@echo off
setlocal enabledelayedexpansion

rem ──────────────────────────────────────────────────
rem Defaults (override by passing [backend] [build])
rem ──────────────────────────────────────────────────
set BUILD_DIR=builddir
set BACKEND=ninja
set BUILD=debug

rem ──────────────────────────────────────────────────
rem Recognize help flags
rem ──────────────────────────────────────────────────
if /I "%~1"=="-?"     goto usage
if /I "%~1"=="/?"     goto usage
if /I "%~1"=="-h"     goto usage
if /I "%~1"=="--help" goto usage

rem ──────────────────────────────────────────────────
rem Parse positional arguments
rem ──────────────────────────────────────────────────
if not "%~1"=="" set BACKEND=%~1
if not "%~2"=="" set BUILD=%~2

rem ──────────────────────────────────────────────────
rem Bootstrap Visual Studio if requested
rem ──────────────────────────────────────────────────
if /I "%BACKEND:~0,2%"=="vs" (
  echo [INFO] Initializing Visual Studio environment for %BACKEND%...
  call "%ProgramFiles(x86)%\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64 >nul 2>&1
  if errorlevel 1 (
    echo [ERROR] Failed to initialize VS environment. Check the vcvarsall.bat path.
    exit /b 1
  )
)

rem ──────────────────────────────────────────────────
rem Configure or reconfigure with Meson
rem ──────────────────────────────────────────────────
if not exist "%BUILD_DIR%" (
  echo [INFO] Creating build directory "%BUILD_DIR%" with backend "%BACKEND%" and build "%BUILD%"...
  meson setup "%BUILD_DIR%" --backend=%BACKEND% --buildtype=%BUILD%
) else (
  echo [INFO] Reconfiguring "%BUILD_DIR%" with backend "%BACKEND%" and build "%BUILD%"...
  meson setup --reconfigure "%BUILD_DIR%" --backend=%BACKEND% --buildtype=%BUILD%
)

if errorlevel 1 (
  echo [ERROR] Meson configuration failed.
  exit /b 1
)

rem ──────────────────────────────────────────────────
rem Compile
rem ──────────────────────────────────────────────────
echo [INFO] Configuration succeeded—starting build...
meson compile -C "%BUILD_DIR%"
if errorlevel 1 (
  echo [ERROR] Build failed.
  exit /b 1
)

echo [SUCCESS] Build completed successfully.
exit /b 0

:usage
echo Usage: %~nx0 [backend] [build]
echo.
echo   backend    ninja       (default) ^| vs2022 ^| vs2019 ^| vs2017
echo   build      debug       (default) ^| debugoptimized ^| release ^| relwithdebinfo
exit /b 0