# NexusOS launcher for Windows (native, no Vite).
#
# Single-process app: the backend on :8000 serves the built web UI itself, so
# this starts only the memory service + backend, then opens the UI as an Edge
# app window. The AI (Ollama) does NOT auto-start - turn it on from the UI's
# Start AI button. Closing the app window stops the services.
#
#   Right-click -> Run with PowerShell   (or:  powershell -File launch_nexus.ps1)

$ErrorActionPreference = "Stop"
$Root = $PSScriptRoot
$Py = Join-Path $Root "Promethean\Scripts\python.exe"
if (-not (Test-Path $Py)) { $Py = "python" }  # fall back to PATH

$Runtime = Join-Path $Root "runtime"
$Logs = Join-Path $Runtime "logs"
New-Item -ItemType Directory -Force -Path $Runtime, $Logs | Out-Null

function Start-Svc($log, $argList) {
    return Start-Process -FilePath $Py -ArgumentList $argList `
        -WorkingDirectory $Root -WindowStyle Hidden -PassThru `
        -RedirectStandardOutput $log -RedirectStandardError "$log.err"
}

Write-Host "Starting NexusOS..." -ForegroundColor Cyan
# Only start a service if its port is free. If it's already listening (a prior
# launch, or started by hand) reuse it instead of spawning a duplicate that
# fails to bind and stalls the readiness wait below.
$memory = $null
if (-not (Get-NetTCPConnection -LocalPort 8001 -State Listen -ErrorAction SilentlyContinue)) {
    $memory = Start-Svc (Join-Path $Runtime "memory.log")  @("-m","uvicorn","synapse.memory.service:app","--host","127.0.0.1","--port","8001")
}
$backend = $null
if (-not (Get-NetTCPConnection -LocalPort 8000 -State Listen -ErrorAction SilentlyContinue)) {
    $backend = Start-Svc (Join-Path $Runtime "backend.log") @("-m","uvicorn","synapse.main:sio_app","--host","127.0.0.1","--port","8000")
}

# Wait for the backend to answer on :8000.
$ok = $false
foreach ($i in 1..30) {
    try {
        Invoke-WebRequest -UseBasicParsing -Uri "http://localhost:8000/status" -TimeoutSec 2 | Out-Null
        $ok = $true; break
    } catch { Start-Sleep -Seconds 1 }
}
if (-not $ok) {
    Write-Host "Backend did not come up - check runtime\backend.log" -ForegroundColor Red
}

# Open the UI in a native window (pywebview / WebView2) - no browser, no Edge
# profile cold-start. bin\nexus_window.py blocks until the window is closed and
# falls back to the default browser if WebView2 is unavailable.
$app = Start-Process -FilePath $Py -ArgumentList @((Join-Path $Root "bin\nexus_window.py")) `
    -WorkingDirectory $Root -PassThru

Write-Host "NexusOS is running at http://localhost:8000  (AI is off - start it in the UI)" -ForegroundColor Green
# Block until the app window (or a service we started) exits, so this process
# stays alive to hold and later stop the services. No blind Read-Host: the
# shortcut runs hidden, where a prompt no one can answer would hang forever.
if ($app) { $app.WaitForExit() }
elseif ($backend) { $backend.WaitForExit() }
elseif ($memory) { $memory.WaitForExit() }

# Shut the services down.
Write-Host "Stopping NexusOS..." -ForegroundColor Cyan
foreach ($p in @($backend, $memory)) {
    if ($p -and -not $p.HasExited) { Stop-Process -Id $p.Id -Force -ErrorAction SilentlyContinue }
}
