'use strict'
/**
 * platform-darwin.js — macOS-specific runtime adapter
 * Loaded exclusively when process.platform === 'darwin'
 */

const path = require('path')
const os = require('os')

const PLATFORM = 'darwin'

// ── Writable path candidates for app userData ─────────────────────────────────
function getWritableCandidates(appDirName) {
  const candidates = []
  candidates.push(path.join(os.homedir(), 'Library', 'Application Support', 'Chahuadev', appDirName))
  candidates.push(path.join(os.tmpdir(), appDirName))
  return candidates
}

// ── Command name normalization ────────────────────────────────────────────────
// macOS: no .cmd suffix — npm/npx/pnpm/yarn are native shell scripts.
function normalizeExecName(cmd) {
  return String(cmd || '').trim()
}

// ── Shell wrapping ────────────────────────────────────────────────────────────
// macOS commands run directly via node-pty — no cmd.exe-style wrapping needed.
function shouldUseShell(cmd) { // eslint-disable-line no-unused-vars
  return false
}

// Not called on macOS (shouldUseShell always false), but satisfies interface.
function buildShellSpawn(cmd, args) {
  return { file: cmd, args: args || [] }
}

// ── node-pty spawn extra options ──────────────────────────────────────────────
// useConpty is Windows-only. macOS uses standard POSIX PTY.
function getPtySpawnOptions() {
  return {}
}

// ── Node.js runtime path ──────────────────────────────────────────────────────
function resolveNodeRuntime() {
  return 'node'
}

// ── Linux/macOS build command ─────────────────────────────────────────────────
function _quoteBash(s) {
  return `'${String(s || '').replace(/'/g, `'"'"'`)}'`
}

function rewriteLinuxBuildCommand(cwd) {
  const script = [
    'set -euo pipefail',
    `cd ${_quoteBash(cwd)}`,
    'npm install',
    'if npm run | grep -q "build:linux"; then npm run build:linux; else npx electron-builder --linux AppImage --x64 --publish never; fi'
  ].join('; ')
  return {
    cmd: 'bash',
    args: ['-lc', script],
    rewriteInfo: {
      applied: true,
      kind: 'launcher-linux-build-inline-bash',
      targetProjectPath: cwd
    }
  }
}

// ── Protected OS path bases ───────────────────────────────────────────────────
// Base list covers standard macOS paths.
// We also scan /Volumes at runtime to protect externally mounted volumes
// (Time Machine disks, network shares, disk images, external drives, etc.)

function _readMacVolumes() {
  try {
    const fs = require('fs')
    // /Volumes contains all mounted filesystems; the boot volume is a symlink → '/'
    // Filter out symlinks to avoid double-protecting the root partition.
    return fs.readdirSync('/Volumes').reduce((acc, name) => {
      const full = `/Volumes/${name}`
      try {
        const stat = fs.lstatSync(full)
        if (!stat.isSymbolicLink()) acc.push(full)
      } catch { /* ignore vanished entries */ }
      return acc
    }, [])
  } catch {
    return []
  }
}

function getProtectedPathBases() {
  const homeDir = os.homedir()
  return [
    '/System', '/Library', '/Applications',
    '/private', '/usr', '/bin', '/sbin',
    '/var', '/etc', '/opt',
    path.join(homeDir, 'Library'),
    ..._readMacVolumes()
  ]
}

module.exports = {
  PLATFORM,
  getWritableCandidates,
  normalizeExecName,
  shouldUseShell,
  buildShellSpawn,
  getPtySpawnOptions,
  resolveNodeRuntime,
  rewriteLinuxBuildCommand,
  getProtectedPathBases
}