// worker-homeserve.js (Versión Definitiva PostgreSQL - MULTI-EMPRESA SAAS)
import { chromium } from 'playwright';
import pg from 'pg';

const { Pool } = pg;

// --- CONFIGURACIÓN ---
const CONFIG = {
  DATABASE_URL: process.env.DATABASE_URL,
  LOGIN_URL: 'https://www.clientes.homeserve.es/cgi-bin/fccgi.exe?w3exec=PROF_PASS',
  BASE_CGI: 'https://www.clientes.homeserve.es/cgi-bin/fccgi.exe',
  NAV_TIMEOUT: 60000,
  POLL_INTERVAL_MS: 5000 
};

if (!CONFIG.DATABASE_URL) {
    console.error("❌ ERROR FATAL: Falta la variable de entorno DATABASE_URL");
    process.exit(1);
}

const pool = new Pool({ connectionString: CONFIG.DATABASE_URL, ssl: false });

// --- UTILS ---
function checkWeekend(dateStr) {
    if (!dateStr) return; 
    const parts = dateStr.split('/');
    if (parts.length !== 3) return; 
    const day = parseInt(parts[0], 10);
    const month = parseInt(parts[1], 10) - 1; 
    const year = parseInt(parts[2], 10);
    const d = new Date(year, month, day);
    if (d.getDay() === 0 || d.getDay() === 6) {
        throw new Error(`⛔ ERROR: La fecha ${dateStr} es fin de semana (Sáb/Dom). No permitido por HomeServe.`);
    }
}

async function getHomeServeCreds(ownerId) {
    const q = await pool.query(
        "SELECT username, password_hash FROM provider_credentials WHERE provider = 'homeserve' AND status = 'active' AND owner_id = $1 LIMIT 1",
        [ownerId]
    );
    if (q.rowCount === 0) throw new Error(`Sin credenciales para ID: ${ownerId}`);
    return { 
        user: q.rows[0].username, 
        pass: Buffer.from(q.rows[0].password_hash, 'base64').toString('utf-8') 
    };
}

async function withBrowser(fn) {
  const browser = await chromium.launch({ headless: true, args: ['--no-sandbox', '--disable-setuid-sandbox'] });
  const context = await browser.newContext();
  const page = await context.newPage();
  try { return await fn(page); } finally { await browser.close().catch(() => {}); }
}

async function findLocatorInFrames(page, selector) {
  for (const fr of page.frames()) {
    const loc = fr.locator(selector);
    try { if (await loc.count()) return { frame: fr, locator: loc }; } catch (_) {}
  }
  return null;
}

async function clickFirstThatExists(page, selectors) {
  for (const sel of selectors) {
    const hit = await findLocatorInFrames(page, sel);
    if (hit) { await hit.locator.first().click(); return sel; }
  }
  return null;
}

async function fillFirstThatExists(page, selectors, value) {
  for (const sel of selectors) {
    const hit = await findLocatorInFrames(page, sel);
    if (hit) { await hit.locator.first().fill(String(value)); return sel; }
  }
  return null;
}

// --- INYECCIÓN EN HOMESERVE ---
async function loginAndProcess(page, creds, jobData) {
  console.log(`>>> 1. Login en HomeServe con usuario: ${creds.user}`);
  
  if (jobData.appointment_date) checkWeekend(jobData.appointment_date);
  if (!jobData.observation || jobData.observation.trim().length === 0) {
      throw new Error('⛔ ERROR: El campo Observaciones es obligatorio.');
  }

  // Auto-aceptar popups de HomeServe si saltan
  page.on('dialog', async dialog => await dialog.accept());

  await page.goto(CONFIG.LOGIN_URL, { waitUntil: 'domcontentloaded', timeout: CONFIG.NAV_TIMEOUT });
  await page.waitForTimeout(1000); 

  await fillFirstThatExists(page, ['input[name="w3user"]', 'input[type="text"]'], creds.user);
  await fillFirstThatExists(page, ['input[name="w3clau"]', 'input[type="password"]'], creds.pass);
  
  await page.keyboard.press('Enter');
  await page.waitForTimeout(3000); 

  const loginFail = await findLocatorInFrames(page, 'input[type="password"]');
  if (loginFail) throw new Error(`Login fallido en HomeServe.`);

  console.log(`>>> 2. Login OK. Navegando al expediente ${jobData.service_number}...`);
  const serviceUrl = `${CONFIG.BASE_CGI}?w3exec=ver_servicioencurso&Servicio=${jobData.service_number}&Pag=1`;
  await page.goto(serviceUrl, { waitUntil: 'domcontentloaded', timeout: CONFIG.NAV_TIMEOUT });
  await page.waitForTimeout(1500);

  const changeBtn = await clickFirstThatExists(page, ['input[name="repaso"]']);
  if (!changeBtn) throw new Error(`No veo el botón 'repaso' en el siniestro.`);

  console.log('>>> 3. Accediendo al formulario. Rellenando datos...');
  await page.waitForTimeout(1500);

  const HOMESERVE_MAP = { 'CITADO': '307', 'ESPERA': '303', 'TERMINADO': '345', 'ANULADO': '352' };
  let targetCode = String(jobData.new_status).toUpperCase();
  if (HOMESERVE_MAP[targetCode]) targetCode = HOMESERVE_MAP[targetCode];

