const express = require('express');
const { chromium } = require('playwright');
const admin = require('firebase-admin');
const cors = require('cors');

// --- 1. CONFIGURACIÓN FIREBASE ---
try {
    if (process.env.FIREBASE_PRIVATE_KEY) {
        if (!admin.apps.length) {
            admin.initializeApp({
                credential: admin.credential.cert({
                    projectId: process.env.FIREBASE_PROJECT_ID,
                    clientEmail: process.env.FIREBASE_CLIENT_EMAIL,
                    privateKey: process.env.FIREBASE_PRIVATE_KEY.replace(/\\n/g, '\n'),
                }),
            });
        }
        console.log("✅ Firebase inicializado.");
    } else {
        console.error("❌ FALTA CONFIGURACIÓN DE FIREBASE (Variables de entorno)");
    }
} catch (e) { console.error("❌ Error Firebase:", e.message); }

const db = admin.apps.length ? admin.firestore() : null;
const APPOINTMENTS_COL = "appointments"; 

const URLS = {
    MULTI_LOGIN: "https://web.multiasistencia.com/w3multi/acceso.php",
    MULTI_LIST: "https://web.multiasistencia.com/w3multi/cerrados.php",
    HS_LOGIN: "https://www.clientes.homeserve.es/cgi-bin/fccgi.exe?w3exec=PROF_PASS",
    HS_LIQ: "https://www.clientes.homeserve.es/cgi-bin/fccgi.exe?w3exec=CONSULTALIQ_WEB"
};

const app = express();
app.use(cors({ origin: '*' }));
app.use(express.json({ limit: '50mb' }));

// --- 2. ENDPOINT PRINCIPAL ---
app.post('/api/robot-cobros', async (req, res) => {
    const { action, url, provider, dataToSave, month, year } = req.body; 
    console.log(`🔔 Petición: ${action} [${provider}]`);

    try {
        if (provider === 'MULTI') {
            if (action === 'scan') {
                const lista = await runMultiFullScan(month, year);
                res.json({ success: true, data: lista });
            } 
            else if (action === 'save_data') {
                const count = await runSaver(dataToSave, 'MULTI');
                res.json({ success: true, count });
            }
            else { throw new Error("Acción MULTI inválida"); }
        } 
        else {
            // HOMESERVE
            if (action === 'scan') {
                const lista = await runHSScanner();
                res.json({ success: true, data: lista });
            } 
            else if (action === 'analyze') {
                if (!url) throw new Error("Falta URL");
                const analisis = await runHSAnalyzer(url);
                res.json({ success: true, ...analisis });
            }
            else if (action === 'save_data') {
                const count = await runSaver(dataToSave, 'HS');
                res.json({ success: true, count });
            }
            else { throw new Error("Acción HS inválida"); }
        }

    } catch (err) {
        console.error("❌ CRASH:", err.message);
        res.status(500).json({ success: false, message: err.message });
    }
});

// ==================================================================
// 🤖 3. LÓGICA MULTIASISTENCIA (LOGIN CORREGIDO)
// ==================================================================

async function runMultiFullScan(mes, anio) {
    let browser = null;
    const resultados = [];
    const noEncontrados = [];
    const valD1 = `${mes}_${anio}`;
    const valD2 = `${anio}`;

    try {
        console.log(`🚀 (MULTI) Iniciando: ${valD1}`);
        
        // 1. LOGIN (Usando tu lógica probada)
        const { browser: b, page } = await loginMulti();
        browser = b;

        // 2. IR A CERRADOS
        console.log("📂 (MULTI) Yendo a Cerrados...");
        await page.goto(URLS.MULTI_LIST, { waitUntil: 'domcontentloaded' });
        
        // 3. FILTRAR
        console.log(`📅 (MULTI) Filtrando...`);
        if (await page.isVisible('select[name="D1"]')) {
            await page.selectOption('select[name="D1"]', valD1);
            await page.selectOption('select[name="D2"]', valD2);
            await page.click('input[name="continuar"]'); 
            await page.waitForTimeout(2000);
        }

        // 4. RECORRER PÁGINAS
        let idsServicios = [];
        let tieneSiguiente = true;
        let pagActual = 1;

        while (tieneSiguiente && pagActual <= 5) { 
            console.log(`📄 (MULTI) Página ${pagActual}...`);
            const nuevosIds = await page.evaluate(() => {
                const celdas = Array.from(document.querySelectorAll('td.tdet'));
                const lista = [];
                celdas.forEach(td => {
                    const txt = td.innerText.trim();
                    if (/^\d{8}$/.test(txt)) lista.push(txt);
                });
                return lista;
            });
            idsServicios.push(...nuevosIds);
            
