<#
.SYNOPSIS
    Build the Windows installer: Electron client + bundled Python node.

.DESCRIPTION
    The Windows counterpart of packaging/build/build-client.sh. Produces a
    single per-user NSIS installer (MeshBay-Setup-<version>.exe) that lays down
    the Electron app and, beside it under resources/node-runtime/, the frozen
    meshbay-node daemon. No hub -- a desktop machine installs client + node
    (+ common, which is inside the node runtime).

    Steps:
      1. Node >= 22 check
      2. npm ci  (+ approve Electron's install script, download Chromium)
      3. bump Electron to the latest release  (Chromium CVE policy -- see
         build-client.sh; skip with -NoElectronBump)
      4. npm run sync-ui        (copy the interface from the hub package)
      5. build-node-runtime.ps1 (PyInstaller freeze of the daemon)
      6. electron-builder --win nsis

.PARAMETER FfmpegDir
    Passed through to build-node-runtime.ps1 -- directory with ffmpeg.exe /
    ffprobe.exe to bundle. Optional; without it the node uses PATH.

.PARAMETER NoElectronBump
    Keep the pinned Electron instead of upgrading to the latest release.

.PARAMETER SkipNodeRuntime
    Reuse an existing packages/meshbay-client/node-runtime/ (faster iteration
    on the electron-builder side).
#>
[CmdletBinding()]
param(
    [string]$FfmpegDir = $env:MESHBAY_FFMPEG_DIR,
    [switch]$NoElectronBump,
    [switch]$SkipNodeRuntime
)

$ErrorActionPreference = "Stop"
Set-StrictMode -Version Latest

$WinDir = $PSScriptRoot
$Repo   = (Resolve-Path (Join-Path $WinDir "..\..")).Path
$Client = Join-Path $Repo "packages\meshbay-client"

function Step($msg) { Write-Host "==> $msg" -ForegroundColor Cyan }

# --- 1. Node -------------------------------------------------------------
if (-not (Get-Command node -ErrorAction SilentlyContinue)) {
    throw "Node.js not found. Install Node 22 or newer from nodejs.org."
}
$nodeMajor = [int](& node -e "process.stdout.write(String(process.versions.node.split('.')[0]))")
if ($nodeMajor -lt 22) { throw "Node $nodeMajor is too old -- need 22 or newer for Electron" }
Step "Node $(& node --version)"

Push-Location $Client
try {
    # --- 2. deps ------------------------------------------------------
    Step "npm ci"
    & npm ci --ignore-scripts
    if ($LASTEXITCODE -ne 0) { throw "npm ci failed" }

    # --- 3. Electron: build against the latest release --------------
    # Writes package.json + package-lock.json, so the build leaves the repo
    # dirty on purpose -- commit the new pin.
    if (-not $NoElectronBump) {
        Step "checking for a newer Electron"
        $bumped = & node (Join-Path $WinDir "bump-electron.mjs")
        if ($LASTEXITCODE -ne 0) { throw "electron bump failed" }
        if ($bumped) {
            Write-Host "    Electron -> $bumped  (package.json + lock updated, commit them)" -ForegroundColor Yellow
        } else {
            Write-Host "    Electron is already current"
        }
    }

    Step "downloading Electron's Chromium"
    & npm approve-scripts electron 2>$null
    & node node_modules/electron/install.js

    # --- 4. UI -----------------------------------------------------
    Step "npm run sync-ui"
    & npm run sync-ui
    if ($LASTEXITCODE -ne 0) { throw "sync-ui failed" }

    # --- 5. node runtime ---------------------------------------
    $rtExe = Join-Path $Client "node-runtime\meshbay-node.exe"
    if ($SkipNodeRuntime -and (Test-Path $rtExe)) {
        Step "reusing existing node-runtime/"
    } else {
        Step "building the bundled node (PyInstaller)"
        $rtArgs = @{}
        if ($FfmpegDir) { $rtArgs["FfmpegDir"] = $FfmpegDir }
        & (Join-Path $WinDir "build-node-runtime.ps1") @rtArgs
        if ($LASTEXITCODE -ne 0) { throw "build-node-runtime.ps1 failed" }
    }

    # --- 6. installer ---------------------------------------
    Step "electron-builder --win nsis"
    & npx electron-builder --win nsis
    if ($LASTEXITCODE -ne 0) { throw "electron-builder failed" }
}
finally {
    Pop-Location
}

$setup = Get-ChildItem (Join-Path $Client "dist") -Filter "*Setup*.exe" -ErrorAction SilentlyContinue |
    Sort-Object LastWriteTime | Select-Object -Last 1
Write-Host ""
if ($setup) {
    Write-Host "OK  installer: $($setup.FullName)" -ForegroundColor Green
    Write-Host ("    ({0:N0} MB)" -f ($setup.Length / 1MB))
}
else {
    Write-Host "!!  no *Setup*.exe found in $Client\dist" -ForegroundColor Red
    exit 1
}