/* BARE_OS_BIN_API 1.0.0 — bump when staged /bin script semantics change (see developer guide). */
/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
function bareStdin(ctx) {
  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
}

/** @param {number} mode @param {'file' | 'directory' | 'symlink'} type */
function bareFormatModeString(mode, type) {
  const typeChar = type === 'directory' ? 'd' : type === 'symlink' ? 'l' : '-'
  const perm = mode & 0o777
  const r = (bit) => (perm & bit ? 'r' : '-')
  const w = (bit) => (perm & bit ? 'w' : '-')
  const x = (bit) => (perm & bit ? 'x' : '-')
  return (
    typeChar +
    r(0o400) +
    w(0o200) +
    x(0o100) +
    r(0o040) +
    w(0o020) +
    x(0o010) +
    r(0o004) +
    w(0o002) +
    x(0o001)
  )
}

/** @param {number} mtimeMs @param {number} [nowMs] */
function bareFormatLsMtime(mtimeMs, nowMs) {
  const now = nowMs != null ? nowMs : Date.now()
  const d = new Date(mtimeMs)
  const months = [
    'Jan',
    'Feb',
    'Mar',
    'Apr',
    'May',
    'Jun',
    'Jul',
    'Aug',
    'Sep',
    'Oct',
    'Nov',
    'Dec'
  ]
  const mon = months[d.getMonth()]
  const day = String(d.getDate()).padStart(2, ' ')
  const sixMo = 180 * 24 * 3600 * 1000
  if (Math.abs(now - mtimeMs) > sixMo) {
    const yr = String(d.getFullYear()).padStart(4, ' ')
    return mon + ' ' + day + '  ' + yr
  }
  const hh = String(d.getHours()).padStart(2, '0')
  const mm = String(d.getMinutes()).padStart(2, '0')
  return mon + ' ' + day + ' ' + hh + ':' + mm
}

/** @param {number} size */
function barePosixBlocks(size) {
  return Math.ceil(Number(size) / 512) || 0
}

/**
 * Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
 * If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
 * @param {Record<string, unknown>} ctx
 * @param {string | Uint8Array} chunk
 * @returns {boolean}
 */
function bareOsEmitRaw(ctx, chunk) {
  if (typeof ctx.bareOsBinWrite === 'function') {
    const b4 = ctx.b4a
    const u8 =
      typeof chunk === 'string'
        ? b4 && typeof b4.from === 'function'
          ? b4.from(chunk)
          : new TextEncoder().encode(chunk)
        : chunk
    ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
    return true
  }
  const w = globalThis.process?.stdout?.write
  if (typeof w === 'function') {
    w.call(globalThis.process.stdout, chunk)
    return true
  }
  return false
}

/**
 * pear — Pear development tools inside Bare OS.
 *
 * Provides access to the Pear runtime stack (build, bundle, stage, release, seed)
 * from within a booted Bare OS guest via the new ctx.pear surface.
 *
 * See docs/design/ctx-pear-surface-and-bare-audit-plan.md for the full plan and design.
 */

function printHelp(argv0 = 'pear') {
  console.log(`${argv0} — Pear development surface for Bare OS

Usage:
  ${argv0} help
  ${argv0} info
  ${argv0} list
  ${argv0} stage [dir]          (stub — will use ctx.pear.pearBuild)
  ${argv0} build [dir]          (alias for stage in v1)

The ctx.pear surface exposes selected Pear and Bare build/bundling packages
(pear-build, pear-bundle, bare-bundle-compile, etc.) when BARE_OS_BARE_MODULES
is enabled.

Many operations (full release, seeding, live sidecar IPC) currently delegate to
a host Pear sidecar (when available) following the same pattern as peerctl and
the P2P App Store.

