import { NextResponse } from 'next/server';
import { prisma } from '@/lib/prisma';
import { getLatestEmail } from '@/lib/mail';
import { sendTelegramNotification } from '@/lib/notifications';

// Bu kısım normalde .env içinde olmalı
const WEBHOOK_SECRET = 'besiktasK1903*';
const IMAP_PASSWORD = process.env.MAILCOW_MASTER_PASSWORD || ''; // Dovecot Master Password tavsiye edilir

export async function POST(request: Request) {
  const secret = request.headers.get('x-ayristech-secret');

  if (secret !== WEBHOOK_SECRET) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const body = await request.json();
  const { to, event, timestamp } = body;

  console.log(`📩 Webhook Sinyali Alındı! Alıcı: ${to}`);

  try {
    // 1. Mailbox Mapping kontrolü
    const mapping = await prisma.mailboxMapping.findUnique({
      where: { email: to },
      include: { user: true }
    });

    if (!mapping) {
      console.log(`[Signal] Mapping bulunamadı: ${to}`);
      return NextResponse.json({ success: true, message: 'No mapping found' });
    }

    // 2. Mailcow'dan son maili çek
    // Not: Master password kullanılıyorsa format 'user@domain.tld*master@domain.tld' şeklindedir
    const loginUser = IMAP_PASSWORD ? `${to}*${process.env.MAILCOW_MASTER_USER || 'admin'}` : to;
    const mailData = await getLatestEmail(to, IMAP_PASSWORD);

    if (!mailData) {
      console.error(`[Signal] Mail içeriği çekilemedi: ${to}`);
      return NextResponse.json({ success: false, error: 'Could not fetch mail' }, { status: 500 });
    }

    console.log(`[Signal] Mail Çekildi: "${mailData.subject}"`);

    // 3. İçerik Analizi (BMW, Penti vb.)
    let processed = false;
    let extraInfo = "";
    const content = (mailData.subject + " " + mailData.text).toLowerCase();

    if (content.includes("bmw") || content.includes("tamir")) {
      console.log("🚗 [Signal] BMW/Tamir içerikli mail tespit edildi!");
      extraInfo = "🚗 BMW/Tamir İlgili İçerik";
      processed = true;
    }

    if (content.includes("penti") || content.includes("sipariş")) {
      console.log("🛍️ [Signal] Penti/Sipariş içerikli mail tespit edildi!");
      extraInfo = "🛍️ Penti/Sipariş İlgili İçerik";
      processed = true;
    }

    // 4. Bildirim Gönder (Telegram)
    const notificationResult = await sendTelegramNotification(
      mapping.userId,
      to,
      mailData.from,
      mailData.subject,
      extraInfo
    );

    // 5. Bildirim Logu
    await prisma.notificationLog.create({
      data: {
        mailbox: to,
        sender: mailData.from,
        subject: mailData.subject,
        status: notificationResult.status,
        userId: mapping.userId,
        error: notificationResult.error || (processed ? null : "Anahtar kelime eşleşmedi")
      }
    });

    return NextResponse.json({ 
      success: true, 
      processed,
      notification: notificationResult.status,
      subject: mailData.subject 
    });

  } catch (error: any) {
    console.error("[Signal Webhook] Hata:", error.message);
    return NextResponse.json({ error: error.message }, { status: 500 });
  }
}