/* Saves the Full JSON once */

Rkns.jsonIO = function(_renkan, _opts) {

    var _proj = _renkan.project,

        _saveWarn = false,

        _onLeave = function() {

            return "Project not saved";

        };

    if (typeof _opts.http_method == "undefined") {

        _opts.http_method = 'POST';

    }

    var _load = function() {

        var getdata = {},

            rx = /id=([^&#?=]+)/,

            matches = document.location.hash.match(rx);

        if (matches) {

            getdata.id = matches[1];

        }

        Rkns.$.ajax({

            url: _opts.url,

            data: getdata,

            success: function(_data) {

                _proj.set(_data, {validate: true});

            	_renkan.renderer.autoScale();

            }

        });

    var _save = function() {

        _proj.set("saved_at", new Date());

        var _data = _proj.toJSON();

        Rkns.$.ajax({

            type: _opts.http_method,

            url: _opts.url,

            contentType: "application/json",

            data: JSON.stringify(_data),

            success: function(data, textStatus, jqXHR) {

                $(window).off("beforeunload", _onLeave);

                _saveWarn = false;

                document.location.hash = "#id=" + data.id;

                $(".Rk-Notifications").text("Saved as "+document.location.href).fadeIn().delay(2000).fadeOut();

            }

        });

    var _checkLeave = function() {

        var title = _proj.get("title");

        if (title && _proj.get("nodes").length) {

            $(".Rk-Save-Button").removeClass("disabled");

        } else {

            $(".Rk-Save-Button").addClass("disabled");

        }

        if (title) {

            $(".Rk-PadTitle").css("border-color","#333333");

        }

        if (!_saveWarn) {

            _saveWarn = true;

            $(window).on("beforeunload", _onLeave);

        }

    _load();

    _proj.on("add:nodes add:edges add:users change", function(_model) {

        _model.on("change remove", function(_model) {

            _checkLeave();

        });

        _checkLeave();

    });

    $(".Rk-Save-Button").click(function() {

        if ($(this).hasClass("disabled")) {

            if (!_proj.get("title")) {

                $(".Rk-PadTitle").css("border-color","#ff0000");

            }

        } else {

            _save();

        }

    });