<?php

declare(strict_types=1);

namespace Opencart\Admin\Controller\Extension\PayAnyWay\Payment;

/**
 * Class PayAnyWay
 *
 * @package Opencart\Admin\Controller\Extension\PayAnyWay\Payment
 */
class PayAnyWay extends \Opencart\System\Engine\Controller
{
	public const CMS_NAME = 'OpenCart';
	public const MODULE_NAME = 'payanyway';
	public const MODULE_VERSION = '1.0.1';
	public const MODULE_DEFAULT_SORT_ORDER = 0;

	private const SUPPORTED_CURRENCIES = ['RUB'];
	private const AVAILABLE_VAT_RATES = [
		'vat_none' => '1105',
		'vat0' => '1104',
		'vat5' => '1108',
		'vat7' => '1109',
		'vat10' => '1103',
		'vat22' => '1113',
		'vat105' => '1110',
		'vat107' => '1111',
		'vat110' => '1107',
		'vat122' => '1114',
	];

	private array $errors = [];

	/**
	 * @throws \Exception
	 */
	public function index(): void
	{
		$this->load->language('extension/payanyway/payment/payanyway');
		$this->document->setTitle($this->language->get('heading_title'));

		$data = [];
		$this->applyValidationErrors($data);

		$data['breadcrumbs'] = $this->getBreadcrumbs();
		$data['save'] = $this->url->link('extension/payanyway/payment/payanyway.save', 'user_token=' . $this->session->data['user_token']);
		$data['back'] = $this->url->link('marketplace/extension', 'user_token=' . $this->session->data['user_token'] . '&type=payment');

		$data['payment_payanyway_status'] = $this->retrieveValue('payment_payanyway_status');
		$data['payment_payanyway_account'] = $this->retrieveValue('payment_payanyway_account');
		$data['payment_payanyway_integrity_code'] = $this->getIntegrityCode();
		$data['payment_payanyway_server'] = $this->retrieveValue('payment_payanyway_server');
		$data['payment_payanyway_vat_rates'] = $this->getModuleVatRates();
		$data['payment_payanyway_vat_rate'] = $this->retrieveValue('payment_payanyway_vat_rate');
		$data['payment_payanyway_currencies'] = $this->getModuleCurrencies();
		$data['payment_payanyway_currency'] = $this->retrieveValue('payment_payanyway_currency');
		$data['order_statuses'] = $this->getAvailableOrderStatuses();
		$data['payment_payanyway_pending_order_status_id'] = $this->retrieveValue('payment_payanyway_pending_order_status_id');
		$data['payment_payanyway_success_order_status_id'] = $this->retrieveValue('payment_payanyway_success_order_status_id');
		$data['payment_payanyway_error_order_status_id'] = $this->retrieveValue('payment_payanyway_error_order_status_id');
		$data['geo_zones'] = $this->getAvailableGeoZones();
		$data['payment_payanyway_geo_zone_id'] = $this->retrieveValue('payment_payanyway_geo_zone_id');
		$data['payment_payanyway_sort_order'] = $this->retrieveValue('payment_payanyway_sort_order');
		$data['payment_payanyway_cms_module_version'] = $this->getCmsModuleVersion();

		$data['header'] = $this->load->controller('common/header');
		$data['column_left'] = $this->load->controller('common/column_left');
		$data['footer'] = $this->load->controller('common/footer');

		$this->response->setOutput($this->load->view('extension/payanyway/payment/payanyway', $data));
	}

	public function save(): void
	{
		$this->load->language('extension/payanyway/payment/payanyway');

		$json = [];

		if (!$this->user->hasPermission('modify', 'extension/payanyway/payment/payanyway')) {
			$json['error'] = $this->language->get('error_permission');

			$this->response->addHeader('Content-Type: application/json');
			$this->response->setOutput(json_encode($json));

			return;
		}

		if (!$this->validate()) {
			$errorString = $this->language->get('error_validation') .
				"<p style='white-space: pre-wrap; margin: 0;'>\n";

			foreach ($this->errors as $error) {
				$errorString .= $error . "\n";
			}

			$errorString = substr($errorString, 0, -1) . "</p>";

