#!/usr/bin/env node

const fs = require('fs')
const path = require('path')

const envPath = path.resolve(__dirname, '../.env')
const sampleEnvPath = path.resolve(__dirname, '../.sample.env')

// Check if .env already exists
if (fs.existsSync(envPath)) {
  console.log('.env file already exists. To rebuild, delete it first.')
  process.exit(0)
}

// Copy sample env
const sampleContent = fs.readFileSync(sampleEnvPath, 'utf8')

// Development defaults
const devDefaults = {
  NODE_ENV: 'development',
  
  // Database
  POSTGRES_USER: 'lamassu',
  POSTGRES_PASSWORD: 'lamassu',
  POSTGRES_HOST: 'localhost',
  POSTGRES_PORT: '5432',
  POSTGRES_DB: 'lamassu',
  
  // Paths
  CA_PATH: path.resolve(__dirname, '../Lamassu_CA.pem'),
  CERT_PATH: path.resolve(__dirname, '../../../certs/Lamassu_LS.pem'),
  KEY_PATH: path.resolve(__dirname, '../../../certs/Lamassu_LS.key'),
  MNEMONIC_PATH: path.resolve(__dirname, '../../../mnemonic.txt'),
  
  // Directories
  BLOCKCHAIN_DIR: path.resolve(__dirname, '../../../blockchain'),
  OFAC_DATA_DIR: path.resolve(__dirname, '../../../ofac'),
  ID_PHOTO_CARD_DIR: path.resolve(__dirname, '../../../photos/idcard'),
  FRONT_CAMERA_DIR: path.resolve(__dirname, '../../../photos/front'),
  OPERATOR_DATA_DIR: path.resolve(__dirname, '../../../operator-data'),
  
  // Misc
  HOSTNAME: 'localhost',
  LOG_LEVEL: 'debug',
  
  // Bitcoin (for development, use remote node to avoid full sync)
  BTC_NODE_LOCATION: 'remote',
  BTC_WALLET_LOCATION: 'local',
  BTC_NODE_HOST: 'blockstream.info',
  BTC_NODE_PORT: '8333',
  
  // LNBits development defaults
  LNBITS_ENDPOINT: 'https://legend.lnbits.com',
  LNBITS_ADMIN_KEY: ''  // User needs to set this
}

// Build .env content
let envContent = sampleContent

// Replace empty values with dev defaults
Object.keys(devDefaults).forEach(key => {
  const regex = new RegExp(`^${key}=.*$`, 'gm')
  envContent = envContent.replace(regex, `${key}=${devDefaults[key]}`)
})

// Write .env file
fs.writeFileSync(envPath, envContent)

console.log('Development .env file created with defaults.')
console.log('IMPORTANT: You still need to:')
console.log('  1. Generate certificates using: bash tools/cert-gen.sh')
console.log('  2. Create a mnemonic file at: ../../../mnemonic.txt')
console.log('  3. Set up PostgreSQL database')
console.log('  4. Configure LNBits admin key if using Lightning')
console.log('')
console.log('Run migrations with: node bin/lamassu-migrate')