/* Saves the Full JSON at each modification */

Rkns.jsonIO = function(_renkan, _opts) {

    var _proj = _renkan.project;

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

        _opts.http_method = 'PUT';

    }

    var _load = function() {

        _renkan.renderer.redrawActive = false;

        _proj.set({loading_status:true});

        Rkns.$.getJSON(_opts.url, function(_data) {

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

            _proj.set({loading_status:false});

            _proj.set({save_status:0});

            _renkan.renderer.redrawActive = true;

            _renkan.renderer.autoScale();

        });

    };

    var _save = function() {

    	_proj.set({save_status:2});

        var _data = _proj.toJSON();

        if (!_renkan.read_only) {

            Rkns.$.ajax({

                type: _opts.http_method,

                url: _opts.url,

                contentType: "application/json",

                data: JSON.stringify(_data),

                success: function(data, textStatus, jqXHR) {

                	_proj.set({save_status:0});

                }

            });

        }

    };

    var _thrSave = Rkns._.throttle(

        function() {

            setTimeout(_save, 100);

        }, 1000);

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

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

            _thrSave();

        });

        _thrSave();

    });

    _proj.on("change", function() {

    	if(!(_proj.changedAttributes.length === 1 && _proj.hasChanged('save_status'))) {

    		_thrSave();

    	}

    });

    _load();

};