			$json['error'] = $errorString;
		}

		if (!$json) {
			$this->load->model('setting/setting');
			$this->model_setting_setting->editSetting('payment_payanyway', $this->request->post);

			$json['success'] = $this->language->get('text_success');
		}

		$this->response->addHeader('Content-Type: application/json');
		$this->response->setOutput(json_encode($json));
	}

	/**
	 * @throws \Exception
	 */
	public function install(): void
	{
		if (!$this->user->hasPermission('modify', 'extension/payment')) {
			return;
		}

		$defaultSettings = [
			'payment_payanyway_status' => 0,
			'payment_payanyway_account' => '',
			'payment_payanyway_integrity_code' => '',
			'payment_payanyway_server' => 'prod',
			'payment_payanyway_sort_order' => 0,
			'payment_payanyway_cms_module_version' => $this->getCmsModuleVersion(),
		];

		$orderStatuses = $this->getAvailableOrderStatuses();

		$pendingStatus = array_filter($orderStatuses, function ($status) {
			return (int)$status['order_status_id'] === 1;
		});
		if (!empty($pendingStatus)) {
			$pendingKey = key($pendingStatus);
			$defaultSettings['payment_payanyway_pending_order_status_id'] = $pendingStatus[$pendingKey]['order_status_id'];
		}

		$successStatus = array_filter($orderStatuses, function ($status) {
			return (int)$status['order_status_id'] === 5;
		});
		if (!empty($successStatus)) {
			$successKey = key($successStatus);
			$defaultSettings['payment_payanyway_success_order_status_id'] = $successStatus[$successKey]['order_status_id'];
		}

		$errorStatus = array_filter($orderStatuses, function ($status) {
			return (int)$status['order_status_id'] === 10;
		});
		if (!empty($errorStatus)) {
			$errorKey = key($errorStatus);
			$defaultSettings['payment_payanyway_error_order_status_id'] = $errorStatus[$errorKey]['order_status_id'];
		}

		$this->load->model('setting/setting');
		$this->model_setting_setting->editSetting('payment_payanyway', $defaultSettings);
	}

	public function uninstall(): void
	{
		if (!$this->user->hasPermission('modify', 'extension/payment')) {
			return;
		}

		$this->load->model('setting/setting');
		$this->model_setting_setting->deleteSetting('payment_payanyway');
	}

	private function validate(): bool
	{
		$this->errors = [];

		if (!isset($this->request->post['payment_payanyway_account']) ||
			((int)$this->request->post['payment_payanyway_account'] <= 0)
		) {
			$this->errors['account'] = $this->language->get('error_account');
		}

		if (empty($this->request->post['payment_payanyway_integrity_code'])) {
			$this->errors['integrity_code'] = $this->language->get('error_integrity_code');
		}

		if (empty($this->request->post['payment_payanyway_pending_order_status_id'])) {
			$this->errors['pending_order_status'] = $this->language->get('error_pending_order_status');
		}
		if (empty($this->request->post['payment_payanyway_success_order_status_id'])) {
			$this->errors['success_order_status'] = $this->language->get('error_success_order_status');
		}
		if (empty($this->request->post['payment_payanyway_error_order_status_id'])) {
			$this->errors['error_order_status'] = $this->language->get('error_error_order_status');
		}

		$sortOrder = isset($this->request->post['payment_payanyway_sort_order'])
			? (int)$this->request->post['payment_payanyway_sort_order']
			: self::MODULE_DEFAULT_SORT_ORDER;
		$this->request->post['payment_payanyway_sort_order'] = $sortOrder;
		$this->request->post['payment_payanyway_cms_module_version'] = $this->getCmsModuleVersion();

		return empty($this->errors);
	}

	/** @param array<string, mixed> $data */
	private function applyValidationErrors(array &$data): void
	{
		$data['error_warning'] = $this->errors['warning'] ?? '';
		$data['error_account'] = $this->errors['account'] ?? '';
		$data['error_integrity_code'] = $this->errors['integrity_code'] ?? '';
		$data['error_pending_order_status'] = $this->errors['pending_order_status'] ?? '';
		$data['error_success_order_status'] = $this->errors['success_order_status'] ?? '';
		$data['error_error_order_status'] = $this->errors['error_order_status'] ?? '';
	}

