import mongoose from 'mongoose';

// Desactivar bufferCommands para que las operaciones fallen de inmediato y usen el almacenamiento autónomo si MongoDB está offline
mongoose.set('bufferCommands', false);

const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/transporte_cali_buenaventura';

let isConnected = false;

export function isDatabaseConnected(): boolean {
  return mongoose.connection.readyState === 1;
}

export async function connectDatabase(): Promise<typeof mongoose> {
  if (mongoose.connection.readyState === 1) {
    isConnected = true;
    return mongoose;
  }

  try {
    const conn = await mongoose.connect(MONGODB_URI, {
      autoIndex: true, // Asegura que los índices 2dsphere se construyan automáticamente
      serverSelectionTimeoutMS: 2500, // Timeout rápido para no retrasar la API
      connectTimeoutMS: 4000,
    });

    isConnected = true;
    console.log(`✅ [MongoDB Self-Hosted] Conexión establecida exitosamente a: ${conn.connection.host}`);
    return conn;
  } catch (error) {
    isConnected = false;
    console.error('❌ [MongoDB Error] Fallo al conectar a la base de datos geoespacial:', error);
    throw error;
  }
}

export async function disconnectDatabase(): Promise<void> {
  if (!isConnected) return;
  await mongoose.disconnect();
  isConnected = false;
  console.log('🔌 [MongoDB] Desconectado.');
}