'use strict'

const { app, BrowserWindow, ipcMain, shell, dialog, safeStorage, session, Menu, Tray, screen } = require('electron')
const path = require('path')
const fs = require('fs')
const os = require('os')
const { spawn, spawnSync } = require('child_process')
const platform = require('./runtime/platform')
let ptyModule = null

function getPtyModule() {
  if (ptyModule) return ptyModule
  ptyModule = require('node-pty')
  return ptyModule
}

function isWritableDirectory(dirPath) {
  try {
    fs.mkdirSync(dirPath, { recursive: true })
    fs.accessSync(dirPath, fs.constants.W_OK)
    const probe = path.join(dirPath, `.write-test-${process.pid}-${Date.now()}.tmp`)
    fs.writeFileSync(probe, 'ok')
    fs.unlinkSync(probe)
    return true
  } catch {
    return false
  }
}

function configureRuntimeWritablePaths() {
  const candidates = platform.getWritableCandidates('Dev-Launcher')

  for (const basePath of candidates) {
    if (!isWritableDirectory(basePath)) continue
    const sessionPath = path.join(basePath, 'session-data')
    const cachePath = path.join(sessionPath, 'Cache')
    const gpuCachePath = path.join(sessionPath, 'GPUCache')

    if (!isWritableDirectory(sessionPath)) continue
    isWritableDirectory(cachePath)
    isWritableDirectory(gpuCachePath)

    try {
      app.setPath('userData', basePath)
      app.setPath('sessionData', sessionPath)
      app.commandLine.appendSwitch('disk-cache-dir', cachePath)
      return true
    } catch {
      // Try next candidate path
    }
  }

  return false
}

configureRuntimeWritablePaths()

let win = null
let splashWin = null
let tray = null
let currentProc = null
let currentProcKind = null
let currentMainCommandKey = null
const popupRuns = new Map()
let popupRunSeq = 0
let metricsTimer = null
let cpuSnapshot = null
let popupClampGuard = false
let popupDockSeq = 0

function popupChannel(runId, topic) {
  return `popup:${String(runId || '')}:${String(topic || '')}`
}

function popupLegacyChannel(topic) {
  const t = String(topic || '').trim().toLowerCase()
  if (t === 'meta') return 'popup-meta'
  if (t === 'out') return 'popup-out'
  if (t === 'done') return 'popup-done'
  if (t === 'metrics') return 'popup-metrics'
  return ''
}

function sendToPopup(ctx, topic, payload) {
  if (!ctx || !ctx.win || ctx.win.isDestroyed()) return
  const scopedChannel = popupChannel(ctx.runId, topic)
  ctx.win.webContents.send(scopedChannel, payload)

  // Backward compatibility for popup windows using the legacy preload bridge.
  const legacyChannel = popupLegacyChannel(topic)
  if (legacyChannel) {
    ctx.win.webContents.send(legacyChannel, payload)
  }
}
const secureConfigPath = path.join(app.getPath('userData'), 'secure-r2-config.json')
const auditLogPath = path.join(app.getPath('userData'), 'audit.log')
const isDev = !app.isPackaged
let requestGuardInstalled = false
const EXTERNAL_HOST_ALLOWLIST = new Set([
  'dash.cloudflare.com',
  'www.buymeacoffee.com',
  'buymeacoffee.com',
  'huggingface.co',
  'www.chahuadev.com',
  'chahuadev.com'
])

function isPathUnder(candidate, baseDir) {
  const base = path.resolve(String(baseDir || ''))
  const target = path.resolve(String(candidate || ''))
  if (!base || !target) return false
  if (process.platform === 'win32') {
    const b = base.toLowerCase()
    const t = target.toLowerCase()
    return t === b || t.startsWith(`${b}\\`)
  }
  return target === base || target.startsWith(`${base}/`)
}

function getRestrictedPathReason(targetPath) {
  const resolved = path.resolve(String(targetPath || ''))
  for (const base of platform.getProtectedPathBases()) {
    if (isPathUnder(resolved, base)) {
      return `Selection is blocked because the folder is inside a protected OS location: ${base}`
    }
  }
  return null
}

function notifyProtectedPathBlocked(selectedPath, reason) {
  const message = [
    'SECURITY POLICY NOTICE',
    '',
    'The selected folder is part of operating system directories.',
    'Access is blocked to protect system integrity and user data.',
    '',
    'Please select a project folder outside protected OS locations.'
  ].join('\n')

  writeAudit('blocked_project_root', { selectedPath, reason })
  sendToRenderer('project-selection-blocked', {
    selectedPath,
    reason,
    message
  })
}

// Project root: where the exe is placed (production) or this folder (dev)
// PORTABLE_EXECUTABLE_DIR = ตำแหน่งที่ user วาง .exe ไว้ (ไม่ใช่ Temp)
let projectRoot = app.isPackaged
  ? (process.env.PORTABLE_EXECUTABLE_DIR || path.dirname(process.execPath))
  : __dirname
let selectedExternalProjectRoot = null
let selectedExternalProjectMode = null

function getEffectiveProjectRoot() {
  return selectedExternalProjectRoot || projectRoot
}

function isExternalDevOnlyModeForRoot(root) {
  if (!selectedExternalProjectRoot) return false
  if (selectedExternalProjectMode !== 'npm-run-dev-only') return false
  return path.resolve(String(root || '')) === path.resolve(selectedExternalProjectRoot)
}

function buildDevOnlyGroups(root) {
  return [
    {
      label: 'Dev Mode', icon: 'npm', color: '#e84040',
      cmds: [
        { label: prettyCmdLabel('npm', ['run', 'dev']), cmd: 'npm', args: ['run', 'dev'], cwd: root }
      ]
    }
  ]
}

function buildCommandGroupsForProject(pkg, root, hasAndroid) {
  if (isExternalDevOnlyModeForRoot(root)) {
    return buildDevOnlyGroups(root)
  }
  return buildGroups(pkg, root, hasAndroid)
}

function createSplashWindow() {
  splashWin = new BrowserWindow({
    width: 520,
    height: 320,
    frame: false,
    resizable: false,
    alwaysOnTop: true,
    skipTaskbar: true,
    center: true,
    backgroundColor: '#09080f',
    webPreferences: { nodeIntegration: false, contextIsolation: true }
  })
  splashWin.loadFile(path.join(__dirname, 'splash.html'))
  splashWin.webContents.on('will-navigate', (e) => e.preventDefault())
}

function createWindow() {
  win = new BrowserWindow({
    width: 960,
    height: 660,
    minWidth: 740,
    minHeight: 520,
    backgroundColor: '#0d0d1a',
    icon: path.join(__dirname, 'icons', 'icon.png'),
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: false,
      // Packaged builds must not expose DevTools entry points.
      devTools: !!isDev
    },
    title: 'Dev Launcher',
    show: false
  })

  win.loadFile(path.join(__dirname, 'index.html'))
  installAppMenu()

  // Always deny renderer popups/navigation handoff.
  win.webContents.setWindowOpenHandler(() => ({ action: 'deny' }))
  win.webContents.on('will-navigate', (e, url) => {
    const allowed = String(url || '').startsWith('file:')
    if (!allowed) {
      e.preventDefault()
      writeAudit('blocked_navigation', { url: String(url || '') })
      if (!isDev) {
        dialog.showErrorBox('Security Blocked', 'Unauthorized external navigation attempt detected. The app will close.')
        app.quit()
      }
    }
  })

  if (!isDev) {
    // Block common DevTools shortcuts in production builds.
    const _blockDevToolsKeys = (event, input) => {
      const key = String(input.key || '').toLowerCase()
      const openDevTools =
        key === 'f12' ||
        ((input.control || input.meta) && input.shift && (key === 'i' || key === 'j' || key === 'c'))
      if (openDevTools) event.preventDefault()
    }
    win.webContents.on('before-input-event', _blockDevToolsKeys)
    win.once('closed', () => win.webContents.removeListener('before-input-event', _blockDevToolsKeys))
  }

  win.once('ready-to-show', () => {
    // Show main window and close splash after a short delay
    setTimeout(() => {
      if (splashWin && !splashWin.isDestroyed()) {
        splashWin.close()
        splashWin = null
      }
      win.show()
    }, isDev ? 150 : 500)
  })

