const { PrismaClient } = require('../generated/prisma');

async function main() {
  const prisma = new PrismaClient();
  const players = await prisma.player.findMany();
  const usedUsernames = new Set();

  for (const player of players) {
    let base = player.email.split('@')[0];
    let username = base;
    let i = 1;
    // Ensure uniqueness
    while (usedUsernames.has(username) || await prisma.player.findUnique({ where: { username } })) {
      username = `${base}${i}`;
      i++;
    }
    usedUsernames.add(username);
    await prisma.player.update({ where: { id: player.id }, data: { username } });
    console.log(`Set username for ${player.email}: ${username}`);
  }
  await prisma.$disconnect();
}

main().catch(e => { console.error(e); process.exit(1); });