# Install from caches filled by download-deps.ps1. Unpacks the official Node zip
# into .offline-cache/node/runtime and prepends it to PATH so the offline machine
# does not need a system Node. Fails if any lockfile package is missing from
# .offline-store (no registry access).
#
# Usage (repo root):  powershell -File scripts/offline/install-deps.ps1 [-Build]
[CmdletBinding()]
param(
  [switch]$Build
)
$ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest

$Root = (Resolve-Path (Join-Path $PSScriptRoot '..\..')).Path
Set-Location $Root

function Import-OfflineNode {
  $nodeCache = Join-Path $Root '.offline-cache\node'
  $metaPath = Join-Path $nodeCache 'runtime.json'
  if (-not (Test-Path $metaPath)) {
    throw "Missing $metaPath. Run scripts/offline/download-deps.ps1 on a networked machine first, then copy the checkout."
  }
  $meta = Get-Content $metaPath -Raw | ConvertFrom-Json
  $archivePath = Join-Path $nodeCache ([string]$meta.archive)
  $runtimeDir = Join-Path $nodeCache 'runtime'
  $nodeHome = Join-Path $runtimeDir ("node-v{0}-{1}" -f $meta.version, $meta.platform)
  if (-not (Test-Path (Join-Path $nodeHome 'node.exe'))) {
    if (-not (Test-Path $archivePath)) {
      throw "Missing Node archive $archivePath. Re-run download-deps.ps1."
    }
    if (Test-Path $runtimeDir) { Remove-Item -Recurse -Force $runtimeDir }
    New-Item -ItemType Directory -Force -Path $runtimeDir | Out-Null
    Expand-Archive -LiteralPath $archivePath -DestinationPath $runtimeDir
  }
  if (-not (Test-Path (Join-Path $nodeHome 'node.exe'))) {
    throw "Unpacked Node is missing: $nodeHome\node.exe"
  }
  $env:PATH = "$nodeHome;$env:PATH"
  return $nodeHome
}

$nodeHome = Import-OfflineNode
$storeDir = Join-Path $Root '.offline-store'
$corepackHome = Join-Path $Root '.offline-cache\corepack'
if (-not (Test-Path $storeDir)) {
  throw "Missing $storeDir. Run scripts/offline/download-deps.ps1 on a networked machine first, then copy the checkout."
}
if (-not (Test-Path $corepackHome)) {
  throw "Missing $corepackHome. Re-run download-deps.ps1 so Corepack pnpm is cached in-repo."
}

$env:COREPACK_HOME = $corepackHome
$env:COREPACK_ENABLE_NETWORK = '0'

$manifest = Get-Content (Join-Path $Root 'package.json') -Raw | ConvertFrom-Json
$packageManager = [string]$manifest.packageManager
$corepack = Join-Path $nodeHome 'corepack.cmd'

Write-Host "Offline install $packageManager from $storeDir (Node $(& (Join-Path $nodeHome 'node.exe') --version))"
& $corepack pnpm install --offline --frozen-lockfile --store-dir $storeDir

if ($Build) {
  Write-Host 'Building host/client libs, then the web frontend'
  npm run build:lib
  & $corepack pnpm --dir apps/web run build
  Write-Host "Build complete. Start the UI with: `"$nodeHome\corepack.cmd`" pnpm dsh web"
} else {
  Write-Host 'Install complete. For dsh web also run: powershell -File scripts/offline/install-deps.ps1 -Build'
}