  // Minimize to system tray instead of closing
  win.on('close', (e) => {
    if (tray && !win.isDestroyed()) {
      e.preventDefault()
      win.hide()
    }
  })

  const _onWinMove = () => layoutDockedPopups()
  win.on('move', _onWinMove)
  win.once('closed', () => win.removeListener('move', _onWinMove))

  win.on('resize', () => {
    layoutDockedPopups()
  })
}

function createTray() {
  tray = new Tray(path.join(__dirname, 'icons', 'icon.png'))
  tray.setToolTip('Dev Launcher')

  const ctxMenu = Menu.buildFromTemplate([
    {
      label: 'Show Dev Launcher',
      click: () => {
        if (win && !win.isDestroyed()) {
          win.show()
          win.focus()
        }
      }
    },
    { type: 'separator' },
    {
      label: 'Quit',
      click: () => {
        tray.removeListener('double-click', _onTrayDblClick)
        tray.destroy()
        tray = null
        killAllRunningJobs()
        app.quit()
      }
    }
  ])
  tray.setContextMenu(ctxMenu)

  const _onTrayDblClick = () => {
    if (win && !win.isDestroyed()) { win.show(); win.focus() }
  }
  tray.on('double-click', _onTrayDblClick)
}

async function chooseExternalProjectFolder(mode = 'full-project') {
  const targetWin = win && !win.isDestroyed() ? win : null
  const res = await dialog.showOpenDialog(targetWin, {
    title: mode === 'npm-run-dev-only'
      ? 'Select Project Folder (npm run dev only)'
      : 'Select Project Folder',
    properties: ['openDirectory']
  })

  if (res.canceled || !res.filePaths || !res.filePaths[0]) return { ok: false, cancelled: true }

  const picked = path.resolve(res.filePaths[0])
  const blockedReason = getRestrictedPathReason(picked)
  if (blockedReason) {
    notifyProtectedPathBlocked(picked, blockedReason)
    return { ok: false, blocked: true, error: blockedReason }
  }

  const pkgPath = path.join(picked, 'package.json')
  if (!fs.existsSync(pkgPath)) {
    dialog.showErrorBox('Invalid Project', `No package.json found in:\n${picked}`)
    return { ok: false, error: `No package.json found in ${picked}` }
  }

  selectedExternalProjectRoot = picked
  selectedExternalProjectMode = mode === 'npm-run-dev-only' ? 'npm-run-dev-only' : 'full-project'
  writeAudit('set_external_project_root', { root: picked, mode: selectedExternalProjectMode })
  sendToRenderer('project-root-changed', {
    root: getEffectiveProjectRoot(),
    external: true,
    mode: selectedExternalProjectMode
  })
  return { ok: true, root: picked, mode: selectedExternalProjectMode }
}

function useLauncherProjectRoot() {
  selectedExternalProjectRoot = null
  selectedExternalProjectMode = null
  writeAudit('reset_project_root', { root: projectRoot })
  sendToRenderer('project-root-changed', {
    root: getEffectiveProjectRoot(),
    external: false,
    mode: 'default'
  })
  return { ok: true, root: getEffectiveProjectRoot(), mode: 'default' }
}

function installAppMenu() {
  if (!isDev) {
    // Production builds: no application menu, no Dev/R2 access via menubar
    Menu.setApplicationMenu(null)
    if (win && !win.isDestroyed()) win.setMenu(null)
    return
  }

  const template = [
    {
      label: 'Dev',
      submenu: [
        {
          label: 'Select External Project Folder...',
          accelerator: 'Ctrl+Shift+O',
          click: () => { chooseExternalProjectFolder('full-project').catch(() => {}) }
        },
        {
          label: 'Select External Project Folder (npm run dev only)...',
          accelerator: 'Ctrl+Shift+D',
          click: () => { chooseExternalProjectFolder('npm-run-dev-only').catch(() => {}) }
        },
        {
          label: 'Use Launcher Project',
          accelerator: 'Ctrl+Shift+R',
          click: () => useLauncherProjectRoot()
        },
        { type: 'separator' },
        {
          label: 'Reload',
          accelerator: 'Ctrl+R',
          click: () => { if (win && !win.isDestroyed()) win.reload() }
        }
      ]
    }
  ]
  const menu = Menu.buildFromTemplate(template)
  Menu.setApplicationMenu(menu)
  if (win && !win.isDestroyed()) win.setMenu(menu)
}

function installRequestGuard() {
  if (requestGuardInstalled) return
  requestGuardInstalled = true

  const ses = session.defaultSession
  if (!ses) return

  // Deny all permission prompts by default (camera/mic/notifications/etc.).
  ses.setPermissionRequestHandler((_, __, callback) => callback(false))

  if (isDev) return

  ses.webRequest.onBeforeRequest((details, callback) => {
    const url = String(details.url || '')
    const allowed =
      url.startsWith('file:') ||
      url.startsWith('data:') ||
      url.startsWith('about:blank')

    if (allowed) {
      callback({ cancel: false })
      return
    }

    callback({ cancel: true })
    writeAudit('blocked_request', { url })

    // External request from renderer context is considered a policy violation.
    dialog.showErrorBox('Security Blocked', `Unauthorized external request detected:\n${url}\n\nThe app will close.`)
    app.quit()
  })
}

app.whenReady().then(() => {
  createSplashWindow()
  installRequestGuard()
  createWindow()
  setTimeout(() => {
    if (!tray) createTray()
  }, 300)
}).catch(err => {
  console.error('[app] startup error:', err)
  app.quit()
})

app.on('window-all-closed', () => {
  // ถ้ายังมี tray อยู่ ให้แอปทำงานต่อใน background
  if (!tray) {
    killAllRunningJobs()
    app.quit()
  }
})

app.on('before-quit', () => {
  killAllRunningJobs()
})

function killCurrentProc() {
  if (!currentProc) return
  try {
    if (currentProcKind === 'pty' && typeof currentProc.kill === 'function') {
      currentProc.kill()
    }
    // Kill process tree on Windows
    if (currentProc && currentProc.pid) {
      spawn('taskkill', ['/pid', String(currentProc.pid), '/f', '/t'], { shell: false, windowsHide: true })
    }
  } catch (_e) { /* best-effort kill; ignore errors to avoid crash-on-cleanup */ }
  currentProc = null
  currentProcKind = null
  currentMainCommandKey = null
}

function killProcessObject(proc, kind) {
  if (!proc) return
  try {
    if (kind === 'pty' && typeof proc.kill === 'function') {
      proc.kill()
    }
    if (proc && proc.pid) {
      spawn('taskkill', ['/pid', String(proc.pid), '/f', '/t'], { shell: false, windowsHide: true })
    }
  } catch (_e) { /* best-effort kill; ignore errors to avoid crash-on-cleanup */ }
}

function getCommandDisplayLine(cmd, args) {
  const normalizedArgs = (args || []).map(x => String(x || ''))
  return [String(cmd || ''), ...normalizedArgs].join(' ').trim()
}

function sanitizePopupTitle(raw) {
  return String(raw || 'Terminal').replace(/[<>:"/\\|?*]+/g, ' ').replace(/\s+/g, ' ').trim() || 'Terminal'
}

function buildPopupRunId() {
  popupRunSeq += 1
  return `popup-${Date.now()}-${popupRunSeq}`
}

function getCpuSnapshot() {
  const cpus = os.cpus() || []
  return cpus.map((cpu) => {
    const times = cpu && cpu.times ? cpu.times : {}
    return {
      user: Number(times.user || 0),
      nice: Number(times.nice || 0),
      sys: Number(times.sys || 0),
      idle: Number(times.idle || 0),
      irq: Number(times.irq || 0)
    }
  })
}

function computeCpuUsagePercent(prev, next) {
  if (!Array.isArray(prev) || !Array.isArray(next) || prev.length === 0 || next.length === 0) return null
  const count = Math.min(prev.length, next.length)
  let idleDelta = 0
  let totalDelta = 0
  for (let i = 0; i < count; i++) {
    const p = prev[i]
    const n = next[i]
    const pIdle = Number(p.idle || 0)
    const nIdle = Number(n.idle || 0)
    const pTotal = Number(p.user || 0) + Number(p.nice || 0) + Number(p.sys || 0) + pIdle + Number(p.irq || 0)
    const nTotal = Number(n.user || 0) + Number(n.nice || 0) + Number(n.sys || 0) + nIdle + Number(n.irq || 0)
    idleDelta += Math.max(0, nIdle - pIdle)
    totalDelta += Math.max(0, nTotal - pTotal)
  }
  if (totalDelta <= 0) return null
  const usage = Math.max(0, Math.min(100, ((totalDelta - idleDelta) / totalDelta) * 100))
  return Math.round(usage * 10) / 10
}

function collectSystemUsage() {
  const nextSnapshot = getCpuSnapshot()
  const cpuPercent = cpuSnapshot ? computeCpuUsagePercent(cpuSnapshot, nextSnapshot) : null
  cpuSnapshot = nextSnapshot

  const totalMem = Number(os.totalmem() || 0)
  const freeMem = Number(os.freemem() || 0)
  const usedMem = Math.max(0, totalMem - freeMem)
  const memPercent = totalMem > 0 ? Math.round(((usedMem / totalMem) * 100) * 10) / 10 : 0

  return {
    cpuPercent,
    memPercent,
    usedMem,
    totalMem
  }
}

function maybeStopMetricsTicker() {
  if (popupRuns.size > 0) return
  if (metricsTimer) {
    clearInterval(metricsTimer)
    metricsTimer = null
  }
  cpuSnapshot = null
}

