$ErrorActionPreference = 'Stop'
$Root = $PSScriptRoot
$Baseline = Join-Path $Root 'rollback\llama-bootstrap-baseline'
$Listener = Get-NetTCPConnection -State Listen -LocalPort 8091 -ErrorAction SilentlyContinue | Select-Object -First 1
if ($Listener) {
    $Owner = Get-CimInstance Win32_Process -Filter "ProcessId=$($Listener.OwningProcess)"
    if ($Owner.Name -eq 'llama-server.exe') {
        Stop-Process -Id $Listener.OwningProcess -Force
        Wait-Process -Id $Listener.OwningProcess -Timeout 30 -ErrorAction SilentlyContinue
    }
}
$Disabled = Join-Path $Root ('rollback\llama-bootstrap-disabled-' + (Get-Date -Format 'yyyyMMdd-HHmmss'))
New-Item -ItemType Directory -Path $Disabled -Force | Out-Null
$RuntimeDirs = @(Get-ChildItem -LiteralPath $Root -Directory -Filter 'llama-runtime*' -ErrorAction SilentlyContinue)
foreach ($RuntimeDir in $RuntimeDirs) {
    $Resolved = [IO.Path]::GetFullPath($RuntimeDir.FullName)
    if (-not $Resolved.StartsWith(([IO.Path]::GetFullPath($Root) + [IO.Path]::DirectorySeparatorChar), [StringComparison]::OrdinalIgnoreCase)) {
        throw "Unsafe rollback target: $Resolved"
    }
    Move-Item -LiteralPath $Resolved -Destination $Disabled -Force
}
foreach ($Name in @('llama-model','llama-runtime-state.json','llama-service-state.json','llama-server.stdout.log','llama-server.stderr.log','Start-Llama-Service.bat','Stop-Llama-Service.bat','llama-bootstrap.ps1')) {
    $Target = Join-Path $Root $Name
    if (Test-Path -LiteralPath $Target) {
        $Resolved = [IO.Path]::GetFullPath($Target)
        if (-not $Resolved.StartsWith(([IO.Path]::GetFullPath($Root) + [IO.Path]::DirectorySeparatorChar), [StringComparison]::OrdinalIgnoreCase)) {
            throw "Unsafe rollback target: $Resolved"
        }
        Move-Item -LiteralPath $Target -Destination $Disabled -Force
    }
}
foreach ($Name in @('package.json','README.md')) {
    Copy-Item -LiteralPath (Join-Path $Baseline $Name) -Destination (Join-Path $Root $Name) -Force
}
Write-Output 'package llama bootstrap rolled back to the verified native-only baseline'