wg-verwaltung/backend/prisma/seed.ts

import { PrismaClient, UserRole, RoomStatus } from '@prisma/client';
import bcrypt from 'bcryptjs';

const prisma = new PrismaClient();

// Demo-Passwörter — nur für die Testdaten, sollten in Produktion geändert werden.
const LANDLORD_DEMO_PASSWORD = 'Vermieter2026!';
const TENANT_DEMO_PASSWORD = 'Mieter2026!';

/**
 * Erzeugt Testdaten für die lokale Entwicklung:
 * - 1 Vermieter
 * - 4 Zimmer (3x 20qm, 1x 16qm) passend zur Nackenheim-WG
 * - 4 Mieter mit aktivem Vertrag je Zimmer
 * - je 1 offene Mietzahlung für den aktuellen Monat (für den Banking-Test)
 */
async function main() {
  const existingUsers = await prisma.user.count();
  if (existingUsers > 0) {
    console.log('Seed: Datenbank enthält bereits Daten, überspringe Seed.');
    return;
  }

  console.log('Seed: lege Testdaten an...');

  const landlord = await prisma.user.create({
    data: {
      email: 'vermieter@example.com',
      passwordHash: await bcrypt.hash(LANDLORD_DEMO_PASSWORD, 12),
      fullName: 'Giuseppe Lombardo',
      role: UserRole.LANDLORD,
    },
  });

  const roomDefs = [
    { roomNumber: 'Zimmer 1', sizeSqm: 20.0, baseRent: 420, utilityPauschal: 130 },
    { roomNumber: 'Zimmer 2', sizeSqm: 20.0, baseRent: 420, utilityPauschal: 130 },
    { roomNumber: 'Zimmer 3', sizeSqm: 20.0, baseRent: 420, utilityPauschal: 130 },
    { roomNumber: 'Zimmer 4', sizeSqm: 16.0, baseRent: 360, utilityPauschal: 120 },
  ];

  const tenantNames = ['Anna Schmidt', 'Ben Keller', 'Clara Wagner', 'David Hoffmann'];

  for (let i = 0; i < roomDefs.length; i++) {
    const def = roomDefs[i];
    const room = await prisma.room.create({
      data: {
        roomNumber: def.roomNumber,
        sizeSqm: def.sizeSqm,
        baseRent: def.baseRent,
        utilityPauschal: def.utilityPauschal,
        status: RoomStatus.OCCUPIED,
      },
    });

    const tenant = await prisma.user.create({
      data: {
        email: `mieter${i + 1}@example.com`,
        passwordHash: await bcrypt.hash(TENANT_DEMO_PASSWORD, 12),
        fullName: tenantNames[i],
        role: UserRole.TENANT,
        roomId: room.id,
      },
    });

    const totalWarmRent = def.baseRent + def.utilityPauschal;

    const contract = await prisma.contract.create({
      data: {
        userId: tenant.id,
        roomId: room.id,
        startDate: new Date('2025-10-01'),
        totalWarmRent,
        depositAmount: totalWarmRent * 3,
        isActive: true,
      },
    });

    const now = new Date();
    await prisma.payment.create({
      data: {
        contractId: contract.id,
        amount: totalWarmRent,
        dueDate: new Date(now.getFullYear(), now.getMonth(), 3),
      },
    });
  }

  console.log('Seed abgeschlossen.');
  console.log(`Vermieter-Login (Demo): ${landlord.email} / ${LANDLORD_DEMO_PASSWORD}`);
  console.log(`Mieter-Login (Demo, z.B. mieter1@example.com): ${TENANT_DEMO_PASSWORD}`);
}

main()
  .catch((e) => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });