// dbConnect.js
import mongoose from "mongoose";

const MONGODB_URI = process.env.MONGODB_URI;
const DB_NAME = process.env.MONGODB_DB_NAME || "mydatabase";

console.log("DB_NAME", DB_NAME, MONGODB_URI);

if (!MONGODB_URI) {
  throw new Error(
    "Please define the MONGODB_URI environment variable inside .env.local"
  );
}

let cached = global.mongoose;

if (!cached) {
  cached = global.mongoose = { conn: null, promise: null };
}

async function dbConnect() {
  console.log(666);

  if (cached.conn) {
    console.log("Using cached database connection");
    return cached.conn;
  }

  console.log(777);

  if (!cached.promise) {
    console.log(888);

    const opts = {
      bufferCommands: false,
      dbName: DB_NAME,
    };

    console.log("Attempting to connect to MongoDB...");
    cached.promise = mongoose
      .connect(MONGODB_URI, opts)
      .then((mongoose) => {
        console.log(`Connected to MongoDB database: ${DB_NAME}`);
        return mongoose;
      })
      .catch((error) => {
        console.error("Error connecting to MongoDB:", error);
        throw error;
      });
  }

  console.log(999);

  try {
    cached.conn = await cached.promise;
  } catch (e) {
    cached.promise = null;
    console.error("Failed to connect to MongoDB:", e);
    throw e;
  }

  return cached.conn;
}

export default dbConnect;