import { prisma } from './prisma';
import { sendInitialBookingEmail } from './email-service';
import { nextcloudCalendar } from './nextcloud-calendar';
import { lexofficeService } from './lexoffice';
import { generateContractFromTemplate } from './pdf-template-service';

export class BookingAutomationService {
  async runPostBookingActions(bookingId: string): Promise<{
    emailSent: boolean;
    calendarSynced: boolean;
    lexofficeCreated: boolean;
    contractGenerated: boolean;
    errors: string[];
  }> {
    const errors: string[] = [];
    let emailSent = false;
    let calendarSynced = false;
    let lexofficeCreated = false;
    let contractGenerated = false;

    try {
      const booking = await prisma.booking.findUnique({
        where: { id: bookingId },
        include: {
          location: true,
          photobox: true,
          bookingEquipment: {
            include: {
              equipment: true,
            },
          },
        },
      });

      if (!booking) {
        errors.push('Buchung nicht gefunden');
        return { emailSent, calendarSynced, lexofficeCreated, contractGenerated, errors };
      }

      let priceConfig = null;
      if (booking.photobox?.model && booking.locationId) {
        priceConfig = await prisma.priceConfig.findUnique({
          where: {
            locationId_model: {
              locationId: booking.locationId,
              model: booking.photobox.model,
            },
          },
        });
      }

      const bookingWithPriceConfig = {
        ...booking,
        priceConfig,
      };

      console.log(`🤖 Automatische Aktionen für Buchung ${booking.bookingNumber}...`);

      let quotationPdf: Buffer | null = null;
      let contractPdf: Buffer | null = null;

      // 1. LexOffice Contact + Quotation erstellen
      try {
        console.log('   💼 Erstelle LexOffice-Kontakt und Angebot...');
        
        const contactId = await lexofficeService.createContactFromBooking(bookingWithPriceConfig);
        console.log(`   ✅ LexOffice-Kontakt erstellt: ${contactId}`);
        
        const quotationId = await lexofficeService.createQuotationFromBooking(bookingWithPriceConfig, contactId);
        console.log(`   ✅ LexOffice-Angebot erstellt: ${quotationId}`);
        
        await prisma.booking.update({
          where: { id: booking.id },
          data: {
            lexofficeContactId: contactId,
            lexofficeOfferId: quotationId,
          },
        });

        quotationPdf = await lexofficeService.getQuotationPDF(quotationId);
        console.log('   ✅ Angebots-PDF heruntergeladen');
        
        lexofficeCreated = true;
      } catch (error: any) {
        console.error('   ❌ LexOffice Fehler:', error.message);
        errors.push(`LexOffice: ${error.message}`);
      }

      // 2. Mietvertrag-PDF generieren
      try {
        console.log('   📄 Generiere Mietvertrag-PDF...');
        
        contractPdf = await generateContractFromTemplate(
          bookingWithPriceConfig,
          booking.location,
          booking.photobox
        );
        
        await prisma.booking.update({
          where: { id: booking.id },
          data: {
            contractGenerated: true,
            contractGeneratedAt: new Date(),
          },
        });

        console.log('   ✅ Mietvertrag-PDF generiert');
        contractGenerated = true;
      } catch (error: any) {
        console.error('   ❌ PDF-Generierung Fehler:', error.message);
        errors.push(`PDF: ${error.message}`);
      }

      // 3. E-Mail mit Angebot + Vertrag versenden
      if (quotationPdf && contractPdf) {
        try {
          console.log('   📧 Sende E-Mail mit Angebot und Vertrag...');
          
          await sendInitialBookingEmail(bookingWithPriceConfig, quotationPdf, contractPdf);
          
          await prisma.booking.update({
            where: { id: booking.id },
            data: {
              contractSentAt: new Date(),
            },
          });

          emailSent = true;
          console.log('   ✅ E-Mail gesendet');
        } catch (error: any) {
          console.error('   ❌ E-Mail Fehler:', error.message);
          errors.push(`E-Mail: ${error.message}`);
        }
      } else {
        console.warn('   ⚠️  E-Mail nicht gesendet - PDFs fehlen');
        errors.push('E-Mail: PDFs nicht verfügbar');
      }

      // 4. Automatischer Nextcloud Kalender-Sync
      try {
        console.log('   📅 Synchronisiere mit Nextcloud-Kalender...');
        
        await nextcloudCalendar.syncBookingToCalendar(booking);
        
        await prisma.booking.update({
          where: { id: booking.id },
          data: {
            calendarSynced: true,
            calendarSyncedAt: new Date(),
          },
        });

        calendarSynced = true;
        console.log('   ✅ Kalender synchronisiert');
      } catch (error: any) {
        console.error('   ❌ Kalender-Sync Fehler:', error.message);
        errors.push(`Kalender: ${error.message}`);
      }

      // 5. Admin-Benachrichtigung erstellen
      try {
        await prisma.notification.create({
          data: {
            type: 'NEW_BOOKING',
            title: 'Neue Buchungsanfrage',
            message: `${booking.customerName} hat eine ${booking.photobox?.model || 'Fotobox'} für ${booking.eventCity} am ${new Date(booking.eventDate).toLocaleDateString('de-DE')} angefragt.`,
            metadata: {
              bookingId: booking.id,
              bookingNumber: booking.bookingNumber,
            },
          },
        });
        console.log('   ✅ Admin-Benachrichtigung erstellt');
      } catch (error: any) {
        console.error('   ❌ Notification Fehler:', error.message);
      }

      console.log(`✅ Automatische Aktionen abgeschlossen (${errors.length} Fehler)`);

      return { emailSent, calendarSynced, lexofficeCreated, contractGenerated, errors };
    } catch (error: any) {
      console.error('❌ Booking Automation Fehler:', error);
      errors.push(error.message);
      return { emailSent, calendarSynced, lexofficeCreated, contractGenerated, errors };
    }
  }
}

export const bookingAutomationService = new BookingAutomationService();