import * as fs from 'fs';
import * as path from 'path';
import * as os from 'os';
import * as vscode from 'vscode';
const { NodeSSH } = require('node-ssh')

export default class RemoteContainer {

  async firstConnect(host: string, username: string, password: string, port: number): Promise<void> {
    // connect the host and add the public key to the remote authorized_keys
    const defaultPublicKeyPath = path.join(os.homedir(), '.ssh', 'id_rsa.pub');
    // TODO: if there is no public key, generate one
    const publicKey = fs.readFileSync(defaultPublicKeyPath, 'utf8');


    // first connect to the remote host using password
    const ssh = new NodeSSH();
    try {
      await ssh.connect({
        host: host,
        username: username,
        password: password,
        port: port
      });

      // add the public key to the remote authorized_keys
      await ssh.execCommand(`mkdir -p ~/.ssh && echo '${publicKey}' >> ~/.ssh/authorized_keys`);
      console.log('Public key added to remote authorized_keys');
    } catch (error) {
      console.error('Error adding public key: ', error);
    } finally {
      await ssh.dispose();
    }

    // TODO: request change password

    // TODO: use remote.SSH.configFile
    const sshConfigPath = path.join(os.homedir(), '.ssh', 'config');
    // append the host to the local ssh config file 
    const sshConfigContent =
      `\nHost ${host}\n  HostName ${host}\n  Port ${port}\n  User ${username}\n  PreferredAuthentications publickey\n  IdentityFile ~/.ssh/id_rsa\n  `;
    // append the host to the local ssh config file
    fs.writeFileSync(sshConfigPath, sshConfigContent, { encoding: 'utf8', flag: 'a' });
    console.log('Host registered in local ssh config');
  }


  openRemoteFolder(host: string, path: string): void {
    const command = `code --remote ssh-remote+${host} ${path} --reuse-window`
    let terminal = vscode.window.activeTerminal || vscode.window.createTerminal(`Ext Terminal`);
    terminal.show(true);
    terminal.sendText(command);
  }

}