class Checkout
{
    /**
     * Registers hooks
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return void
     */
    public static function init() {
        // set priority to 20 so inventory is updated last
        add_action('usces_action_reg_orderdata', [get_class(), 'updateInventoryOnPurchase'], 20, 1);
        add_action('usces_action_reg_ordercart_row', [get_class(), 'addGroupItemsToOrderCart'], 10, 4);
    }

    /**
     * Updates inventory on purchase for each combo-set group item
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @param array $args
     * @return void
     */
    public static function updateInventoryOnPurchase($args) {
        global $usces;

        $items = $args['cart'];
        foreach ($items as $index => $item) {
            $sels = unserialize($item['serial']);
            // combo-set ID not set, continue
            if (empty($sels['comboSetId'])) {
                continue;
            }
            // combo-set group items not set, continue
            if (!isset($sels['comboSetItems'])) {
                continue;
            }

            // make each group item quantity the same as the combo-set item quant
            foreach ($sels['comboSetItems'] as $serial => $gitem) {
                $sels['comboSetItems'][$serial]['quant'] = (int)$gitem['quant'] * $item['quantity'];
            }
            $realcart = $_SESSION['usces_cart'];
            $_SESSION['usces_cart'] = $sels['comboSetItems'];
            // loop combo-set group items and update inventory for each one
            usces_action_reg_orderdata_stocks(['cart' => $usces->cart->get_cart()]);
            $_SESSION['usces_cart'] = $realcart;
        }
    }

    /**
     * Registers group items in group items ordercart table if the cart item is a combo-set
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @param int   $cart_id
     * @param int   $row_index
     * @param array $value
     * @param array $args
     * @return void
     */
    public static function addGroupItemsToOrderCart($cart_id, $row_index, $value, $args) {
        global $usces;

        $sels = unserialize($value['serial']);
        // combo-set ID not set, continue
        if (empty($sels['comboSetId'])) {
            return;
        }
        // combo-set group items not set, continue
        if (!isset($sels['comboSetItems'])) {
            return;
        }

        $realcart = $_SESSION['usces_cart'];
        $_SESSION['usces_cart'] = $sels['comboSetItems'];
        foreach ($usces->cart->get_cart() as $index => $gitem) {
            $gisels = unserialize($gitem['serial']);
            $group = ComboGroup::getComboGroupById($gisels['groupId']);
            $item = GroupItem::getGroupItemById($gisels['itemId']);
            $groupLabel = '';
            $itemLabel = '';
            if ($group !== null) {
                $groupLabel = $group->getLabel();
            }
            if ($item !== null) {
                $itemLabel = $item->getItemLabel();
            }
            $gisels['groupLabel'] = $groupLabel;
            $gisels['itemLabel'] = $itemLabel;
            $gitem['serial'] = serialize($gisels);

            self::registerOrderCartDataForGroupItem($cart_id, (int)$args['order_id'], $gitem, $index);
        }
        $_SESSION['usces_cart'] = $realcart;
    }

    /**
     * Registers group item data in group items ordercart table and ordercart meta table
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \wpdb $wpdb
     * @global \usc_e_shop $usces
     * @param int   $combo_set_cart_id
     * @param int   $order_id
     * @param array $value This is the group item cart
     * @param int   $row_index
     * @return void
     */
    public static function registerOrderCartDataForGroupItem($combo_set_cart_id, $order_id, $value, $row_index) {
        global $wpdb, $usces;

        $cart_table = Schema::getComboSetGroupItemsOrderCartTable();
        $cart_meta_table = Schema::getComboSetGroupItemsOrderCartMetaTable();
        $post_id = (int)$value['post_id'];
        $product = wel_get_product($post_id, false);
        $item_code = $product['itemCode'];
        $item_name = $product['itemName'];
        $skus = $usces->get_skus($value['post_id'], 'code', false);
        $sku_encoded = $value['sku'];
        $skucode = urldecode($value['sku']);
        $sku = $skus[$skucode];
        $tax = 0;
        $query = $wpdb->prepare(
            "INSERT INTO $cart_table 
			(
            combo_set_cart_id, order_id, row_index, post_id, item_code, item_name, 
			sku_code, sku_name, cprice, price, quantity, 
			unit, tax, destination_id, cart_serial 
			) VALUES (
            %d, %d, %d, %d, %s, %s, 
			%s, %s, %f, %f, %f, 
			%s, %d, %d, %s 
			)",
            $combo_set_cart_id,
            $order_id,
            $row_index,
            $post_id,
            $item_code,
            $item_name,
            $skucode,
            $sku['name'],
            $sku['cprice'],
            $value['price'],
            $value['quantity'],
            $sku['unit'],
            $tax,
            null,
            $value['serial']
        );
        $wpdb->query($query);

