import express from 'express';
import axios from 'axios';
import { WhatsAppMessage } from './types';
import { getHandler, Handler } from './chatHandlers';
import dotenv from 'dotenv';
dotenv.config();


if (process.env.NODE_ENV === 'development') {
  process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
}

if (
  process.env.NODE_ENV !== 'development' &&
  process.env.NODE_TLS_REJECT_UNAUTHORIZED === '0'
) {
  throw new Error('NODE_TLS_REJECT_UNAUTHORIZED está activado en producción. Abortando.');
}


const app = express();

const port = Number(process.env.PORT) || 3001;
const agentUrl = process.env.LLM_AGENT_URL as string | undefined;
const openWaUrl = process.env.OPEN_WA_URL as string | undefined;

const config = {
  API_URL: openWaUrl || '',
  MAX_ATTEMPTS: parseInt(process.env.MAX_ATTEMPTS || '100', 10),
  RETRY_MS: parseInt(process.env.RETRY_MS || '2000', 10)
};

function log(level: keyof Console | 'info' | 'warn' | 'error' | 'debug', ...args: unknown[]) {
  const logger = (console as any)[level] as ((...args: unknown[]) => void) | undefined;
  if (logger) logger(...args);
  else console.log(...args);
}

async function waitForGateway() {
  for (let i = 1; i <= config.MAX_ATTEMPTS; i++) {
    try {
      await axios.get(`${config.API_URL}/api-docs/`);
      log('info', '🟢  nucleo-whatsapp ready');
      return;
    } catch(e) {
      log('warn', `Gateway not responding`,' connecting to: ', `${config.API_URL}/api-docs/`, ` (attempt ${i}/${config.MAX_ATTEMPTS})…`, e);
      await new Promise(r => setTimeout(r, config.RETRY_MS));
    }
  }
  throw new Error('nucleo-whatsapp did not respond in time');
}

async function clearWebhooks() {
  try {
    const { data } = await axios.post(`${config.API_URL}/listWebhooks`);
    const hooks = data?.response || [];
    if (!hooks.length) {
      log('info', 'No existing webhooks to remove');
      return;
    }

    log('info', `Removing ${hooks.length} webhooks…`);
    const results = await Promise.allSettled(
      hooks.map((h: any) => axios.post(`${config.API_URL}/removeWebhook`, { args: { webhookId: h.id } }))
    );

    results.forEach((r: PromiseSettledResult<any>, i: number) => {
      const id = hooks[i].id;
      if (r.status === 'fulfilled' && r.value?.data?.response === true) {
        log('debug', `✔️  Removed webhook ${id}`);
      } else {
        log('warn', `⚠️  Failed to remove webhook ${id}`);
      }
    });

    const ok = results.filter((r: PromiseSettledResult<any>) => r.status === 'fulfilled' && (r as PromiseFulfilledResult<any>).value?.data?.response === true).length;
    log('info', `Cleanup OK (${ok}/${hooks.length} removed)`);
  } catch (e: any) {
    log('error', 'Failed cleaning webhooks:', e.response?.data || e.message);
  }
}

async function registerWebhook() {
  const url = process.env.WEBHOOK_URL || `http://whatsapp-router:${port}/webhook`;
  const eventConfig = {
    onAck: false,
    onAddedToGroup: true,
    onAnyMessage: false,
    onBattery: true,
    onBroadcast: true,
    onButton: true,
    onCallState: false,
    onChatDeleted: true,
    onChatOpened: true,
    onChatState: true,
    onContactAdded: true,
    onGlobalParticipantsChanged: true,
    onGroupApprovalRequest: true,
    onGroupChange: true,
    onIncomingCall: false,
    onLabel: true,
    onLogout: true,
    onMessage: true,
    onMessageDeleted: true,
    onNewProduct: true,
    onOrder: true,
    onPlugged: false,
    onPollVote: true,
    onReaction: true,
    onRemovedFromGroup: false,
    onStateChanged: false,
    onStory: false,
  };

  const events = Object.entries(eventConfig)
    .filter(([_, enabled]) => enabled)
    .map(([event]) => event);

  const { data } = await axios.post(`${config.API_URL}/registerWebhook`, {
    args: { url, events }
  });

  log('info', '✔️  Webhook registered:', data);
}

app.use(express.json());

app.post('/webhook', async (req: express.Request, res: express.Response) => {
  let message: WhatsAppMessage | undefined;
  let text: string | undefined;
  let from: string | undefined;

  try {
    if (req.body && req.body.data) {
      // New webhook format from nucleo-whatsapp
      message = req.body.data as WhatsAppMessage;
      text = (req.body.data.body as string) || req.body.data.text;
      from = req.body.data.from;
    } else {
      throw new Error('Invalid webhook format');
    }
  }catch{}


  if (message) {
    const tipo = typeof message === 'string' ? 'texto' : 'objeto';
    const origen = from || (message?.chatId ?? 'desconocido');
    log('info', `📩 Mensaje recibido (${message?.text}) de ${origen}`);
  }

  try {
    if (!message) return res.sendStatus(200);
    if (!openWaUrl) throw new Error('Service URLs not configured');
    const chatId = (message && message.chatId) || from;
    const handler = getHandler(chatId, agentUrl);
    if (!handler) throw new Error('No handler configured');
    let reply: string;
    if (typeof handler === 'string') {
      const agentRes = await axios.post(handler, {message});
      reply = agentRes.data.reply || agentRes.data;
    } else {
      reply = await handler(message);
    }
    await axios.post(`${openWaUrl}/sendText`, { args: { to: from, content: reply } });
  } catch (err: any) {
    console.error('Error processing message', err.message);
  }

  res.sendStatus(200);
});


app.listen(port, async () => {
  console.log(`WhatsApp router listening on ${port}`);
  try {
    await waitForGateway();
    await clearWebhooks();
    await registerWebhook();
  } catch (err: any) {
    log('error', 'Webhook setup failed:', err.message);
  }
});