var PetsView = (function () {
    var dao;

    // Referencia a this que permite acceder a las funciones públicas desde las funciones de jQuery.
    var self;

    var formId = 'pets-form';
    var listId = 'pets-list';
    var formQuery = '#' + formId;
    var listQuery = '#' + listId;

    function PetsView(owner, petsDao, formContainerId, listContainerId) {
        dao = petsDao;
        self = this;

        insertPetsForm($('#' + formContainerId));
        insertPetsList($('#' + listContainerId));

        this.init = function () {
            dao.listPets(owner, function (pets) {
                    $.each(pets, function (key, pet) {
                        appendToTable(pet);
                    });
                },
                function () {
                    alert('No has sido posible acceder al listado de mascotas.');
                });

            // La acción por defecto de enviar formulario (submit) se sobreescribe
            // para que el envío sea a través de AJAX
            $(formQuery).submit(function (event) {
                var pet = self.getPetInForm();

                if (self.isEditing()) {
                    dao.modifyPet(pet,
                        function (pet) {
                            $('#pet-' + pet.id + ' td.name').text(pet.name);
                            $('#pet-' + pet.id + ' td.owner').text(pet.owner);
                            self.resetForm();
                        },
                        showErrorMessage,
                        self.enableForm
                    );
                } else {
                    dao.addPet(pet,
                        function (pet) {
                            appendToTable(pet);
                            self.resetForm();
                        },
                        showErrorMessage,
                        self.enableForm
                    );
                }

                return false;
            });

            $('#btnClear').click(this.resetForm);
        };

        this.getPetInForm = function () {
            var form = $(formQuery);
            return {
                'id': form.find('input[name="id"]').val(),
                'name': form.find('input[name="name"]').val(),
                'owner': form.find('input[name="owner"]').val()
            };
        };

        this.getPetInRow = function (id) {
            var row = $('#pet-' + id);

            if (row !== undefined) {
                return {
                    'id': id,
                    'name': row.find('td.name').text(),
                    'owner': row.find('td.owner').text()
                };
            } else {
                return undefined;
            }
        };

        this.editPet = function (id) {
            var row = $('#pet-' + id);

            if (row !== undefined) {
                var form = $(formQuery);

                form.find('input[name="id"]').val(id);
                form.find('input[name="name"]').val(row.find('td.name').text());
                form.find('input[name="owner"]').val(row.find('td.owner').text());

                $('input#btnSubmit').val('Modificar');
            }
        };

        this.deletePet = function (id) {
            if (confirm('Está a punto de eliminar a una mascota. ¿Está seguro de que desea continuar?')) {
                dao.deletePet(id,
                    function () {
                        $('tr#pet-' + id).remove();
                    },
                    showErrorMessage
                );
            }
        };

        this.showPets = function (id) {


        }

        this.isEditing = function () {
            return $(formQuery + ' input[name="id"]').val() != "";
        };

        this.disableForm = function () {
            $(formQuery + ' input').prop('disabled', true);
        };

        this.enableForm = function () {
            $(formQuery + ' input').prop('disabled', false);
        };

        this.resetForm = function () {
            $(formQuery)[0].reset();
            $(formQuery + ' input[name="id"]').val('');
            $('#btnSubmit').val('Crear');
        };
    };

    var insertPetsList = function (parent) {
        parent.append(
            '<table id="' + listId + '" class="table">\
				<thead>\
					<tr class="row">\
						<th class="col-sm-4">Nombre</th>\
						<th class="col-sm-5">Propietario</th>\
						<th class="col-sm-3">&nbsp;</th>\
					</tr>\
				</thead>\
				<tbody>\
				</tbody>\
			</table>'
        );
    };

    var insertPetsForm = function (parent) {
        parent.append(
            '<form id="' + formId + '" class="mb-5 mb-10">\
				<input name="id" type="hidden" value=""/>\
				<div class="row">\
					<div class="col-sm-4">\
						<input name="name" type="text" value="" placeholder="Nombre" class="form-control" required/>\
					</div>\
					<div class="col-sm-5">\
						<input name="owner" type="text" value="" placeholder="Dueño" class="form-control" required/>\
					</div>\
					<div class="col-sm-3">\
						<input id="btnSubmit" type="submit" value="Crear" class="btn btn-primary" />\
						<input id="btnClear" type="reset" value="Limpiar" class="btn" />\
					</div>\
				</div>\
			</form>'
        );
    };

    var createPetRow = function (pet) {
        return '<tr id="pet-' + pet.id + '" class="row">\
			<td class="name col-sm-6 col-md-3">' + pet.name + '</td>\
			<td class="owner col-sm-6 col-md-4">' + pet.owner + '</td>\
			<td class="col-sm-12 col-md-5">\
				<a class="edit btn btn-warning" href="#">Editar</a>\
				<a class="delete btn btn-danger" href="#">Eliminar</a>\
			</td>\
		</tr>';
    };

    var showErrorMessage = function (jqxhr, textStatus, error) {
        alert(textStatus + ": " + error);
    };

    var addRowListeners = function (pet) {
        $('#pet-' + pet.id + ' a.edit').click(function () {
            self.editPet(pet.id);
        });

        $('#pet-' + pet.id + ' a.delete').click(function () {
            self.deletePet(pet.id);
        });
    };

    var appendToTable = function (pet) {
        $(listQuery + ' > tbody:last')
            .append(createPetRow(pet));
        addRowListeners(pet);
    };

    return PetsView;
})();