class BP_Nouveau_Customizer_Group_Nav extends BP_Core_Nav {
	/**
	 * Constructor
	 *
	 * @param int $object_id Optional. The random group ID used to generate the nav.
	 */
	public function __construct( $object_id = 0 ) {
		$error = new WP_Error( 'missing_parameter' );

		if ( empty( $object_id ) || ! bp_current_user_can( 'bp_moderate' ) || ! did_action( 'admin_init' ) ) {
			return $error;
		}

		$group = groups_get_group( array( 'group_id' => $object_id ) );
		if ( empty( $group->id ) ) {
			return $error;
		}

		$this->group = $group;

		parent::__construct( $group->id );
		$this->setup_nav();
	}

	/**
	 * Checks whether a property is set.
	 *
	 * Overrides BP_Core_Nav::__isset() to avoid looking into its nav property.
	 *
	 * @since 3.0.0
	 *
	 * @param string $key The property.
	 *
	 * @return bool True if the property is set, false otherwise.
	 */
	public function __isset( $key ) {
		return isset( $this->{$key} );
	}

	/**
	 * Gets a property.
	 *
	 * Overrides BP_Core_Nav::__isset() to avoid looking into its nav property.
	 *
	 * @since 3.0.0
	 *
	 * @param string $key The property.
	 *
	 * @return mixed The value corresponding to the property.
	 */
	public function __get( $key ) {
		if ( ! isset( $this->{$key} ) ) {
			$this->{$key} = null;
		}

		return $this->{$key};
	}

	/**
	 * Sets a property.
	 *
	 * Overrides BP_Core_Nav::__isset() to avoid adding a value to its nav property.
	 *
	 * @since 3.0.0
	 *
	 * @param string $key The property.
	 *
	 * @param mixed $value The value of the property.
	 */
	public function __set( $key, $value ) {
		$this->{$key} = $value;
	}

	/**
	 * Setup a temporary nav with only the needed parameters.
	 *
	 * @since 3.0.0
	 */
	protected function setup_nav() {
		$nav_items = array(
			'root'    => array(
				'name'                => __( 'Memberships', 'buddypress' ),
				'slug'                => $this->group->slug,
				'position'            => -1,
				/** This filter is documented in bp-groups/classes/class-bp-groups-component.php. */
				'default_subnav_slug' => apply_filters( 'bp_groups_default_extension', defined( 'BP_GROUPS_DEFAULT_EXTENSION' ) ? BP_GROUPS_DEFAULT_EXTENSION : 'home' ),
			),
			'home'    => array(
				'name'        => _x( 'Home', 'Group screen navigation title', 'buddypress' ),
				'slug'        => 'home',
				'parent_slug' => $this->group->slug,
				'position'    => 10,
			),
			'invites' => array(
				'name'        => _x( 'Invite', 'My Group screen nav', 'buddypress' ),
				'slug'        => 'send-invites',
				'parent_slug' => $this->group->slug,
				'position'    => 70,
			),
			'manage'  => array(
				'name'        => _x( 'Manage', 'My Group screen nav', 'buddypress' ),
				'slug'        => 'admin',
				'parent_slug' => $this->group->slug,
				'position'    => 1000,
			),
		);

		// Make sure only global front.php will be checked.
		add_filter( '_bp_nouveau_group_reset_front_template', array( $this, 'all_groups_fronts' ), 10, 1 );

		$front_template = bp_groups_get_front_template( $this->group );

		remove_filter( '_bp_nouveau_group_reset_front_template', array( $this, 'all_groups_fronts' ), 10, 1 );

		if ( ! $front_template ) {
			if ( bp_is_active( 'activity' ) ) {
				$nav_items['home']['name'] = _x( 'Home (Activity)', 'Group screen navigation title', 'buddypress' );
			} else {
				$nav_items['home']['name'] = _x( 'Home (Members)', 'Group screen navigation title', 'buddypress' );
			}
		} else {
			if ( bp_is_active( 'activity' ) ) {
				$nav_items['activity'] = array(
					'name'        => _x( 'Activity', 'My Group screen nav', 'buddypress' ),
					'slug'        => 'activity',
					'parent_slug' => $this->group->slug,
					'position'    => 11,
				);
			}

			// Add the members one
			$nav_items['members'] = array(
				'name'        => _x( 'Members', 'My Group screen nav', 'buddypress' ),
				'slug'        => 'members',
				'parent_slug' => $this->group->slug,
				'position'    => 60,
			);
		}

		// Required params
		$required_params = array(
			'slug'              => true,
			'name'              => true,
			'nav_item_position' => true,
		);

		// Now find nav items plugins are creating within their Group extensions!
		foreach ( get_declared_classes() as $class ) {
			if ( is_subclass_of( $class, 'BP_Group_Extension' ) ) {
				$extension = new $class;

				if ( ! empty( $extension->params ) && ! array_diff_key( $required_params, $extension->params ) ) {
					$nav_items[ $extension->params['slug'] ] = array(
						'name'        => $extension->params['name'],
						'slug'        => $extension->params['slug'],
						'parent_slug' => $this->group->slug,
						'position'    => $extension->params['nav_item_position'],
					);
				}
			}
		}

		// Now we got all, create the temporary nav.
		foreach ( $nav_items as $nav_item ) {
			$this->add_nav( $nav_item );
		}
	}

	/**
	 * Front template: do not look into group's template hierarchy.
	 *
	 * @since 3.0.0
	 *
	 * @param array $templates The list of possible group front templates.
	 *
	 * @return array The list of "global" group front templates.
	 */
	public function all_groups_fronts( $templates = array() ) {
		return array_intersect( array(
			'groups/single/front.php',
			'groups/single/default-front.php',
		), $templates );
	}

	/**
	 * Get the original order for the group navigation.
	 *
	 * @since 3.0.0
	 *
	 * @return array a list of nav items slugs ordered.
	 */
	public function get_default_value() {
		$default_nav = $this->get_secondary( array( 'parent_slug' => $this->group->slug ) );
		return wp_list_pluck( $default_nav, 'slug' );
	}

	/**
	 * Get the list of nav items ordered according to the Site owner preferences.
	 *
	 * @since 3.0.0
	 *
	 * @return array the nav items ordered.
	 */
	public function get_group_nav() {
		// Eventually reset the order
		bp_nouveau_set_nav_item_order( $this, bp_nouveau_get_appearance_settings( 'group_nav_order' ), $this->group->slug );

		return $this->get_secondary( array( 'parent_slug' => $this->group->slug ) );
	}
}