import { existsSync, readFileSync, writeFileSync } from 'node:fs'

const keys = ['VITE_API_BASE_URL', 'VITE_USE_MOCK_AUTH', 'VITE_BASE_PATH']

function parseEnv(text) {
  const out = {}
  for (const line of text.split(/\r?\n/)) {
    const trimmed = line.trim()
    if (!trimmed || trimmed.startsWith('#')) continue
    const index = trimmed.indexOf('=')
    if (index <= 0) continue
    const key = trimmed.slice(0, index).trim()
    let value = trimmed.slice(index + 1)
    if (
      (value.startsWith('"') && value.endsWith('"')) ||
      (value.startsWith("'") && value.endsWith("'"))
    ) {
      value = value.slice(1, -1)
    }
    out[key] = value
  }
  return out
}

const merged = {}

if (existsSync('.env')) {
  Object.assign(merged, parseEnv(readFileSync('.env', 'utf8')))
}

for (const key of keys) {
  const value = process.env[key]
  if (value) merged[key] = value
}

if (!merged.VITE_API_BASE_URL) {
  merged.VITE_API_BASE_URL = 'https://nademitex.montest.ir/server/api'
}

if (!merged.VITE_USE_MOCK_AUTH) {
  merged.VITE_USE_MOCK_AUTH = 'false'
}

if (!merged.VITE_BASE_PATH || merged.VITE_BASE_PATH === '/') {
  merged.VITE_BASE_PATH = '/'
} else if (!merged.VITE_BASE_PATH.endsWith('/')) {
  merged.VITE_BASE_PATH = `${merged.VITE_BASE_PATH}/`
}

const lines = Object.entries(merged)
  .filter(([key]) => key.startsWith('VITE_'))
  .map(([key, value]) => `${key}=${value}`)

writeFileSync('.env.production', `${lines.join('\n')}\n`)
console.log('Vite build env:')
for (const line of lines) console.log(`  ${line}`)