function ensureMetricsTicker() {
  if (metricsTimer) return
  cpuSnapshot = getCpuSnapshot()
  metricsTimer = setInterval(() => {
    const usage = collectSystemUsage()
    for (const ctx of popupRuns.values()) {
      if (!ctx || !ctx.win || ctx.win.isDestroyed()) continue
      sendToPopup(ctx, 'metrics', usage)
    }
  }, 1200)
}

function getClampedBounds(targetWin, proposedBounds) {
  const display = screen.getDisplayMatching(proposedBounds)
  const area = display && display.workArea ? display.workArea : { x: 0, y: 0, width: 1280, height: 720 }
  const [minWidth, minHeight] = targetWin.getMinimumSize()
  const safeWidth = Math.max(minWidth || 620, Math.min(proposedBounds.width, area.width))
  const safeHeight = Math.max(minHeight || 380, Math.min(proposedBounds.height, area.height))
  let x = proposedBounds.x
  let y = proposedBounds.y
  const maxX = area.x + area.width - safeWidth
  const maxY = area.y + area.height - safeHeight

  if (x < area.x) x = area.x
  if (y < area.y) y = area.y
  if (x > maxX) x = maxX
  if (y > maxY) y = maxY

  return { x, y, width: safeWidth, height: safeHeight }
}

function clampWindowInsideDisplay(targetWin) {
  if (!targetWin || targetWin.isDestroyed()) return
  if (targetWin.isMinimized() || targetWin.isMaximized() || targetWin.isFullScreen()) return
  if (popupClampGuard) return

  popupClampGuard = true
  try {
    const current = targetWin.getBounds()
    const clamped = getClampedBounds(targetWin, current)
    const changed =
      clamped.x !== current.x ||
      clamped.y !== current.y ||
      clamped.width !== current.width ||
      clamped.height !== current.height
    if (changed) {
      targetWin.setBounds(clamped, false)
    }
  } finally {
    popupClampGuard = false
  }
}

function notifyPopupState(payload) {
  sendToRenderer('popup-run-state', payload)
}

function closePopupRunByKey(cmdKey) {
  const existing = popupRuns.get(cmdKey)
  if (!existing) return false
  killProcessObject(existing.proc, existing.procKind)
  try {
    if (existing.win && !existing.win.isDestroyed()) {
      existing.win.destroy()
    }
  } catch (_e) { /* BrowserWindow.destroy() error; window may already be gone */ }
  popupRuns.delete(cmdKey)
  layoutDockedPopups()
  maybeStopMetricsTicker()
  return true
}

function closeAllPopupRuns() {
  const keys = Array.from(popupRuns.keys())
  for (const key of keys) {
    closePopupRunByKey(key)
  }
}

function killAllRunningJobs() {
  closeAllPopupRuns()
  killCurrentProc()
}

function listDockedPopupContexts() {
  const docked = []
  for (const ctx of popupRuns.values()) {
    if (!ctx || !ctx.isDocked) continue
    if (!ctx.win || ctx.win.isDestroyed()) continue
    docked.push(ctx)
  }
  docked.sort((a, b) => Number(a.dockOrder || 0) - Number(b.dockOrder || 0))
  return docked
}

function layoutDockedPopups() {
  if (!win || win.isDestroyed()) return
  const docked = listDockedPopupContexts()
  if (!docked.length) return

  const host = win.getBounds()
  const slotWidth = 230
  const slotHeight = 56
  const gap = 8
  const startX = host.x + 286
  const startY = host.y + 78
  const endX = host.x + host.width - 10
  const usableWidth = Math.max(slotWidth, endX - startX)
  const perRow = Math.max(1, Math.floor((usableWidth + gap) / (slotWidth + gap)))

  for (let i = 0; i < docked.length; i++) {
    const ctx = docked[i]
    const row = Math.floor(i / perRow)
    const col = i % perRow
    const x = startX + (col * (slotWidth + gap))
    const y = startY + (row * (slotHeight + gap))
    const nextTitle = `#${i + 1} Sandbox Terminal - ${ctx.displayLabel}`
    if (ctx.win.getTitle() !== nextTitle) {
      ctx.win.setTitle(nextTitle)
    }
    ctx.win.setBounds({ x, y, width: slotWidth, height: slotHeight }, false)
    ctx.win.moveTop()
  }
}

function dockPopupWindow(ctx) {
  if (!ctx || !ctx.win || ctx.win.isDestroyed()) return
  if (ctx.isDocked) {
    layoutDockedPopups()
    return
  }

  ctx.normalBounds = ctx.win.getBounds()
  ctx.isDocked = true
  popupDockSeq += 1
  ctx.dockOrder = popupDockSeq

  try {
    ctx.win.setAlwaysOnTop(true, 'floating')
    ctx.win.setResizable(false)
    ctx.win.setSkipTaskbar(true)
  } catch (_e) { /* dock window-state changes are best-effort */ }

  layoutDockedPopups()
  notifyPopupState({ cmdKey: ctx.cmdKey, status: 'docked', runId: ctx.runId })
}

function undockPopupWindow(ctx) {
  if (!ctx || !ctx.win || ctx.win.isDestroyed()) return
  if (!ctx.isDocked) return

  ctx.isDocked = false
  try {
    ctx.win.setAlwaysOnTop(false)
    ctx.win.setResizable(true)
    ctx.win.setSkipTaskbar(false)
    ctx.win.setTitle(`Sandbox Terminal - ${ctx.displayLabel}`)
    if (ctx.normalBounds) {
      ctx.win.setBounds(getClampedBounds(ctx.win, ctx.normalBounds), false)
    }
  } catch (_e) { /* undock window-state changes are best-effort */ }

  layoutDockedPopups()
  notifyPopupState({ cmdKey: ctx.cmdKey, status: 'undocked', runId: ctx.runId })
}

function createPopupWindow(ctx) {
  const parentBounds = win && !win.isDestroyed() ? win.getBounds() : { x: 80, y: 80, width: 1080, height: 720 }
  const popupPreloadPath = fs.existsSync(path.join(__dirname, 'popup-preload.js'))
    ? path.join(__dirname, 'popup-preload.js')
    : path.join(__dirname, 'preload.js')
  const popup = new BrowserWindow({
    width: 880,
    height: 520,
    minWidth: 620,
    minHeight: 380,
    x: parentBounds.x + 32,
    y: parentBounds.y + 32,
    resizable: true,
    movable: true,
    minimizable: true,
    maximizable: true,
    frame: true,
    backgroundColor: '#00101a',
    title: `Sandbox Terminal - ${ctx.displayLabel}`,
    parent: win && !win.isDestroyed() ? win : null,
    webPreferences: {
      preload: popupPreloadPath,
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: true,
      devTools: !!isDev
    },
    show: false
  })

  popup.webContents.setWindowOpenHandler(() => ({ action: 'deny' }))
  popup.webContents.on('will-navigate', (e, url) => {
    if (!String(url || '').startsWith('file:')) {
      e.preventDefault()
      writeAudit('blocked_popup_navigation', { url: String(url || ''), runId: ctx.runId })
    }
  })

  popup.on('move', () => {
    if (ctx.isDocked) {
      layoutDockedPopups()
      return
    }
    clampWindowInsideDisplay(popup)
  })
  popup.on('resize', () => {
    if (ctx.isDocked) {
      layoutDockedPopups()
      return
    }
    clampWindowInsideDisplay(popup)
  })
  popup.on('minimize', (e) => {
    e.preventDefault()
    dockPopupWindow(ctx)
  })
  popup.on('focus', () => {
    const latest = popupRuns.get(ctx.cmdKey)
    if (!latest || latest.runId !== ctx.runId) return
    if (latest.isDocked) {
      undockPopupWindow(latest)
    }
  })
  popup.once('ready-to-show', () => {
    clampWindowInsideDisplay(popup)
    popup.show()
  })

  popup.on('closed', () => {
    popup.removeAllListeners('move')
    const latest = popupRuns.get(ctx.cmdKey)
    if (!latest || latest.runId !== ctx.runId) return
    killProcessObject(latest.proc, latest.procKind)
    popupRuns.delete(ctx.cmdKey)
    maybeStopMetricsTicker()
    layoutDockedPopups()
    notifyPopupState({ cmdKey: ctx.cmdKey, status: 'closed' })
  })

  const htmlPath = path.join(__dirname, 'web', 'popup-terminal.html')
  popup.loadFile(htmlPath, { hash: encodeURIComponent(ctx.runId) })
  return popup
}

function validateAndNormalizeCommand(cmd, args, cwd) {
  const effectiveRoot = getEffectiveProjectRoot()
  const requestedCmd = normalizeExecName(cmd)
  const requestedArgs = (args || []).map(x => String(x || ''))
  const requestedCwd = path.resolve(String(cwd || effectiveRoot))
  const restrictedPathReason = getRestrictedPathReason(requestedCwd)
  if (restrictedPathReason) {
    return {
      ok: false,
      error: restrictedPathReason
    }
  }

