<?php

namespace Pods\Whatsit;

use Exception;
use Pods\Whatsit;

/**
 * Group class.
 *
 * @since 2.8.0
 */
class Group extends Whatsit {

	/**
	 * {@inheritdoc}
	 */
	protected static $type = 'group';

	/**
	 * {@inheritdoc}
	 */
	public function get_args() {
		$args = parent::get_args();

		// Groups have no group.
		unset( $args['group'] );

		return $args;
	}

	/**
	 * {@inheritdoc}
	 */
	public function get_fields( array $args = [] ) {
		if ( [] === $this->_fields ) {
			return [];
		}

		$api = pods_api();

		$has_custom_args = ! empty( $args );

		if ( null !== $this->_fields && ! $has_custom_args ) {
			$objects = $this->maybe_get_objects_by_identifier( $this->_fields, $args );

			if ( is_array( $objects ) ) {
				$this->_fields = pods_clone_objects( $objects );

				/** @var Field[] $objects */
				return $objects;
			}
		}

		$filtered_args = [
			'parent'            => $this->get_parent_id(),
			'parent_id'         => $this->get_parent_id(),
			'parent_name'       => $this->get_parent_name(),
			'parent_identifier' => $this->get_parent_identifier(),
			'group'             => $this->get_name(),
			'group_id'          => $this->get_id(),
			'group_name'        => $this->get_name(),
			'group_identifier'  => $this->get_identifier(),
		];

		if ( empty( $filtered_args['parent_id'] ) || empty( $filtered_args['group_id'] ) ) {
			$filtered_args['bypass_post_type_find'] = true;
		}

		$filtered_args = array_filter( $filtered_args );

		$args = array_merge( [
			'orderby'           => 'menu_order title',
			'order'             => 'ASC',
		], $filtered_args, $args );

		try {
			if ( empty( $args['parent_identifier'] ) && empty( $args['group_id'] ) ) {
				throw new Exception( 'Invalid parent identifier for field lookup by group not by ID: ' . var_export( $args, true ) );
			}

			if ( ! empty( $args['object_type'] ) ) {
				$objects = $api->_load_objects( $args );
			} else {
				$objects = $api->load_fields( $args );
			}
		} catch ( Exception $exception ) {
			pods_debug_log( $exception );

			$objects = [];
		}

		if ( ! $has_custom_args ) {
			$this->_fields = pods_clone_objects( $objects );
		}

		return $objects;
	}

	/**
	 * {@inheritdoc}
	 */
	public function get_groups( array $args = [] ) {
		// Groups do not support groups.
		return [];
	}

	/**
	 * {@inheritdoc}
	 */
	public function get_arg( $arg, $default = null, $strict = false, $raw = false ) {
		if ( $raw ) {
			return parent::get_arg( $arg, $default, $strict, $raw );
		}

		$arg = (string) $arg;

		$special_args = [
			// Pod args.
			'pod_id'             => 'get_parent_id',
			'pod'                => 'get_parent_name',
			'pod_name'           => 'get_parent_name',
			'pod_identifier'     => 'get_parent_identifier',
			'pod_label'          => 'get_parent_label',
			'pod_description'    => 'get_parent_description',
			'pod_object'         => 'get_parent_object',
			'pod_object_type'    => 'get_parent_object_type',
			'pod_object_storage_type'   => 'get_parent_object_storage_type',
			'pod_type'           => 'get_parent_type',
		];

		if ( isset( $special_args[ $arg ] ) ) {
			return $this->{$special_args[ $arg ]}();
		}

		return parent::get_arg( $arg, $default );
	}

}