#!/usr/bin/env node

// Environment setup script for Reason Flow
const fs = require('fs');
const path = require('path');
const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

const question = (query) => {
  return new Promise((resolve) => {
    rl.question(query, resolve);
  });
};

const main = async () => {
  console.log('🚀 Reason Flow Environment Setup');
  console.log('================================\n');

  try {
    // Check if .env already exists
    const envPath = path.join(__dirname, '.env');
    if (fs.existsSync(envPath)) {
      const overwrite = await question('⚠️  .env file already exists. Overwrite? (y/N): ');
      if (overwrite.toLowerCase() !== 'y' && overwrite.toLowerCase() !== 'yes') {
        console.log('Setup cancelled.');
        process.exit(0);
      }
    }

    console.log('Please provide the following configuration values:\n');

    // Collect configuration
    const config = {};

    // Server Configuration
    console.log('📡 Server Configuration:');
    config.PORT = await question('Port (default: 8000): ') || '8000';
    config.NODE_ENV = await question('Environment (development/production/test, default: development): ') || 'development';

    // Database Configuration
    console.log('\n🗄️  Database Configuration:');
    config.DB_HOST = await question('Database Host (default: localhost): ') || 'localhost';
    config.DB_PORT = await question('Database Port (default: 5432): ') || '5432';
    config.DB_NAME = await question('Database Name (default: reason_flow): ') || 'reason_flow';
    config.DB_USER = await question('Database User (default: postgres): ') || 'postgres';
    config.DB_PASSWORD = await question('Database Password: ');

    // API Keys
    console.log('\n🔑 API Keys:');
    config.GROQ_API_KEY = await question('Groq API Key (required): ');
    config.OPENAI_API_KEY = await question('OpenAI API Key (optional): ');
    config.SERP_API_KEY = await question('SERP API Key (optional): ');

    // JWT Configuration
    console.log('\n🔐 Security Configuration:');
    config.JWT_SECRET = await question('JWT Secret (or press Enter for auto-generated): ');
    if (!config.JWT_SECRET) {
      config.JWT_SECRET = require('crypto').randomBytes(64).toString('hex');
      console.log(`Auto-generated JWT Secret: ${config.JWT_SECRET}`);
    }

    // Admin User
    console.log('\n👤 Admin User Configuration:');
    config.ADMIN_EMAIL = await question('Admin Email (default: admin@reasonflow.com): ') || 'admin@reasonflow.com';
    config.ADMIN_PASSWORD = await question('Admin Password (default: admin123): ') || 'admin123';

    // Generate .env file
    const envContent = generateEnvContent(config);
    fs.writeFileSync(envPath, envContent);

    console.log('\n✅ Environment configuration created successfully!');
    console.log(`📁 Configuration saved to: ${envPath}`);
    
    console.log('\nNext steps:');
    console.log('1. Review your configuration: node server/utils/validateConfig.js show');
    console.log('2. Validate configuration: node server/utils/validateConfig.js validate');
    console.log('3. Setup database: npm run db:setup');
    console.log('4. Start the server: npm run dev');

  } catch (error) {
    console.error('\n❌ Setup failed:', error.message);
    process.exit(1);
  } finally {
    rl.close();
  }
};

const generateEnvContent = (config) => {
  return `# Reason Flow Environment Configuration
# Generated on ${new Date().toISOString()}

# Server Configuration
PORT=${config.PORT}
NODE_ENV=${config.NODE_ENV}
HOST=localhost

# Database Configuration
DB_HOST=${config.DB_HOST}
DB_PORT=${config.DB_PORT}
DB_NAME=${config.DB_NAME}
DB_USER=${config.DB_USER}
DB_PASSWORD=${config.DB_PASSWORD}
DB_SSL=false

# Groq API Configuration
GROQ_API_KEY=${config.GROQ_API_KEY}
GROQ_MODEL=moonshotai/kimi-k2-instruct-0905
GROQ_BASE_URL=https://api.groq.com

# OpenAI API Configuration
OPENAI_API_KEY=${config.OPENAI_API_KEY}
OPENAI_BASE_URL=https://api.openai.com/v1

# JWT Configuration
JWT_SECRET=${config.JWT_SECRET}
JWT_EXPIRES_IN=7d

# Admin User Configuration
ADMIN_EMAIL=${config.ADMIN_EMAIL}
ADMIN_PASSWORD=${config.ADMIN_PASSWORD}
ADMIN_FIRST_NAME=Admin
ADMIN_LAST_NAME=User

# File Upload Configuration
MAX_FILE_SIZE=50MB
UPLOAD_PATH=./uploads
ALLOWED_FILE_TYPES=pdf,txt,doc,docx

# Rate Limiting
RATE_LIMIT_WINDOW_MS=900000
RATE_LIMIT_MAX_REQUESTS=100

# Logging Configuration
LOG_LEVEL=info
LOG_FILE=./logs/app.log
LOG_MAX_SIZE=10MB
LOG_MAX_FILES=5

# CORS Configuration
CORS_ORIGIN=http://localhost:3000

# Security Configuration
HELMET_ENABLED=true
RATE_LIMIT_ENABLED=true

# Development Configuration
DEBUG_MODE=true
VERBOSE_LOGGING=true
HOT_RELOAD=true

# Monitoring Configuration
HEALTH_CHECK_ENABLED=true
METRICS_ENABLED=true
PERFORMANCE_MONITORING=true

# Model Configuration
MODEL1_TEMPERATURE=0.3
MODEL1_MAX_TOKENS=3000
QUERYMODEL_TEMPERATURE=0.5
QUERYMODEL_MAX_TOKENS=4000

# Fine-tuning Configuration
FINE_TUNING_ENABLED=true
FINE_TUNING_SCHEDULE=weekly
FINE_TUNING_BATCH_SIZE=10

# Feedback Configuration
FEEDBACK_PROCESSING_ENABLED=true
FEEDBACK_BATCH_SIZE=50
FEEDBACK_PROCESSING_SCHEDULE=daily
`;
};

main();