// This script performs the migration of lastPriceUpdate and lastPriceDate fields
// to the operations tracking system

// Since authentication is required, you'll need to run this script with proper MongoDB credentials
// Update the connection string below with your authentication details

const MONGODB_URI = 'mongodb://username:password@localhost:27017/stock?authSource=admin';
// Or use environment variable: process.env.MONGODB_URI

async function runMigration() {
  console.log(`
========================================
PRICE TRACKING MIGRATION SCRIPT
========================================

This script will migrate lastPriceUpdate and lastPriceDate fields
from eodSymbols collection to the operations tracking system.

To run this migration:

1. Update the MONGODB_URI in this file with your MongoDB credentials
   OR set the MONGODB_URI environment variable

2. Run the script:
   node run-price-migration.js

The script will:
- Find all documents with lastPriceUpdate field
- Convert dates to normalized format (00:00:00 UTC)
- Create operations.price_update structure
- Process in batches of 1000 documents

Total documents to migrate: ~199,175

Migration query that will be executed:
`);

  console.log(`
db.eodSymbols.find({ 
  lastPriceUpdate: { $exists: true }, 
  'operations.price_update': { $exists: false }
}).forEach(doc => {
  const normalizedDate = new Date(doc.lastPriceUpdate);
  normalizedDate.setUTCHours(0, 0, 0, 0);
  
  let lastRecordDate = null;
  if (doc.lastPriceDate) {
    try {
      lastRecordDate = new Date(doc.lastPriceDate);
    } catch (e) {}
  }
  
  db.eodSymbols.updateOne(
    { _id: doc._id },
    {
      $set: {
        'operations.price_update': {
          lastRunAt: normalizedDate,
          lastSuccessAt: normalizedDate,
          status: 'success',
          ...(lastRecordDate && { lastRecordDate })
        }
      }
    }
  );
});
`);

  console.log(`
After migration, you can optionally remove old fields:
db.eodSymbols.updateMany({}, { $unset: { lastPriceUpdate: '', lastPriceDate: '' } })

To verify migration:
db.eodSymbols.findOne({ 'operations.price_update': { $exists: true } })
`);
}

runMigration();