<?php
/**
 * Nextcloud WebDAV Client (Fixed)
 * Клиент для работы с Nextcloud через WebDAV API
 */

class NextcloudClient {
    private $baseUrl;
    private $username;
    private $password;
    private $activeFolder;
    
    public function __construct($config) {
        $this->baseUrl = rtrim($config['base_url'], '/');
        $this->username = $config['username'];
        $this->password = $config['password'];
        $this->activeFolder = trim($config['active_folder'], '/');
    }
    
    /**
     * Загрузка файла в Nextcloud
     */
    public function uploadFile($localPath, $remotePath) {
        try {
            // Убираем activeFolder из remotePath если он уже там есть
            if (strpos($remotePath, $this->activeFolder) === 0) {
                $fullRemotePath = $remotePath;
            } else {
                $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
            }
            
            $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . '/' . $fullRemotePath;
            
            echo "Uploading to URL: $url\n";
            
            // Создаём папку если не существует
            $this->ensureFolderExists(dirname($fullRemotePath));
            
            $ch = curl_init();
            curl_setopt_array($ch, [
                CURLOPT_URL => $url,
                CURLOPT_CUSTOMREQUEST => 'PUT',
                CURLOPT_INFILE => fopen($localPath, 'r'),
                CURLOPT_INFILESIZE => filesize($localPath),
                CURLOPT_USERPWD => $this->username . ':' . $this->password,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 120,
                CURLOPT_HTTPHEADER => [
                    'Content-Type: ' . $this->getMimeType($localPath)
                ]
            ]);
            
            $response = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            $error = curl_error($ch);
            curl_close($ch);
            
            if ($error) {
                throw new Exception('Curl error: ' . $error);
            }
            
            if ($httpCode < 200 || $httpCode >= 300) {
                throw new Exception('HTTP error: ' . $httpCode . ' - ' . $response);
            }
            
            return [
                'success' => true,
                'remote_path' => $fullRemotePath,
                'url' => $url
            ];
            
        } catch (Exception $e) {
            return [
                'success' => false,
                'error' => $e->getMessage()
            ];
        }
    }
    
    /**
     * Создание папки (публичный метод)
     */
    public function createFolder($folderPath) {
        try {
            $this->ensureFolderExists($folderPath);
            return [
                'success' => true,
                'folder_path' => $folderPath
            ];
        } catch (Exception $e) {
            return [
                'success' => false,
                'error' => $e->getMessage()
            ];
        }
    }
    
    /**
     * Создание папки (улучшенная версия)
     */
    private function ensureFolderExists($folderPath) {
        if (empty($folderPath) || $folderPath === '.') {
            return;
        }
        
        // Разбиваем путь на части
        $parts = explode('/', trim($folderPath, '/'));
        $currentPath = '';
        
        foreach ($parts as $part) {
            if (empty($part)) continue;
            
            $currentPath .= '/' . $part;
            $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . $currentPath;
            
            echo "Creating folder: $url\n";
            
            $ch = curl_init();
            curl_setopt_array($ch, [
                CURLOPT_URL => $url,
                CURLOPT_CUSTOMREQUEST => 'MKCOL',
                CURLOPT_USERPWD => $this->username . ':' . $this->password,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 30
            ]);
            
            $response = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            $error = curl_error($ch);
            curl_close($ch);
            
            echo "Folder creation result: HTTP $httpCode\n";
            
            // 201 = created, 405 = already exists, оба OK
            if ($httpCode !== 201 && $httpCode !== 405) {
                echo "Response: $response\n";
                if ($error) {
                    throw new Exception("Curl error creating folder '$currentPath': $error");
                } else {
                    throw new Exception("HTTP error creating folder '$currentPath': $httpCode - $response");
                }
            }
        }
    }
    
    /**
     * Получение ID файла из Nextcloud
     */
    public function getFileId($remotePath) {
        try {
            $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
            $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . '/' . $fullRemotePath;
            
            $ch = curl_init();
            curl_setopt_array($ch, [
                CURLOPT_URL => $url,
                CURLOPT_CUSTOMREQUEST => 'PROPFIND',
                CURLOPT_USERPWD => $this->username . ':' . $this->password,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_HTTPHEADER => [
                    'Content-Type: application/xml',
                    'Depth: 0'
                ],
                CURLOPT_POSTFIELDS => '<?xml version="1.0" encoding="UTF-8"?>
                <d:propfind xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns">
                    <d:prop>
                        <oc:fileid/>
                    </d:prop>
                </d:propfind>'
            ]);
            
            $response = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            curl_close($ch);
            
            if ($httpCode === 207 && $response) {
                $xml = simplexml_load_string($response);
                if ($xml) {
                    foreach ($xml->xpath('//oc:fileid') as $element) {
                        return (string)$element;
                    }
                }
            }
            
            return null;
            