  if (!isDev && isNpmRunDevCommand(requestedCmd, requestedArgs)) {
    return {
      ok: false,
      error: 'npm run dev is disabled in packaged builds'
    }
  }

  const allowed = buildAllowedCommandSet(effectiveRoot)
  const directKey = commandKey(cmd, requestedArgs, requestedCwd)
  const normalizedKey = commandKey(requestedCmd, requestedArgs, requestedCwd)
  if (!allowed.has(directKey) && !allowed.has(normalizedKey)) {
    return {
      ok: false,
      error: `Command is not allowlisted: ${String(cmd || '')} ${requestedArgs.join(' ')}`
    }
  }

  const runtime = resolveRuntimeCommand(requestedCmd, requestedArgs, requestedCwd)

  return {
    ok: true,
    normalizedCmd: runtime.normalizedCmd,
    normalizedArgs: runtime.normalizedArgs,
    normalizedCwd: runtime.normalizedCwd,
    commandHash: normalizedKey,
    originalCmd: requestedCmd,
    originalArgs: requestedArgs,
    originalCwd: requestedCwd,
    rewriteInfo: runtime.rewriteInfo,
    envOverrides: runtime.envOverrides || {}
  }
}

function isNpmRunDevCommand(cmd, args) {
  const normalizedCmd = String(cmd || '').trim().toLowerCase()
  const normalizedArgs = (args || []).map(x => String(x || '').trim().toLowerCase()).filter(Boolean)
  if (!(normalizedCmd === 'npm' || normalizedCmd === 'npm.cmd')) return false
  if (normalizedArgs.length !== 2) return false
  return normalizedArgs[0] === 'run' && normalizedArgs[1] === 'dev'
}

function readPopupCspStatus() {
  try {
    const html = fs.readFileSync(path.join(__dirname, 'web', 'popup-terminal.html'), 'utf8')
    return {
      hasUnsafeInlineStyle: /style-src[^\n>]*'unsafe-inline'/.test(html)
    }
  } catch {
    return {
      hasUnsafeInlineStyle: false
    }
  }
}

function getPreferredPopupContext() {
  let focused = null
  let latest = null
  for (const ctx of popupRuns.values()) {
    if (!ctx || !ctx.win || ctx.win.isDestroyed()) continue
    if (ctx.win.isFocused()) focused = ctx
    if (!latest || Number(ctx.startedAt || 0) > Number(latest.startedAt || 0)) {
      latest = ctx
    }
  }
  return focused || latest
}

function spawnPtyWithStreaming(options) {
  const {
    normalizedCmd,
    normalizedArgs,
    normalizedCwd,
    streamMode,
    cols,
    rows,
    onOutput,
    onDone,
    onError,
    onStarted,
    auditMeta,
    envOverrides,
  } = options

  const useShell = shouldUseShellForCommand(normalizedCmd)
  let ptyFile = normalizedCmd
  let ptyArgs = normalizedArgs
  if (useShell) {
    const shellSpawn = platform.buildShellSpawn(normalizedCmd, normalizedArgs)
    ptyFile = shellSpawn.file
    ptyArgs = shellSpawn.args
  }

  const ptyCols = Number.isFinite(Number(cols)) ? Math.max(20, Math.floor(Number(cols))) : 120
  const ptyRows = Number.isFinite(Number(rows)) ? Math.max(5, Math.floor(Number(rows))) : 30
  const procEnv = {
    ...process.env,
    FORCE_COLOR: '1',
    CLICOLOR: '1',
    CLICOLOR_FORCE: '1',
    COLORTERM: 'truecolor',
    TERM: 'xterm-256color',
    npm_config_color: 'always',
    ...(envOverrides || {}),
  }

  // platform.getPtySpawnOptions() returns {} on Linux/macOS, { useConpty:true } on Windows.
  const ptyExtra = platform.getPtySpawnOptions()

  let proc
  try {
    const pty = getPtyModule()
    proc = pty.spawn(ptyFile, ptyArgs, {
      cwd: normalizedCwd,
      env: procEnv,
      cols: ptyCols,
      rows: ptyRows,
      name: 'xterm-256color',
      ...ptyExtra
    })
  } catch (err) {
    const message = err && err.message ? err.message : String(err || 'Unknown PTY error')
    onError(message)
    return null
  }

  onStarted(proc)

  const normalizedStreamMode = String(streamMode || 'realtime').toLowerCase() === 'stable'
    ? 'stable'
    : 'realtime'
  const stableFlushMs = 30
  let outputBuffer = ''
  let flushTimer = null

  function flushBufferedOutput() {
    if (outputBuffer.length > 0) {
      onOutput(outputBuffer)
      outputBuffer = ''
    }
    flushTimer = null
  }

  function queueStableOutput(chunk) {
    const text = Buffer.isBuffer(chunk) ? chunk.toString('utf8') : String(chunk || '')
    if (!text) return
    outputBuffer += text
    if (!flushTimer) {
      flushTimer = setTimeout(flushBufferedOutput, stableFlushMs)
    }
  }

  function streamOutput(chunk) {
    const text = Buffer.isBuffer(chunk) ? chunk.toString('utf8') : String(chunk || '')
    if (!text) return
    onOutput(text)
  }

  proc.onData(normalizedStreamMode === 'stable' ? queueStableOutput : streamOutput)
  proc.onExit(({ exitCode }) => {
    if (flushTimer) {
      clearTimeout(flushTimer)
      flushTimer = null
    }
    if (normalizedStreamMode === 'stable') flushBufferedOutput()
    writeAudit('run_command_done', {
      ...(auditMeta || {}),
      cmd: normalizedCmd,
      cwd: normalizedCwd,
      code: exitCode,
      streamMode: normalizedStreamMode
    })
    // node-pty can fire onData callbacks after onExit in the same tick.
    // Delay onDone by two setTimeout passes so any queued onData events
    // (final output lines) are guaranteed to drain before the popup marks Done.
    setTimeout(() => setTimeout(() => onDone(exitCode ?? 0), 0), 0)
  })

  return {
    proc,
    kind: 'pty'
  }
}

function startPopupCommand(payload) {
  const validated = validateAndNormalizeCommand(payload.cmd, payload.args, payload.cwd)
  if (!validated.ok) {
    writeAudit('blocked_command', { cmd: String(payload.cmd || ''), args: payload.args || [], cwd: payload.cwd || '', mode: 'popup' })
    return { ok: false, error: validated.error }
  }

  const { normalizedCmd, normalizedArgs, normalizedCwd, commandHash } = validated
  const restarted = closePopupRunByKey(commandHash)
  const runId = buildPopupRunId()
  const displayLabel = sanitizePopupTitle(payload.label || getCommandDisplayLine(normalizedCmd, normalizedArgs))
  const commandLine = validated.rewriteInfo && validated.rewriteInfo.applied
    ? getCommandDisplayLine(validated.originalCmd, validated.originalArgs)
    : getCommandDisplayLine(normalizedCmd, normalizedArgs)
  const rawLogCapture = openRawLogCapture('popup', commandLine, runId)

  const ctx = {
    runId,
    cmdKey: commandHash,
    displayLabel,
    normalizedCmd,
    normalizedArgs,
    normalizedCwd,
    startedAt: Date.now(),
    proc: null,
    procKind: null,
    win: null
  }

  const popup = createPopupWindow(ctx)
  ctx.win = popup
  popupRuns.set(commandHash, ctx)
  ensureMetricsTicker()

  popup.webContents.on('did-finish-load', () => {
    sendToPopup(ctx, 'meta', {
      runId,
      title: displayLabel,
      cwd: normalizedCwd,
      commandLine,
      streamMode: String(payload.streamMode || 'realtime')
    })
    sendToPopup(ctx, 'out', `▶ ${commandLine}\n${'─'.repeat(70)}\n`)
    if (rawLogCapture.filePath) {
      sendToPopup(ctx, 'out', `[INFO] Raw log file: ${rawLogCapture.filePath}\n`)
    }
  })

  writeAudit('run_command', {
    cmd: normalizedCmd,
    args: normalizedArgs,
    cwd: normalizedCwd,
    mode: 'popup',
    originalCmd: validated.originalCmd,
    originalArgs: validated.originalArgs,
    originalCwd: validated.originalCwd,
    rewrite: validated.rewriteInfo,
    runId,
    restarted
  })

