import { access, readFile } from 'node:fs/promises'
import os from 'node:os'
import path from 'node:path'
import process from 'node:process'

export const loadReleaseEnvironment = async (root) => {
  const filePath = path.join(root, '.env')
  const content = await readFile(filePath, 'utf8').catch((error) => {
    if (error?.code === 'ENOENT') return ''
    throw error
  })
  for (const rawLine of content.split(/\r?\n/u)) {
    const line = rawLine.trim()
    if (!line || line.startsWith('#')) continue
    const separator = line.indexOf('=')
    if (separator < 1) throw new Error(`invalid release environment line: ${rawLine}`)
    const name = line.slice(0, separator).trim()
    let value = line.slice(separator + 1).trim()
    if (
      (value.startsWith('"') && value.endsWith('"')) ||
      (value.startsWith("'") && value.endsWith("'"))
    ) {
      value = value.slice(1, -1)
    }
    if (!process.env[name]) process.env[name] = value
  }

  if (process.platform === 'win32' && !process.env.NCURATOR_AWS_CLI) {
    const candidates = [
      process.env.ProgramFiles
        ? path.join(process.env.ProgramFiles, 'Amazon', 'AWSCLIV2', 'aws.exe')
        : '',
      path.join(os.homedir(), '.ncurator', 'release-tools', 'awscli', 'aws.exe')
    ].filter(Boolean)
    for (const candidate of candidates) {
      const exists = await access(candidate)
        .then(() => true)
        .catch(() => false)
      if (exists) {
        process.env.NCURATOR_AWS_CLI = candidate
        break
      }
    }
  }
}