// worker-homeserve.js (Versión PostgreSQL - MULTI-EMPRESA SAAS)
'use strict';

const { chromium } = require('playwright');
const { Pool } = require('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 // Cada 5 segundos mira si hay trabajo
};

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

// Conexión a tu Base de Datos local/servidor
const pool = new Pool({ connectionString: CONFIG.DATABASE_URL, ssl: false });

// --- UTILS ---
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

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);
    const dayOfWeek = d.getDay(); 
    if (dayOfWeek === 0 || dayOfWeek === 6) {
        throw new Error(`⛔ ERROR: La fecha ${dateStr} es fin de semana (Sáb/Dom). No permitido por HomeServe.`);
    }
}

// --- DESENCRIPTAR CREDENCIALES (MULTI-EMPRESA) ---
async function getHomeServeCreds(ownerId) {
    // 🔴 AHORA FILTRAMOS POR EL OWNER_ID EXACTO DEL SERVICIO
    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(`No hay credenciales activas de HomeServe para la empresa/dueño ID: ${ownerId}.`);
    }
    
    const user = q.rows[0].username;
    // Convierte el Base64 (ej: UGFqYXJpdG8xNCQ=) a texto normal
    const pass = Buffer.from(q.rows[0].password_hash, 'base64').toString('utf-8');
    
    return { user, pass };
}

// --- PLAYWRIGHT HELPERS ---
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;
}

async function getDebugInfo(page) {
    try {
        const title = await page.title();
        const url = page.url();
        return `URL: ${url} | Titulo: ${title}`;
    } catch (e) { return "Error extrayendo debug info"; }
}

// --- 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 para HomeServe.');
  }

  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 para el usuario ${creds.user}. Revise las credenciales en IntegraRepara.`);

  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) {
    const debug = await getDebugInfo(page);
    throw new Error(`No veo el botón 'repaso'. ¿El siniestro ${jobData.service_number} existe y está abierto? DEBUG: ${debug}`);
  }

  console.log('>>> 3. Accediendo al formulario. Rellenando datos...');
  await page.waitForLoadState('domcontentloaded');
  await page.waitForTimeout(1000);

  const statusOk = await page.evaluate((code) => {
      const selects = document.querySelectorAll('select');
      for (const s of selects) {
          for (const opt of s.options) {
              if (opt.value == code || opt.text.includes(code)) {
                  s.value = opt.value;
                  return true;
              }
          }
      }
      return false;
  }, jobData.new_status);

  if (!statusOk) throw new Error(`No encontré el estado '${jobData.new_status}' en los desplegables de HomeServe.`);

  if (jobData.appointment_date) {
      const dateFilled = await fillFirstThatExists(page, ['input[name="FECSIG"]'], jobData.appointment_date);
      if (!dateFilled) console.warn('⚠️ No encontré el recuadro para la fecha, pero continuaré.');
  }

  const obsFilled = await fillFirstThatExists(page, ['textarea[name="Observaciones"]'], jobData.observation);
  if (!obsFilled) throw new Error('No encontré el recuadro de Observaciones en la web de HomeServe.');

  if (jobData.inform_client) {
     const labels = ['informado al cliente', 'informado al Cliente'];
     for (const txt of labels) {
       const hit = await findLocatorInFrames(page, `label:has-text("${txt}") >> input[type="checkbox"]`);
       if (hit && !(await hit.locator.first().isChecked())) await hit.locator.first().check();
     }
  }

  const saveBtn = await clickFirstThatExists(page, ['input[type="submit"]', 'input[value="Guardar"]', 'button:has-text("Guardar")']);
  if (!saveBtn) throw new Error('No encuentro el botón para guardar los cambios en HomeServe.');
  
  console.log('>>> 4. Guardando cambios en HomeServe...');
  await page.waitForTimeout(3000); 
  return { success: true };
}

// --- EL CEREBRO: LECTURA DE LA COLA EN POSTGRESQL ---
async function pollQueue() {
    try {
        // Buscamos 1 solo trabajo pendiente y lo bloqueamos para que no lo cojan otros robots si abres varios
        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 {
                // 🔴 PASAMOS EL OWNER_ID PARA SACAR LAS CREDENCIALES CORRECTAS
                const creds = await getHomeServeCreds(job.owner_id);
                
                await withBrowser(async (page) => {
                    await loginAndProcess(page, creds, job);
                });

                // Si va bien, marcamos como DONE en la BD
                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) {
                // Si falla, guardamos el error en la BD para que el HTML lo muestre
                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]);
            }

            // Buscar el siguiente inmediatamente
            setTimeout(pollQueue, 1000);
        } else {
            // Dormimos y volvemos a mirar
            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);
    }
}

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