<?php
/**
 * Amount Left for Free Shipping for WooCommerce - Functions
 *
 * @version 1.0.0
 * @since   1.0.0
 * @author  Algoritmika Ltd.
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if ( ! function_exists( 'alg_get_left_to_free_shipping' ) ) {
	/*
	 * alg_get_left_to_free_shipping.
	 *
	 * @version 1.0.0
	 * @since   1.0.0
	 * @return  string
	 */
	function alg_get_left_to_free_shipping( $content, $multiply_by = 1 ) {
		if ( '' == $content ) {
			$content = __( '%amount_left_for_free_shipping% left for free shipping', 'left-to-free-shipping-for-woocommerce' );
		}
		$min_free_shipping_amount = 0;
		$current_wc_version = get_option( 'woocommerce_version', null );
		if ( version_compare( $current_wc_version, '2.6.0', '<' ) ) {
			$free_shipping = new WC_Shipping_Free_Shipping();
			if ( in_array( $free_shipping->requires, array( 'min_amount', 'either', 'both' ) ) ) {
				$min_free_shipping_amount = $free_shipping->min_amount;
			}
		} else {
			$legacy_free_shipping = new WC_Shipping_Legacy_Free_Shipping();
			if ( 'yes' === $legacy_free_shipping->enabled ) {
				if ( in_array( $legacy_free_shipping->requires, array( 'min_amount', 'either', 'both' ) ) ) {
					$min_free_shipping_amount = $legacy_free_shipping->min_amount;
				}
			}
			if ( 0 == $min_free_shipping_amount ) {
				if ( function_exists( 'WC' ) && ( $wc_shipping = WC()->shipping ) && ( $wc_cart = WC()->cart ) ) {
					if ( $wc_shipping->enabled ) {
						if ( $packages = $wc_cart->get_shipping_packages() ) {
							$shipping_methods = $wc_shipping->load_shipping_methods( $packages[0] );
							foreach ( $shipping_methods as $shipping_method ) {
								if ( 'yes' === $shipping_method->enabled && 0 != $shipping_method->instance_id ) {
									if ( 'WC_Shipping_Free_Shipping' === get_class( $shipping_method ) ) {
										if ( in_array( $shipping_method->requires, array( 'min_amount', 'either', 'both' ) ) ) {
											$min_free_shipping_amount = $shipping_method->min_amount;
											break;
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if ( 0 != $min_free_shipping_amount ) {
			if ( isset( WC()->cart->cart_contents_total ) ) {
				$total = ( WC()->cart->prices_include_tax ) ? WC()->cart->cart_contents_total + array_sum( WC()->cart->taxes ) : WC()->cart->cart_contents_total;
				if ( $total >= $min_free_shipping_amount ) {
					return do_shortcode( get_option( 'alg_wc_left_to_free_shipping_info_content_reached', __( 'You have free delivery!', 'left-to-free-shipping-for-woocommerce' ) ) );
				} else {
					$content = str_replace( '%amount_left_for_free_shipping%',             wc_price( ( $min_free_shipping_amount - $total ) * $multiply_by ), $content );
					$content = str_replace( '%free_shipping_min_amount%', wc_price( ( $min_free_shipping_amount )          * $multiply_by ), $content );
					return $content;
				}
			}
		}
	}
}

if ( ! function_exists( 'alg_get_left_to_free_shipping_shortcode_function' ) ) {
	/*
	 * alg_get_left_to_free_shipping_shortcode_function.
	 *
	 * @version 1.0.0
	 * @since   1.0.0
	 */
	function alg_get_left_to_free_shipping_shortcode_function( $atts, $content ) {
		$atts = shortcode_atts( array( 'content' => '', 'multiply_by' => 1 ), $atts, 'alg_get_left_to_free_shipping' );
		return alg_get_left_to_free_shipping( $atts['content'], $atts['multiply_by'] );
	}
}
add_shortcode( 'alg_get_left_to_free_shipping', 'alg_get_left_to_free_shipping_shortcode_function' );