class Request
{
    /**
     * Name3 from SESSION if set or POST
     *
     * @var string
     */
    public $name3;

    /**
     * Name4 from SESSION if set or POST
     *
     * @var string
     */
    public $name4;

    /**
     * Settlement module
     *
     * @var LinePay
     */
    private $module;

    /**
     * Inject `LinePay` module
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param LinePay $module
     */
    public function __construct(LinePay $module) {
        $this->module = $module;
    }

    /**
     * Returns error if name3 and name4 are not set in SESSION and not set in POST
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return Closure&#Function#850928c3
     */
    public function furiganaCheckMiddleware() {
        return function ($args, $payload) {
            if (usces_have_shipped() === false) {
                return;
            }
            $del = $_SESSION['usces_entry']['delivery'];
            if (strtoupper($del['country']) === 'JP') {
                $name3 = isset($del['name3']) ? $del['name3'] : '';
                $name4 = isset($del['name4']) ? $del['name4'] : '';
                $this->name3 = $name3;
                $this->name4 = $name4;
                if (empty($name3) || empty($name4)) {
                    if (empty($payload) || !isset($payload)) {
                        return $this->module->clientErrorStore->getErrorResponse(ErrorCodes::FURIGANA_NAMES_REQUIRED);
                    }
                    $input_name3 = isset($payload['name3']) ? $payload['name3'] : '';
                    $input_name4 = isset($payload['name4']) ? $payload['name4'] : '';
                    if (empty($input_name3) || empty($input_name4)) {
                        return $this->module->clientErrorStore->getErrorResponse(ErrorCodes::FURIGANA_NAMES_REQUIRED);
                    }

                    // we set our member variables here because updating $_SESSION directly
                    // causes an automatic redirect to the cart page :/
                    $this->name3 = $input_name3;
                    $this->name4 = $input_name4;
                }
            }
        };
    }

    /**
     * Returns error if total price is 0 or less
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return Closure&#Function#850928c2
     */
    public function checkTotalPriceMiddleware() {
        return function () {
            if ($_SESSION['usces_entry']['order']['total_full_price'] <= 0) {
                return $this->module->clientErrorStore->getErrorResponse(ErrorCodes::AMOUNT_IS_ZERO);
            }
        };
    }

    /**
     * Create a transaction
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @return array
     */
    public function request() {
        global $usces;

        $entry = isset($_SESSION['usces_entry']) ? $_SESSION['usces_entry'] : [];
        $order = !empty($entry['order']) ? $entry['order'] : [];

        if (empty($entry) || empty($order)) {
            return $this->module->clientErrorStore->getErrorResponse(ClientErrorStore::INTERNAL_SERVER_ERROR);
        }

        $payload = $this->makeRequestBody();
        $payload = $this->calculateItemPrices($payload);
        $res = $this->module->api->reserve($payload);

        if ($res instanceof GenericError) {
            return $res;
        }

        // add SESSION data of transaction to database for fulfillment on LINE redirect
        add_option(
            $res['info']['transactionId'],
            [
                'acting' => $this->module->getActing(),
                'line_request_res' => $res,
                'total' => $order['total_full_price'],
                'currency' => strtoupper(usces_crcode('return')),
                'capture_now' => $payload['options']['payment']['capture'],
                'usces_cart' => $usces->cart->get_cart(),
                'usces_entry' => isset($_SESSION['usces_entry']) ? $_SESSION['usces_entry'] : [],
                'usces_member' => isset($_SESSION['usces_member']) ? $_SESSION['usces_member'] : [],
            ]
        );

        // save order data preprocessing
        usces_save_order_acting_data($res['info']['transactionId']);

        return $res;
    }

    /**
     * Make request body from SESSION data
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @return array
     */
    public function makeRequestBody() {
        global $usces;

        $order = $_SESSION['usces_entry']['order'];
        $delivery = isset($_SESSION['usces_entry']['delivery']) ? $_SESSION['usces_entry']['delivery'] : [];

