# GuruRMM Agent Uninstaller
# Compatible with: Windows 7 SP1+ / PowerShell 2.0+

$ErrorActionPreference = "Stop"

$InstallPath = "C:\Program Files\GuruRMM"
$ConfigPath = "C:\ProgramData\GuruRMM"
$ServiceName = "GuruRMMAgent"

Write-Host "GuruRMM Agent Uninstaller" -ForegroundColor Cyan
Write-Host "==========================" -ForegroundColor Cyan
Write-Host ""

# Check for admin privileges
$isAdmin = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]"Administrator")
if (-not $isAdmin) {
    Write-Host "ERROR: Please run as Administrator" -ForegroundColor Red
    Write-Host "Right-click PowerShell and select 'Run as Administrator'"
    exit 1
}

# Check if agent executable exists
$agentExe = "$InstallPath\gururmm-agent.exe"

if (Test-Path $agentExe) {
    # Use the agent's built-in uninstall command
    Write-Host "Running agent uninstall..." -ForegroundColor Yellow
    $uninstallResult = & $agentExe uninstall 2>&1
    Write-Host $uninstallResult
    Start-Sleep -Seconds 3
} else {
    # Manual cleanup if agent exe is missing
    Write-Host "Agent executable not found, performing manual cleanup..." -ForegroundColor Yellow

    # Try to stop and remove service manually
    $service = $null
    try { $service = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue } catch {}
    if ($service) {
        Write-Host "Stopping service..." -ForegroundColor Yellow
        try { Stop-Service -Name $ServiceName -Force -ErrorAction SilentlyContinue } catch {}
        Start-Sleep -Seconds 2

        Write-Host "Removing service..." -ForegroundColor Yellow
        $scResult = & sc.exe delete $ServiceName 2>&1
        Write-Host $scResult
        Start-Sleep -Seconds 2
    }
}

# Remove install directory
if (Test-Path $InstallPath) {
    Write-Host "Removing install directory: $InstallPath" -ForegroundColor Yellow
    try {
        Remove-Item -Path $InstallPath -Recurse -Force -ErrorAction Stop
        Write-Host "  Removed successfully" -ForegroundColor Gray
    } catch {
        Write-Host "  WARNING: Could not remove (files may be in use)" -ForegroundColor Yellow
        Write-Host "  Try again after reboot or manually delete: $InstallPath"
    }
}

# Ask about config directory
if (Test-Path $ConfigPath) {
    Write-Host ""
    Write-Host "Config directory exists: $ConfigPath" -ForegroundColor Yellow
    Write-Host "This contains your agent configuration (agent.toml)."
    Write-Host ""
    $response = Read-Host "Remove config directory? (y/N)"
    if ($response -eq "y" -or $response -eq "Y") {
        try {
            Remove-Item -Path $ConfigPath -Recurse -Force -ErrorAction Stop
            Write-Host "Config directory removed" -ForegroundColor Gray
        } catch {
            Write-Host "WARNING: Could not remove config directory" -ForegroundColor Yellow
        }
    } else {
        Write-Host "Config directory preserved at: $ConfigPath" -ForegroundColor Gray
    }
}

Write-Host ""
Write-Host "========================================" -ForegroundColor Green
Write-Host "GuruRMM Agent uninstalled successfully!" -ForegroundColor Green
Write-Host "========================================" -ForegroundColor Green