<?php

declare(strict_types=1);

namespace paygw_moneta;

use core_payment\form\account_gateway;
use paygw_moneta\local\protocol\AssistantProtocol;
use paygw_moneta\local\protocol\PaymentServer;
use paygw_moneta\local\receipt\Client;
use paygw_moneta\local\receipt\Vat;
use stdClass;

/**
 * Платёжный шлюз Moneta для Payment API Moodle: валюта и форма настроек
 * платёжного аккаунта. Имя класса и методов задаёт ядро (`\paygw_<name>\gateway`).
 *
 * @package paygw_moneta
 * @copyright 2026 Moneta Labs {@link https://moneta.ru/}
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class gateway extends \core_payment\gateway
{
    public static function get_supported_currencies(): array
    {
        return [AssistantProtocol::CURRENCY];
    }

    public static function add_configuration_to_gateway_form(account_gateway $form): void
    {
        $mform = $form->get_mform();

        $mform->addElement('text', 'accountnumber', get_string('accountnumber', 'paygw_moneta'));
        $mform->setType('accountnumber', PARAM_ALPHANUMEXT);
        $mform->addRule('accountnumber', null, 'required', null, 'client');
        $mform->addHelpButton('accountnumber', 'accountnumber', 'paygw_moneta');

        $mform->addElement('passwordunmask', 'integritycode', get_string('integritycode', 'paygw_moneta'));
        $mform->setType('integritycode', PARAM_RAW_TRIMMED);
        $mform->addRule('integritycode', null, 'required', null, 'client');
        $mform->addHelpButton('integritycode', 'integritycode', 'paygw_moneta');

        $servers = [];
        foreach (PaymentServer::cases() as $server) {
            $servers[$server->value] = get_string($server->label(), 'paygw_moneta');
        }
        $mform->addElement('select', 'paymentserver', get_string('paymentserver', 'paygw_moneta'), $servers);
        $mform->setDefault('paymentserver', PaymentServer::Prod->value);
        $mform->addHelpButton('paymentserver', 'paymentserver', 'paygw_moneta');

        $mform->addElement('advcheckbox', 'testmode', get_string('testmode', 'paygw_moneta'));
        $mform->addHelpButton('testmode', 'testmode', 'paygw_moneta');

        $mform->addElement('text', 'receiptemail', get_string('receiptemail', 'paygw_moneta'));
        $mform->setType('receiptemail', PARAM_RAW_TRIMMED);
        $mform->addRule('receiptemail', null, 'required', null, 'client');
        $mform->addHelpButton('receiptemail', 'receiptemail', 'paygw_moneta');

        $mform->addElement('advcheckbox', 'fiscalization', get_string('fiscalization', 'paygw_moneta'));
        $mform->addHelpButton('fiscalization', 'fiscalization', 'paygw_moneta');

        $vatOptions = [];
        foreach (Vat::cases() as $vat) {
            $vatOptions[$vat->value] = get_string($vat->langKey(), 'paygw_moneta');
        }
        $mform->addElement('select', 'vat', get_string('vat', 'paygw_moneta'), $vatOptions);
        $mform->addHelpButton('vat', 'vat', 'paygw_moneta');
        $mform->setDefault('vat', Vat::None->value);

        $mform->addElement('advcheckbox', 'sendpaymentlink', get_string('sendpaymentlink', 'paygw_moneta'));
        $mform->addHelpButton('sendpaymentlink', 'sendpaymentlink', 'paygw_moneta');
        $mform->setDefault('sendpaymentlink', 1);

        $mform->addElement('static', 'callbackurl', get_string('callbackurl', 'paygw_moneta'), self::callbackUrlHtml());
        $mform->addHelpButton('callbackurl', 'callbackurl', 'paygw_moneta');
    }

    public static function validate_gateway_form(
        account_gateway $form,
        stdClass $data,
        array $files,
        array &$errors,
    ): void {
        $accountNumber = trim((string) ($data->accountnumber ?? ''));
        if ($accountNumber === '') {
            $errors['accountnumber'] = get_string('required');
        } elseif (preg_match('/\A[0-9]{1,20}\z/', $accountNumber) !== 1) {
            $errors['accountnumber'] = get_string('error:accountnumber', 'paygw_moneta');
        }

        $receiptEmail = trim((string) ($data->receiptemail ?? ''));
        if (Client::normalizeEmail($receiptEmail) === null) {
            $errors['receiptemail'] = get_string('error:receiptemail', 'paygw_moneta');
        }

        if (trim((string) ($data->integritycode ?? '')) === '') {
            $errors['integritycode'] = get_string('required');
        }
    }

    /**
     * Адрес Check URL / Pay URL только для чтения и кнопка «Скопировать»
     * (`core/copy_to_clipboard`: сам вешает обработчик на `data-action`).
     */
    private static function callbackUrlHtml(): string
    {
        global $PAGE;

        $PAGE->requires->js_amd_inline("require(['core/copy_to_clipboard']);");
        $id = \html_writer::random_id('paygw-moneta-callbackurl');

        return \html_writer::div(
            \html_writer::empty_tag('input', [
                'type' => 'text',
                'id' => $id,
                'class' => 'form-control',
                'value' => (new \moodle_url('/payment/gateway/moneta/callback.php'))->out(false),
                'readonly' => 'readonly',
                'size' => 60,
            ])
            . \html_writer::tag('button', get_string('copytoclipboard'), [
                'type' => 'button',
                'class' => 'btn btn-secondary',
                'data-action' => 'copytoclipboard',
                'data-clipboard-target' => '#' . $id,
                'data-clipboard-success-message' => get_string('callbackurl:copied', 'paygw_moneta'),
            ]),
            'input-group',
        );
    }
}