<?php

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

/**
 * Implements admin features of YITH WooCommerce Subscription
 *
 * @class   YITH_WC_Subscription
 * @package YITH WooCommerce Subscription
 * @since   1.0.0
 * @author  YITH
 */
if ( ! class_exists( 'YITH_WC_Subscription' ) ) {

	class YITH_WC_Subscription {

		/**
		 * Single instance of the class
		 *
		 * @var \YITH_WC_Subscription
		 */
		protected static $instance;

		/**
		 * Post name of subscription
		 *
		 * @var string
		 */
		public $post_name = 'ywsbs_subscription';

		/**
		 * Returns single instance of the class
		 *
		 * @return \YITH_WC_Subscription
		 * @since 1.0.0
		 */
		public static function get_instance() {
			if ( is_null( self::$instance ) ) {
				self::$instance = new self();
			}
			return self::$instance;
		}

		/**
		 * Constructor
		 *
		 * Initialize plugin and registers actions and filters to be used
		 *
		 * @since  1.0.0
		 * @author Emanuela Castorina
		 */
		public function __construct() {
			add_action( 'plugins_loaded', array( $this, 'plugin_fw_loader' ), 15 );

			if ( get_option( 'ywsbs_enabled' ) != 'yes' ) {
				return;
			}

			/* general actions */
			add_filter( 'woocommerce_locate_core_template', array( $this, 'filter_woocommerce_template' ), 10, 3 );
			add_filter( 'woocommerce_locate_template', array( $this, 'filter_woocommerce_template' ), 10, 3 );

			/*Register custom post type YWSBS_Subscription */

			YWSBS_Subscription_Helper();
			YWSBS_Subscription_Cron();
			YWSBS_Subscription_Order();
			YWSBS_Subscription_Cart();
			YWSBS_Subscription_Paypal();

			yith_check_privacy_enabled() && YWSBS_Subscription_Privacy( true );
			// Change product prices
			add_filter( 'woocommerce_get_price_html', array( $this, 'change_price_html' ), 10, 2 );

			add_filter( 'woocommerce_order_formatted_line_subtotal', array( $this, 'order_formatted_line_subtotal' ), 10, 3 );

			// Ensure a subscription is never in the cart with products
			add_filter( 'woocommerce_add_to_cart_validation', array( $this, 'cart_item_validate' ), 10, 3 );

		}

		/**
		 * Load YIT Plugin Framework
		 *
		 * @since  1.0.0
		 * @return void
		 * @author Emanuela Castorina
		 */
		public function plugin_fw_loader() {
			if ( ! defined( 'YIT_CORE_PLUGIN' ) ) {
				global $plugin_fw_data;
				if ( ! empty( $plugin_fw_data ) ) {
					$plugin_fw_file = array_shift( $plugin_fw_data );
					require_once $plugin_fw_file;
				}
			}
		}

		/**
		 * Locate default templates of woocommerce in plugin, if exists
		 *
		 * @param $core_file     string
		 * @param $template      string
		 * @param $template_base string
		 *
		 * @return string
		 * @since  1.0.0
		 */
		public function filter_woocommerce_template( $core_file, $template, $template_base ) {

			$located = yith_ywsbs_locate_template( $template );

			if ( $located ) {
				return $located;
			} else {
				return $core_file;
			}
		}

		/**
		 * @param $price
		 * @param $product
		 *
		 * @return string
		 */
		public function change_price_html( $price, $product ) {

			if ( ! $this->is_subscription( $product->get_id() ) ) {
				return $price;
			}

			$price_is_per             = yit_get_prop( $product, '_ywsbs_price_is_per' );
			$price_time_option        = yit_get_prop( $product, '_ywsbs_price_time_option' );
			$price_time_option_string = ywsbs_get_price_per_string( $price_is_per, $price_time_option );

			$price .= ' / ' . $price_time_option_string;

			return $price;

		}

		/**
		 * @param $product
		 *
		 * @return bool
		 * @internal param $product_id
		 */
		public function is_subscription( $product ) {
			if ( is_numeric( $product ) ) {
				$product = wc_get_product( $product );
			}

