function SwaggerService(baseUrl, _apiKey, statusCallback) {
    if(!baseUrl)
        throw new Error("baseUrl must be passed while creating SwaggerService");

	// constants
    baseUrl = jQuery.trim(baseUrl);
    if(baseUrl.length == 0)
        throw new Error("baseUrl must be passed while creating SwaggerService");

    if(!(baseUrl.toLowerCase().indexOf("http:") == 0 || baseUrl.toLowerCase().indexOf("https:") == 0)) {
        baseUrl = ("http://" + baseUrl);
    }

    log("using base url " + baseUrl);

    var apiHost = baseUrl.substr(0, baseUrl.lastIndexOf("/"));
    var rootResourcesApiName = baseUrl.substr(baseUrl.lastIndexOf("/") + 1, (baseUrl.lastIndexOf(".") - baseUrl.lastIndexOf("/") - 1));

    var statusListener = statusCallback;
    var apiKey = _apiKey;

    var apiKeySuffix = "";
    if(apiKey) {
        apiKey = jQuery.trim(apiKey);
        if(apiKey.length > 0)
            apiKeySuffix = "?api_key=" + apiKey;
    }
    log("apiHost=" + apiHost);
    log("apiKey=" + apiKey);
    log("rootResourcesApiName = " + rootResourcesApiName);

	// utility functions
	function log(m) {
	    if (window.console) console.log(m);
	}

	function error(m) {
	    if (window.console) console.log("ERROR: " + m);
	}

    function updateStatus(status) {
        statusListener(status);
    }

    // make some models public
	this.ApiResource = function() {return ApiResource;};

    this.apiHost = function() {return apiHost;};

	// Model: ApiResource
	var ApiResource = Spine.Model.setup("ApiResource", ["name", "baseUrl", "path", "path_json", "path_xml", "description", "apiLists", "modelList"]);
    ApiResource.include({
		path_json: null,
		path_xml: null,
		
		init: function(atts) {
	        if (atts) this.load(atts);
			this.path_json = this.path + ".json";
			this.path_xml = this.path + ".xml";
            this.baseUrl = apiHost;
            this.name = this.path.substr(1, this.path.length);
            this.apiList = Api.sub();
            this.modelList = ApiModel.sub();
		},

        addApis: function(apiObjects) {
            this.apiList.createAll(apiObjects);
        },

        addModel: function(modelObject) {
            this.modelList.create(modelObject);
        },
		
		toString: function() {
			return this.path_json +  ": " + this.description;
		}
    });

	// Model: Api
	var Api = Spine.Model.setup("Api", ["baseUrl", "path", "path_json", "path_xml", "name", "description", "operations", "path_json", "path_xml"]);
    Api.include({
		init: function(atts) {
	        if (atts) this.load(atts);

            this.baseUrl = apiHost;

            var secondPathSeperatorIndex = this.path.indexOf("/", 1);
            if(secondPathSeperatorIndex > 0) {
				var prefix = this.path.substr(0, secondPathSeperatorIndex);
				var suffix = this.path.substr(secondPathSeperatorIndex, this.path.length);
				// log(this.path + ":: " + prefix + "..." + suffix);

				this.path_json = prefix + ".json" + suffix;
				this.path_xml = prefix + ".xml" + suffix;;

                if(this.path.indexOf("/") == 0) {
                    this.name = this.path.substr(1, secondPathSeperatorIndex - 1);
                } else {
                    this.name = this.path.substr(0, secondPathSeperatorIndex - 1);
                }
			} else {
				this.path_json = this.path + ".json";
				this.path_xml = this.path + ".xml";

                if(this.path.indexOf("/") == 0) {
                    this.name = this.path.substr(1, this.path.length);
                } else {
                    this.name = this.path.substr(0, this.path.length);
                }
			}

	        var value  = this.operations;

	        this.operations = ApiOperation.sub();
	        if (value) {
                for (var i = 0; i < value.length; i++) {
                    var obj = value[i];
                    obj.apiName = this.name;
                    obj.path = this.path;
                    obj.path_json = this.path_json;
                    obj.path_xml = this.path_xml;

                }

                this.operations.refresh(value);
            }

            updateStatus("Loading " + this.path + "...");

		},
		
		toString: function() {
			var opsString = "";
			for(var i = 0; i < this.operations.all().length; i++) {
				var e = this.operations.all()[i];
				
				if(opsString.length > 0)
					opsString += ", ";

				opsString += e.toString();
			}
			return this.path_json +  "- " + this.operations.all().length + " operations: " + opsString;
		}
		
    });

	// Model: ApiOperation
	var ApiOperation = Spine.Model.setup("ApiOperation", ["baseUrl", "path", "path_json", "path_xml", "summary", "deprecated", "open", "httpMethod", "httpMethodLowercase", "nickname", "responseClass", "parameters", "apiName"]);
    ApiOperation.include({
		init: function(atts) {
	        if (atts) this.load(atts);

            this.baseUrl = apiHost;
            this.httpMethodLowercase = this.httpMethod.toLowerCase();

	        var value = this.parameters;
	        this.parameters = ApiParameter.sub();
	        if (value) this.parameters.refresh(value);
		},

		toString: function() {
			var paramsString = "(";
			for(var i = 0; i < this.parameters.all().length; i++) {
				var e = this.parameters.all()[i];
				
				if(paramsString.length > 1)
					paramsString += ", ";

				paramsString += e.toString();
			}
			paramsString += ")";

			return "{" + this.path_json + "| " + this.nickname  + paramsString + ": " + this.summary + "}";
		},

