# PowerShell Script to Reset Tailscale on Windows
# Works even if Tailscale service is not present

function Get-TailscalePath {
    $pathsToCheck = @(
        "$env:ProgramFiles\Tailscale\tailscale.exe",
        "$env:ProgramFiles(x86)\Tailscale\tailscale.exe",
        "$env:LOCALAPPDATA\Tailscale\tailscale.exe"
    )
    foreach ($path in $pathsToCheck) {
        if (Test-Path $path) {
            return $path
        }
    }
    return $null
}

$tailscalePath = Get-TailscalePath

if (-not $tailscalePath) {
    Write-Warning "Tailscale CLI not found on this system. Skipping CLI commands..."
} else {
    Write-Host "Found Tailscale CLI at $tailscalePath"
    & "$tailscalePath" logout
}

# Stop service if exists
$service = Get-Service -Name "Tailscale" -ErrorAction SilentlyContinue
if ($service) {
    Write-Host "Stopping Tailscale service..."
    Stop-Service Tailscale -Force
} else {
    Write-Warning "Tailscale service not found, skipping stop."
}

# Remove state file if present
$statePath = "C:\ProgramData\Tailscale\tailscaled.state"
if (Test-Path $statePath) {
    Remove-Item $statePath -Force
    Write-Host "Removed tailscaled.state"
}

# Remove appdata folders
$localApp = "$env:LOCALAPPDATA\Tailscale"
$roamingApp = "$env:APPDATA\Tailscale"

foreach ($folder in @($localApp, $roamingApp)) {
    if (Test-Path $folder) {
        Remove-Item $folder -Recurse -Force
        Write-Host "Removed folder: $folder"
    }
}

# Restart service if exists
if ($service) {
    Start-Service Tailscale
    Write-Host "Restarted Tailscale service"
}

# Show prefs if CLI was found
if ($tailscalePath) {
    & "$tailscalePath" debug prefs
}

Write-Host "`n✅ Tailscale reset complete. If you're using Headscale, run:"
Write-Host "`ttailscale up --login-server http://headscale.estudiogroup.com:8080"