<?php

/**
 * DHL checkout Extend WC Core.
 */
if (! class_exists('PR_DHL_Extend_Block_core')) {

    class PR_DHL_Extend_Block_core
    {
        /**
         * Plugin Identifier, unique to each plugin.
         *
         * @var string
         */
        private $name = 'pr-dhl';

        /**
         * Bootstraps the class and hooks required data.
         */
        public function __construct()
        {
            add_action('woocommerce_store_api_checkout_update_order_from_request', [
                $this,
                'save_dhl_checkout_fields',
            ], 10, 2);

            // Register the update callback when WooCommerce Blocks is loaded
            add_action('init', [$this, 'register_store_api_callback']);

            // Register fee calculation
            add_action('woocommerce_cart_calculate_fees', [$this, 'add_preferred_day_fee']);

        }

        /**
         * Saves the dhl fields to the order's metadata.
         *
         * @return void
         */
        public function save_dhl_checkout_fields(WC_Order $order, WP_REST_Request $request)
        {
            $pr_dhl_request_data = isset($request['extensions'][$this->name]) ? $request['extensions'][$this->name] : [];
            $dhl_label_options = [];
            if (! empty($pr_dhl_request_data['preferredDay'])) {
                $dhl_label_options['pr_dhl_preferred_day'] = wc_clean($pr_dhl_request_data['preferredDay']);
            }

            $settings = PR_DHL()->get_shipping_dhl_settings();
            $has_location = ! empty($settings['dhl_preferred_location']) && $settings['dhl_preferred_location'] === 'yes';
            $has_neighbor = ! empty($settings['dhl_preferred_neighbour']) && $settings['dhl_preferred_neighbour'] === 'yes';
            $both_enabled = $has_location && $has_neighbor;

            $dropp_off_choice = isset($pr_dhl_request_data['preferredLocationNeighbor'])
                ? wc_clean($pr_dhl_request_data['preferredLocationNeighbor'])
                : '';
            $dropp_off_choice = in_array($dropp_off_choice, [
                'none',
                'location',
                'neighbor',
            ], true) ? $dropp_off_choice : '';

            if ($both_enabled) {

                if ($dropp_off_choice === 'location') {
                    $loc = isset($pr_dhl_request_data['preferredLocation']) ? trim($pr_dhl_request_data['preferredLocation']) : '';
                    if ($loc === '') {
                        throw new Exception(__('Please enter the preferred location.', 'dhl-for-woocommerce'));
                    }
                    $dhl_label_options['pr_dhl_preferred_location_neighbor'] = 'location';
                    $dhl_label_options['pr_dhl_preferred_location'] = wc_clean($loc);

                } elseif ($dropp_off_choice === 'neighbor') {
                    $nm = isset($pr_dhl_request_data['preferredNeighborName']) ? trim($pr_dhl_request_data['preferredNeighborName']) : '';
                    $adr = isset($pr_dhl_request_data['preferredNeighborAddress']) ? trim($pr_dhl_request_data['preferredNeighborAddress']) : '';
                    if ($nm === '' || $adr === '') {
                        throw new Exception(__('Please enter the preferred neighbor name and address.', 'dhl-for-woocommerce'));
                    }
                    $dhl_label_options['pr_dhl_preferred_location_neighbor'] = 'neighbor';
                    $dhl_label_options['pr_dhl_preferred_neighbour_name'] = wc_clean($nm);
                    $dhl_label_options['pr_dhl_preferred_neighbour_address'] = wc_clean($adr);
                }

            } else {

                if ($has_location) {
                    $loc = isset($pr_dhl_request_data['preferredLocation']) ? trim($pr_dhl_request_data['preferredLocation']) : '';
                    if ($loc !== '') {
                        $dhl_label_options['pr_dhl_preferred_location_neighbor'] = 'location';
                        $dhl_label_options['pr_dhl_preferred_location'] = wc_clean($loc);
                    }
                } elseif ($has_neighbor) {
                    $nm = isset($pr_dhl_request_data['preferredNeighborName']) ? trim($pr_dhl_request_data['preferredNeighborName']) : '';
                    $adr = isset($pr_dhl_request_data['preferredNeighborAddress']) ? trim($pr_dhl_request_data['preferredNeighborAddress']) : '';
                    if ($nm !== '' || $adr !== '') {
                        if ($nm === '' || $adr === '') {
                            throw new Exception(__('Please enter the preferred neighbor name and address.', 'dhl-for-woocommerce'));
                        }
                        $dhl_label_options['pr_dhl_preferred_location_neighbor'] = 'neighbor';
                        $dhl_label_options['pr_dhl_preferred_neighbour_name'] = wc_clean($nm);
                        $dhl_label_options['pr_dhl_preferred_neighbour_address'] = wc_clean($adr);
                    }
                }
            }

