/**
 * Find duplicate churches using ChromaDB semantic similarity.
 *
 * Usage:
 *   npx tsx scripts/dedup-churches.ts                    # Dry run, show duplicates
 *   npx tsx scripts/dedup-churches.ts --threshold 0.15   # Custom similarity threshold
 *   npx tsx scripts/dedup-churches.ts --country US       # Only check US churches
 *   npx tsx scripts/dedup-churches.ts --limit 100        # Check first 100 churches
 */

import { Pool } from 'pg';
import { PrismaPg } from '@prisma/adapter-pg';
import { PrismaClient } from '@prisma/client';
import { findSimilarChurches } from '../src/chromadb/queries';

const pool = new Pool({ connectionString: process.env.DATABASE_URL });
const adapter = new PrismaPg(pool);
const prisma = new PrismaClient({ adapter });

const args = process.argv.slice(2);
const threshold = args.includes('--threshold')
  ? parseFloat(args[args.indexOf('--threshold') + 1])
  : 0.15; // Cosine distance threshold (lower = more similar)
const country = args.includes('--country')
  ? args[args.indexOf('--country') + 1]
  : undefined;
const limit = args.includes('--limit')
  ? parseInt(args[args.indexOf('--limit') + 1])
  : 500;

async function main() {
  console.log(`Finding duplicate churches (threshold=${threshold}, country=${country || 'all'}, limit=${limit})`);
  console.log('---');

  const churches = await prisma.church.findMany({
    take: limit,
    where: country ? { country } : undefined,
    orderBy: { name: 'asc' },
    select: {
      id: true,
      name: true,
      address: true,
      city: true,
      country: true,
      source: true,
      latitude: true,
      longitude: true,
      _count: { select: { massSchedules: true } },
    },
  });

  console.log(`Checking ${churches.length} churches...\n`);

  const seen = new Set<string>();
  let duplicateCount = 0;

  for (const church of churches) {
    if (seen.has(church.id)) continue;

    const text = `${church.name} ${church.address || ''} ${church.city || ''} ${church.country}`.trim();
    const similar = await findSimilarChurches(text, {
      country: church.country,
      nResults: 5,
    });

    // Filter to matches within threshold, excluding self
    const matches = similar.filter(
      (s) => s.churchId !== church.id && s.distance <= threshold
    );

    if (matches.length > 0) {
      duplicateCount++;
      console.log(`\nPotential duplicate #${duplicateCount}:`);
      console.log(`  Original: "${church.name}" (${church.city || 'no city'}, ${church.country})`);
      console.log(`    ID: ${church.id}, Source: ${church.source}, Schedules: ${church._count.massSchedules}`);
      console.log(`    Lat/Lng: ${church.latitude}, ${church.longitude}`);

      for (const match of matches) {
        console.log(`  Match: "${match.document}" (distance: ${match.distance.toFixed(4)})`);
        console.log(`    ID: ${match.churchId}`);
        seen.add(match.churchId);
      }
    }
  }

  console.log(`\n---`);
  console.log(`Found ${duplicateCount} potential duplicate groups from ${churches.length} churches`);
  console.log(`Threshold: ${threshold} (lower = stricter matching)`);

  await prisma.$disconnect();
  await pool.end();
}

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