<?php

if (!defined('_PS_VERSION_')) {
    exit;
}


class IbanPro  extends PaymentModule
{

    public $paymentMethodName = 'IBAN';
    public function __construct()
    {
        $this->name = 'ibanpro';

        $this->tab = 'advertising_marketing';
        $this->version = '1.0.0';
        $this->author = 'panariga';

        $this->need_instance = 0;
        parent::__construct();

        $this->displayName = $this->trans('Iban.pro');
        $this->description = $this->trans('Iban.pro module for Ukraine');
        $this->confirmUninstall = $this->trans('Are you sure about removing these details?');
        $this->ps_versions_compliancy = array(
            'min' => '1.7',
            'max' => _PS_VERSION_,
        );
    }

    public function install()
    {
        return parent::install() &&
            $this->registerHook('displayOrderConfirmation') &&  $this->registerHook('displayOrderDetail') && $this->registerHook('paymentOptions');
    }


    public function uninstall()
    {
        if (!parent::uninstall()) {
            return false;
        }

        return true;
    }

    /**
     * Entry point for the module's configuration page.
     * Handles form submission and displays the configuration form.
     */
    public function getContent()
    {
        $output = '';

        // Process form submission if it occurs
        if (Tools::isSubmit('submitIbanTransferModule')) {
            $output .= $this->postProcess();
        }

        // Display the configuration form
        return $output . $this->renderForm();
    }

    /**
     * Saves the configuration settings when the form is submitted.
     */
    protected function postProcess()
    {
        if (Tools::isSubmit('submitIbanTransferModule')) {
            // A list of configuration keys to update. This makes it easy to add more later.
            $configKeys = [
                'IBANTRANSFER_IBAN',
                'IBANTRANSFER_RECEIVER_NAME',
                'IBANTRANSFER_RECEIVER_CODE',
                'IBANTRANSFER_DESCRIPTION_APPEND',
                'IBANTRANSFER_API_TOKEN',
                'IBANTRANSFER_OS_CREATION',
                'IBANTRANSFER_OS_FULL_PAYMENT',
                'IBANTRANSFER_OS_PARTIAL_PAYMENT',
            ];

            foreach ($configKeys as $key) {
                // We use Tools::getValue which sanitizes the input
                Configuration::updateValue($key, Tools::getValue($key));
            }

            return $this->displayConfirmation($this->l('Settings have been updated successfully.'));
        }

        return '';
    }

    /**
     * Renders the configuration form using PrestaShop's HelperForm.
     */
    public function renderForm()
    {
        // Define the structure of the configuration form
        $fields_form = [];

        // === Fieldset 1: Bank Account Details ===
        $fields_form[0]['form'] = [
            'legend' => [
                'title' => $this->l('Bank Account Details'),
                'icon' => 'icon-university', // A more appropriate icon
            ],
            'input' => [
                [
                    'type' => 'text',
                    'label' => $this->l('IBAN Account'),
                    'name' => 'IBANTRANSFER_IBAN',
                    'required' => true,
                    'desc' => $this->l('Enter the full IBAN for receiving payments.'),
                    'class' => 'fixed-width-xxl',
                ],
                [
                    'type' => 'text',
                    'label' => $this->l('Receiver Name'),
                    'name' => 'IBANTRANSFER_RECEIVER_NAME',
                    'required' => true,
                    'desc' => $this->l('Enter the full name of the account holder (individual or company).'),
                    'class' => 'fixed-width-xl',
                ],
                [
                    'type' => 'text',
                    'label' => $this->l('Receiver ID Code (EDRPOU/TIN)'),
                    'name' => 'IBANTRANSFER_RECEIVER_CODE',
                    'required' => true,
                    'desc' => $this->l('Enter the unique identification code for the receiver.'),
                    'class' => 'fixed-width-lg',
                ],
                [
                    'type' => 'text',
                    'label' => $this->l('Append to Payment Description'),
                    'name' => 'IBANTRANSFER_DESCRIPTION_APPEND',
                    'required' => false,
                    'desc' => $this->l('This text will be added after the default description (e.g., "Payment for order #..."). You can use {order_reference} or {cart_id} as placeholders.'),
                    'class' => 'fixed-width-xxl',
                ],
            ],
            'submit' => [
                'title' => $this->l('Save'),
                'class' => 'btn btn-default pull-right',
            ],
        ];

