#!/usr/bin/env bun

/**
 * Configuration Helper Script
 *
 * This script shows the current unified configuration and provides
 * examples of environment variables that can be set to override defaults.
 *
 * Usage:
 *   bun show-config.js           # Show current config
 *   bun show-config.js --env     # Show as environment variables
 *   bun show-config.js --help    # Show help
 */

/* eslint-disable no-console */

import { unifiedConfig, exportAsEnvVars } from './config/unified.config';

const args = process.argv.slice(2);
const showEnv = args.includes('--env');
const showHelp = args.includes('--help');

if (showHelp) {
  console.log(`
Configuration Helper - Single Source of Truth

USAGE:
  bun show-config.js              Show current unified config
  bun show-config.js --env        Show as environment variables
  bun show-config.js --help       Show this help

DESCRIPTION:
  This app uses a unified configuration system as the single source of truth.
  All settings come from config/unified.config.ts with environment overrides.

COMMON ENVIRONMENT OVERRIDES:
  # Application
  NODE_ENV=production
  APP_NAME="My Custom App Name"
  APP_BASE_URL=https://myapp.com

  # Database (required for production)
  VITE_COUCHDB_URL=http://localhost:5984
  VITE_COUCHDB_USER=admin
  VITE_COUCHDB_PASSWORD=secure-password

  # Authentication (required for production)
  JWT_SECRET=your-secure-jwt-secret
  SESSION_SECRET=your-secure-session-secret

  # Email (optional)
  VITE_MAILGUN_API_KEY=key-abc123
  VITE_MAILGUN_DOMAIN=mg.example.com

  # OAuth (optional)
  VITE_GOOGLE_CLIENT_ID=your-google-client-id
  VITE_GITHUB_CLIENT_ID=your-github-client-id

HOW IT WORKS:
  1. Unified config provides smart defaults for all environments
  2. Environment variables override specific settings when needed
  3. No more scattered .env files or hardcoded values
  4. Type-safe configuration throughout the app

EXAMPLES:
  # Development with custom database
  VITE_COUCHDB_URL=http://dev-db:5984 bun run dev

  # Production build with custom settings
  NODE_ENV=production APP_NAME="Prod App" make docker-build

  # Check current config
  bun show-config.js
`);
  process.exit(0);
}

console.log('🔧 Unified Configuration - Single Source of Truth\n');

if (showEnv) {
  console.log('📋 Current Configuration as Environment Variables:\n');
  const envVars = exportAsEnvVars();

  // Group by category for better readability
  const categories = {
    Application: [
      'APP_NAME',
      'APP_VERSION',
      'APP_BASE_URL',
      'NODE_ENV',
      'PORT',
    ],
    Database: [
      'VITE_COUCHDB_URL',
      'VITE_COUCHDB_USER',
      'VITE_COUCHDB_PASSWORD',
      'COUCHDB_DATABASE_NAME',
    ],
    Authentication: ['JWT_SECRET', 'JWT_EXPIRES_IN', 'SESSION_SECRET'],
    Email: [
      'EMAIL_PROVIDER',
      'VITE_MAILGUN_API_KEY',
      'VITE_MAILGUN_DOMAIN',
      'MAILGUN_FROM_NAME',
      'MAILGUN_FROM_EMAIL',
    ],
    OAuth: [
      'VITE_GOOGLE_CLIENT_ID',
      'GOOGLE_CLIENT_SECRET',
      'VITE_GITHUB_CLIENT_ID',
      'GITHUB_CLIENT_SECRET',
    ],
    Features: ['ENABLE_EMAIL_VERIFICATION', 'ENABLE_OAUTH', 'DEBUG_MODE'],
    Logging: ['LOG_LEVEL', 'LOG_FORMAT'],
  };

  Object.entries(categories).forEach(([category, keys]) => {
    console.log(`${category}:`);
    keys.forEach(key => {
      if (envVars[key] !== undefined) {
        const value = envVars[key];
        // Mask sensitive values
        const maskedValue =
          key.includes('SECRET') ||
          key.includes('PASSWORD') ||
          key.includes('API_KEY')
            ? '***masked***'
            : value;
        console.log(`  ${key}=${maskedValue}`);
      }
    });
    console.log('');
  });
} else {
  console.log('📊 Current Unified Configuration:\n');

  // Show key configuration sections
  console.log('Application:');
  console.log(`  Name: ${unifiedConfig.app.name}`);
  console.log(`  Environment: ${unifiedConfig.app.environment}`);
  console.log(`  Base URL: ${unifiedConfig.app.baseUrl}`);
  console.log(`  Port: ${unifiedConfig.app.port}`);
  console.log('');

  console.log('Database:');
  console.log(`  URL: ${unifiedConfig.database.url}`);
  console.log(`  Username: ${unifiedConfig.database.username}`);
  console.log(
    `  Password: ${unifiedConfig.database.password ? '***set***' : '***not set***'}`
  );
  console.log(`  Mock Mode: ${unifiedConfig.database.useMock}`);
  console.log('');

  console.log('Authentication:');
  console.log(
    `  JWT Secret: ${unifiedConfig.auth.jwtSecret ? '***set***' : '***not set***'}`
  );
  console.log(`  JWT Expires: ${unifiedConfig.auth.jwtExpiresIn}`);
  console.log('');

  console.log('Features:');
  console.log(
    `  Email Verification: ${unifiedConfig.features.enableEmailVerification}`
  );
  console.log(`  OAuth: ${unifiedConfig.features.enableOAuth}`);
  console.log(`  Debug Mode: ${unifiedConfig.features.debugMode}`);
  console.log('');

  console.log('Email:');
  console.log(`  Provider: ${unifiedConfig.email.provider}`);
  console.log(
    `  From: ${unifiedConfig.email.fromName} <${unifiedConfig.email.fromEmail}>`
  );
  console.log('');

  console.log('Logging:');
  console.log(`  Level: ${unifiedConfig.logging.level}`);
  console.log(`  Format: ${unifiedConfig.logging.format}`);
  console.log('');
}

console.log('💡 Tips:');
console.log('  • Use --env to see current config as environment variables');
console.log('  • Use --help to see configuration documentation');
console.log('  • Set environment variables to override defaults');
console.log('  • All configuration comes from config/unified.config.ts');
console.log('');