<?php
namespace Opencart\Admin\Controller\Extension\Hutko\Payment;

class Hutko extends \Opencart\System\Engine\Controller {
	private $refund_url = 'https://pay.hutko.org/api/reverse/order_id';
	private $status_url = 'https://pay.hutko.org/api/status/order_id';

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

		$this->document->setTitle($this->language->get('heading_title'));

		$data['breadcrumbs'] = [];
		$data['breadcrumbs'][] = [
			'text' => $this->language->get('text_home'),
			'href' => $this->url->link('common/dashboard', 'user_token=' . $this->session->data['user_token'])
		];
		$data['breadcrumbs'][] = [
			'text' => $this->language->get('text_extension'),
			'href' => $this->url->link('marketplace/extension', 'user_token=' . $this->session->data['user_token'] . '&type=payment')
		];
		$data['breadcrumbs'][] = [
			'text' => $this->language->get('heading_title'),
			'href' => $this->url->link('extension/hutko/payment/hutko', 'user_token=' . $this->session->data['user_token'])
		];

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

		// Configuration Fields
		$fields = [
			'payment_hutko_merchant_id',
			'payment_hutko_secret_key',
			'payment_hutko_shipping_include',
			'payment_hutko_shipping_product_name',
			'payment_hutko_shipping_product_code',
			'payment_hutko_new_order_status_id',
			'payment_hutko_success_status_id',
			'payment_hutko_declined_status_id',
			'payment_hutko_expired_status_id',
			'payment_hutko_refunded_status_id',
			'payment_hutko_include_discount_to_total',
			'payment_hutko_status',
			'payment_hutko_sort_order',
			'payment_hutko_geo_zone_id',
			'payment_hutko_total',
			'payment_hutko_save_logs'
		];

		foreach ($fields as $field) {
			$data[$field] = $this->config->get($field);
		}

		// Defaults
		if (is_null($data['payment_hutko_shipping_product_name'])) $data['payment_hutko_shipping_product_name'] = 'Package material';
		if (is_null($data['payment_hutko_shipping_product_code'])) $data['payment_hutko_shipping_product_code'] = '0_0_1';
		if (is_null($data['payment_hutko_total'])) $data['payment_hutko_total'] = '0.01';

		$this->load->model('localisation/order_status');
		$data['order_statuses'] = $this->model_localisation_order_status->getOrderStatuses();

		$this->load->model('localisation/geo_zone');
		$data['geo_zones'] = $this->model_localisation_geo_zone->getGeoZones();

		$data['log_content'] = $this->displayLastDayLog();
		
		$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/hutko/payment/hutko', $data));
	}

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

		$json = [];

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

		// Validation
		if (empty($this->request->post['payment_hutko_merchant_id']) || !is_numeric($this->request->post['payment_hutko_merchant_id'])) {
			$json['error']['payment_hutko_merchant_id'] = $this->language->get('error_merchant_id_numeric');
		}

		$key = $this->request->post['payment_hutko_secret_key'] ?? '';
		if (empty($key) || ($key != 'test' && (strlen($key) < 10 || is_numeric($key)))) {
			$json['error']['payment_hutko_secret_key'] = $this->language->get('error_secret_key_invalid');
		}

		if (!$json) {
			$this->load->model('setting/setting');
			$this->model_setting_setting->editSetting('payment_hutko', $this->request->post);
			$json['success'] = $this->language->get('text_success');
		}

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

	public function install(): void {
		$this->load->model('extension/hutko/payment/hutko');
		$this->model_extension_hutko_payment_hutko->install();
		
		// OC4 Event Registration
		$this->load->model('setting/event');
		
		$event_code = 'hutko_order_info';
		$event_trigger = 'admin/view/sale/order_info/after';
		$event_action = 'extension/hutko/payment/hutko.order_info';

		// OC 4.0.2.0 introduced the array signature for addEvent
		if (version_compare(VERSION, '4.0.2.0', '>=')) {
			$this->model_setting_event->addEvent([
				'code'        => $event_code,
				'description' => 'Hutko Payment Info Panel',
				'trigger'     => $event_trigger,
				'action'      => $event_action,
				'status'      => 1,
				'sort_order'  => 0
			]);
		} else {
			// Legacy argument style for 4.0.0.0 - 4.0.1.x
			$this->model_setting_event->addEvent($event_code, $event_trigger, $event_action, 1, 0);
		}
	}

	public function uninstall(): void {
		$this->load->model('extension/hutko/payment/hutko');
		$this->model_extension_hutko_payment_hutko->uninstall();
		
		$this->load->model('setting/event');
		$this->model_setting_event->deleteEventByCode('hutko_order_info');
	}

	// Event Handler for Admin Order View
	public function order_info(string &$route, array &$args, string &$output): void {
		if (!isset($args['order_id'])) return;

		$this->load->model('sale/order');
		$order_info = $this->model_sale_order->getOrder((int)$args['order_id']);

		// FIX: Check if payment_code exists and matches either 'hutko' or 'hutko.hutko'
		if ($order_info && isset($order_info['payment_code']) && ($order_info['payment_code'] == 'hutko' || $order_info['payment_code'] == 'hutko.hutko')) {
			$this->load->language('extension/hutko/payment/hutko');
			$this->load->model('extension/hutko/payment/hutko');

			$hutko_order = $this->model_extension_hutko_payment_hutko->getHutkoOrder((int)$args['order_id']);
			
			$data['hutko_transaction_ref'] = $hutko_order['hutko_transaction_ref'] ?? '';
			$data['order_id'] = (int)$args['order_id'];
			$data['user_token'] = $this->session->data['user_token'];
			