            if (! empty($pr_dhl_request_data['closest_drop_point'])) {
                $dhl_label_options['pr_dhl_cdp_delivery'] = wc_clean($pr_dhl_request_data['closest_drop_point']);
            }

            if (! empty($dhl_label_options)) {
                PR_DHL()->get_pr_dhl_wc_order()->save_dhl_label_items($order->get_id(), $dhl_label_options);
            }

            // The Post Number only applies to Packstation / Postfiliale deliveries. Persist it only
            // when the address type or the shipping address itself is a droppoint; otherwise drop any
            // stale value so a Regular Address never carries a Post Number to the DHL API. Mirrors the
            // classic checkout's clear_post_number_for_regular_address().
            $address_type = isset($pr_dhl_request_data['addressType']) ? wc_clean($pr_dhl_request_data['addressType']) : '';
            $shipping_postnum = isset($pr_dhl_request_data['postNumber']) ? sanitize_text_field($pr_dhl_request_data['postNumber']) : '';
            $shipping_address_1 = $order->get_shipping_address_1();

            if (PR_DHL()->is_droppoint($address_type, $shipping_address_1)) {
                $order->update_meta_data('_shipping_dhl_postnum', $shipping_postnum);
            } else {
                $order->delete_meta_data('_shipping_dhl_postnum');
            }

            // Save the order to persist changes.
            $order->save();

        }

        /**
         * Register the update callback with WooCommerce Store API
         */
        public function register_store_api_callback()
        {
            if (function_exists('woocommerce_store_api_register_update_callback')) {
                woocommerce_store_api_register_update_callback(
                    [
                        'namespace' => $this->name,
                        'callback' => [$this, 'store_api_callback'],
                    ]
                );
            }
        }

        /**
         * Callback function for the Store API update
         *
         * @param  array  $data  Data sent from the client.
         */
        public function store_api_callback($data)
        {
            if (isset($data['action']) && $data['action'] === 'update_preferred_day_fee') {
                $price = isset($data['price']) ? floatval($data['price']) : 0;
                $label = isset($data['label']) ? sanitize_text_field($data['label']) : '';

                if ($price > 0 && $label !== '') {
                    // Store the fee amount and label in session
                    WC()->session->set('pr_dhl_preferred_day_fee', $price);
                    WC()->session->set('pr_dhl_preferred_day_label', $label);
                } else {
                    WC()->session->__unset('pr_dhl_preferred_day_fee');
                    WC()->session->__unset('pr_dhl_preferred_day_label');
                }
            } else {

                WC()->session->__unset('pr_dhl_preferred_day_fee');
                WC()->session->__unset('pr_dhl_preferred_day_label');
            }
        }

        /**
         * Adds the preferred day fee to the WooCommerce cart.
         *
         * @param  WC_Cart  $cart  The WooCommerce cart object.
         */
        public function add_preferred_day_fee($cart)
        {
            if (is_admin() && ! defined('DOING_AJAX')) {
                return;
            }
            if (! $cart->needs_shipping()) {
                WC()->session->__unset('pr_dhl_preferred_day_fee');
                WC()->session->__unset('pr_dhl_preferred_day_label');

                return;
            }
            // Get the fee amount and label from session
            $fee_amount = WC()->session->get('pr_dhl_preferred_day_fee', 0);
            $fee_label = WC()->session->get('pr_dhl_preferred_day_label', '');

            // Remove existing DHL fees if they exist
            $new_fees = [];
            foreach ($cart->get_fees() as $fee) {
                if (strpos($fee->name, 'DHL') === false) {
                    $new_fees[] = $fee;
                }
            }
            $cart->fees_api()->set_fees($new_fees);

            if ($fee_amount > 0 && ! empty($fee_label)) {
                // Add the fee to the cart
                $cart->add_fee($fee_label, $fee_amount, true, '');
            }
        }
    }

}