  const started = spawnPtyWithStreaming({
    normalizedCmd,
    normalizedArgs,
    normalizedCwd,
    streamMode: payload.streamMode,
    cols: payload.cols,
    rows: payload.rows,
    onOutput: (text) => {
      const latest = popupRuns.get(commandHash)
      if (!latest || latest.runId !== runId || !latest.win || latest.win.isDestroyed()) return
      rawLogCapture.append(text)
      sendToPopup(latest, 'out', text)
    },
    onDone: (exitCode) => {
      const latest = popupRuns.get(commandHash)
      if (!latest || latest.runId !== runId) return
      rawLogCapture.close()
      latest.proc = null
      latest.procKind = null
      if (latest.win && !latest.win.isDestroyed()) {
        sendToPopup(latest, 'done', exitCode)
      }
      notifyPopupState({ cmdKey: commandHash, status: 'done', exitCode })
    },
    onError: (message) => {
      const latest = popupRuns.get(commandHash)
      if (!latest || latest.runId !== runId) return
      rawLogCapture.close()
      if (latest.win && !latest.win.isDestroyed()) {
        sendToPopup(latest, 'out', `\n[ERROR] Failed to start PTY: ${message}\n`)
        sendToPopup(latest, 'done', 1)
      }
      notifyPopupState({ cmdKey: commandHash, status: 'done', exitCode: 1 })
      writeAudit('run_command_error', { cmd: normalizedCmd, cwd: normalizedCwd, mode: 'popup', runId, error: message })
    },
    onStarted: (proc) => {
      const latest = popupRuns.get(commandHash)
      if (!latest || latest.runId !== runId) {
        killProcessObject(proc, 'pty')
        return
      }
      latest.proc = proc
      latest.procKind = 'pty'
    },
    auditMeta: { mode: 'popup', runId },
    envOverrides: validated.envOverrides
  })

  if (!started || !started.proc) {
    closePopupRunByKey(commandHash)
    return { ok: false, error: 'Failed to start popup command process' }
  }

  notifyPopupState({
    cmdKey: commandHash,
    status: restarted ? 'restarted' : 'started',
    runId,
    label: displayLabel,
    commandLine
  })

  return {
    ok: true,
    mode: 'popup',
    cmdKey: commandHash,
    runId,
    restarted
  }
}

function sendToRenderer(channel, data) {
  if (win && !win.isDestroyed()) {
    win.webContents.send(channel, data)
  }
}

function sanitizeLogLabel(input) {
  return String(input || 'run')
    .toLowerCase()
    .replace(/[^a-z0-9._-]+/g, '-')
    .replace(/-+/g, '-')
    .replace(/^-|-$/g, '') || 'run'
}

function openRawLogCapture(mode, cmd, runId) {
  try {
    const dir = path.join(app.getPath('userData'), 'raw-logs')
    fs.mkdirSync(dir, { recursive: true })
    const stamp = new Date().toISOString().replace(/[:.]/g, '-')
    const fileName = `${stamp}-${sanitizeLogLabel(mode)}-${sanitizeLogLabel(cmd)}-${sanitizeLogLabel(runId || process.pid)}.log`
    const filePath = path.join(dir, fileName)
    const stream = fs.createWriteStream(filePath, { flags: 'a' })

    return {
      filePath,
      append(text) {
        if (!stream || stream.destroyed) return
        if (typeof text !== 'string' || text.length === 0) return
        stream.write(text)
      },
      close() {
        if (!stream || stream.destroyed) return
        stream.end()
      }
    }
  } catch {
    return {
      filePath: null,
      append() {},
      close() {}
    }
  }
}

function writeAudit(event, meta = {}) {
  try {
    const safeMeta = { ...meta }
    delete safeMeta.accessKeyId
    delete safeMeta.secretAccessKey
    delete safeMeta.accountId
    const line = `${new Date().toISOString()} ${event} ${JSON.stringify(safeMeta)}\n`
    fs.appendFileSync(auditLogPath, line, 'utf8')
  } catch (_e) { /* audit log write failure is non-fatal */ }
}

function sanitizeExternalUrl(input) {
  try {
    const u = new URL(String(input || ''))
    const host = String(u.hostname || '').toLowerCase()
    const protocolOk = u.protocol === 'https:'
    if (!protocolOk) return { ok: false, error: 'Only https URLs are allowed' }
    if (!EXTERNAL_HOST_ALLOWLIST.has(host)) return { ok: false, error: `Host is not allowlisted: ${host}` }
    return { ok: true, url: u.toString(), host }
  } catch {
    return { ok: false, error: 'Invalid URL' }
  }
}

function normalizeExecName(cmd) {
  return platform.normalizeExecName(cmd)
}

function resolveNodeRuntimeCommand() {
  return platform.resolveNodeRuntime()
}

function isNpmRunLauncherLinuxBuildCommand(cmd, args) {
  const normalizedCmd = String(cmd || '').trim().toLowerCase()
  const normalizedArgs = (args || []).map(x => String(x || '').trim().toLowerCase()).filter(Boolean)
  if (!(normalizedCmd === 'npm' || normalizedCmd === 'npm.cmd')) return false
  if (normalizedArgs.length !== 2) return false
  if (normalizedArgs[0] !== 'run') return false
  return normalizedArgs[1] === 'build:linux:wsl' || normalizedArgs[1] === 'build:linux'
}

function isNpmRunBuildV8Command(cmd, args) {
  const normalizedCmd = String(cmd || '').trim().toLowerCase()
  const normalizedArgs = (args || []).map(x => String(x || '').trim().toLowerCase()).filter(Boolean)
  if (!(normalizedCmd === 'npm' || normalizedCmd === 'npm.cmd')) return false
  if (normalizedArgs.length !== 2) return false
  return normalizedArgs[0] === 'run' && normalizedArgs[1] === 'build-v8'
}

function materializeLauncherScript(relativePath) {
  const sourcePath = path.join(__dirname, relativePath)
  if (!fs.existsSync(sourcePath)) return null

  // External runtimes (bash/node) cannot execute scripts directly from app.asar.
  if (!/\.asar[\\/]/i.test(sourcePath)) {
    return sourcePath
  }

  const runtimeDir = path.join(app.getPath('userData'), 'runtime-scripts')
  fs.mkdirSync(runtimeDir, { recursive: true })
  const targetPath = path.join(runtimeDir, path.basename(relativePath))
  const buf = fs.readFileSync(sourcePath)
  fs.writeFileSync(targetPath, buf)

  if (process.platform !== 'win32') {
    try {
      fs.chmodSync(targetPath, 0o755)
    } catch (_e) { /* chmod may fail on some filesystems; not fatal */ }
  }

  return targetPath
}

function resolveRuntimeCommand(cmd, args, cwd) {
  const normalizedCmd = normalizeExecName(cmd)
  const normalizedArgs = (args || []).map(x => String(x || ''))
  const normalizedCwd = path.resolve(String(cwd || getEffectiveProjectRoot()))

  if (isNpmRunLauncherLinuxBuildCommand(normalizedCmd, normalizedArgs)) {
    const rewrite = platform.rewriteLinuxBuildCommand(normalizedCwd)
    return {
      normalizedCmd: rewrite.cmd,
      normalizedArgs: rewrite.args,
      normalizedCwd,
      rewriteInfo: rewrite.rewriteInfo,
      envOverrides: {}
    }
  }

  if (isNpmRunBuildV8Command(normalizedCmd, normalizedArgs)) {
    const launcherV8Script = materializeLauncherScript(path.join('scripts', 'build-v8-external.js'))
    if (launcherV8Script) {
      const nodeRuntimeCmd = resolveNodeRuntimeCommand()
      const runtimeScriptDir = path.dirname(launcherV8Script)
      return {
        normalizedCmd: nodeRuntimeCmd,
        normalizedArgs: [launcherV8Script, normalizedCwd],
        normalizedCwd: runtimeScriptDir,
        rewriteInfo: {
          applied: true,
          kind: 'launcher-build-v8',
          launcherScriptPath: launcherV8Script,
          nodeRuntimeCmd,
          targetProjectPath: normalizedCwd,
        },
        envOverrides: {}
      }
    }
  }

  return {
    normalizedCmd,
    normalizedArgs,
    normalizedCwd,
    rewriteInfo: {
      applied: false
    },
    envOverrides: {}
  }
}

function shouldUseShellForCommand(cmd) {
  return platform.shouldUseShell(cmd)
}

function commandKey(cmd, args, cwd) {
  const a = (args || []).map(x => String(x || '').trim())
  const dir = path.resolve(String(cwd || projectRoot))
  return `${String(cmd || '').trim().toLowerCase()}\u241f${a.join('\u241f').toLowerCase()}\u241f${dir.toLowerCase()}`
}

function buildAllowedCommandSet(root) {
  try {
    const pkgPath = path.join(root, 'package.json')
    const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf-8'))
    const hasAndroid = fs.existsSync(path.join(root, 'android', 'gradlew.bat'))
    const groups = buildCommandGroupsForProject(pkg, root, hasAndroid)
    const out = new Set()
    for (const g of groups) {
      for (const c of (g.cmds || [])) {
        out.add(commandKey(c.cmd, c.args || [], c.cwd || root))
      }
    }
    return out
  } catch {
    return new Set()
  }
}