Pear apps you create here are natural citizens of the P2P App Store:
  - Stage your app with Pear tooling
  - Publish it via `appstore` (or directly as a pear:// package)
  - Other users can discover and run it

Use the `pear-dev` agent skill together with the `appstore` skill for
autonomous "build Pear app → publish to my store" workflows.
`)
}

async function cmdInfo(ctx) {
  console.log('pear — Pear development tools (ctx.pear surface)')
  console.log('Bare OS version of selected Pear runtime packages.')
  console.log('')
  if (ctx.pear && typeof ctx.pear === 'object') {
    const keys = Object.keys(ctx.pear).sort()
    console.log(`Exposed on ctx.pear (${keys.length} packages):`)
    for (const k of keys) {
      const val = ctx.pear[k]
      const type = typeof val
      console.log(`  ${k.padEnd(20)} ${type}`)
    }
  } else {
    console.log('ctx.pear is not currently populated (BARE_OS_BARE_MODULES may be disabled).')
  }
  console.log('')
  console.log('Run "pear list" for the same view.')
}

async function cmdList(ctx) {
  if (!ctx.pear || typeof ctx.pear !== 'object') {
    console.log('ctx.pear is not available in this environment.')
    return
  }
  const keys = Object.keys(ctx.pear).sort()
  if (keys.length === 0) {
    console.log('No packages currently exposed on ctx.pear.')
    return
  }
  console.log(`ctx.pear — ${keys.length} package(s) available:\n`)
  for (const k of keys) {
    console.log(`  ${k}`)
  }
}

async function cmdInit(ctx, targetDir = '.') {
  const name = 'my-pear-app'
  const dir = targetDir === '.' ? `${(ctx.env?.HOME || '/home/guest')}/pear-projects/${name}` : targetDir

  console.log(`pear init: creating minimal Pear app skeleton at ${dir} (stub implementation)`)

  try {
    await ctx.vfs.mkdir(dir, { recursive: true })
    const packageJson = {
      name,
      version: '0.1.0',
      main: 'index.js',
      type: 'module',
      pear: {
        name: 'my-pear-app',
        type: 'desktop'
      }
    }
    await ctx.vfs.writeFile(`${dir}/package.json`, ctx.b4a.from(JSON.stringify(packageJson, null, 2)))
    await ctx.vfs.writeFile(`${dir}/index.js`, ctx.b4a.from('console.log("Hello from my Pear app!");\n'))
    console.log('Created basic package.json + index.js')
    console.log('Next (when fully wired): run "pear stage ' + dir + '" using ctx.pear.pearBuild')
  } catch (err) {
    console.error('Failed to init:', err?.message || err)
  }
}

// The coreutils runner executes this file body with `ctx` in scope.
// We run the command logic directly at the bottom (consistent with other commands like appstore).

const sub = (typeof argv !== 'undefined' && argv[1] ? argv[1] : 'help').toLowerCase()

switch (sub) {
  case 'help':
  case '--help':
  case '-h':
    printHelp(typeof argv !== 'undefined' ? argv[0] : 'pear')
    break
  case 'info':
    await cmdInfo(ctx)
    break
  case 'list':
  case 'ls':
    await cmdList(ctx)
    break
  case 'stage':
  case 'build':
    const target = (typeof argv !== 'undefined' ? argv[2] : null) || '.'
    if (ctx.pear && ctx.pear.pearBuild) {
      console.log(`Attempting stage of ${target} using ctx.pear.pearBuild (early integration)...`)
      try {
        console.log('ctx.pear.pearBuild is available. Full stage pipeline landing in upcoming plan items.')
        console.log('Exposed Pear build surface:', Object.keys(ctx.pear).filter(k => k.toLowerCase().includes('build') || k.toLowerCase().includes('bundle')))
      } catch (e) {
        console.error('Stage attempt error:', e?.message || e)
      }
    } else {
      console.log('pear stage / build: advanced integration in progress (ctx.pear.pearBuild available).')
      console.log('Current exposed packages on ctx.pear:')
      await cmdList(ctx)
    }
    break
  case 'init':
    await cmdInit(ctx, (typeof argv !== 'undefined' ? argv[2] : null))
    break
  default:
    console.error(`Unknown subcommand: ${sub}`)
    printHelp(typeof argv !== 'undefined' ? argv[0] : 'pear')
    break
}