	/** @return array<int, array{text: string, href: string}> */
	private function getBreadcrumbs(): array
	{
		return [
			[
				'text' => $this->language->get('text_home'),
				'href' => $this->url->link('common/dashboard', 'user_token=' . $this->session->data['user_token']),
			],
			[
				'text' => $this->language->get('text_extension'),
				'href' => $this->url->link('marketplace/extension', 'user_token=' . $this->session->data['user_token'] . '&type=payment'),
			],
			[
				'text' => $this->language->get('heading_title'),
				'href' => $this->url->link('extension/payanyway/payment/payanyway', 'user_token=' . $this->session->data['user_token']),
			],
		];
	}

	private function getIntegrityCode(): string
	{
		$value = $this->retrieveValue('payment_payanyway_integrity_code');
		if (null === $value) {
			return '';
		}

		return htmlspecialchars($value, ENT_QUOTES, 'UTF-8');
	}

	/** @return array<string, mixed> */
	private function getModuleVatRates(): array
	{
		$result = array();
		foreach (self::AVAILABLE_VAT_RATES as $vat => $value) {
			$label = 'entry_' . $vat . '_label';
			$result[$value] = $this->language->get($label);
		}

		return $result;
	}

	/**
	 * @return array<string, mixed>
	 * @throws \Exception
	 */
	private function getModuleCurrencies(): array
	{
		$this->load->model('localisation/currency');
		$shopCurrencies = $this->model_localisation_currency->getCurrencies();

		$result = array();
		foreach (self::SUPPORTED_CURRENCIES as $currencyCode) {
			$result[$currencyCode] = $shopCurrencies[$currencyCode] ?? $this->getDefaultCurrencyDefinition($currencyCode);
		}

		return $result;
	}

	/** @return array<string, mixed> */
	private function getDefaultCurrencyDefinition(string $currencyCode): array
	{
		$definitions = [
			'RUB' => [
				'currency_id' => 0,
				'title' => 'Рубль',
				'code' => 'RUB',
				'symbol_left' => '',
				'symbol_right' => '₽',
				'decimal_place' => '2',
				'value' => 1.00000000,
				'status' => '1',
				'date_modified' => date('Y-m-d H:i:s'),
			],
		];

		return $definitions[$currencyCode] ?? [];
	}

	/**
	 * @return array<string, mixed>
	 * @throws \Exception
	 */
	private function getAvailableOrderStatuses(): array
	{
		$this->load->model('localisation/order_status');
		return $this->model_localisation_order_status->getOrderStatuses();
	}

	/**
	 * @return array<string, mixed>
	 * @throws \Exception
	 */
	private function getAvailableGeoZones(): array
	{
		$this->load->model('localisation/geo_zone');
		return $this->model_localisation_geo_zone->getGeoZones();
	}

	/** @return string */
	private function getCmsModuleVersion(): string
	{
		$this->load->language('common/footer');
		$textFooter = $this->language->get('text_footer');
		$textFooter = is_string($textFooter) ? $textFooter : '';

		$cmsName = $this->detectCmsByPatterns($textFooter);
		$cmsVersion = defined('VERSION') ? constant('VERSION') : '.unknown';

		return sprintf('%s v%s | %s v%s',
			$cmsName,
			$cmsVersion,
			self::MODULE_NAME,
			self::MODULE_VERSION
		);
	}

	private function detectCmsByPatterns($textFooter): string
	{
		$patterns = [
			'ocStore' => '/ocStore/i',
			'Russian OpenCart' => '/opencart-russia/i',
			self::CMS_NAME => '/opencart\.com/i'
		];

		if (!empty($textFooter)) {
			foreach ($patterns as $cms => $pattern) {
				if (preg_match($pattern, $textFooter)) {
					return $cms;
				}
			}
		}

		return self::CMS_NAME;
	}

	private function retrieveValue(string $name): mixed
	{
		return $this->request->post[$name] ?? $this->config->get($name);
	}
}