/**
 * Prepares the end-to-end test database, then exits. Run before the e2e backend starts
 * (see playwright.config.ts): drops and recreates the database, applies the migrations,
 * and seeds settings, users and events. Writes e2e/.data/seed.json with the ids and
 * login tokens the tests use.
 *
 * Database: E2E_DATABASE_URL, or backend/.env's DATABASE_URL with "_e2e" added to the
 * database name. It is always a separate database — never the one you develop against.
 */
const path = require('path');
const fs = require('fs');
const { execSync } = require('child_process');

const root = path.join(__dirname, '..', '..');
const backend = path.join(root, 'backend');
const req = (m) => require(require.resolve(m, { paths: [backend] }));
req('dotenv').config({ path: path.join(backend, '.env') });

const { e2eDatabaseUrl } = require('./db-url');

async function recreateDatabase(url) {
  const { Client } = req('pg');
  const target = new URL(url);
  const dbName = decodeURIComponent(target.pathname.replace(/^\//, ''));
  if (!/_e2e$|^e2e|test/i.test(dbName)) throw new Error(`Refusing to reset "${dbName}" — the e2e database name must contain "e2e" or "test".`);
  const admin = new URL(url);
  admin.pathname = '/postgres';
  admin.search = '';
  const client = new Client({ connectionString: admin.toString() });
  await client.connect();
  await client.query(`DROP DATABASE IF EXISTS "${dbName}" WITH (FORCE)`);
  await client.query(`CREATE DATABASE "${dbName}"`);
  await client.end();
}

async function seed(url) {
  process.env.DATABASE_URL = url;
  const prisma = require(path.join(backend, 'src/config/db'));
  const { generateToken, hashPassword } = require(path.join(backend, 'src/config/auth'));
  const { generateTicketsForRegistration } = require(path.join(backend, 'src/utils/ticketUtils'));

  await prisma.appSetting.createMany({
    data: [
      { key: 'setup_complete', value: 'true' },
      { key: 'org_name', value: 'E2E Church' },
      { key: 'org_address', value: '1 Test Street, Pretoria' },
    ],
  });

  const password = await hashPassword('E2e-password-123');
  const mk = (role, name, email, phoneNumber) => prisma.user.create({
    data: { name, email, phoneNumber, role, password, isActive: true, updatedAt: new Date() },
  });
  const users = {
    admin: await mk('admin', 'Ada Admin', 'admin@e2e.test', '0820000001'),
    supervisor: await mk('supervisor', 'Sam Supervisor', 'supervisor@e2e.test', '0820000002'),
    staff: await mk('staff', 'Stan Staff', 'staff@e2e.test', '0820000003'),
    user: await mk('user', 'Thandi Test', 'user@e2e.test', '0820000004'),
  };

  const D = 86400000;
  const now = Date.now();
  const at = (days, hourUtc = 16, minute = 30) => {
    const d = new Date(now + days * D);
    d.setUTCHours(hourUtc, minute, 0, 0);
    return d;
  };

  const free = await prisma.event.create({
    data: {
      title: 'E2E Free Evening', description: 'A free evening for the tests.', startDate: at(1), endDate: at(1, 19),
      price: 0, location: '1 Test Street, Pretoria', createdById: users.supervisor.id,
      eventOptions: { create: [{ name: 'Entry', price: 0, isMainTicket: true }] },
    },
  });
  const paid = await prisma.event.create({
    data: {
      title: 'E2E Paid Conference', description: 'A paid one-day conference.', startDate: at(3, 7), endDate: at(3, 15),
      price: 150, location: '1 Test Street, Pretoria', createdById: users.supervisor.id,
      eventOptions: { create: [{ name: 'Conference ticket', price: 150, isMainTicket: true }] },
    },
  });

  // Multi-day: week 1 was a week ago, week 2 is in progress now, then three more weeks.
  const todayStart = new Date(now - 30 * 60 * 1000);
  const sessions = [-7, 0, 7, 14, 21].map((days, i) => {
    const startsAt = new Date(todayStart.getTime() + days * D);
    return { label: `Week ${i + 1}`, startsAt, endsAt: new Date(startsAt.getTime() + 90 * 60 * 1000), order: i };
  });
  const course = await prisma.event.create({
    data: {
      title: 'E2E Alpha Course', description: 'Five weekly evenings.', startDate: sessions[0].startsAt, endDate: sessions[4].endsAt,
      price: 300, location: '1 Test Street, Pretoria', createdById: users.supervisor.id,
      scheduleType: 'sessions', lateJoinEnabled: true, latePricing: 'prorata', checkInWindow: 'whole_day',
      certificatesEnabled: true,
      certificateConfig: { template: 'classic', title: 'Certificate of Completion', body: '{name} completed {event}.', rule: { type: 'count', value: 2 } },
      sessions: { create: sessions },
      eventOptions: { create: [{ name: 'Course ticket', price: 300, isMainTicket: true }] },
    },
    include: { sessions: { orderBy: { startsAt: 'asc' } }, eventOptions: true },
  });
  await prisma.event.update({ where: { id: course.id }, data: { lateJoinUntilSessionId: course.sessions[2].id } });