        } catch (Exception $e) {
            error_log("Error getting file ID: " . $e->getMessage());
            return null;
        }
    }
    
    /**
     * Создание прямой ссылки для редактирования файла
     */
    public function createDirectEditLink($remotePath, $recordId, $fileName = null) {
        // Создаем ссылку на файловый менеджер Nextcloud с открытием файла
        if ($fileName === null) {
            $fileName = basename($remotePath);
        }
        // Убираем подчеркивание в начале, если есть
        if (substr($fileName, 0, 1) === '_') {
            $fileName = substr($fileName, 1);
        }
        $editUrl = $this->baseUrl . '/apps/files/?dir=/crm/CRM_Active_Files/Documents/' . $recordId . '&openfile=' . urlencode($fileName);
        
        return [
            'success' => true,
            'edit_url' => $editUrl,
            'direct_url' => $editUrl,
            'file_id' => null
        ];
    }
    
    /**
     * Создание ссылки для редактирования файла
     */
    public function createEditLink($remotePath, $permissions = 3) {
        try {
            $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
            
            // Создаём публичную ссылку через OCS API
            $url = $this->baseUrl . '/ocs/v2.php/apps/files_sharing/api/v1/shares';
            
            $postData = http_build_query([
                'path' => '/' . $fullRemotePath,
                'shareType' => 3, // Public link
                'permissions' => $permissions, // 1=read, 2=update, 3=read+update
                'format' => 'json'
            ]);
            
            $ch = curl_init();
            curl_setopt_array($ch, [
                CURLOPT_URL => $url,
                CURLOPT_POST => true,
                CURLOPT_POSTFIELDS => $postData,
                CURLOPT_USERPWD => $this->username . ':' . $this->password,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_HTTPHEADER => [
                    'OCS-APIRequest: true',
                    'Content-Type: application/x-www-form-urlencoded'
                ]
            ]);
            
            $response = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            curl_close($ch);
            
            if ($httpCode !== 200) {
                throw new Exception('Failed to create share link: HTTP ' . $httpCode . ' - ' . $response);
            }
            
            $data = json_decode($response, true);
            
            if (!$data || $data['ocs']['meta']['statuscode'] !== 200) {
                $message = $data['ocs']['meta']['message'] ?? 'Unknown OCS error';
                throw new Exception('OCS error: ' . $message);
            }
            
            $shareUrl = $data['ocs']['data']['url'];
            
            // Для редактирования добавляем параметр
            $editUrl = $shareUrl . '/edit';
            
            return [
                'success' => true,
                'share_url' => $shareUrl,
                'edit_url' => $editUrl,
                'share_id' => $data['ocs']['data']['id']
            ];
            
        } catch (Exception $e) {
            return [
                'success' => false,
                'error' => $e->getMessage()
            ];
        }
    }
    
    /**
     * Проверка существования файла
     */
    public function fileExists($remotePath) {
        $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
        $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . '/' . $fullRemotePath;
        
        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_CUSTOMREQUEST => 'HEAD',
            CURLOPT_USERPWD => $this->username . ':' . $this->password,
            CURLOPT_NOBODY => true,
            CURLOPT_TIMEOUT => 10,
            CURLOPT_RETURNTRANSFER => true
        ]);
        
        curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        return $httpCode === 200;
    }
    
    /**
     * Скачивание файла из Nextcloud
     */
    public function downloadToTemp($remotePath) {
        $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
        $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . '/' . $fullRemotePath;
        
        $tempFile = sys_get_temp_dir() . '/' . uniqid('nextcloud_download_') . '_' . basename($remotePath);
        
        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_USERPWD => $this->username . ':' . $this->password,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TIMEOUT => 120
        ]);
        
        $result = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        if ($httpCode !== 200) {
            throw new Exception('Download failed: HTTP ' . $httpCode);
        }
        
        file_put_contents($tempFile, $result);
        return $tempFile;
    }
    
    /**
     * Удаление файла
     */
    public function deleteFile($remotePath) {
        $fullRemotePath = $this->activeFolder . '/' . ltrim($remotePath, '/');
        $url = $this->baseUrl . '/remote.php/dav/files/' . $this->username . '/' . $fullRemotePath;
        
        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_CUSTOMREQUEST => 'DELETE',
            CURLOPT_USERPWD => $this->username . ':' . $this->password,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TIMEOUT => 30
        ]);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        
        return $httpCode === 204; // 204 = No Content (успешное удаление)
    }
    
    /**
     * Получение MIME типа файла
     */
    private function getMimeType($filePath) {
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $mimeType = finfo_file($finfo, $filePath);
        finfo_close($finfo);
        return $mimeType ?: 'application/octet-stream';
    }
}