require('dotenv').config();
const mongoose = require('mongoose');
const { cyan, green, red, yellow } = require('colorette');

const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/candidate-portal';

async function main() {
  console.log(cyan('🔍 Testing MongoDB connection...'));

  try {
    // Connect to MongoDB
    await mongoose.connect(MONGODB_URI, {
      bufferCommands: false,
      serverSelectionTimeoutMS: 5000,
    });

    console.log(green('✅ Connected to MongoDB successfully!'));

    // Create a temporary test model
    const TestSchema = new mongoose.Schema({
      name: String,
      email: String,
      createdAt: {
        type: Date,
        default: Date.now
      }
    });

    // Define the model name with a timestamp to ensure uniqueness
    const modelName = `Test_${Date.now()}`;
    const Test = mongoose.model(modelName, TestSchema);

    // Create test document
    console.log(cyan('📝 Creating test document...'));
    const testDoc = await Test.create({
      name: 'Test User',
      email: `test-${Date.now()}@example.com`
    });
    console.log(green('✅ Created test document:'), testDoc._id.toString());

    // Read test document
    console.log(cyan('📖 Reading test document...'));
    const foundDoc = await Test.findById(testDoc._id);
    console.log(green('✅ Found test document:'), foundDoc.name);

    // Update test document
    console.log(cyan('🔄 Updating test document...'));
    const updatedDoc = await Test.findByIdAndUpdate(
      testDoc._id,
      { name: 'Updated Test User' },
      { new: true }
    );
    console.log(green('✅ Updated test document:'), updatedDoc.name);

    // Delete test document
    console.log(cyan('🗑️  Deleting test document...'));
    await Test.findByIdAndDelete(testDoc._id);
    const checkDeleted = await Test.findById(testDoc._id);
    console.log(green('✅ Test document deleted'), checkDeleted === null ? 'successfully' : 'failed');

    // Test collection operations
    console.log(cyan('📊 Testing collection operations...'));
    const collections = await mongoose.connection.db.listCollections().toArray();
    console.log(green('✅ Collections in database:'), collections.map(c => c.name).join(', '));

    console.log(green('✅ All MongoDB operations completed successfully!'));
  } catch (error) {
    console.error(red('❌ MongoDB Test Error:'), error);
  } finally {
    // Clean up connection
    await mongoose.disconnect();
    console.log(yellow('🔌 Disconnected from MongoDB'));
  }
}

main().catch(console.error);