require('dotenv').config();
const db = require('../models');
const { User } = db;

async function testUserModel() {
  console.log('\n🧪 Testing User Model...\n');

  try {
    // Test 1: Create a test user
    console.log('Test 1: Creating a test user...');
    const testUser = await User.create({
      username: 'testuser',
      email: 'test@example.com',
      password: 'password123',
      role: 'user'
    });
    console.log('✅ User created successfully');
    console.log('   - ID:', testUser.id);
    console.log('   - Username:', testUser.username);
    console.log('   - Email:', testUser.email);
    console.log('   - Role:', testUser.role);
    console.log('   - Password hashed:', testUser.password.substring(0, 20) + '...');
    console.log('   - Password length:', testUser.password.length);

    // Test 2: Verify password hashing
    console.log('\nTest 2: Testing password hashing...');
    const isPasswordHashed = testUser.password !== 'password123';
    console.log('✅ Password is hashed:', isPasswordHashed);
    console.log('   - Original: password123');
    console.log('   - Hashed:', testUser.password.substring(0, 30) + '...');

    // Test 3: Test password comparison
    console.log('\nTest 3: Testing password comparison...');
    const isCorrectPassword = await testUser.comparePassword('password123');
    const isWrongPassword = await testUser.comparePassword('wrongpassword');
    console.log('✅ Correct password:', isCorrectPassword);
    console.log('✅ Wrong password rejected:', !isWrongPassword);

    // Test 4: Test toJSON (password should be excluded)
    console.log('\nTest 4: Testing toJSON (password exclusion)...');
    const userJSON = testUser.toJSON();
    const hasPassword = 'password' in userJSON;
    console.log('✅ Password excluded from JSON:', !hasPassword);
    console.log('   JSON keys:', Object.keys(userJSON).join(', '));

    // Test 5: Test findByEmail
    console.log('\nTest 5: Testing findByEmail...');
    const foundUser = await User.findByEmail('test@example.com');
    console.log('✅ User found by email:', foundUser ? 'Yes' : 'No');
    console.log('   - Username:', foundUser.username);

    // Test 6: Test findByUsername
    console.log('\nTest 6: Testing findByUsername...');
    const foundByUsername = await User.findByUsername('testuser');
    console.log('✅ User found by username:', foundByUsername ? 'Yes' : 'No');

    // Test 7: Test streak calculation
    console.log('\nTest 7: Testing streak calculation...');
    testUser.updateStreak();
    console.log('✅ Streak updated');
    console.log('   - Current streak:', testUser.currentStreak);
    console.log('   - Longest streak:', testUser.longestStreak);
    console.log('   - Last quiz date:', testUser.lastQuizDate);

    // Test 8: Test accuracy calculation
    console.log('\nTest 8: Testing accuracy calculation...');
    testUser.totalQuestionsAnswered = 10;
    testUser.correctAnswers = 8;
    const accuracy = testUser.calculateAccuracy();
    console.log('✅ Accuracy calculated:', accuracy + '%');

    // Test 9: Test pass rate calculation
    console.log('\nTest 9: Testing pass rate calculation...');
    testUser.totalQuizzes = 5;
    testUser.quizzesPassed = 4;
    const passRate = testUser.getPassRate();
    console.log('✅ Pass rate calculated:', passRate + '%');

    // Test 10: Test unique constraints
    console.log('\nTest 10: Testing unique constraints...');
    try {
      await User.create({
        username: 'testuser', // Duplicate username
        email: 'another@example.com',
        password: 'password123'
      });
      console.log('❌ Unique constraint not working');
    } catch (error) {
      if (error.name === 'SequelizeUniqueConstraintError') {
        console.log('✅ Unique username constraint working');
      }
    }

    // Test 11: Test email validation
    console.log('\nTest 11: Testing email validation...');
    try {
      await User.create({
        username: 'invaliduser',
        email: 'not-an-email', // Invalid email
        password: 'password123'
      });
      console.log('❌ Email validation not working');
    } catch (error) {
      if (error.name === 'SequelizeValidationError') {
        console.log('✅ Email validation working');
      }
    }

    // Test 12: Test password update
    console.log('\nTest 12: Testing password update...');
    const oldPassword = testUser.password;
    testUser.password = 'newpassword456';
    await testUser.save();
    const passwordChanged = oldPassword !== testUser.password;
    console.log('✅ Password re-hashed on update:', passwordChanged);
    const newPasswordWorks = await testUser.comparePassword('newpassword456');
    console.log('✅ New password works:', newPasswordWorks);

    // Cleanup
    console.log('\n🧹 Cleaning up test data...');
    await testUser.destroy();
    console.log('✅ Test user deleted');

    console.log('\n' + '='.repeat(60));
    console.log('✅ ALL TESTS PASSED!');
    console.log('='.repeat(60));
    console.log('\nUser Model Summary:');
    console.log('- ✅ User creation with UUID');
    console.log('- ✅ Password hashing (bcrypt)');
    console.log('- ✅ Password comparison');
    console.log('- ✅ toJSON excludes password');
    console.log('- ✅ Find by email/username');
    console.log('- ✅ Streak calculation');
    console.log('- ✅ Accuracy/pass rate calculation');
    console.log('- ✅ Unique constraints');
    console.log('- ✅ Email validation');
    console.log('- ✅ Password update & re-hash');
    console.log('\n');

    process.exit(0);
  } catch (error) {
    console.error('\n❌ Test failed:', error.message);
    if (error.errors) {
      error.errors.forEach(err => {
        console.error('   -', err.message);
      });
    }
    console.error('\nStack:', error.stack);
    process.exit(1);
  }
}

testUserModel();