<?php

/**
 * @package     MokoSuiteBackup
 * @subpackage  com_mokosuitebackup
 * @author      Moko Consulting <hello@mokoconsulting.tech>
 * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
 * @license     GNU General Public License version 3 or later; see LICENSE
 */

namespace Joomla\Component\MokoSuiteBackup\Api\Controller;

defined('_JEXEC') or die;

use Joomla\CMS\MVC\Controller\ApiController;
use Joomla\Component\MokoSuiteBackup\Administrator\Engine\BackupEngine;

class BackupsController extends ApiController
{
	protected $contentType = 'backups';
	protected $default_view = 'backups';

	/**
	 * Start a new backup (POST /api/index.php/v1/mokosuitebackup/backup)
	 */
	public function backup(): static
	{
		if (!$this->app->getIdentity()->authorise('mokosuitebackup.backup.run', 'com_mokosuitebackup')) {
			$this->app->setHeader('status', 403);
			echo json_encode(['errors' => [['title' => 'Access denied']]]);
			$this->app->close();

			return $this;
		}

		$data = json_decode($this->input->json->getRaw(), true) ?: [];

		$profileId   = (int) ($data['profile'] ?? 1);
		$description = $data['description'] ?? 'API backup ' . date('Y-m-d H:i:s');

		$engine = new BackupEngine();
		$result = $engine->run($profileId, $description, 'api');

		if ($result['success']) {
			$this->app->setHeader('status', 200);
			echo json_encode(['data' => $result]);
		} else {
			$this->app->setHeader('status', 500);
			echo json_encode(['errors' => [['title' => $result['message']]]]);
		}

		$this->app->close();

		return $this;
	}

	/**
	 * Download a backup archive (GET /api/index.php/v1/mokosuitebackup/backup/:id/download)
	 */
	public function download(): static
	{
		if (!$this->app->getIdentity()->authorise('mokosuitebackup.backup.download', 'com_mokosuitebackup')) {
			$this->app->setHeader('status', 403);
			echo json_encode(['errors' => [['title' => 'Access denied']]]);
			$this->app->close();

			return $this;
		}

		$id = $this->input->getInt('id', 0);

		$model = $this->getModel('Backup', 'Administrator');
		$item  = $model->getItem($id);

		if (!$item || !$item->id || !$item->filesexist || !is_file($item->absolute_path)) {
			$this->app->setHeader('status', 404);
			echo json_encode(['errors' => [['title' => 'Backup file not found']]]);
			$this->app->close();

			return $this;
		}

		// Stream as binary download instead of base64 to avoid memory exhaustion
		while (@ob_end_clean()) {
			// clear all buffers
		}

		$filename = basename($item->archivename ?? $item->absolute_path);
		$filesize = filesize($item->absolute_path);
		$contentType = str_ends_with($filename, '.tar.gz')
			? 'application/gzip'
			: 'application/zip';

		header('Content-Type: ' . $contentType);
		header("Content-Disposition: attachment; filename*=UTF-8''" . rawurlencode($filename));
		header('Content-Length: ' . $filesize);
		header('Cache-Control: no-cache, must-revalidate');

		readfile($item->absolute_path);

		$this->app->close();

		return $this;
	}

	/**
	 * List backup profiles (GET /api/index.php/v1/mokosuitebackup/profiles)
	 */
	public function profiles(): static
	{
		if (!$this->app->getIdentity()->authorise('core.manage', 'com_mokosuitebackup')) {
			$this->app->setHeader('status', 403);
			echo json_encode(['errors' => [['title' => 'Access denied']]]);
			$this->app->close();

			return $this;
		}

		$model = $this->getModel('Profiles', 'Administrator');
		$items = $model->getItems();

		$data = [];

		// Strip sensitive credentials before serialization
		$sensitiveFields = [
			'ftp_password', 'ftp_username',
			's3_access_key', 's3_secret_key',
			'gdrive_client_secret', 'gdrive_refresh_token',
			'encryption_password', 'ntfy_token',
		];

		foreach ($items as $item) {
			$safe = clone $item;

			foreach ($sensitiveFields as $field) {
				if (isset($safe->$field) && $safe->$field !== '') {
					$safe->$field = '***';
				}
			}

			$data[] = [
				'type'       => 'profiles',
				'id'         => $safe->id,
				'attributes' => $safe,
			];
		}

		$this->app->setHeader('status', 200);
		echo json_encode(['data' => $data]);
		$this->app->close();

		return $this;
	}
}