css({
                position: "absolute",
                height: $window.height(),
                width: "100%",
                top: 0,
                left: 0,
                right: 0,
                bottom: 0
            });
            $jqi.css({
                position: "absolute",
                top: options.top,
                left: "50%",
                marginLeft: (($jqi.outerWidth() / 2) * -1)
            });
        };

        var stylePrompt = function() {
            $jqif.css({
                zIndex: options.zIndex,
                display: "none",
                opacity: options.opacity
            });
            $jqi.css({
                zIndex: options.zIndex + 1,
                display: "none"
            });
            $jqib.css({
                zIndex: options.zIndex
            });
        };

        var removePrompt = function(callCallback, clicked, msg, formvals) {
            $jqi.remove();
            //ie6, remove the scroll event
            if (ie6) {
                $body.unbind('scroll', ie6scroll);
            }
            $window.unbind('resize', positionPrompt);
            $jqif.fadeOut(options.overlayspeed, function() {
                $jqif.unbind('click', fadeClicked);
                $jqif.remove();
                if (callCallback) {
                    options.callback(clicked, msg, formvals);
                }
                $jqib.unbind('keypress', escapeKeyClosePrompt);
                $jqib.remove();
                if (ie6 && !options.useiframe) {
                    $('select').css('visibility', 'visible');
                }
            });
        };

        positionPrompt();
        stylePrompt();

        //ie6, add a scroll event to fix position:fixed
        if (ie6) {
            $window.scroll(ie6scroll);
        }
        $jqif.click(fadeClicked);
        $window.resize(positionPrompt);
        $jqib.keypress(escapeKeyClosePrompt);
        $jqi.find('.' + options.prefix + 'close').click(removePrompt);

        //Show it
        $jqif.fadeIn(options.overlayspeed);
        $jqi[options.show](options.promptspeed, options.loaded);
        $jqi.find('#' + options.prefix + 'states .' + options.prefix + '_state:first .' + options.prefix + 'defaultbutton').focus();

        return $jqib;
    };

    $.prompt.defaults = {
        prefix: 'jqi',
        buttons: {
            Ok: true
        },
        loaded: function() {

        },
        submit: function() {
            return true;
        },
        callback: function() {

        },
        opacity: 0.6,
        zIndex: 999,
        overlayspeed: 'slow',
        promptspeed: 'fast',
        show: 'fadeIn',
        focus: 0,
        useiframe: false,
        top: "15%",
        persistent: true,
        state: {
            html: '',
            buttons: {
                Ok: true
            },
            focus: 0,
            submit: function() {
                return true;
            }
        }
    };

    $.prompt.currentPrefix = $.prompt.defaults.prefix;

    $.prompt.setDefaults = function(o) {
        $.prompt.defaults = $.extend({}, $.prompt.defaults, o);
    };

    $.prompt.setStateDefaults = function(o) {
        $.prompt.defaults.state = $.extend({}, $.prompt.defaults.state, o);
    };

    $.prompt.getStateContent = function(state) {
        return $('#' + $.prompt.currentPrefix + '_state_' + state);
    };

    $.prompt.goToState = function(state) {
        $('.' + $.prompt.currentPrefix + '_state').slideUp('slow');
        $('#' + $.prompt.currentPrefix + '_state_' + state).slideDown('slow', function() {
            $(this).find('.' + $.prompt.currentPrefix + 'defaultbutton').focus();
        });
    };

    $.prompt.nextState = function() {
        var $next = $('.' + $.prompt.currentPrefix + '_state:visible').next();

        $('.' + $.prompt.currentPrefix + '_state').slideUp('slow');

        $next.slideDown('slow', function() {
            $next.find('.' + $.prompt.currentPrefix + 'defaultbutton').focus();
        });
    };

    $.prompt.prevState = function() {
        var $next = $('.' + $.prompt.currentPrefix + '_state:visible').prev();

        $('.' + $.prompt.currentPrefix + '_state').slideUp('slow');

        $next.slideDown('slow', function() {
            $next.find('.' + $.prompt.currentPrefix + 'defaultbutton').focus();
        });
    };

    $.prompt.close = function() {
        $('#' + $.prompt.currentPrefix + 'box').fadeOut('fast', function() {
            $(this).remove();
        });
    };

})(jQuery);