            // Botón Siguiente
            const haySiguiente = await page.evaluate(() => {
                const img = document.querySelector('img[src*="seguir.gif"]');
                if (img && img.parentElement.tagName === 'A') {
                    img.parentElement.click(); return true;
                }
                return false;
            });

            if (haySiguiente) { await page.waitForTimeout(3000); pagActual++; }
            else { tieneSiguiente = false; }
        }

        idsServicios = [...new Set(idsServicios)];
        console.log(`🔍 (MULTI) Servicios a analizar: ${idsServicios.length}`);

        if (idsServicios.length === 0) return { encontrados: [], noEncontrados: [] };

        // 5. DETALLES (PRESUPUESTO)
        for (const idServicio of idsServicios) {
            // Ir directo al presupuesto
            const urlPresupuesto = `https://web.multiasistencia.com/w3multi/valprincipal.php?reparacion=${idServicio}&modo=0`;
            
            try {
                await page.goto(urlPresupuesto, { timeout: 45000, waitUntil: 'domcontentloaded' });
                await page.waitForTimeout(1500); 

                const info = await page.evaluate(() => {
                    const clean = (t) => t ? t.trim() : "Desconocido";
                    let cliente = "", direccion = "", totalStr = "0";

                    // Datos Cliente (Bloques modernos o Tablas antiguas)
                    const bloques = Array.from(document.querySelectorAll('.policy-info-block'));
                    bloques.forEach(b => {
                        const t = b.querySelector('.policy-info-title')?.innerText.toUpperCase() || "";
                        const v = b.querySelector('.policy-info-value')?.innerText || "";
                        if (t.includes("CLIENTE")) cliente = v;
                        if (t.includes("DIRECCIÓN")) direccion = v;
                    });

                    if (!cliente) {
                        const tds = Array.from(document.querySelectorAll('td'));
                        for(let i=0; i<tds.length; i++) {
                            const txt = tds[i].innerText.toUpperCase();
                            if(txt.includes("NOMBRE CLIENTE") && tds[i+1]) cliente = tds[i+1].innerText;
                            if(txt.includes("DIRECCIÓN") && tds[i+1]) direccion = tds[i+1].innerText;
                        }
                    }

                    // Total Dinero
                    const celdaTotal = document.querySelector('td[data-label*="TOTAL REPARACION"]');
                    if (celdaTotal) totalStr = celdaTotal.innerText;
                    else {
                        const allTd = Array.from(document.querySelectorAll('td, th, div'));
                        const header = allTd.find(el => el.innerText && el.innerText.includes("TOTAL REPARACION"));
                        if (header) {
                            if(header.tagName==='TD' || header.tagName==='TH') {
                                if(header.nextElementSibling) totalStr = header.nextElementSibling.innerText;
                            } else {
                                totalStr = header.innerText.replace("TOTAL REPARACION", "").replace(":", "");
                            }
                        }
                    }
                    return { cliente: clean(cliente), direccion: clean(direccion), totalStr };
                });

                let importe = 0;
                if (info.totalStr) {
                    let cleanMoney = info.totalStr.replace(/[^\d.,-]/g, '').replace(',', '.');
                    importe = Math.abs(parseFloat(cleanMoney) || 0);
                }

                if (db) {
                    const q = await db.collection(APPOINTMENTS_COL).where("serviceNumber", "==", idServicio).get();
                    if (!q.empty) {
                        q.forEach(doc => {
                            resultados.push({ servicio: idServicio, direccion: info.direccion, importe, docId: doc.id });
                        });
                    } else {
                        noEncontrados.push({ servicio: idServicio, direccion: info.direccion, importe });
                    }
                }

            } catch (errDetail) { console.error(`   ⚠️ Error ${idServicio}: ${errDetail.message}`); }
        }

        return { encontrados: resultados, noEncontrados };

    } catch (e) { throw e; } finally { if(browser) await browser.close(); }
}

async function loginMulti() {
    let user = "", pass = "";
    if (db) {
        const doc = await db.collection("providerCredentials").doc("multiasistencia").get();
        if (doc.exists) { user = doc.data().user; pass = doc.data().pass; }
    }
    if(!user) throw new Error("Faltan credenciales Multiasistencia en Firebase");

    const browser = await chromium.launch({ headless: true, args: ['--no-sandbox'] });
    const context = await browser.newContext({ userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36' });
    const page = await context.newPage();

    console.log("🌍 (MULTI) Entrando al login...");
    await page.goto(URLS.MULTI_LOGIN, { waitUntil: 'networkidle', timeout: 60000 });