        $products = [];
        $index = 0;
        $shipping = false;
        $capture_type = $this->module->getActingOpts()['payment_capture_type'];
        $capture = $capture_type === 'on_purchase' ? true : false;
        $cart = $usces->cart->get_cart();
        foreach ($cart as $item) {
            $item_division = get_post_meta($item['post_id'], '_item_division', true);
            $division = empty($item_division) ? 'shipped' : $item_division;
            if ($division === 'shipped') {
                $shipping = true;
            }

            $itemCode = $usces->getItemCode($item['post_id']);
            $pictid = (int)$usces->get_mainpictid($itemCode);
            $imageurl = wp_get_attachment_image_src($pictid);
            $products[] = [
                'id' => $itemCode,
                'name' => $usces->getItemName($item['post_id']),
                'quantity' => $item['quantity'],
                'price' => $item['price'],
            ];
            if ($imageurl !== false) {
                $products[$index]['imageUrl'] = $imageurl[0];
            }

            $index++;
        }

        $packages = [
            'id' => uniqid(),
            'amount' => $order['total_items_price'],
            'userFee' => 0,
            'products' => $products,
        ];
        $cname = get_option('usces')['company_name'];
        if (!empty($cname)) {
            $packages['name'] = $cname;
        }

        $uuid = uniqid('wcexalp_request_', true);
        $payload = [
            'amount' => $order['total_full_price'],
            'currency' => strtoupper(usces_crcode('return')),
            'orderId' => $uuid,
            'redirectUrls' => [
                'cancelUrl' => USCES_CART_URL,
                'confirmUrl' => LinePay::getConfirmRedirectUrl(),
                'confirmUrlType' => 'CLIENT',
            ],
            'packages' => [$packages],
            'options' => [
                'display' => [
                    'locale' => $this->module->getActingOpts()['locale'],
                ],
                'payment' => [
                    'capture' => $capture,
                ],
            ],
        ];

        if ($shipping === true) {
            $payload['options']['shipping'] = [
                'feeAmount' => $order['shipping_charge'],
                'type' => 'FIXED_ADDRESS',
                'feeInquiryType' => 'FIXED',
                'address' => [
                    'country' => $delivery['country'],
                    'postalCode' => $delivery['zipcode'],
                    'state' => $delivery['pref'],
                    'city' => $delivery['address1'],
                    'detail' => $delivery['address2'],
                    'optional' => $delivery['address3'],
                    'recipient' => [
                        'firstName' => $delivery['name2'],
                        'lastName' => $delivery['name1'],
                        'firstNameOptional' => $this->name4,
                        'lastNameOptional' => $this->name3,
                        'email' => $delivery['mailaddress1'],
                        'phoneNo' => $delivery['tel'],
                    ],
                ],
            ];
        }

        return $payload;
    }

    /**
     * Apply discount, point usage, coupon usage, and tax as dummy products.
     *
     * LINE Pay has no fields for any of the above listed, and yet the total_full_price **MUST**
     * equal the total_items_price + shipping_fee or /v3/payments/request will fail.
     *
     * Therefore, we have to create fake products that represent discounts and other fees
     *
     * Apparently the great mighty LINE didn't anticipate any of this... What a shocker...
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param array $payload
     * @return array
     */
    public function calculateItemPrices($payload) {
        $order = $_SESSION['usces_entry']['order'];
        $usedpoint = $order['usedpoint'] * -1;
        $im_a_teapot = $usedpoint + $order['discount'] + $order['tax'];

        if ($order['discount'] !== 0) {
            $payload['packages'][0]['products'][] = [
                'name' => __('Discount', 'wcex_linepay'),
                'quantity' => 1,
                'price' => $order['discount'],
            ];
        }

        if (get_option('usces')['tax_mode'] === 'exclude' && $order['tax'] > 0) {
            $payload['packages'][0]['products'][] = [
                'name' => __('consumption tax', 'usces'),
                'quantity' => 1,
                'price' => $order['tax'],
            ];
        }

        if ($order['usedpoint'] > 0) {
            $payload['packages'][0]['products'][] = [
                'name' => __('Used points', 'usces'),
                'quantity' => 1,
                'price' => $usedpoint,
            ];
        }

        $payload['packages'][0]['amount'] = $payload['packages'][0]['amount'] + $im_a_teapot;

        return $payload;
    }
}