[CmdletBinding()]
param()

$ErrorActionPreference = "Stop"
$runtimeRoot = (Resolve-Path (Join-Path $PSScriptRoot "..\.local\llama.cpp")).Path
$pidPath = Join-Path $runtimeRoot "server.pid"
if (-not (Test-Path $pidPath)) {
    Write-Output "No recorded llama.cpp server process."
    exit 0
}

$recordedPid = Get-Content $pidPath -Raw
if ([string]::IsNullOrWhiteSpace($recordedPid)) {
    Write-Output "No recorded llama.cpp server process."
    exit 0
}
$recordedPid = $recordedPid.Trim()
$serverPid = [int]$recordedPid
$process = Get-Process -Id $serverPid -ErrorAction SilentlyContinue
if (-not $process) {
    Set-Content -LiteralPath $pidPath -Value "" -Encoding ASCII -NoNewline
    Write-Output "Removed stale llama.cpp PID file."
    exit 0
}
$expectedRoot = (Resolve-Path $runtimeRoot).Path
$processPath = $process.Path
if (
    $process.ProcessName -ne "llama-server" -or
    -not $processPath.StartsWith($expectedRoot, [System.StringComparison]::OrdinalIgnoreCase)
) {
    throw "PID $serverPid is not the expected repository-owned llama-server process; refusing to stop it."
}
Stop-Process -Id $serverPid -Force
Wait-Process -Id $serverPid -Timeout 15 -ErrorAction SilentlyContinue
Set-Content -LiteralPath $pidPath -Value "" -Encoding ASCII -NoNewline
Write-Output "Stopped llama-server PID $serverPid."