#!/usr/bin/env node

/**
 * Recalculate all ELO ratings and partnership stats
 * 
 * This script rebuilds all player stats and partnership stats from scratch
 * by processing all matches in chronological order.
 */

const { PrismaClient } = require('@prisma/client');
const { recalculateAllElo } = require('../src/lib/elo-utils');

const prisma = new PrismaClient();

async function main() {
  console.log('Starting ELO recalculation...');
  console.log('This will delete all existing stats and rebuild them from match history.');
  console.log('');

  try {
    // Confirm before proceeding
    const readline = require('readline').createInterface({
      input: process.stdin,
      output: process.stdout
    });

    const confirm = await new Promise(resolve => {
      readline.question('Are you sure you want to proceed? (yes/no): ', resolve);
    });
    readline.close();

    if (confirm.toLowerCase() !== 'yes') {
      console.log('Operation cancelled.');
      return;
    }

    console.log('Recalculating stats...');
    const result = await recalculateAllElo(prisma);

    console.log('\nRecalculation complete!');
    console.log(`- Matches processed: ${result.matchesProcessed}`);
    console.log(`- Players updated: ${result.playersUpdated}`);
    console.log(`- Partnerships updated: ${result.partnershipsUpdated}`);

  } catch (error) {
    console.error('Error during recalculation:', error);
    process.exit(1);
  } finally {
    await prisma.$disconnect();
  }
}

main();