var PetDAO = (function() {
	var resourcePath = "rest/pets/";
	var peopleID = atob(localStorage.getItem('peopleID'));
    var requestByAjax = function(data, done, fail, always) {
		done = typeof done !== 'undefined' ? done : function() {};
		fail = typeof fail !== 'undefined' ? fail : function() {};
		always = typeof always !== 'undefined' ? always : function() {};
	
		let authToken = localStorage.getItem('authorization-token');
		if (authToken !== null) {
		    data.beforeSend = function(xhr) {
			xhr.setRequestHeader('Authorization', 'Basic ' + authToken);
		    };
		}
	
		$.ajax(data).done(done).fail(fail).always(always);
    };

    function PetDAO() {
    	this.listPetsByPeopleID = function(done, fail, always) {
		    requestByAjax({
			url : resourcePath + 'people' + peopleID,
			type : 'GET'
		    }, done, fail, always);
    	};

	    this.addPet = function(pet, done, fail, always) {
		    requestByAjax({
			url : resourcePath,
			type : 'POST',
			data : pet
		    }, done, fail, always);
		};

		this.modifyPet = function(pet, done, fail, always) {
		    requestByAjax({
			url : resourcePath + pet.id,
			type : 'PUT',
			data : pet
		    }, done, fail, always);
		};

		this.deletePet = function(id, done, fail, always) {
		    requestByAjax({
			url : resourcePath + id,
			type : 'DELETE',
		    }, done, fail, always);
		};
	}

	return PetDAO;
})();