/* 

 *  Copyright 2012 Institut de recherche et d'innovation 

 *  contributor(s) : Samuel Huron, Raphael Velt

 *   

 *  contact@iri.centrepompidou.fr

 *  http://www.iri.centrepompidou.fr 

 *   

 *  This software is a computer program whose purpose is to show and add annotations on a video .

 *  This software is governed by the CeCILL-C license under French law and

 *  abiding by the rules of distribution of free software. You can  use, 

 *  modify and/ or redistribute the software under the terms of the CeCILL-C

 *  license as circulated by CEA, CNRS and INRIA at the following URL

 *  "http://www.cecill.info". 

 *  

 *  The fact that you are presently reading this means that you have had

 *  knowledge of the CeCILL-C license and that you accept its terms.

*/

Rkns = {

    _NODE_RADIUS: 20,

    _NODE_FONT_SIZE: 14,

    _ARROW_LENGTH: 20,

    _ARROW_WIDTH: 15,

    _RENDER: 1,

    _SAVE: 2,

    _RENDER_AND_SAVE: 3

}

Rkns.$ = jQuery;

Rkns._ = _;

Rkns.Serializers = {};

Rkns.Serializers._Base = function(_project) {

    if (typeof _project !== "undefined") {

        this._project = _project;

        this._callbackQueue = [];

        this._loaded = false;

    }

}

Rkns.Serializers._Base.prototype.deserialize = function() {}

Rkns.Serializers._Base.prototype.deferCallback = function(_callback) {

    var _this = this;

    Rkns._.defer(function() {

        _callback.call(_this);

    });

}

Rkns.Serializers._Base.prototype.handleCallbacks = function() {

    this._loaded = true;

    while (this._callbackQueue.length) {

        this.deferCallback(this._callbackQueue.splice(0,1)[0]);

    }

}

Rkns.Serializers._Base.prototype.onLoad = function(_callback) {

    if (this._loaded) {

        this.deferCallback(_callback);

    } else {

        this._callbackQueue.push(_callback);

    }

}

Rkns.Serializers._Base.prototype.save = function() {}

Rkns.Renderers = {};

Rkns.Renderers._Base = function(_project) {

    if (typeof _project !== "undefined") {

        this._project = _project;

    }

}

Rkns.Project = function(_opts) {

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

        _opts.serializer = "BasicJson";

    }

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

        _opts.renderer = "Paper";

    }

    this._opts = _opts;

    this.users = new Rkns.Model.List();

    this.nodes = new Rkns.Model.List();

    this.edges = new Rkns.Model.List();

    if (typeof this._opts.user === "object") {

        this.current_user = this.addUser(this._opts.user)

    }

    this.serializer = new Rkns.Serializers[_opts.serializer](this);

    this.renderer = new Rkns.Renderers[_opts.renderer](this);

    var _this = this;

    this.serializer.onLoad(function() {

        if (typeof _this.current_user === "undefined") {

            _this.current_user = _proj.users[0];

        }

        _this.renderer.draw();

    });

}

Rkns.Project.prototype.addNode = function(_props, _render_save) {

    var _node = new Rkns.Model.Node(this, _props);

    this.nodes.push(_node);

    if (typeof _render_save !== "undefined" && (_render_save&Rkns._RENDER)) {

        _controller.redraw();

    }

    if (typeof _render_save !== "undefined" && (_render_save&Rkns._SAVE)) {

        this.serializer.save();

    }

    return _node;

}

Rkns.Project.prototype.addEdge = function(_props, _render_save) {

    var _edge = new Rkns.Model.Edge(this, _props);

    this.edges.push(_edge);

    if (typeof _render_save !== "undefined" && (_render_save&Rkns._RENDER)) {

        _controller.redraw();

    }

    if (typeof _render_save !== "undefined" && (_render_save&Rkns._SAVE)) {

        this.serializer.save();

    }

    return _edge;

}

Rkns.Project.prototype.addUser = function(_props, _render_save) {

    var _user = new Rkns.Model.User(this, _props);

    this.users.push(_user);

    return _user;

}

/* Utility functions */

Rkns.Utils = {

    _ID_AUTO_INCREMENT : 0,

    _ID_BASE : (function(_d) {

        function pad(n){return n<10 ? '0'+n : n}

        function fillrand(n) {

            var _res = ''

            for (var i=0; i<n; i++) {

                _res += Math.floor(16*Math.random()).toString(16);

            }

            return _res;

        }

        return _d.getUTCFullYear() + '-'  

            + pad(_d.getUTCMonth()+1) + '-'  

            + pad(_d.getUTCDate()) + '-'

            + fillrand(16);

    })(new Date()),

    getUID : function(_base) {

        var _n = (++this._ID_AUTO_INCREMENT).toString(16),

            _base = (typeof _base === "undefined" ? "" : _base + "-" );

        while (_n.length < 4) {

            _n = '0' + _n

        }

        return _base + this._ID_BASE + '-' + _n;

    },

    inherit : function(_baseClass, _callbefore) {

        var _class = function() {

            if (typeof _callbefore === "function") {

                _callbefore.apply(this, Array.prototype.slice.call(arguments, 0));

            }

            if (typeof _baseClass.prototype._init !== "function") {

                _baseClass.prototype._init = function() {}

            }

            _baseClass.apply(this, Array.prototype.slice.call(arguments, 0));

            this._init.apply(this, Array.prototype.slice.call(arguments, 0));

        }

        _class.prototype = new _baseClass();

        return _class;

    }

}