// IMPORTANT: Storing connection strings directly in code is insecure for production.
// This connection string should be moved to an environment variable (e.g., in a .env file)
// and accessed via `process.env.MONGODB_URI`.
// Example for .env:
// MONGODB_URI="mongodb+srv://davidcyril209:YOUR_PASSWORD_HERE@david.sfonwmo.mongodb.net/?retryWrites=true&w=majority&appName=David"
// Make sure to replace YOUR_PASSWORD_HERE with your actual password.

import { MongoClient, ServerApiVersion } from 'mongodb';

const MONGODB_URI = "mongodb+srv://davidcyril209:85200555dcx@david.sfonwmo.mongodb.net/?retryWrites=true&w=majority&appName=David";

if (!MONGODB_URI) {
  throw new Error(
    'Please define the MONGODB_URI environment variable inside .env or provide it directly'
  );
}

// Create a MongoClient with a MongoClientOptions object to set the Stable API version
const client = new MongoClient(MONGODB_URI, {
  serverApi: {
    version: ServerApiVersion.v1,
    strict: true,
    deprecationErrors: true,
  }
});

let clientPromise: Promise<MongoClient>;

if (process.env.NODE_ENV === 'development') {
  // In development mode, use a global variable so that the value
  // is preserved across module reloads caused by HMR (Hot Module Replacement).
  // @ts-ignore
  if (!global._mongoClientPromise) {
    // @ts-ignore
    global._mongoClientPromise = client.connect();
  }
  // @ts-ignore
  clientPromise = global._mongoClientPromise;
} else {
  // In production mode, it's best to not use a global variable.
  clientPromise = client.connect();
}

// Export a module-scoped MongoClient promise. By doing this in a
// separate module, the client can be shared across functions.
export default clientPromise;

export async function getDb() {
  const client = await clientPromise;
  // The database name can be part of the connection string or specified here.
  // If your connection string includes a database name (e.g., /myDatabaseName?),
  // MongoDB driver might use that. Otherwise, you need to specify it.
  const uriParts = MONGODB_URI.split('/');
  const dbNameFromUri = uriParts[uriParts.length-1]?.split('?')[0];
  
  // Use the database name from the URI if it's present and not a generic part of the query string.
  // Otherwise, default to 'anitaDeployDB'.
  const dbName = (dbNameFromUri && !dbNameFromUri.includes("retryWrites")) ? dbNameFromUri : 'anitaDeployDB';

  return client.db(dbName);
}