<?php
/**
 * Utils.
 *
 * @package CARTFLOWS
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Class Cartflows_Utils.
 */
class Cartflows_Utils {

	/**
	 * Member Variable
	 *
	 * @var instance
	 */
	private static $instance;

	/**
	 *  Initiator
	 */
	public static function get_instance() {
		if ( ! isset( self::$instance ) ) {
			self::$instance = new self;
		}
		return self::$instance;
	}

	/**
	 *  Constructor
	 */
	function __construct() {
	}

	/**
	 *  Get current post type
	 *
	 * @param string $post_type post type.
	 * @return string
	 */
	function current_post_type( $post_type = '' ) {

		if ( '' === $post_type ) {
			$post_type = get_post_type();
		}

		return $post_type;
	}

	/**
	 * Check if post type is of step.
	 *
	 * @param string $post_type post type.
	 * @return bool
	 */
	function is_step_post_type( $post_type = '' ) {

		if ( $this->get_step_post_type() === $this->current_post_type( $post_type ) ) {

			return true;
		}

		return false;
	}

	/**
	 * Check if post type is of flow.
	 *
	 * @param string $post_type post type.
	 * @return bool
	 */
	function is_flow_post_type( $post_type = '' ) {

		if ( $this->get_flow_post_type() === $this->current_post_type( $post_type ) ) {

			return true;
		}

		return false;
	}

	/**
	 * Get post type of step.
	 *
	 * @return string
	 */
	function get_step_post_type() {

		return CARTFLOWS_STEP_POST_TYPE;
	}

	/**
	 * Get post type of flow.
	 *
	 * @return string
	 */
	function get_flow_post_type() {

		return CARTFLOWS_FLOW_POST_TYPE;
	}

	/**
	 * Get flow id
	 *
	 * @return int
	 */
	function get_flow_id() {

		global $post;

		return get_post_meta( $post->ID, 'wcf-flow-id', true );
	}

	/**
	 * Get flow id by step
	 *
	 * @param int $step_id step ID.
	 * @return int
	 */
	function get_flow_id_from_step_id( $step_id ) {

		return get_post_meta( $step_id, 'wcf-flow-id', true );
	}

	/**
	 * Get flow steps by id
	 *
	 * @param int $flow_id flow ID.
	 * @return int
	 */
	function get_flow_steps( $flow_id ) {

		$steps = get_post_meta( $flow_id, 'wcf-steps', true );

		if ( is_array( $steps ) && ! empty( $steps ) ) {
			return $steps;
		}

		return false;
	}

	/**
	 * Get template type of step
	 *
	 * @param int $step_id step ID.
	 * @return int
	 */
	function get_step_type( $step_id ) {

		return get_post_meta( $step_id, 'wcf-step-type', true );
	}

	/**
	 * Get next id for step
	 *
	 * @param int $flow_id flow ID.
	 * @param int $step_id step ID.
	 * @return bool
	 */
	function get_next_step_id( $flow_id, $step_id ) {

		$steps   = $this->get_flow_steps( $flow_id );
		$step_id = intval( $step_id );

		if ( ! $steps ) {
			return false;
		}

		foreach ( $steps as $i => $step ) {

			if ( intval( $step['id'] ) === $step_id ) {

				$next_i = $i + 1;

				if ( isset( $steps[ $next_i ] ) ) {

					$navigation = $steps[ $next_i ];

					return intval( $navigation['id'] );
				}

				break;
			}
		}

		return false;
	}

	/**
	 * Get next id for step
	 *
	 * @param int $order_id order ID.
	 * @return int
	 */
	function get_flow_id_from_order( $order_id ) {

		$flow_id = get_post_meta( $order_id, '_wcf_flow_id', true );

		return intval( $flow_id );
	}

	/**
	 * Get checkout id for order
	 *
	 * @param int $order_id order ID.
	 * @return int
	 */
	function get_checkout_id_from_order( $order_id ) {

		$checkout_id = get_post_meta( $order_id, '_wcf_checkout_id', true );

		return intval( $checkout_id );
	}

	/**
	 * We are using this function mostly in ajax on checkout page
	 *
	 * @return bool
	 */
	function get_checkout_id_from_post_data() {

		if ( isset( $_POST['_wcf_checkout_id'] ) ) {

			$checkout_id = filter_var( $_POST['_wcf_checkout_id'], FILTER_SANITIZE_NUMBER_INT );

			return intval( $checkout_id );
		}

		return false;
	}

	/**
	 * We are using this function mostly in ajax on checkout page
	 *
	 * @return bool
	 */
	function get_flow_id_from_post_data() {

		if ( isset( $_POST['_wcf_flow_id'] ) ) {

			$flow_id = filter_var( $_POST['_wcf_flow_id'], FILTER_SANITIZE_NUMBER_INT );

			return intval( $flow_id );
		}

		return false;
	}

	/**
	 * Check for thank you page
	 *
	 * @param int $step_id step ID.
	 * @return bool
	 */
	function check_is_thankyou_page( $step_id ) {

		$step_type = $this->get_step_type( $step_id );

		if ( 'thankyou' === $step_type ) {

			return true;
		}

		return false;
	}

	/**
	 * Check for offer page
	 *
	 * @param int $step_id step ID.
	 * @return bool
	 */
	function check_is_offer_page( $step_id ) {

		$step_type = $this->get_step_type( $step_id );

		if ( 'upsell' === $step_type || 'downsell' === $step_type ) {

			return true;
		}

		return false;
	}

	/**
	 * Define constant for cache
	 *
	 * @return void
	 */
	function do_not_cache() {

		wc_maybe_define_constant( 'DONOTCACHEPAGE', true );
		wc_maybe_define_constant( 'DONOTCACHEOBJECT', true );
		wc_maybe_define_constant( 'DONOTCACHEDB', true );

		nocache_headers();
	}

	/**
	 * Get linking url
	 *
	 * @param array $args query args.
	 * @return string
	 */
	function get_linking_url( $args = array() ) {

		$url = get_home_url();

		$url = add_query_arg( $args, $url );

		return $url;
	}
}

/**
 * Get a specific property of an array without needing to check if that property exists.
 *
 * Provide a default value if you want to return a specific value if the property is not set.
 *
 * @param array  $array   Array from which the property's value should be retrieved.
 * @param string $prop    Name of the property to be retrieved.
 * @param string $default Optional. Value that should be returned if the property is not set or empty. Defaults to null.
 *
 * @return null|string|mixed The value
 */
function wcf_get_prop( $array, $prop, $default = null ) {

	if ( ! is_array( $array ) && ! ( is_object( $array ) && $array instanceof ArrayAccess ) ) {
		return $default;
	}

	if ( isset( $array[ $prop ] ) ) {
		$value = $array[ $prop ];
	} else {
		$value = '';
	}

	return empty( $value ) && null !== $default ? $default : $value;
}