const mongoose = require('mongoose');
const bcrypt = require('bcryptjs');
require('dotenv').config();

// Import models
const User = require('../src/models/User');
const Conversation = require('../src/models/Conversation');
const Message = require('../src/models/Message');

const initDB = async () => {
  try {
    // Connect to database
    await mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/ysnrfd-messenger');
    console.log('✅ Connected to database for initialization');

    // Clear existing data (optional - for development)
    if (process.argv.includes('--clean')) {
      await User.deleteMany({});
      await Conversation.deleteMany({});
      await Message.deleteMany({});
      console.log('🗑️  Cleared existing data');
    }

    // Create sample users
    const sampleUsers = [
      {
        username: 'alice',
        email: 'alice@example.com',
        password: 'password123',
        displayName: 'Alice Johnson',
        bio: 'Hello! I love coding and chatting.',
        status: 'online'
      },
      {
        username: 'bob',
        email: 'bob@example.com',
        password: 'password123',
        displayName: 'Bob Smith',
        bio: 'Developer and tech enthusiast',
        status: 'online'
      },
      {
        username: 'charlie',
        email: 'charlie@example.com',
        password: 'password123',
        displayName: 'Charlie Brown',
        bio: 'Just here to chat with friends',
        status: 'away'
      }
    ];

    const createdUsers = await User.insertMany(sampleUsers);
    console.log(`👤 Created ${createdUsers.length} sample users`);

    // Create a sample conversation
    const sampleConversation = await Conversation.create({
      type: 'group',
      name: 'General Chat',
      description: 'A place for general discussion',
      createdBy: createdUsers[0]._id,
      participants: [
        { user: createdUsers[0]._id, role: 'owner' },
        { user: createdUsers[1]._id, role: 'member' },
        { user: createdUsers[2]._id, role: 'member' }
      ]
    });

    console.log('💬 Created sample conversation');

    // Create sample messages
    const sampleMessages = [
      {
        conversation: sampleConversation._id,
        sender: createdUsers[0]._id,
        content: 'Hello everyone! Welcome to the chat! 👋',
        type: 'text'
      },
      {
        conversation: sampleConversation._id,
        sender: createdUsers[1]._id,
        content: 'Thanks for setting this up, Alice! 😊',
        type: 'text'
      },
      {
        conversation: sampleConversation._id,
        sender: createdUsers[2]._id,
        content: 'Hey guys! Looking forward to chatting with you all!',
        type: 'text'
      }
    ];

    await Message.insertMany(sampleMessages);
    console.log(`💌 Created ${sampleMessages.length} sample messages`);

    console.log('\n🎉 Database initialization completed successfully!');
    console.log('\n📋 Sample login credentials:');
    console.log('Alice: alice@example.com / password123');
    console.log('Bob: bob@example.com / password123');
    console.log('Charlie: charlie@example.com / password123');

  } catch (error) {
    console.error('❌ Initialization error:', error);
    process.exit(1);
  } finally {
    await mongoose.connection.close();
    console.log('\n🔌 Database connection closed');
  }
};

// Run initialization
initDB();