  // A drop-in class: three upcoming classes, booked per class (the first is full).
  const classes = [1, 8, 15].map((days, i) => {
    const startsAt = at(days, 16, 0);
    return { label: `Class ${i + 1}`, startsAt, endsAt: new Date(startsAt.getTime() + 60 * 60 * 1000), order: i, capacity: i === 0 ? 1 : null };
  });
  const dropIn = await prisma.event.create({
    data: {
      title: 'E2E Drop-in Class', description: 'Come to the classes you like.', startDate: classes[0].startsAt, endDate: classes[2].endsAt,
      price: 50, location: '1 Test Street, Pretoria', createdById: users.supervisor.id,
      scheduleType: 'sessions', attendanceMode: 'pick', waitlistEnabled: true,
      sessions: { create: classes },
      eventOptions: { create: [{ name: 'Drop-in', price: 50, isMainTicket: true, sessionMode: 'pick' }] },
    },
    include: { sessions: { orderBy: { startsAt: 'asc' } }, eventOptions: true },
  });
  // A conference sold per pass: people tick the days they'll come, one price for the pass.
  const days = [2, 3, 4].map((d, i) => {
    const startsAt = at(d, 7, 0);
    return { label: `Day ${i + 1}`, startsAt, endsAt: new Date(startsAt.getTime() + 8 * 60 * 60 * 1000), order: i };
  });
  const conference = await prisma.event.create({
    data: {
      title: 'E2E Conference', description: 'Three days; come to the days you can.', startDate: days[0].startsAt, endDate: days[2].endsAt,
      price: 200, location: '1 Test Street, Pretoria', createdById: users.supervisor.id,
      scheduleType: 'sessions', attendanceMode: 'pick',
      sessions: { create: days },
      eventOptions: { create: [{ name: 'Conference pass', price: 200, isMainTicket: true, sessionMode: 'all' }] },
    },
  });

  // Someone else already has the only place in class 1.
  await prisma.registration.create({
    data: {
      userId: users.staff.id, eventId: dropIn.id, status: 'paid',
      registrationOptions: { create: [{ eventOptionId: dropIn.eventOptions[0].id, quantity: 1, priceSnapshot: 50, sessionId: dropIn.sessions[0].id, tranches: { create: [{ quantity: 1, priceSnapshot: 50 }] } }] },
    },
  });

  // Thandi is booked on the course and was checked in for week 1.
  const reg = await prisma.registration.create({
    data: {
      userId: users.user.id, eventId: course.id, status: 'paid',
      registrationOptions: { create: [{ eventOptionId: course.eventOptions[0].id, quantity: 1, priceSnapshot: 300, tranches: { create: [{ quantity: 1, priceSnapshot: 300 }] } }] },
    },
  });
  await prisma.payment.create({ data: { amount: 300, method: 'cash', userId: users.user.id, registrationId: reg.id, eventId: course.id, recordedById: users.supervisor.id } });
  await generateTicketsForRegistration(reg.id);
  const ticket = await prisma.ticket.findFirst({ where: { eventId: course.id } });
  await prisma.ticketUsage.create({ data: { ticketId: ticket.id, scannedById: users.staff.id, sessionId: course.sessions[0].id, scannedAt: course.sessions[0].startsAt } });

  const out = {
    users: Object.fromEntries(Object.entries(users).map(([k, u]) => [k, { id: u.id, name: u.name, email: u.email, token: generateToken(u.id, u.role, u.tokenVersion || 0) }])),
    events: { free: free.id, paid: paid.id, course: course.id, dropIn: dropIn.id, conference: conference.id },
    course: { sessions: course.sessions.map(s => ({ id: s.id, label: s.label })), ticketId: ticket.id, qrCode: ticket.qrCode },
  };
  fs.mkdirSync(path.join(root, 'e2e', '.data'), { recursive: true });
  fs.writeFileSync(path.join(root, 'e2e', '.data', 'seed.json'), JSON.stringify(out, null, 2));
  await prisma.$disconnect?.();
}

(async () => {
  const url = e2eDatabaseUrl();
  await recreateDatabase(url);
  execSync('npx prisma migrate deploy', { cwd: backend, env: { ...process.env, DATABASE_URL: url }, stdio: 'ignore' });
  await seed(url);
  console.log('[e2e] Database ready:', new URL(url).pathname.slice(1));
  process.exit(0);
})().catch((e) => {
  console.error('[e2e] Preparing the database failed:', e);
  process.exit(1);
});