$Repo = "fosrl/newt"
$InstallDir = "C:\Program Files\me-msp-newt"
$ServiceName = "MAIEREDV-Managed-Site-Client"
$Symlink = "$InstallDir\newt_latest.exe"

# 1. Latest Version holen
function Get-LatestVersion {
    $url = "https://api.github.com/repos/$Repo/releases/latest"
    $json = Invoke-RestMethod -Uri $url
    return $json.tag_name.TrimStart('v')
}

# 2. Download & Symlink (Copy)
function Install-Newt {
    param($Version)
    $Arch = if ([Environment]::Is64BitOperatingSystem) { "newt_windows_amd64.exe" } else { "newt_windows_386.exe" }
    $Url = "https://github.com/$Repo/releases/download/v$Version/$Arch"
    $Target = "$InstallDir\newt_$Version.exe"

    if (!(Test-Path $InstallDir)) { New-Item -ItemType Directory -Path $InstallDir }

    Write-Host "⬇️ Downloading $Url..." -ForegroundColor Cyan
    Invoke-WebRequest -Uri $Url -OutFile "$Target"
    
    # "Symlink" unter Windows ist zickig, wir kopieren einfach zur 'latest'
    Copy-Item -Path $Target -Destination $Symlink -Force
    Write-Host "✅ Installed version $Version" -ForegroundColor Green
}

# 3. Dienst nativ erstellen
function Setup-Service {
    $PangolinID = Read-Host "ID"
    $Secret = Read-Host "Secret" -AsSecureString
    $Endpoint = Read-Host "Endpoint"
    
    $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($Secret)
    $PlainSecret = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)

    $Args = "--id $PangolinID --secret $PlainSecret --endpoint $Endpoint"

    # Prüfen ob Dienst existiert, sonst erstellen
    if (Get-Service $ServiceName -ErrorAction SilentlyContinue) {
        Stop-Service $ServiceName
        $service = Get-CimInstance Win32_Service -Filter "Name='$ServiceName'"
        $service.Change($null, $null, $null, $null, $null, "$Symlink $Args")
    } else {
        New-Service -Name $ServiceName `
                    -BinaryPathName "$Symlink $Args" `
                    -DisplayName "MAIEREDV Managed Site Client" `
                    -StartupType Automatic
    }
    Start-Service $ServiceName
}

# 4. Update Task (statt systemd timer)
function Setup-UpdateTask {
    $TaskName = "Newt-Updater"
    $Action = New-ScheduledTaskAction -Execute "PowerShell.exe" `
        -Argument "-NoProfile -WindowStyle Hidden -Command ""& {Invoke-WebRequest -Uri 'DEINE_URL_ZUM_PS1' | PowerShell}"""
    $Trigger = New-ScheduledTaskTrigger -Daily -At 3am
    
    Register-ScheduledTask -Action $Action -Trigger $Trigger -TaskName $TaskName -User "SYSTEM" -Force
    Write-Host "✅ Daily update task created." -ForegroundColor Green
}

# Main Logic (vereinfacht)
$Latest = Get-LatestVersion
Install-Newt $Latest
Setup-Service
Setup-UpdateTask