        // === Fieldset 2: Order Statuses Configuration ===
        $order_states = OrderState::getOrderStates((int)$this->context->language->id);

        $fields_form[1]['form'] = [
            'legend' => [
                'title' => $this->l('Order Statuses'),
                'icon' => 'icon-cogs',
            ],
            'input' => [
                [
                    'type' => 'select',
                    'label' => $this->l('Order Status on Creation'),
                    'name' => 'IBANTRANSFER_OS_CREATION',
                    'options' => [
                        'query' => $order_states,
                        'id' => 'id_order_state',
                        'name' => 'name',
                    ],
                    'desc' => $this->l('The status for a new order created with this payment method (e.g., "Awaiting bank wire payment").'),
                ],
                [
                    'type' => 'select',
                    'label' => $this->l('Order Status on Full Payment'),
                    'name' => 'IBANTRANSFER_OS_FULL_PAYMENT',
                    'options' => [
                        'query' => $order_states,
                        'id' => 'id_order_state',
                        'name' => 'name',
                    ],
                    'desc' => $this->l('The status when the full payment is confirmed (e.g., "Payment accepted").'),
                ],
                [
                    'type' => 'select',
                    'label' => $this->l('Order Status on Partial Payment'),
                    'name' => 'IBANTRANSFER_OS_PARTIAL_PAYMENT',
                    'options' => [
                        'query' => $order_states,
                        'id' => 'id_order_state',
                        'name' => 'name',
                    ],
                    'desc' => $this->l('Optional: The status if a partial payment is received (e.g., "On backorder (paid)").'),
                ],
            ],
            'submit' => [
                'title' => $this->l('Save'),
                'class' => 'btn btn-default pull-right',
            ],
        ];

        // === Fieldset 3: API Integration ===
        $fields_form[2]['form'] = [
            'legend' => [
                'title' => $this->l('API Integration (iban.pro)'),
                'icon' => 'icon-key',
            ],
            'input' => [
                [
                    'type' => 'password', // Using 'password' type hides the token
                    'label' => $this->l('iban.pro Access Token'),
                    'name' => 'IBANTRANSFER_API_TOKEN',
                    'required' => false,
                    'desc' => $this->l('Enter your API access token from iban.pro to generate QR codes.'),
                    'class' => 'fixed-width-xxl',
                ],
            ],
            'submit' => [
                'title' => $this->l('Save'),
                'class' => 'btn btn-default pull-right',
            ],
        ];

        // --- HelperForm Boilerplate ---
        $helper = new HelperForm();
        $helper->module = $this;
        $helper->name_controller = $this->name;
        $helper->token = Tools::getAdminTokenLite('AdminModules');
        $helper->currentIndex = AdminController::$currentIndex . '&configure=' . $this->name;
        $helper->default_form_language = (int)Configuration::get('PS_LANG_DEFAULT');
        $helper->title = $this->displayName;
        $helper->show_toolbar = true;
        $helper->toolbar_scroll = true;
        $helper->submit_action = 'submitIbanTransferModule';

        // Load current values from the database
        $configFields = [
            'IBANTRANSFER_IBAN',
            'IBANTRANSFER_RECEIVER_NAME',
            'IBANTRANSFER_RECEIVER_CODE',
            'IBANTRANSFER_DESCRIPTION_APPEND',
            'IBANTRANSFER_API_TOKEN',
            'IBANTRANSFER_OS_CREATION',
            'IBANTRANSFER_OS_FULL_PAYMENT',
            'IBANTRANSFER_OS_PARTIAL_PAYMENT'
        ];
        foreach ($configFields as $field) {
            $helper->fields_value[$field] = Configuration::get($field);
        }

        return $helper->generateForm($fields_form);
    }
    public function hookdisplayOrderDetail(array $params)
    {
        return $this->hookdisplayOrderConfirmation($params);
    }

    public function hookdisplayOrderConfirmation($params)
    {
        return $this->getTPL($params['order']);
    }

    public function getTPL(Order $order)
    {

        $address = new Address($order->id_address_invoice);
        $total = $order->total_paid;
        $description = $order->reference . '; оплата замовлення #' . $order->id . '; ' . $address->lastname . ' ' . $address->firstname;
        $NBULink = $this->getNBUv2($total, $description);
        if (trim(shell_exec('command -v qrencode'))) {
            // 3. If it exists, generate the QR code.
            // CRITICAL: Always use escapeshellarg() on variables passed to shell commands
            // to prevent command injection vulnerabilities.
            $escapedNBULink = escapeshellarg($NBULink);
            $qr = shell_exec("qrencode -o - -s 4 -t SVG $escapedNBULink");