function deriveAppBase(pkgName) {
  let slug = String(pkgName || 'app').toLowerCase()
  slug = slug.replace(/^@/, '').replace('/', '-')
  slug = slug.replace(/\s+/g, '-')
  slug = slug.replace(/^chahuadev-/, '')
  slug = slug.replace(/-(app|apk)$/i, '')
  return slug || 'app'
}

function normalizeCredential(value) {
  return String(value || '').replace(/[\r\n\t ]+/g, '').trim()
}

function friendlyAwsError(raw) {
  const msg = String(raw || '').trim()
  if (!msg) return 'Unknown AWS CLI error'
  if (msg.includes('SignatureDoesNotMatch')) {
    return 'SignatureDoesNotMatch: R2 credentials do not match this Account ID/Bucket. Check Account ID, Access Key, Secret Key.'
  }
  if (msg.includes('InvalidAccessKeyId')) {
    return 'InvalidAccessKeyId: R2 access key is invalid.'
  }
  if (msg.includes('AccessDenied')) {
    return 'AccessDenied: credentials are valid but do not have permission for this bucket/path.'
  }
  return msg
}

function isEncryptionReady() {
  try {
    return !!safeStorage && safeStorage.isEncryptionAvailable()
  } catch {
    return false
  }
}

function encryptValue(value) {
  if (!isEncryptionReady()) {
    throw new Error('OS encryption service is not available on this machine')
  }
  return safeStorage.encryptString(String(value)).toString('base64')
}

function decryptValue(value) {
  if (!isEncryptionReady()) {
    throw new Error('OS encryption service is not available on this machine')
  }
  return safeStorage.decryptString(Buffer.from(String(value), 'base64'))
}

function loadSecureConfigRaw() {
  if (!fs.existsSync(secureConfigPath)) return null
  try {
    return JSON.parse(fs.readFileSync(secureConfigPath, 'utf-8'))
  } catch {
    return null
  }
}

function loadSecureR2Config() {
  const raw = loadSecureConfigRaw()
  if (!raw || !raw.r2) return null
  return {
    accountId: decryptValue(raw.r2.accountId),
    bucket: decryptValue(raw.r2.bucket),
    accessKeyId: decryptValue(raw.r2.accessKeyId),
    secretAccessKey: decryptValue(raw.r2.secretAccessKey),
  }
}

function saveSecureR2Config(cfg) {
  const raw = loadSecureConfigRaw() || { version: 1 }
  const payload = {
    ...raw,
    version: 1,
    updatedAt: new Date().toISOString(),
    r2: {
      accountId: encryptValue(cfg.accountId),
      bucket: encryptValue(cfg.bucket),
      accessKeyId: encryptValue(cfg.accessKeyId),
      secretAccessKey: encryptValue(cfg.secretAccessKey),
    }
  }
  fs.writeFileSync(secureConfigPath, JSON.stringify(payload, null, 2), 'utf-8')
}

function maskMiddle(value, left = 4, right = 4) {
  const s = String(value || '')
  if (!s) return ''
  if (s.length <= left + right) return '*'.repeat(Math.max(6, s.length))
  return `${s.slice(0, left)}${'*'.repeat(Math.max(6, s.length - (left + right)))}${s.slice(-right)}`
}

function listR2Folders(cfg) {
  const endpoint = `https://${cfg.accountId}.r2.cloudflarestorage.com`
  const env = {
    ...process.env,
    AWS_ACCESS_KEY_ID: cfg.accessKeyId,
    AWS_SECRET_ACCESS_KEY: cfg.secretAccessKey,
    AWS_DEFAULT_REGION: 'auto'
  }
  const result = spawnSync(normalizeExecName('aws'), ['s3', 'ls', `s3://${cfg.bucket}/`, '--endpoint-url', endpoint], {
    env,
    shell: false,
    windowsHide: true,
    encoding: 'utf8'
  })

  if (result.error) {
    throw new Error(`Unable to run AWS CLI: ${result.error.message}`)
  }
  if (result.status !== 0) {
    const msg = friendlyAwsError(result.stderr || result.stdout || 'Unknown AWS CLI error')
    throw new Error(`AWS CLI failed while listing bucket: ${msg}`)
  }

  const lines = (result.stdout || '').split(/\r?\n/)
  const out = []
  for (const line of lines) {
    const m = line.match(/\bPRE\s+([^\s/]+)\/?/)
    if (m && m[1]) out.push(m[1])
  }
  return out
}

function testR2Config(cfg) {
  const endpoint = `https://${cfg.accountId}.r2.cloudflarestorage.com`
  const env = {
    ...process.env,
    AWS_ACCESS_KEY_ID: cfg.accessKeyId,
    AWS_SECRET_ACCESS_KEY: cfg.secretAccessKey,
    AWS_DEFAULT_REGION: 'auto'
  }

  const result = spawnSync(normalizeExecName('aws'), ['s3', 'ls', `s3://${cfg.bucket}/`, '--endpoint-url', endpoint], {
    env,
    shell: false,
    windowsHide: true,
    encoding: 'utf8'
  })

  if (result.error) {
    return { ok: false, error: `Unable to run AWS CLI: ${result.error.message}` }
  }
  if (result.status !== 0) {
    return { ok: false, error: friendlyAwsError(result.stderr || result.stdout || 'Unknown AWS CLI error') }
  }
  return { ok: true }
}

function chooseR2Target(folders, appBase) {
  if (!folders.length) return appBase
  const exact = folders.find(f => f.toLowerCase() === appBase.toLowerCase())
  if (exact) return exact
  const contains = folders.find(f => f.toLowerCase().includes(appBase.toLowerCase()))
  if (contains) return contains
  return appBase
}

function clearSecureR2Config() {
  try {
    if (fs.existsSync(secureConfigPath)) fs.unlinkSync(secureConfigPath)
    return { ok: true }
  } catch (e) {
    return { ok: false, error: e.message }
  }
}

function listR2UploadCandidates(distPath) {
  const exts = new Set(['.exe', '.msi', '.appimage'])
  const out = []
  const stack = [distPath]

  while (stack.length > 0) {
    const dir = stack.pop()
    const entries = fs.readdirSync(dir, { withFileTypes: true })
    for (const entry of entries) {
      const abs = path.join(dir, entry.name)
      if (entry.isDirectory()) {
        stack.push(abs)
        continue
      }
      if (!entry.isFile()) continue

      const ext = path.extname(entry.name).toLowerCase()
      if (!exts.has(ext)) continue

      const rel = path.relative(distPath, abs).replace(/\\/g, '/')
      out.push({ abs, rel })
    }
  }

  out.sort((a, b) => a.rel.localeCompare(b.rel))
  return out
}

function prettyCmdLabel(cmd, args) {
  const c = String(cmd || '').trim()
  const a = (args || []).map(x => String(x || '').trim()).filter(Boolean)
  if (!c) return ''
  return [c, ...a].join(' ')
}

// ── Project type detection (Node side — not exposed to renderer) ──────────────
function detectType(pkg) {
  const d = { ...pkg.dependencies, ...pkg.devDependencies, ...pkg.peerDependencies }
  const has = (name) => !!d[name]

  const kinds = []
  if (has('electron')) kinds.push('Electron')
  if (has('expo')) kinds.push('Expo')
  if (has('react-native')) kinds.push('React Native')
  if (has('next')) kinds.push('Next.js')
  if (has('vite')) kinds.push('Vite')
  if (has('@angular/core')) kinds.push('Angular')
  if (has('nuxt') || has('nuxt3')) kinds.push('Nuxt')
  if (has('svelte') || has('@sveltejs/kit')) kinds.push('Svelte')
  if (has('astro')) kinds.push('Astro')
  if (has('remix') || has('@remix-run/node')) kinds.push('Remix')
  if (has('gatsby')) kinds.push('Gatsby')
  if (has('vue')) kinds.push('Vue')
  if (has('react')) kinds.push('React')
  if (has('nestjs') || has('@nestjs/core')) kinds.push('NestJS')
  if (has('express')) kinds.push('Express')
  if (has('fastify')) kinds.push('Fastify')
  if (has('koa')) kinds.push('Koa')

  const primaryType =
    has('electron') ? 'electron' :
    has('expo') ? 'expo' :
    has('react-native') ? 'rn' :
    has('next') ? 'nextjs' :
    has('vite') ? 'vite' :
    'npm'

  const badgeClass =
    primaryType === 'expo' ? 'badge-expo' :
    primaryType === 'rn' ? 'badge-rn' :
    primaryType === 'electron' ? 'badge-electron' :
    primaryType === 'nextjs' ? 'badge-nextjs' :
    primaryType === 'vite' ? 'badge-vite' :
    'badge-npm'

  const withNode = kinds.includes('Node.js') ? kinds : [...kinds, 'Node.js']
  const label = withNode.length ? withNode.join(' + ') : 'Node.js'
  return { type: primaryType, label, badgeClass }
}

function getRuntimeOsStatus() {
  const p = String(process.platform || '').toLowerCase()
  if (p === 'win32') return { platform: p, label: 'Windows' }
  if (p === 'darwin') return { platform: p, label: 'macOS' }
  if (p === 'linux') return { platform: p, label: 'Linux' }
  return { platform: p || 'unknown', label: p || 'Unknown' }
}

function buildGroups(pkg, root, hasAndroid) {
  const d = { ...pkg.dependencies, ...pkg.devDependencies, ...pkg.peerDependencies }
  const has = (name) => !!d[name]
  const isExpoLike = has('expo') || has('react-native')
  const isElectron = has('electron')
  const isNext = has('next')
  const isVite = has('vite')
  const androidPath = path.join(root, 'android')
  const groups = []

