// commands.js
import b4a from 'b4a';
import fs from 'fs';

const agentAvatarPath = './assets/agent.png';
let agentAvatar = '';

// Load the agent avatar once when the module is imported
if (fs.existsSync(agentAvatarPath)) {
  const avatarBuffer = fs.readFileSync(agentAvatarPath);
  agentAvatar = `data:image/png;base64,${b4a.toString(avatarBuffer, 'base64')}`;
}

export default async function handleCommand(command, context) {
  const { eventEmitter, currentTopic, clearMessages, addMessage, joinRoom, leaveRoom, createRoom, listFiles } = context;
  
  const args = command.trim().split(' ');
  const cmd = args[0].toLowerCase();
  const restArgs = args.slice(1).join(' ');

  switch (cmd) {
    case '~clear':
      clearMessages();
      break;
    case '~ping':
      addMessage('LinkUp', 'pong', agentAvatar, currentTopic());
      break;
    case '~help':
      addMessage('LinkUp', 'Available commands:\n- ~clear\n- ~ping\n- ~help\n- ~join [topic]\n- ~leave\n- ~create [alias]\n- ~list-files', agentAvatar, currentTopic());
      break;
    case '~join':
      if (restArgs) {
        await joinRoom(restArgs);
      } else {
        addMessage('LinkUp', 'Usage: ~join [topic]', agentAvatar, currentTopic());
      }
      break;
    case '~leave':
      leaveRoom(currentTopic());
      break;
    case '~create':
      if (restArgs) {
        await createRoom(restArgs);
      } else {
        addMessage('LinkUp', 'Usage: ~create [alias]', agentAvatar, currentTopic());
      }
      break;
    case '~list-files':
      const files = await listFiles();
      const fileList = files.length > 0 ? files.map(file => `- ${file}`).join('\n') : 'No files available';
      addMessage('LinkUp', `Available files:\n${fileList}`, agentAvatar, currentTopic());
      break;
    default:
      console.log('Unknown command:', command);
  }
}