    // TU LÓGICA DE LOGIN QUE FUNCIONA
    const userFilled = await page.evaluate((u) => {
      const el = document.querySelector('input[name="usuario"]') || document.querySelector('input[type="text"]');
      if (el) {
        el.value = u;
        el.dispatchEvent(new Event('input', { bubbles: true }));
        return true;
      }
      return false;
    }, user);

    if (!userFilled) await page.fill('input[name="usuario"]', user);
    await page.fill('input[type="password"]', pass);
    await page.click('input[type="submit"]');
    await page.waitForTimeout(4000);
    
    console.log("✅ (MULTI) Login OK");
    return { browser, page };
}

// ==================================================================
// 🤖 4. LÓGICA HOMESERVE (Mantenida igual)
// ==================================================================
async function runHSScanner() {
    let browser = null;
    try {
        const { browser: b, page } = await loginHS();
        browser = b;
        const liquidaciones = await page.evaluate(() => {
            const links = Array.from(document.querySelectorAll('a'));
            const results = [];
            links.forEach(l => {
                const txt = l.innerText.trim();
                if (/\d{2}\/\d{2}\/\d{4}/.test(txt)) results.push({ fecha: txt, url: l.href });
            });
            return results;
        });
        return liquidaciones;
    } catch (e) { throw e; } finally { if(browser) await browser.close(); }
}

async function runHSAnalyzer(targetUrl) {
    let browser = null;
    try {
        const { browser: b, page } = await loginHS(); 
        browser = b;
        await page.goto(targetUrl, { timeout: 60000 });
        await page.waitForTimeout(1500);
        const botonPulsado = await page.evaluate(() => {
            const elementos = Array.from(document.querySelectorAll('input, button, a'));
            const target = elementos.find(el => {
                const txt = (el.value || el.innerText || "").toUpperCase();
                return txt.includes("SERVICIO") && txt.includes("DESGLOSE");
            });
            if (target) { target.click(); return true; }
            return false;
        });
        if (botonPulsado) await page.waitForTimeout(3000);
        const datosRaw = await page.evaluate(() => {
            const filas = Array.from(document.querySelectorAll('tr'));
            const datos = [];
            filas.forEach(tr => {
                const tds = tr.querySelectorAll('td');
                if (tds.length >= 6) {
                    const servicio = tds[0].innerText.trim();
                    const direccion = tds[1].innerText.trim();
                    const saldoRaw = tds[5].innerText.trim();
                    if (/^\d{5,}$/.test(servicio)) datos.push({ servicio, direccion, saldoRaw });
                }
            });
            return datos;
        });
        const encontrados = []; const noEncontrados = [];
        if (db) {
            for (const item of datosRaw) {
                let cleanSaldo = item.saldoRaw.replace(/[^\d.-]/g, '');
                let importe = Math.abs(parseFloat(cleanSaldo) || 0);
                const q = await db.collection(APPOINTMENTS_COL).where("serviceNumber", "==", item.servicio).get();
                if (!q.empty) {
                    q.forEach(doc => encontrados.push({ servicio: item.servicio, direccion: item.direccion, importe: importe, docId: doc.id }));
                } else {
                    noEncontrados.push({ servicio: item.servicio, direccion: item.direccion, importe: importe });
                }
            }
        }
        return { encontrados, noEncontrados };
    } catch (e) { throw e; } finally { if(browser) await browser.close(); }
}

async function loginHS() {
    let user = "", pass = "";
    if (db) {
        const doc = await db.collection("providerCredentials").doc("homeserve").get();
        if (doc.exists) { user = doc.data().user; pass = doc.data().pass; }
    }
    const browser = await chromium.launch({ headless: true, args: ['--no-sandbox'] });
    const page = await browser.newPage();
    await page.goto(URLS.HS_LOGIN, { timeout: 60000 });
    if (await page.isVisible('input[name="CODIGO"]')) {
        await page.fill('input[name="CODIGO"]', user);
        await page.fill('input[type="password"]', pass);
        await page.keyboard.press('Enter');
        await page.waitForTimeout(4000);
    }
    await page.goto(URLS.HS_LIQ);
    await page.waitForTimeout(2000);
    return { browser, page };
}

// 💾 GUARDADOR
async function runSaver(items, providerType) {
    if (!db) return 0;
    const batch = db.batch();
    const nowISO = new Date().toISOString();
    let count = 0;
    items.forEach(item => {
        const ref = db.collection(APPOINTMENTS_COL).doc(item.docId);
        const updateData = {
            paidAmount: item.importe,
            paymentState: "Pagado",
            status: 'completed',
            paymentDate: nowISO,
            lastUpdatedByRobot: nowISO
        };
        if (providerType === 'MULTI') updateData.multiasistenciaPaymentStatus = 'paid_verified';
        else updateData.homeservePaymentStatus = 'paid_saldo';
        batch.update(ref, updateData);
        count++;
    });
    await batch.commit();
    return count;
}

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => console.log(`🚀 Server on port ${PORT}`));