import { PlayerConnection } from '../player-connection';
import { broadcastTitle } from '../view/title-renderer';
import { GameServer } from '../game-server';
import { Message } from './messages';

export interface UpdateDisplayNameMessage extends Message {
  displayName: string;
}

export function handleUpdateDisplayName(
  server: GameServer,
  conn: PlayerConnection,
  message: UpdateDisplayNameMessage,
): void {
  const newDisplayName = message.displayName.trim();

  if (!newDisplayName) {
    conn.sendMessage('error', 'Display name cannot be empty.');
    return;
  }

  if (newDisplayName.length > 20) {
    conn.sendMessage(
      'error',
      'Display name cannot be longer than 20 characters.',
    );
    return;
  }

  if (newDisplayName === conn.name) {
    return; // No change, do nothing
  }

  conn.name = newDisplayName;
  server.webSocketHandler.setPlayerName(conn.id, newDisplayName);
  broadcastTitle(server);
}