import { WebDAV } from 'webdav';
import { getSession } from 'next-auth/react';

export class NextCloudService {
  private webdav: WebDAV;
  private basePath: string = '/Personal/Carnet';

  constructor(token: string) {
    this.webdav = new WebDAV(
      process.env.NEXTCLOUD_URL + '/remote.php/dav/files',
      {
        headers: {
          Authorization: `Bearer ${token}`,
        },
      }
    );
  }

  async ensureCarnetFolder(username: string) {
    const userPath = `${username}${this.basePath}`;
    try {
      await this.webdav.exists(userPath);
    } catch {
      await this.webdav.createDirectory(userPath, { recursive: true });
    }
  }

  async saveNote(username: string, content: string, date: Date = new Date()) {
    const fileName = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}.md`;
    const filePath = `${username}${this.basePath}/${fileName}`;
    
    await this.ensureCarnetFolder(username);
    await this.webdav.putFileContents(filePath, content, { overwrite: true });
    
    return fileName;
  }

  async getNote(username: string, date: Date) {
    const fileName = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}.md`;
    const filePath = `${username}${this.basePath}/${fileName}`;
    
    try {
      const content = await this.webdav.getFileContents(filePath, { format: 'text' });
      return content;
    } catch (error) {
      if (error.response?.status === 404) {
        return null;
      }
      throw error;
    }
  }

  async listNotes(username: string) {
    const userPath = `${username}${this.basePath}`;
    try {
      const files = await this.webdav.getDirectoryContents(userPath);
      return files
        .filter(file => file.basename.endsWith('.md'))
        .map(file => ({
          date: this.fileNameToDate(file.basename),
          name: file.basename,
          path: file.filename
        }));
    } catch (error) {
      if (error.response?.status === 404) {
        return [];
      }
      throw error;
    }
  }

  private fileNameToDate(fileName: string): Date {
    const [year, month, day] = fileName.split('.')[0].split('-').map(Number);
    return new Date(year, month - 1, day);
  }
}