  // ── Expo / RN ────────────────────────────────────────────────────────────────
  if (isExpoLike) {
    groups.push({
      label: 'Expo / Metro', icon: 'expo', color: '#7c6cf6',
      cmds: [
        { label: 'expo start',       cmd: 'npx', args: ['expo', 'start'],                              cwd: root },
        { label: 'expo run:android', cmd: 'npx', args: ['expo', 'run:android'],                        cwd: root },
        { label: 'expo prebuild',    cmd: 'npx', args: ['expo', 'prebuild', '--platform', 'android'],  cwd: root },
      ]
    })
    if (hasAndroid) {
      groups.push({
        label: 'Android / Gradle', icon: 'android', color: '#3ddc84',
        cmds: [
          { label: 'installDebug ▶',  cmd: 'gradlew.bat', args: ['app:installDebug',   '--daemon', '--console=rich'], cwd: androidPath },
          { label: 'installRelease',  cmd: 'gradlew.bat', args: ['app:installRelease', '--daemon', '--console=rich'], cwd: androidPath },
          { label: 'assembleDebug',   cmd: 'gradlew.bat', args: ['app:assembleDebug',  '--daemon', '--console=rich'], cwd: androidPath },
          { label: 'assembleRelease', cmd: 'gradlew.bat', args: ['app:assembleRelease','--daemon', '--console=rich'], cwd: androidPath },
          { label: 'clean',           cmd: 'gradlew.bat', args: ['clean', '--console=rich'], cwd: androidPath },
          { label: 'clean + install', cmd: 'gradlew.bat', args: ['clean','app:installDebug','--daemon', '--console=rich'], cwd: androidPath },
        ]
      })
      groups.push({
        label: 'ADB', icon: 'adb', color: '#f39c12',
        cmds: [
          { label: 'adb devices', cmd: 'adb', args: ['devices'],                          cwd: root },
          { label: 'adb logcat',  cmd: 'adb', args: ['logcat'],                           cwd: root },
          { label: 'adb reverse', cmd: 'adb', args: ['reverse','tcp:8081','tcp:8081'],    cwd: root },
        ]
      })
    }
  }

  // ── Electron ─────────────────────────────────────────────────────────────────
  const usedScripts = new Set()
  if (isElectron) {
    const launcherManagedBuildKeys = ['build-v8', 'build:linux', 'build:linux:wsl']
    const buildKeys = ['build','build-win','build-exe','build-v8','build-nsis','build-msi','build:linux','build:linux:wsl','pack','dist']
    const scriptedBuildKeys = buildKeys.filter(s => (pkg.scripts || {})[s])
    const foundKeys = Array.from(new Set([...launcherManagedBuildKeys, ...scriptedBuildKeys]))
    foundKeys.forEach(s => usedScripts.add(s))
    if (foundKeys.length) {
      groups.push({
        label: 'Electron Build', icon: 'electron', color: '#47c4e2',
        cmds: foundKeys.map(s => ({ label: prettyCmdLabel('npm', ['run', s]), cmd: 'npm', args: ['run', s], cwd: root }))
      })
    }
  }

  // ── Next.js ──────────────────────────────────────────────────────────────────
  if (isNext) {
    groups.push({
      label: 'Next.js', icon: 'nextjs', color: '#ffffff',
      cmds: [
        { label: prettyCmdLabel('npm', ['run','dev']),   cmd: 'npm', args: ['run','dev'],   cwd: root },
        { label: prettyCmdLabel('npm', ['run','build']), cmd: 'npm', args: ['run','build'], cwd: root },
        { label: prettyCmdLabel('npm', ['run','start']), cmd: 'npm', args: ['run','start'], cwd: root },
        { label: prettyCmdLabel('npm', ['run','lint']),  cmd: 'npm', args: ['run','lint'],  cwd: root },
      ]
    })
  }

  // ── Vite ─────────────────────────────────────────────────────────────────────
  if (isVite) {
    groups.push({
      label: 'Vite', icon: 'vite', color: '#bd34fe',
      cmds: [
        { label: prettyCmdLabel('npm', ['run','dev']),     cmd: 'npm', args: ['run','dev'],     cwd: root },
        { label: prettyCmdLabel('npm', ['run','build']),   cmd: 'npm', args: ['run','build'],   cwd: root },
        { label: prettyCmdLabel('npm', ['run','preview']), cmd: 'npm', args: ['run','preview'], cwd: root },
      ]
    })
  }

  // ── NPM Scripts (auto from package.json) ──────────────────────────────────────
  const scripts = pkg.scripts || {}
  const skipPrefixes = ['pre', 'post']
  const scriptEntries = Object.keys(scripts).filter(s =>
    !skipPrefixes.some(p => s.startsWith(p)) && !usedScripts.has(s)
  )
  if (scriptEntries.length) {
    groups.push({
      label: 'NPM Scripts', icon: 'scripts', color: '#f7c948',
      cmds: scriptEntries.map(s => ({ label: prettyCmdLabel('npm', ['run', s]), cmd: 'npm', args: ['run', s], cwd: root }))
    })
  }

  // ── Always: npm install ───────────────────────────────────────────────────────
  groups.push({
    label: 'NPM', icon: 'npm', color: '#e84040',
    cmds: [
      { label: 'npm install',                    cmd: 'npm', args: ['install'],                       cwd: root },
      { label: 'npm install --legacy-peer-deps', cmd: 'npm', args: ['install','--legacy-peer-deps'],  cwd: root },
      { label: 'npm ci',                         cmd: 'npm', args: ['ci'],                            cwd: root },
    ]
  })

  return groups
}

// ── IPC: get project info (returns processed data only — no raw pkg exposed) ──
ipcMain.handle('get-project', () => {
  const runtimeOs = getRuntimeOsStatus()
  const root = getEffectiveProjectRoot()
  const blockedReason = getRestrictedPathReason(root)
  if (blockedReason) {
    return {
      ok: false,
      blocked: true,
      error: blockedReason,
      projectRoot: root,
      isDev,
      runtimeOs
    }
  }
  const pkgPath = path.join(root, 'package.json')
  try {
    const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf-8'))
    const hasAndroid = fs.existsSync(path.join(root, 'android', 'gradlew.bat'))
    const typeInfo = isExternalDevOnlyModeForRoot(root)
      ? { type: 'npm-dev-only', label: 'NPM Dev Mode', badgeClass: 'badge-npm' }
      : detectType(pkg)
    const groups = buildCommandGroupsForProject(pkg, root, hasAndroid)
    return {
      ok: true,
      projectRoot: root,
      projectName: pkg.name || null,
      typeInfo,   // { type, label, badgeClass }
      groups,     // ready-to-render — no raw pkg sent to renderer
      isDev,      // true only when running via bat/cmd (not packaged)
      runtimeOs,
    }
  } catch (e) {
    return { ok: false, error: e.message, projectRoot: root, isDev, runtimeOs }
  }
})

ipcMain.handle('select-project-folder', async (_, mode = 'full-project') => {
  return chooseExternalProjectFolder(mode === 'npm-run-dev-only' ? 'npm-run-dev-only' : 'full-project')
})

ipcMain.handle('use-launcher-project', () => {
  return useLauncherProjectRoot()
})

