const mongoose = require('mongoose');
const bcrypt = require('bcryptjs');
const User = require('./models/User');
const SourceText = require('./models/SourceText');

// MongoDB connection
const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/transcreation-sandbox';

async function seedDatabase() {
  try {
    console.log('🌱 Starting database seeding...');
    console.log('Connecting to MongoDB...');
    await mongoose.connect(MONGODB_URI);
    console.log('✅ Connected to MongoDB');

    // Create admin user
    console.log('👤 Creating admin user...');
    const adminPassword = await bcrypt.hash('admin123', 10);
    const adminUser = await User.findOneAndUpdate(
      { email: 'admin@example.com' },
      {
        email: 'admin@example.com',
        password: adminPassword,
        username: 'admin',
        role: 'admin',
        isActive: true
      },
      { upsert: true, new: true }
    );
    console.log('✅ Admin user created:', adminUser.email);

    // Create student user
    console.log('👤 Creating student user...');
    const studentPassword = await bcrypt.hash('student123', 10);
    const studentUser = await User.findOneAndUpdate(
      { email: 'student@example.com' },
      {
        email: 'student@example.com',
        password: studentPassword,
        username: 'student',
        role: 'student',
        isActive: true
      },
      { upsert: true, new: true }
    );
    console.log('✅ Student user created:', studentUser.email);

    // Clear existing source texts
    console.log('🗑️ Clearing existing source texts...');
    await SourceText.deleteMany({});
    console.log('✅ Cleared existing source texts');

    // Create tutorial tasks for Week 1
    console.log('📚 Creating tutorial tasks for Week 1...');
    const tutorialTasks = [
      {
        title: 'Tutorial Task 1',
        content: 'The early bird catches the worm.',
        category: 'tutorial',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'beginner',
        translationBrief: 'Translate this proverb into Chinese, maintaining its cultural meaning.'
      },
      {
        title: 'Tutorial Task 2',
        content: 'Actions speak louder than words.',
        category: 'tutorial',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'beginner',
        translationBrief: 'Translate this saying into Chinese, preserving its idiomatic nature.'
      },
      {
        title: 'Tutorial Task 3',
        content: 'A picture is worth a thousand words.',
        category: 'tutorial',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'beginner',
        translationBrief: 'Translate this expression into Chinese, keeping its metaphorical meaning.'
      }
    ];

    for (const task of tutorialTasks) {
      await SourceText.create(task);
    }
    console.log('✅ Created', tutorialTasks.length, 'tutorial tasks');

    // Create tutorial tasks for Week 2 (with images)
    console.log('📚 Creating tutorial tasks for Week 2...');
    const tutorialTasksWeek2 = [
      {
        title: 'Tutorial Task 1 - Week 2',
        content: 'A picture is worth a thousand words.',
        category: 'tutorial',
        weekNumber: 2,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this saying into Chinese, considering the visual context of the image.',
        imageUrl: 'https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=800&h=600&fit=crop',
        imageAlt: 'A beautiful landscape photograph showing mountains and lake'
      },
      {
        title: 'Tutorial Task 2 - Week 2',
        content: 'The early bird catches the worm.',
        category: 'tutorial',
        weekNumber: 2,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this proverb into Chinese, considering the visual elements in the image.',
        imageUrl: 'https://images.unsplash.com/photo-1444464666168-49d633b86797?w=800&h=600&fit=crop',
        imageAlt: 'A bird perched on a branch during sunrise'
      },
      {
        title: 'Tutorial Task 3 - Week 2',
        content: 'Actions speak louder than words.',
        category: 'tutorial',
        weekNumber: 2,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this saying into Chinese, considering the visual context provided.',
        imageUrl: 'https://images.unsplash.com/photo-1557804506-669a67965ba0?w=800&h=600&fit=crop',
        imageAlt: 'People working together in a collaborative environment'
      }
    ];

    for (const task of tutorialTasksWeek2) {
      await SourceText.create(task);
    }
    console.log('✅ Created', tutorialTasksWeek2.length, 'tutorial tasks for Week 2');