			$is_subscription = yit_get_prop( $product, '_ywsbs_subscription' );
			$price_is_per    = yit_get_prop( $product, '_ywsbs_price_is_per' );

			return apply_filters( 'ywsbs_is_subscription', ( $is_subscription == 'yes' && $price_is_per != '' ) ? true : false, $product->get_id() );
		}

		/**
		 * Check if in the cart there are subscription that needs shipping
		 *
		 * @return bool
		 * @since  1.0.0
		 */
		public function cart_has_subscription_with_shipping() {

			$cart_has_subscription_with_shipping = false;

			$cart_contents = WC()->cart->get_cart();

			if ( ! isset( $cart_contents ) || empty( $cart_contents ) ) {
				return $cart_has_subscription_with_shipping;
			}

			foreach ( $cart_contents as $cart_item ) {
				$product = $cart_item['data'];
				if ( $this->is_subscription( $product->id ) && $product->needs_shipping() ) {
					$cart_has_subscription_with_shipping = true;
				}
			}

			return apply_filters( 'ywsbs_cart_has_subscription_with_shipping', $cart_has_subscription_with_shipping );

		}

		/**
		 * @param $valid
		 * @param $product_id
		 * @param $quantity
		 *
		 * @return mixed
		 */
		public function cart_item_validate( $valid, $product_id, $quantity ) {
			if ( $this->is_subscription( $product_id ) && $item_key = $this->cart_has_subscriptions() ) {
				$this->clean_cart_from_subscriptions( $item_key );
				$message = __( 'A subscription has been removed from your cart. You cannot purchases different subscriptions at the same time.', 'yith-woocommerce-subscription' );
				wc_add_notice( $message, 'notice' );
			}

			return $valid;
		}

		/**
		 * Removes all subscription products from the shopping cart.
		 *
		 * @since 1.0
		 */
		public function clean_cart_from_subscriptions( $item_key ) {
			WC()->cart->set_quantity( $item_key, 0 );
		}

		/**
		 * Check if in the cart there are subscription
		 *
		 * @return bool/int
		 * @since  1.0.0
		 */
		public function cart_has_subscriptions() {
			$contents = WC()->cart->cart_contents;
			if ( ! empty( $contents ) ) {
				foreach ( $contents as $item_key => $item ) {
					if ( $this->is_subscription( $item['product_id'] ) ) {
						return $item_key;
					}
				}
			}

			return false;
		}

		/**
		 * @param $subtotal
		 * @param $item
		 * @param $order
		 *
		 * @return string
		 */
		public function order_formatted_line_subtotal( $subtotal, $item, $order ) {

			$product_id = $item['product_id'];
			$product    = wc_get_product( $product_id );

			if ( ! $this->is_subscription( $product ) ) {
				return $subtotal;
			}

			$price_is_per             = yit_get_prop( $product, '_ywsbs_price_is_per' );
			$price_time_option        = yit_get_prop( $product, '_ywsbs_price_time_option' );
			$price_time_option_string = ywsbs_get_price_per_string( $price_is_per, $price_time_option );
			$subtotal                .= ' / ' . $price_time_option_string;

			return apply_filters( 'ywsbs_order_formatted_line_subtotal', $subtotal, $item, $this, $product );

		}

		/**
		 * Check if in the order there are subscription
		 *
		 * @param  $order_id int
		 *
		 * @return bool
		 * @since  1.0.0
		 */
		public function order_has_subscription( $order_id ) {

			$order       = wc_get_order( $order_id );
			$order_items = $order->get_items();

			if ( empty( $order_items ) ) {
				return false;
			}

			foreach ( $order_items as $key => $order_item ) {
				$id = ( $order_item['variation_id'] ) ? $order_item['variation_id'] : $order_item['product_id'];

				if ( YITH_WC_Subscription()->is_subscription( $id ) ) {
					return true;
				}
			}

			return false;
		}
	}


}

/**
 * Unique access to instance of YITH_WC_Subscription class
 *
 * @return \YITH_WC_Subscription
 */
function YITH_WC_Subscription() {
	return YITH_WC_Subscription::get_instance();
}