<?php
namespace AISP_OTOOLS;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

add_action( 'woocommerce_shipping_init', __NAMESPACE__ . '\aisp_otools_admin_shipping_method_init' );

function aisp_otools_admin_shipping_method_init() {

	if ( class_exists( 'AISP_OTOOLS\Admin_Shipping_Method' ) ) {
		return;
	}

	class Admin_Shipping_Method extends \WC_Shipping_Method {

		public function __construct( $instance_id = 0 ) {

			$this->id          = 'aisp_admin_shipping';
			$this->instance_id = absint( $instance_id );

			$this->method_title       = __( 'Admin Shipping (Order Tools)', 'aisp-order-tools-for-woocommerce' );
			$this->method_description = __( 'Admin-only shipping method using zone-defined pricing.', 'aisp-order-tools-for-woocommerce' );

			$this->supports = array(
				'shipping-zones',
				'instance-settings',
			);

			$this->init();
		}

		public function init() {
			$this->init_form_fields();
			$this->init_settings();

			$this->enabled    = $this->get_option( 'method_enabled', 'yes' );
			$this->title      = $this->get_option( 'title', __( 'Admin Shipping', 'aisp-order-tools-for-woocommerce' ) );
			$this->tax_status = $this->get_option( 'tax_status', 'taxable' );

			add_action(
				'woocommerce_update_options_shipping_' . $this->id,
				array( $this, 'process_admin_options' )
			);
		}

		public function init_form_fields() {
			$this->instance_form_fields = array(
				'method_enabled' => array(
					'title'   => __( 'Enable/Disable', 'aisp-order-tools-for-woocommerce' ),
					'type'    => 'checkbox',
					'label'   => __( 'Enable this shipping method', 'aisp-order-tools-for-woocommerce' ),
					'default' => 'yes',
				),
				'title'          => array(
					'title'       => __( 'Method title', 'aisp-order-tools-for-woocommerce' ),
					'type'        => 'text',
					'default'     => __( 'Admin Shipping', 'aisp-order-tools-for-woocommerce' ),
					'description' => __( 'Label shown to administrators at checkout.', 'aisp-order-tools-for-woocommerce' ),
				),
				'cost'           => array(
					'title'             => __( 'Default cost', 'aisp-order-tools-for-woocommerce' ),
					'type'              => 'number',
					'default'           => '0',
					'description'       => __( 'Shipping price for this zone.', 'aisp-order-tools-for-woocommerce' ),
					'desc_tip'          => true,
					'custom_attributes' => array(
						'step' => '0.01',
						'min'  => '0',
					),
				),
				'tax_status'     => array(
					'title'   => __( 'Tax status', 'aisp-order-tools-for-woocommerce' ),
					'type'    => 'select',
					'default' => 'taxable',
					'options' => array(
						'taxable' => __( 'Taxable', 'aisp-order-tools-for-woocommerce' ),
						'none'    => __( 'None', 'aisp-order-tools-for-woocommerce' ),
					),
				),
			);
		}

		public function process_admin_options() {
			parent::process_admin_options();
		}

		public function calculate_shipping( $package = array() ) {

			if ( ! current_user_can( 'manage_woocommerce' ) ) {
				return;
			}

			$cost = floatval( $this->get_option( 'cost', 0 ) );

			$rate = array(
				'id'    => $this->get_rate_id(),
				'label' => $this->title,
				'cost'  => $cost,
			);

			if ( 'none' === $this->tax_status ) {
				$rate['taxes'] = array();
			}

			$this->add_rate( $rate );
		}
	}
}

add_filter( 'woocommerce_shipping_methods', __NAMESPACE__ . '\aisp_otools_register_admin_shipping_method' );

function aisp_otools_register_admin_shipping_method( $methods ) {
	$methods['aisp_admin_shipping'] = 'AISP_OTOOLS\Admin_Shipping_Method';
	return $methods;
}

add_filter( 'woocommerce_package_rates', __NAMESPACE__ . '\aisp_otools_hide_admin_shipping_from_customers', 20 );

function aisp_otools_hide_admin_shipping_from_customers( $rates ) {
	if ( current_user_can( 'manage_woocommerce' ) ) {
		return $rates;
	}

	foreach ( $rates as $key => $rate ) {
		if ( isset( $rate->method_id ) && 'aisp_admin_shipping' === $rate->method_id ) {
			unset( $rates[ $key ] );
		}
	}

	return $rates;
}