    // Create weekly practice tasks for Week 1
    console.log('📝 Creating weekly practice tasks for Week 1...');
    const weeklyPracticeTasks = [
      {
        title: 'Week 1 Practice 1',
        content: '为什么睡前一定要吃夜宵？因为这样才不会做饿梦。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate',
        translationBrief: 'Translate this humorous Chinese text into English, maintaining its wordplay and cultural humor.'
      },
      {
        title: 'Week 1 Practice 2',
        content: '女娲用什么补天？强扭的瓜。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate',
        translationBrief: 'Translate this Chinese riddle into English, preserving its clever wordplay.'
      },
      {
        title: 'Week 1 Practice 3',
        content: '你知道如何区分真假大象吗？把他们仍进水中，真相会浮出水面的。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate',
        translationBrief: 'Translate this Chinese joke into English, maintaining its pun and humor.'
      },
      {
        title: 'Week 1 Practice 4',
        content: 'What if Soy milk is just regular milk introducing itself in Spanish.',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this English joke into Chinese, preserving its linguistic humor.'
      },
      {
        title: 'Week 1 Practice 5',
        content: 'I can\'t believe I got fired from the calendar factory. All I did was take a day off.',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this English joke into Chinese, maintaining its wordplay humor.'
      },
      {
        title: 'Week 1 Practice 6',
        content: 'When life gives you melons, you might be dyslexic.',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate',
        translationBrief: 'Translate this English wordplay into Chinese, preserving its linguistic cleverness.'
      }
    ];

    for (const task of weeklyPracticeTasks) {
      await SourceText.create(task);
    }
    console.log('✅ Created', weeklyPracticeTasks.length, 'weekly practice tasks');

    // Create practice examples (legacy support)
    console.log('📖 Creating practice examples...');
    const practiceExamples = [
      {
        title: 'Practice Example 1',
        content: '为什么睡前一定要吃夜宵？因为这样才不会做饿梦。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate'
      },
      {
        title: 'Practice Example 2',
        content: '女娲用什么补天？强扭的瓜。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate'
      },
      {
        title: 'Practice Example 3',
        content: '你知道如何区分真假大象吗？把他们仍进水中，真相会浮出水面的。',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'Chinese',
        sourceCulture: 'Chinese',
        difficulty: 'intermediate'
      },
      {
        title: 'Practice Example 4',
        content: 'What if Soy milk is just regular milk introducing itself in Spanish.',
        category: 'weekly-practice',
        weekNumber: 1,
        sourceLanguage: 'English',
        sourceCulture: 'Western',
        difficulty: 'intermediate'
      }
    ];

    for (const example of practiceExamples) {
      await SourceText.create(example);
    }
    console.log('✅ Created', practiceExamples.length, 'practice examples');

    console.log('🎉 Database seeding completed successfully!');
    console.log('');
    console.log('📋 Created:');
    console.log('  👤 Admin user: admin@example.com / admin123');
    console.log('  👤 Student user: student@example.com / student123');
    console.log('  📚 Tutorial tasks: 3 tasks for Week 1');
    console.log('  📝 Weekly practice: 6 tasks for Week 1');
    console.log('  📖 Practice examples: 4 examples');
    console.log('');
    console.log('🔗 You can now:');
    console.log('  1. Log in with admin@example.com / admin123');
    console.log('  2. Log in with student@example.com / student123');
    console.log('  3. View tutorial tasks and weekly practice');
    console.log('  4. Create submissions and test the voting system');

  } catch (error) {
    console.error('❌ Database seeding failed:', error);
    process.exit(1);
  } finally {
    await mongoose.disconnect();
    console.log('🔌 Disconnected from MongoDB');
  }
}

// Run the seeding
seedDatabase();