			// URLs for AJAX actions
			$data['refund_url'] = $this->url->link('extension/hutko/payment/hutko.refund', 'user_token=' . $this->session->data['user_token']);
			$data['status_url'] = $this->url->link('extension/hutko/payment/hutko.status', 'user_token=' . $this->session->data['user_token']);

			// Language Data
			$data['text_payment_information'] = $this->language->get('text_payment_information');
			$data['text_hutko_transaction_ref_label'] = $this->language->get('text_hutko_transaction_ref_label');
			$data['hutko_transaction_ref_display'] = $data['hutko_transaction_ref'] ?: $this->language->get('text_not_available');
			$data['text_not_available'] = $this->language->get('text_not_available');
			
			$data['text_hutko_refund_title'] = $this->language->get('text_hutko_refund_title');
			$data['entry_refund_amount'] = $this->language->get('entry_refund_amount');
			$data['entry_refund_comment'] = $this->language->get('entry_refund_comment');
			$data['button_hutko_refund'] = $this->language->get('button_hutko_refund');
			$data['text_confirm_refund'] = $this->language->get('text_confirm_refund');
			
			$data['text_hutko_status_title'] = $this->language->get('text_hutko_status_title');
			$data['button_hutko_status_check'] = $this->language->get('button_hutko_status_check');

			$content = $this->load->view('extension/hutko/payment/hutko_order', $data);

			// Inject content before the History tab/card
			$pos = strpos($output, '<div id="history"');
			if ($pos !== false) {
				$output = substr_replace($output, $content, $pos, 0);
			} else {
				$output .= $content;
			}
		}
	}

	public function refund(): void {
		$this->load->language('extension/hutko/payment/hutko');
		$this->load->model('extension/hutko/payment/hutko');
		$this->load->model('sale/order');

		$json = [];
		$order_id = (int)($this->request->post['order_id'] ?? 0);
		$amount = (float)($this->request->post['refund_amount'] ?? 0); 
		$comment = (string)($this->request->post['refund_comment'] ?? ''); 

		$hutko_order = $this->model_extension_hutko_payment_hutko->getHutkoOrder($order_id);
		$order_info = $this->model_sale_order->getOrder($order_id);

		if ($hutko_order && $order_info && $amount > 0) {
			$data = [
				'order_id'    => $hutko_order['hutko_transaction_ref'],
				'merchant_id' => $this->config->get('payment_hutko_merchant_id'),
				'version'     => '1.0',
				'amount'      => round($amount * 100),
				'currency'    => $order_info['currency_code'],
				'comment'     => $comment
			];
			$data['signature'] = $this->sign($data);
			
			$response = $this->api($this->refund_url, $data);

			if (($response['response']['reverse_status'] ?? '') === 'approved') {
				$json['success'] = $this->language->get('text_refund_success');
				$msg = sprintf($this->language->get('text_refund_success_comment'), $hutko_order['hutko_transaction_ref'], $amount, $comment);
				$this->model_sale_order->addHistory($order_id, $this->config->get('payment_hutko_refunded_status_id'), $msg, true);
			} else {
				$json['error'] = $response['response']['error_message'] ?? 'Unknown API Error';
				$this->logOC("Refund Failed: " . json_encode($response));
			}
		} else {
			$json['error'] = $this->language->get('error_invalid_request');
		}

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

	public function status(): void {
		$this->load->language('extension/hutko/payment/hutko');
		$json = [];
		
		$ref = $this->request->post['hutko_transaction_ref'] ?? '';
		if ($ref) {
			$data = [
				'order_id'    => $ref,
				'merchant_id' => $this->config->get('payment_hutko_merchant_id'),
				'version'     => '1.0',
			];
			$data['signature'] = $this->sign($data);
			$response = $this->api($this->status_url, $data);
			
			if (($response['response']['response_status'] ?? '') === 'success') {
				$json['success'] = $this->language->get('text_status_success');
				
				unset($response['response']['response_signature_string'], $response['response']['signature']);
				$json['data'] = $response['response'];
			} else {
				$json['error'] = $response['response']['error_message'] ?? 'API Error';
			}
		} else {
			$json['error'] = $this->language->get('error_missing_params');
		}

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

	// Helpers
	private function sign(array $data): string {
		$key = $this->config->get('payment_hutko_secret_key');
		$filtered = array_filter($data, function ($v) { return $v !== '' && $v !== null; });
		ksort($filtered);
		$str = $key;
		foreach ($filtered as $v) $str .= '|' . $v;
		return sha1($str);
	}

	private function api(string $url, array $data): array {
		if ($this->config->get('payment_hutko_save_logs')) $this->logOC('Req: ' . json_encode($data));
		
		$ch = curl_init($url);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(['request' => $data]));
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
		$res = curl_exec($ch);
	//	curl_close($ch);
		
		if ($this->config->get('payment_hutko_save_logs')) $this->logOC('Res: ' . $res);
		return json_decode($res, true) ?: [];
	}

	private function displayLastDayLog() {
		if (!$this->config->get('payment_hutko_save_logs')) return 'Logging Disabled';
		$file = DIR_LOGS . 'error.log';
		if (!file_exists($file)) return 'Log empty';
		
		$lines = file($file);
		$output = [];
		// Get last 50 lines that match "Hutko"
		for ($i = count($lines) - 1; $i >= 0 && count($output) < 50; $i--) {
			if (strpos($lines[$i], 'Hutko') !== false) $output[] = htmlspecialchars($lines[$i], ENT_QUOTES, 'UTF-8');
		}
		return implode('<br>', $output);
	}
	
	private function logOC($message) {
		$this->log->write('Hutko Payment: ' . $message);
	}
}