// ── IPC: run a command ────────────────────────────────────────────────────────
ipcMain.handle('run-cmd', (event, { cmd, args, cwd, streamMode, cols, rows }) => {
  killCurrentProc()

  const validated = validateAndNormalizeCommand(cmd, args, cwd)
  if (!validated.ok) {
    writeAudit('blocked_command', { cmd: String(cmd || ''), args: args || [], cwd: cwd || '', mode: 'main' })
    const msg = validated.error
    sendToRenderer('proc-out', `\n[ERROR] ${msg}\n`)
    sendToRenderer('proc-done', 1)
    return { ok: false, error: msg }
  }

  const normalizedCmd = validated.normalizedCmd
  const normalizedArgs = validated.normalizedArgs
  const normalizedCwd = validated.normalizedCwd
  currentMainCommandKey = validated.commandHash
  const commandLine = validated.rewriteInfo && validated.rewriteInfo.applied
    ? getCommandDisplayLine(validated.originalCmd, validated.originalArgs)
    : getCommandDisplayLine(normalizedCmd, normalizedArgs)
  const rawLogCapture = openRawLogCapture('main', commandLine, currentMainCommandKey)

  if (validated.rewriteInfo && validated.rewriteInfo.applied) {
    sendToRenderer('proc-out', `[INFO] Rewriting ${validated.originalCmd} ${validated.originalArgs.join(' ')} via launcher (${validated.rewriteInfo.kind})\n`)
    if (validated.rewriteInfo.launcherScriptPath) {
      sendToRenderer('proc-out', `[INFO] Launcher script: ${validated.rewriteInfo.launcherScriptPath}\n`)
    }
    sendToRenderer('proc-out', `[INFO] Target project: ${validated.rewriteInfo.targetProjectPath}\n`)
  }
  if (rawLogCapture.filePath) {
    sendToRenderer('proc-out', `[INFO] Raw log file: ${rawLogCapture.filePath}\n`)
  }

  writeAudit('run_command', {
    cmd: normalizedCmd,
    args: normalizedArgs,
    cwd: normalizedCwd,
    mode: 'main',
    originalCmd: validated.originalCmd,
    originalArgs: validated.originalArgs,
    originalCwd: validated.originalCwd,
    rewrite: validated.rewriteInfo
  })

  const started = spawnPtyWithStreaming({
    normalizedCmd,
    normalizedArgs,
    normalizedCwd,
    streamMode,
    cols,
    rows,
    onOutput: (text) => {
      rawLogCapture.append(text)
      sendToRenderer('proc-out', text)
    },
    onDone: (exitCode) => {
      rawLogCapture.close()
      currentProc = null
      currentProcKind = null
      currentMainCommandKey = null
      setImmediate(() => sendToRenderer('proc-done', exitCode ?? 0))
    },
    onError: (message) => {
      rawLogCapture.close()
      sendToRenderer('proc-out', `\n[ERROR] Failed to start PTY: ${message}\n`)
      sendToRenderer('proc-done', 1)
      currentMainCommandKey = null
      writeAudit('run_command_error', { cmd: normalizedCmd, cwd: normalizedCwd, mode: 'main', error: message })
    },
    onStarted: (proc) => {
      currentProc = proc
      currentProcKind = 'pty'
    },
    auditMeta: { mode: 'main' },
    envOverrides: validated.envOverrides
  })

  if (!started || !started.proc) {
    return { ok: false, error: 'Failed to start process' }
  }

  return { ok: true, pid: started.proc.pid, mode: 'main', cmdKey: currentMainCommandKey }
})

ipcMain.handle('run-cmd-popup', (_, payload) => {
  return startPopupCommand(payload || {})
})

ipcMain.handle('open-devtools-for-command', (_, payload) => {
  if (!isDev) {
    return { ok: false, error: 'DevTools are disabled in packaged builds' }
  }
  const cmd = payload && payload.cmd
  const args = payload && payload.args
  if (!isNpmRunDevCommand(cmd, args)) {
    return { ok: false, error: 'DevTools can only be opened for npm run dev' }
  }
  if (!win || win.isDestroyed()) {
    return { ok: false, error: 'Main window is not available' }
  }
  try {
    win.webContents.openDevTools({ mode: 'detach', activate: true })
    void writeAudit('open_devtools_for_command', { cmd: String(cmd || ''), args: args || [] })
    return { ok: true }
  } catch (e) {
    return { ok: false, error: e && e.message ? e.message : 'Failed to open DevTools' }
  }
})

ipcMain.handle('open-main-devtools', () => {
  if (!isDev) {
    return { ok: false, error: 'DevTools are disabled in packaged builds' }
  }
  if (!win || win.isDestroyed()) {
    return { ok: false, error: 'Main window is not available' }
  }
  try {
    win.webContents.openDevTools({ mode: 'detach', activate: true })
    return { ok: true }
  } catch (e) {
    return { ok: false, error: e && e.message ? e.message : 'Failed to open main DevTools' }
  }
})

ipcMain.handle('open-popup-devtools', () => {
  if (!isDev) {
    return { ok: false, error: 'DevTools are disabled in packaged builds' }
  }
  const ctx = getPreferredPopupContext()
  if (!ctx || !ctx.win || ctx.win.isDestroyed()) {
    return { ok: false, error: 'No active popup terminal' }
  }
  try {
    ctx.win.webContents.openDevTools({ mode: 'detach', activate: true })
    return { ok: true, runId: ctx.runId }
  } catch (e) {
    return { ok: false, error: e && e.message ? e.message : 'Failed to open popup DevTools' }
  }
})

ipcMain.handle('get-dev-security-status', () => {
  if (!isDev) {
    return {
      ok: true,
      appMode: 'packaged',
      requestGuardInstalled,
      externalRequestBlockActive: true,
      shortcutDevtoolsBlockedInProduction: true,
      mainWindowDevtoolsCapable: false,
      popupWindowDevtoolsCapable: false,
      popupCspInlineStyleAllowed: false,
      popupRunCount: 0,
      securityNote: 'Dev mode features are disabled in packaged builds.'
    }
  }
  const popupCsp = readPopupCspStatus()
  const activePopupCount = Array.from(popupRuns.values()).filter(ctx => ctx && ctx.win && !ctx.win.isDestroyed()).length
  return {
    ok: true,
    appMode: isDev ? 'dev' : 'packaged',
    requestGuardInstalled,
    externalRequestBlockActive: !isDev,
    shortcutDevtoolsBlockedInProduction: !isDev,
    mainWindowDevtoolsCapable: true,
    popupWindowDevtoolsCapable: true,
    popupCspInlineStyleAllowed: popupCsp.hasUnsafeInlineStyle,
    popupRunCount: activePopupCount,
    securityNote: 'DevTools open via button is allowed. Keyboard shortcuts remain blocked in production.'
  }
})

// ── IPC: kill current process ─────────────────────────────────────────────────
ipcMain.handle('kill-proc', () => {
  if (!currentProc) return false
  killCurrentProc()
  sendToRenderer('proc-done', -1)
  return true
})

ipcMain.handle('resize-proc-pty', (_, size) => {
  if (!currentProc || currentProcKind !== 'pty' || typeof currentProc.resize !== 'function') {
    return false
  }
  const cols = Number(size && size.cols)
  const rows = Number(size && size.rows)
  if (!Number.isFinite(cols) || !Number.isFinite(rows)) return false

  const safeCols = Math.max(20, Math.floor(cols))
  const safeRows = Math.max(5, Math.floor(rows))
  try {
    currentProc.resize(safeCols, safeRows)
    return true
  } catch {
    return false
  }
})

ipcMain.handle('popup-kill', (_, { runId }) => {
  const rid = String(runId || '')
  for (const ctx of popupRuns.values()) {
    if (!ctx || ctx.runId !== rid) continue
    killProcessObject(ctx.proc, ctx.procKind)
    return true
  }
  return false
})

ipcMain.handle('popup-resize', (_, { runId, cols, rows }) => {
  const rid = String(runId || '')
  const safeCols = Math.max(20, Math.floor(Number(cols || 0)))
  const safeRows = Math.max(5, Math.floor(Number(rows || 0)))
  if (!Number.isFinite(safeCols) || !Number.isFinite(safeRows)) return false

  for (const ctx of popupRuns.values()) {
    if (!ctx || ctx.runId !== rid) continue
    if (!ctx.proc || ctx.procKind !== 'pty' || typeof ctx.proc.resize !== 'function') return false
    try {
      ctx.proc.resize(safeCols, safeRows)
      return true
    } catch {
      return false
    }
  }
  return false
})

ipcMain.handle('open-external', (_, url) => {
  const checked = sanitizeExternalUrl(url)
  if (!checked.ok) {
    writeAudit('blocked_open_external', { reason: checked.error, requested: String(url || '') })
    return false
  }
  writeAudit('open_external', { host: checked.host })
  shell.openExternal(checked.url)
  return true
})

ipcMain.handle('r2-get-config-status', () => {
  return { ok: false, error: 'R2 moved to dedicated app: chahuadev-R2' }
})

ipcMain.handle('r2-save-config', (_, cfg) => {
  return { ok: false, error: 'R2 moved to dedicated app: chahuadev-R2' }
})

ipcMain.handle('r2-test-config', (_, cfg) => {
  return { ok: false, error: 'R2 moved to dedicated app: chahuadev-R2' }
})

ipcMain.handle('r2-clear-config', () => {
  return { ok: true }
})

ipcMain.handle('r2-suggest-target', () => {
  return { ok: false, error: 'R2 moved to dedicated app: chahuadev-R2' }
})

ipcMain.handle('r2-upload-dist', (_, { target }) => {
  sendToRenderer('proc-out', '\n[ERROR] R2 moved to dedicated app: chahuadev-R2\n')
  sendToRenderer('proc-done', 1)
  return { ok: false, error: 'R2 moved to dedicated app: chahuadev-R2' }
})