        invocationUrl: function(formValues) {
            var formValuesMap = new Object();
            for (var i = 0; i < formValues.length; i++) {
                var formValue = formValues[i];
                if(formValue.value && jQuery.trim(formValue.value).length > 0)
                    formValuesMap[formValue.name] = formValue.value;
            }

            var urlTemplateText = this.path_json.split("{").join("${");
            log("url template = " + urlTemplateText);
            var urlTemplate = $.template(null, urlTemplateText);
            var url = $.tmpl(urlTemplate, formValuesMap)[0].data;
            log("url with path params = " + url);

            var queryParams = apiKeySuffix;
            this.parameters.each(function (param) {
                var paramValue = jQuery.trim(formValuesMap[param.name]);
                if(param.paramType == "query" && paramValue.length > 0) {
                    queryParams += queryParams.length > 0 ? "&" : "?";
                    queryParams += param.name;
                    queryParams += "=";
                    queryParams += formValuesMap[param.name];
                }
            });

            url = this.baseUrl + url + queryParams;
            log("final url with query params and base url = " + url);

            return url;
        }
		
    });

	// Model: ApiParameter
	var ApiParameter = Spine.Model.setup("ApiParameter", ["name", "description", "required", "dataType", "allowableValues", "paramType", "allowMultiple"]);
	ApiParameter.include({
		init: function(atts) {
	        if (atts) this.load(atts);

            this.name = this.name || this.dataType;
		},

		toString: function() {
			if(this.allowableValues && this.allowableValues.length > 0)
				return this.name +  ": " + this.dataType + " [" + this.allowableValues + "]";
			else
				return this.name +  ": " + this.dataType;
		}
		
    });

	// Model: ApiModel
	var ApiModel = Spine.Model.setup("ApiModel", ["id", "fields"]);
	ApiModel.include({
		init: function(atts) {
	        if (atts) this.load(atts);
			
			if(!this.fields) {
		        var propertiesListObject  = this.properties;
		        this.fields = ApiModelProperty.sub();

				for(var propName in propertiesListObject) {
					if(propName != "parent") {
						var p = propertiesListObject[propName];
						p.name = propName;
						p.id = Spine.guid();
						// log(p);

						this.fields.create(p);
					}
				}
				//log("got " + this.fields.count() + " fields for " + this.id);

			}
		},

		toString: function() {
			var propsString = "";
			
			propsString += "(";
			for(var i = 0; i < this.fields.all().length; i++) {
				var e = this.fields.all()[i];
				
				if(propsString.length > 1)
					propsString += ", ";
			
				propsString += e.toString();
			}
			propsString += ")";

			if(this.required)
				return this.id + " (required): " + propsString;
			else
				return this.id +  ": " + propsString;
		}
		
    });


	// Model: ApiModelProperty
	var ApiModelProperty = Spine.Model.setup("ApiModelProperty", ["name", "required", "dataType"]);
	ApiModelProperty.include({
		init: function(atts) {
	        if (atts) this.load(atts);

			if(!this.dataType) {
				if(atts.type == "any")
					this.dataType = "object";
				else if(atts.type == "array") {
					if(atts.items) {
						if(atts.items.$ref) {
							this.dataType = "array[" + atts.items.$ref + "]";
						} else {
							this.dataType = "array[" + atts.items.type + "]"
						}
					} else {
						this.dataType = "array";
					}
				} else
					this.dataType = atts.type;

			}
		},

		toString: function() {
			if(this.required)
				return this.name +  ": " + this.dataType + " (required)";
			else
				return this.name +  ": " + this.dataType;
		}
		
    });

	// Controller
    var ModelController = Spine.Controller.create({
		countLoaded: 0,
	    proxied: ["fetchResources", "loadResources", "apisLoaded", "modelsLoaded"],
	
        init: function() {
			log("ModelController.init");

			this.fetchEndpoints();
        },

		fetchEndpoints: function() {
            var controller = this;

            updateStatus("Fetching API List...");
            $.getJSON(apiHost + "/" + rootResourcesApiName + ".json" + apiKeySuffix, function(response) {
				//log(response);
				ApiResource.createAll(response.apis);

                // get rid of the root resource list api since we're not going to document that
                var obj = ApiResource.findByAttribute("name", rootResourcesApiName);
                if(obj)
                    obj.destroy();


                controller.fetchResources();
			});
		},
		
		fetchResources: function() {
			//log("fetchResources");
			//ApiResource.logAll();

			for(var i = 0; i < ApiResource.all().length; i++) {
				var apiResource = ApiResource.all()[i];
                this.fetchResource(apiResource);
			}
		},

        fetchResource: function(apiResource) {
            var controller = this;
            updateStatus("Fetching " + apiResource.name + "...");
            $.getJSON(apiHost + apiResource.path_json + apiKeySuffix, function(response) {
                controller.loadResources(response, apiResource);
            });
        },

		loadResources: function(response, apiResource) {
			try {
				this.countLoaded++;
//				log(response);

				apiResource.addApis(response.apis);
//                updateStatus("Parsed Apis");

				//log(response.models);
				if(response.models) {
					// log("response.models.length = " + response.models.length);

					for(var modeName in response.models) {
						var m = response.models[modeName];
						// log("creating " + m.id);

                        apiResource.addModel(m);
//						apiResource.modelList.create(m);
					}
				}

                updateStatus();
			} finally {
				if(this.countLoaded == ApiResource.count()) {
					log("all models/api loaded");
					ApiResource.trigger("refresh");
				}
			}
		}

    });

   	this.init = function() {
		this.modelController = ModelController.init();
	}
};