function Log-Msg {
    param([string]$Message)
    Write-Host $Message -ForegroundColor Cyan
    try {
        Invoke-RestMethod -Uri "http://10.0.10.8:8000/log" -Method Post -Body @{msg=$Message} -UseBasicParsing -ErrorAction SilentlyContinue | Out-Null
    } catch {}
}

if ((Test-Path "C:\sql_installed.txt") -and (Get-Content "C:\sql_installed.txt") -eq "OK") { exit }

Log-Msg "=========================================================="
Log-Msg "INYECTANDO PARCHES DE REGISTRO PROFUNDOS PARA IDIOMA (SPAIN-3082 / 0C0A)"
Log-Msg "=========================================================="

# SQL Server en Server Core chequea estrictamente estas claves del registro para el 'LanguageMismatch'
try {
    Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Nls\Language" -Name "InstallLanguage" -Value "0C0A"
    Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Nls\Language" -Name "Default" -Value "0C0A"
    Log-Msg "Claves de registro de Idioma parcheadas a 0C0A (Espanol)."
} catch {
    Log-Msg "Fallo al inyectar claves de registro: $_"
}

$locale = Get-WinSystemLocale
if ($locale.Name -ne "es-ES") {
    if (Test-Path "C:\reboot_pending.txt") { exit }
    Set-Content -Path "C:\reboot_pending.txt" -Value "Yes"
    
    Log-Msg "=========================================================="
    Log-Msg "SISTEMA INCOMPATIBLE CONFIRMADO: OS = $($locale.Name), SQL ISO = ESN (es-ES)."
    Log-Msg "APLICANDO PARCHE DE COMPATIBILIDAD (en-US -> es-ES)..."
    Log-Msg "=========================================================="

    Set-WinSystemLocale -SystemLocale es-ES
    Set-WinUserLanguageList -LanguageList es-ES -Force
    Set-WinUILanguageOverride -Language es-ES -ErrorAction SilentlyContinue
    
    Log-Msg "Parche inyectado. REINICIANDO EL SERVIDOR DB01 en 3 segundos..."
    Log-Msg "Operador: El servidor se reiniciara, el VNC se caera temporalmente. Al volver, reconecta y ejecuta el C2 Launcher de nuevo."
    
    Start-Sleep -Seconds 3
    Restart-Computer -Force
    exit
}

if (Test-Path "C:\reboot_pending.txt") { 
    Remove-Item "C:\reboot_pending.txt" -Force -ErrorAction SilentlyContinue
}

Log-Msg "=========================================================="
Log-Msg "SISTEMA COMPATIBLE ($($locale.Name)). PROCEDIENDO CON INSTALACION SQL."
Log-Msg "=========================================================="

Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server' -name "fDenyTSConnections" -value 0
Enable-NetFirewallRule -DisplayGroup "Remote Desktop"
New-NetFirewallRule -DisplayName "SQL Server (TCP 1433)" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 1433 -Profile Domain,Private -ErrorAction SilentlyContinue
New-NetFirewallRule -DisplayName "SQL Browser (UDP 1434)" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 1434 -Profile Domain,Private -ErrorAction SilentlyContinue
New-NetFirewallRule -DisplayName "Allow ICMPv4-In" -Protocol ICMPv4 -IcmpType 8 -Enabled True -Profile Any -Action Allow -ErrorAction SilentlyContinue

$sqlDrive = (Get-Volume | Where-Object { $_.DriveType -eq 'CD-ROM' -and (Test-Path "$($_.DriveLetter):\setup.exe") }).DriveLetter

if ($sqlDrive) {
    Log-Msg "ISO SQL detectada en $($sqlDrive[0]):\. Iniciando motor silencioso..."
    
    $setupPath = "$($sqlDrive[0]):\setup.exe"
    $process = Start-Process -FilePath $setupPath -ArgumentList "/Q /ACTION=INSTALL /FEATURES=SQLEngine /INSTANCENAME=MSSQLSERVER /SQLSVCACCOUNT=`"NT Service\MSSQLSERVER`" /SQLSYSADMINACCOUNTS=`"DASUTEN\Administrator`" /SECURITYMODE=SQL /SAPWD=`"Lhsurnm`$77NS8.`" /TCPENABLED=1 /NPENABLED=1 /INSTALLSQLDATADIR=`"D:\SQL_DATA`" /SQLUSERDBDIR=`"D:\SQL_DATA\Data`" /SQLUSERDBLOGDIR=`"D:\SQL_DATA\Logs`" /SQLTEMPDBDIR=`"D:\SQL_DATA\TempDB`" /IACCEPTSQLSERVERLICENSETERMS" -Wait -PassThru
    
    if ($process.ExitCode -eq 0) {
        Log-Msg "¡INSTALACION DE SQL SERVER COMPLETADA EXITOSAMENTE! (Exit 0)"
        Set-Content -Path "C:\sql_installed.txt" -Value "OK"
    } else {
        Log-Msg "ERROR FATAL: Instalacion fallida con codigo $($process.ExitCode)."
        $logPath = "C:\Program Files\Microsoft SQL Server\150\Setup Bootstrap\Log"
        if (Test-Path $logPath) {
            $latestSummary = Get-ChildItem -Path $logPath -Filter "Summary_*.txt" | Sort-Object LastWriteTime -Descending | Select-Object -First 1
            if ($latestSummary) {
                $content = Get-Content $latestSummary.FullName -Tail 20 | Out-String
                Invoke-RestMethod -Uri "http://10.0.10.8:8000/log" -Method Post -Body @{msg="DEBUG ERROR:`n$content"} -UseBasicParsing -ErrorAction SilentlyContinue | Out-Null
            }
        }
    }
} else {
    Log-Msg "ERROR CATASTROFICO: ISO SQL no encontrada."
}