import TelegramBot from 'node-telegram-bot-api';
import { stateManager } from '../services/state';
import { logger, logUserAction } from '../services/logger';
import { getMainMenuKeyboard, getLightningAddressKeyboard } from '../utils/keyboards';
import { messages } from '../messages';

/**
 * Handle /start command
 */
export async function handleStart(bot: TelegramBot, msg: TelegramBot.Message): Promise<void> {
  const chatId = msg.chat.id;
  const userId = msg.from?.id;
  const username = msg.from?.username;
  
  if (!userId) {
    await bot.sendMessage(chatId, messages.errors.userNotIdentified);
    return;
  }

  logUserAction(userId, 'Started bot', {
    username: username,
    firstName: msg.from?.first_name,
  });

  try {
    // Check if user exists
    let user = await stateManager.getUser(userId);
    
    if (!user) {
      // Create new user
      user = await stateManager.createUser(
        userId,
        username,
        msg.from?.first_name,
        msg.from?.last_name
      );
    }

    // Welcome message
    await bot.sendMessage(chatId, messages.start.welcome, { parse_mode: 'Markdown' });

    // Check if lightning address is set
    if (!user.lightningAddress) {
      await bot.sendMessage(chatId, messages.start.needAddressWithOptions(username), { 
        parse_mode: 'Markdown',
        reply_markup: getLightningAddressKeyboard(username),
      });
      
      await stateManager.updateUserState(userId, 'awaiting_lightning_address');
    } else {
      // Show main menu
      await bot.sendMessage(
        chatId,
        messages.start.addressSet(user.lightningAddress),
        {
          parse_mode: 'Markdown',
          reply_markup: getMainMenuKeyboard(),
        }
      );
      
      await stateManager.updateUserState(userId, 'idle');
    }
  } catch (error) {
    logger.error('Error in handleStart', { error, userId });
    await bot.sendMessage(chatId, messages.errors.startAgain);
  }
}

export default handleStart;