            // 4. (Optional but recommended) Add a final check in case the command fails for other reasons.
            if (empty($qr)) {
                $qr = $this->context->smarty->fetch($this->local_path . 'views/templates/front/emptyQR.svg');
            }
        } else {
            // 5. If 'qrencode' is not found, assign the placeholder.
            $qr = $this->context->smarty->fetch($this->local_path . 'views/templates/front/emptyQR.svg');
        }
        if ($order->payment == $this->paymentMethodName) {
            $this->context->smarty->assign([
                'paymentMethodName' => 'ibanpro',

            ]);
        }
        $this->context->smarty->assign([
            'reciever_name' => Configuration::get('IBANTRANSFER_RECEIVER_NAME'),
            'iban' => Configuration::get('IBANTRANSFER_IBAN'),
            'reciever_code' => Configuration::get('IBANTRANSFER_RECEIVER_CODE'),
            'description' => $description . ' ' . Configuration::get('IBANTRANSFER_DESCRIPTION_APPEND'),
            'total' => $total,
            'NBULink' =>  $NBULink,
            'qr' => $qr,

        ]);

        return $this->display(__FILE__, '/views/templates/front/displayOrderConfirmation.tpl');
    }

    public function getNBUv2($amount, $description)
    {

        $display = '';
        $ibanSUM =  sprintf('UAH%s', number_format((float) $amount, 2, '.', ''));

        $codeContentsV2 = implode("\n", array(
            mb_convert_encoding('BCD', 'ASCII'),
            mb_convert_encoding(sprintf('%03d', '2'), 'ASCII'),
            mb_convert_encoding('2', 'ASCII'),
            mb_convert_encoding('UCT', 'ASCII'),
            '',
            mb_convert_encoding(Configuration::get('IBANTRANSFER_RECEIVER_NAME'), 'windows-1251'),
            mb_convert_encoding(Configuration::get('IBANTRANSFER_IBAN'), 'ASCII'),
            mb_convert_encoding($ibanSUM, 'ASCII'),
            mb_convert_encoding(Configuration::get('IBANTRANSFER_RECEIVER_CODE'), 'windows-1251'),
            '',
            '',
            mb_convert_encoding($description, 'windows-1251'),
            $display,
            '',
        ));

        return 'https://bank.gov.ua/qr/' . $this->base64url_encode($codeContentsV2);
    }

    public static function base64url_encode($data)
    {
        // First of all you should encode $data to Base64 string
        $b64 = base64_encode($data);

        // Make sure you get a valid result, otherwise, return FALSE, as the base64_encode() function do
        if ($b64 === false) {
            return false;
        }

        // Convert Base64 to Base64URL by replacing “+” with “-” and “/” with “_”
        $url = strtr($b64, '+/', '-_');

        // Remove padding character from the end of line and return the Base64URL result
        return rtrim($url, '=');
    }


    public function hookPaymentOptions($params)
    {


        if (!$this->active) {
            return;
        }
        if (!Configuration::get('IBANTRANSFER_IBAN') || !Configuration::get('IBANTRANSFER_RECEIVER_CODE') || !Configuration::get('IBANTRANSFER_RECEIVER_NAME')) {
            return;
        }

        $payment_options = [

            $this->getPaymentOption(),

        ];

        return $payment_options;
    }

    public function getPaymentOption()
    {
        $externalOption = new \PrestaShop\PrestaShop\Core\Payment\PaymentOption();
        $externalOption->setCallToActionText($this->l('Оплата переказом за реквізитами IBAN'))
            ->setAction($this->context->link->getModuleLink($this->name, 'validation', ['methodPayment' => 'onlinePayment'], true))
            //    ->setInputs([                'onlinePayment' => true,            ])
            ->setAdditionalInformation($this->context->smarty->fetch('module:' . $this->name . '/views/templates/front/payment_info.tpl'))
            //   ->setLogo(Media::getMediaPath(_PS_MODULE_DIR_ . $this->name . '/payment.jpg'))
        ;

        return $externalOption;
    }
}