@echo off
setlocal
title Install NSIS

fltmc >nul 2>&1
if errorlevel 1 (
    echo Please right-click this file and choose "Run as administrator".
    pause
    exit /b 1
)

where winget.exe >nul 2>&1
if errorlevel 1 (
    echo winget was not found.
    pause
    exit /b 1
)

echo Installing NSIS with winget...
winget install --id NSIS.NSIS --exact --source winget ^
    --accept-source-agreements --accept-package-agreements
set "RC=%ERRORLEVEL%"

if "%RC%"=="0" (
    echo Done. Open a new terminal to pick up the updated PATH.
) else if "%RC%"=="3010" (
    echo Done. A reboot is required to finish the installation.
) else (
    echo winget exited with code %RC%.
)
pause
exit /b %RC%