/**
 * Ensure soft-delete field + unique email index only among active participants.
 * Usage (from backend/): node scripts/ensure-participant-soft-delete-index.js
 */
require('dotenv').config();
const mongoose = require('mongoose');
const Participant = require('../src/models/Participant');

async function main() {
  const uri = process.env.MONGODB_URI || process.env.MONGO_URI;
  if (!uri) {
    console.error('Set MONGODB_URI or MONGO_URI');
    process.exit(1);
  }
  await mongoose.connect(uri);
  const col = mongoose.connection.collection('participants');

  const backfill = await col.updateMany(
    { deletedAt: { $exists: false } },
    { $set: { deletedAt: null } }
  );
  console.log(`Backfilled deletedAt=null on ${backfill.modifiedCount} participants`);

  const indexes = await col.indexes();
  for (const idx of indexes) {
    if (idx.name === 'tenantOrganization_1_email_1') {
      try {
        await col.dropIndex('tenantOrganization_1_email_1');
        console.log('Dropped legacy index tenantOrganization_1_email_1');
      } catch (e) {
        console.warn('Could not drop legacy index:', e.message);
      }
    }
  }

  const synced = await Participant.syncIndexes();
  console.log('syncIndexes:', synced);
  await mongoose.disconnect();
}

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