  // SELECCIÓN NATIVA DE PLAYWRIGHT (Mucho más fiable)
  const selectEstado = await findLocatorInFrames(page, 'select[name="ESTADO"]');
  if (!selectEstado) throw new Error('No encontré el desplegable de estados.');
  await selectEstado.locator.first().selectOption({ value: targetCode }).catch(() => {
      throw new Error(`El código de estado '${targetCode}' no existe en HomeServe.`);
  });

  if (jobData.appointment_date) {
      await fillFirstThatExists(page, ['input[name="FECSIG"]'], jobData.appointment_date);
  }

  await fillFirstThatExists(page, ['textarea[name="Observaciones"]'], jobData.observation);

  if (jobData.inform_client) {
     const informCheck = await findLocatorInFrames(page, 'input[name="INFORMO"]');
     if (informCheck && !(await informCheck.locator.first().isChecked())) {
         await informCheck.locator.first().check();
     }
  }

  console.log('>>> 4. Ejecutando clic en Aceptar el Cambio...');
  const saveBtnHit = await findLocatorInFrames(page, 'input[name="BTNCAMBIAESTADO"]');
  if (!saveBtnHit) throw new Error('No encuentro el botón para guardar los cambios.');

  // Hacemos el clic y esperamos a que la página reaccione
  await Promise.all([
      page.waitForNavigation({ timeout: 10000 }).catch(() => {}),
      saveBtnHit.locator.first().click()
  ]);

  await page.waitForTimeout(2000); 

  // LEEMOS SOLO LOS ERRORES ROJOS (Ignoramos etiquetas <b>)
  const resultText = await page.evaluate(() => {
      const errEl = document.querySelector('font[color="#FF0000"], .Estilo4');
      return errEl ? errEl.innerText : "";
  });

  if (resultText && resultText.trim().length > 0) {
      throw new Error(`HomeServe devolvió un error rojo: ${resultText.trim()}`);
  }

  console.log('>>> 5. Formulario enviado sin errores aparentes.');
  return { success: true };
}

// --- BUCLE DE COLA ---
async function pollQueue() {
    try {
        const res = await pool.query(`
            UPDATE robot_queue SET status = 'RUNNING', updated_at = NOW()
            WHERE id = (SELECT id FROM robot_queue WHERE status = 'PENDING' AND provider = 'homeserve' ORDER BY created_at ASC FOR UPDATE SKIP LOCKED LIMIT 1)
            RETURNING *;
        `);

        if (res.rowCount > 0) {
            const job = res.rows[0];
            console.log(`\n========================================`);
            console.log(`🤖 TRABAJO #${job.id} | Empresa ID: ${job.owner_id}`);
            console.log(`📋 Siniestro: ${job.service_number} -> Cambiar a: ${job.new_status}`);
            console.log(`========================================`);

            try {
                const creds = await getHomeServeCreds(job.owner_id);
                await withBrowser(async (page) => {
                    await loginAndProcess(page, creds, job);
                });
                await pool.query("UPDATE robot_queue SET status = 'DONE', updated_at = NOW() WHERE id = $1", [job.id]);
                console.log(`✅ TRABAJO #${job.id} COMPLETADO CON ÉXITO.\n`);
            } catch (err) {
                console.error(`❌ ERROR EN TRABAJO #${job.id}:`, err.message);
                await pool.query("UPDATE robot_queue SET status = 'FAILED', error_msg = $1, updated_at = NOW() WHERE id = $2", [err.message, job.id]);
            }
            setTimeout(pollQueue, 1000);
        } else {
            setTimeout(pollQueue, CONFIG.POLL_INTERVAL_MS);
        }
    } catch (e) {
        console.error("Error crítico en el bucle del robot:", e.message);
        setTimeout(pollQueue, CONFIG.POLL_INTERVAL_MS);
    }
}

console.log("🚀 Robot HomeServe (Multi-Empresa SaaS) Iniciado.");
console.log("📡 Conectado a PostgreSQL. Esperando peticiones en la cola...");
pollQueue();