        $cart_id = $wpdb->insert_id;
        $opt_fields = wel_get_opts($post_id, 'sort', false);

        if ($value['options']) {
            foreach ((array)$opt_fields as $okey => $val) {
                $enc_key = urlencode($val['name']);
                $means = $opt_fields[$okey]['means'];

                if (3 === (int)$means) {
                    if ('' == $value['options'][$enc_key]) {
                        $ovalue = $value['options'][$enc_key];
                    } else {
                        $ovalue = urldecode($value['options'][$enc_key]);
                    }
                } elseif (4 === (int)$means) {
                    if (is_array($value['options'][$enc_key])) {
                        $temp = [];
                        foreach ($value['options'][$enc_key] as $v) {
                            $temp[] = urldecode($v);
                        }
                        $ovalue = serialize($temp);
                    } elseif ('' == $value['options'][$enc_key]) {
                        $ovalue = $value['options'][$enc_key];
                    } else {
                        $ovalue = urldecode($value['options'][$enc_key]);
                    }
                } else {
                    if (is_array($value['options'][$enc_key])) {
                        $temp = [];
                        foreach ($value['options'][$enc_key] as $k => $v) {
                            $temp[$k] = urldecode($v);
                        }
                        $ovalue = serialize($temp);
                    } else {
                        $ovalue = urldecode($value['options'][$enc_key]);
                    }
                }
                $wpdb->query(
                    $wpdb->prepare(
                        "INSERT INTO {$cart_meta_table} 
						( cart_id, meta_type, meta_key, meta_value ) VALUES (%d, %s, %s, %s)",
                        $cart_id,
                        'option',
                        $val['name'],
                        $ovalue
                    )
                );
            }
        }

        if ($value['advance']) {
            foreach ((array)$value['advance'] as $akey => $avalue) {
                $advance = $usces->cart->wc_unserialize($avalue);

                if (is_array($advance)) {
                    if (isset($advance[$post_id][$sku_encoded]) && is_array($advance[$post_id][$sku_encoded])) {
                        $akeys = array_keys($advance[$post_id][$sku_encoded]);

                        foreach ((array)$akeys as $akey) {
                            if (is_array($advance[$post_id][$sku_encoded][$akey])) {
                                $avalue = serialize($advance[$post_id][$sku_encoded][$akey]);
                            } else {
                                $avalue = $advance[$post_id][$sku_encoded][$akey];
                            }
                            $wpdb->query(
                                $wpdb->prepare(
                                    "INSERT INTO {$cart_meta_table} 
									( cart_id, meta_type, meta_key, meta_value ) VALUES ( %d, 'advance', %s, %s )",
                                    $cart_id,
                                    $akey,
                                    $avalue
                                )
                            );
                        }
                    } else {
                        $akeys = array_keys($advance);
                        $akey = empty($akeys[0]) ? 'advance' : $akeys[0];
                        $avalue = serialize($advance);
                        $wpdb->query(
                            $wpdb->prepare(
                                "INSERT INTO {$cart_meta_table} 
								( cart_id, meta_type, meta_key, meta_value ) VALUES ( %d, 'advance', %s, %s )",
                                $cart_id,
                                $akey,
                                $avalue
                            )
                        );
                    }
                } else {
                    $avalue = urldecode($avalue);
                    $wpdb->query(
                        $wpdb->prepare(
                            "INSERT INTO {$cart_meta_table} 
							( cart_id, meta_type, meta_key, meta_value ) VALUES ( %d, 'advance', %s, %s )",
                            $cart_id,
                            $akey,
                            $avalue
                        )
                    );
                }
            }
        }

        if ($usces->is_reduced_taxrate()) {
            if (isset($sku['taxrate']) && 'reduced' == $sku['taxrate']) {
                $tkey = 'reduced';
                $tvalue = $usces->options['tax_rate_reduced'];
            } else {
                $tkey = 'standard';
                $tvalue = $usces->options['tax_rate'];
            }
            $wpdb->query(
                $wpdb->prepare(
                    "INSERT INTO {$cart_meta_table} 
					( cart_id, meta_type, meta_key, meta_value ) VALUES ( %d, 'taxrate', %s, %s )",
                    $cart_id,
                    $tkey,
                    $tvalue
                )
            );
        }
    }
}