@echo off
REM ===========================================================================
REM FCS Glass - noninteractive build driver (ASSUMPTIONS D-5, HC3).
REM
REM Usage:  scripts\build.cmd [Release^|RelWithDebInfo^|Debug] [run]
REM         scripts\build.cmd clean
REM
REM Mirrors the demo's proven pattern: the PATH cmake/ninja on this machine are
REM MinGW builds, so we deliberately ignore them and drive the Visual Studio
REM toolchain through vcvars64.bat with an explicit generator and arch.
REM Never prompts, never uses -Confirm (the HC3 rule the C# version needed).
REM ===========================================================================
setlocal EnableDelayedExpansion

set "ROOT=%~dp0.."
set "CFG=%~1"
if "%CFG%"=="" set "CFG=RelWithDebInfo"
if /I "%CFG%"=="clean" goto :clean

set "DO_RUN=%~2"
if /I "%DO_RUN%"=="run" (set "DO_RUN=1") else (set "DO_RUN=0")

REM --- locate MSVC via vswhere ------------------------------------------------
set "VSWHERE=%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe"
if not exist "%VSWHERE%" (
  echo [build] FATAL: vswhere.exe not found. Install Visual Studio 2022 Build Tools.
  exit /b 1
)

for /f "usebackq tokens=*" %%I in (`"%VSWHERE%" -latest -products * ^
  -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 ^
  -property installationPath`) do set "VSPATH=%%I"

if not defined VSPATH (
  echo [build] FATAL: no Visual Studio installation with the C++ x64 tools.
  exit /b 1
)
echo [build] MSVC root: !VSPATH!

set "VCVARS=!VSPATH!\VC\Auxiliary\Build\vcvars64.bat"
if not exist "!VCVARS!" (
  echo [build] FATAL: vcvars64.bat not found under "!VSPATH!".
  exit /b 1
)

REM --- prefer the VS-bundled cmake, else fall back to PATH --------------------
set "VSCMAKE=!VSPATH!\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe"
if exist "!VSCMAKE!" (set "CMAKE=!VSCMAKE!") else (set "CMAKE=cmake")

if exist "%ROOT%\build" rmdir /S /Q "%ROOT%\build"

call "!VCVARS!" >nul
if errorlevel 1 (
  echo [build] FATAL: vcvars64.bat failed.
  exit /b 1
)

echo [build] configuring (%CFG%)...
"%CMAKE%" -S "%ROOT%" -B "%ROOT%\build" ^
  -G "Visual Studio 17 2022" -A x64 ^
  -DCMAKE_BUILD_TYPE=%CFG%
if errorlevel 1 (
  echo [build] FATAL: configure failed.
  exit /b 1
)

echo [build] compiling...
"%CMAKE%" --build "%ROOT%\build" --config %CFG% --parallel
if errorlevel 1 (
  echo [build] FATAL: compile failed.
  exit /b 1
)

echo.
echo [build] artifacts:
if exist "%ROOT%\build\bin\fcs_glass.exe"     (echo   bin\fcs_glass.exe)
if exist "%ROOT%\build\bin\fcs_selftest.exe"  (echo   bin\fcs_selftest.exe)
REM BUG-27: the Visual Studio generator appends the configuration directory
REM (build\bin\RelWithDebInfo\), while a Ninja generator does not (build\bin\).
REM Checking only the flat path reported "no artifacts" for a build that had in
REM fact succeeded - which is how a green build looked like a failed one.
if exist "%ROOT%\build\bin\%CFG%\fcs_glass.exe"     (echo   bin\%CFG%\fcs_glass.exe)
if exist "%ROOT%\build\bin\%CFG%\fcs_selftest.exe"  (echo   bin\%CFG%\fcs_selftest.exe)
echo.

if "%DO_RUN%"=="1" (
  REM BUG-27: the parentheses around M0a MUST be escaped. Inside a parenthesized
  REM if-block an unescaped ')' closes the block, so cmd died with
  REM "... was unexpected at this time." and the script exited 1 on EVERY run,
  REM whether or not 'run' was passed - the whole block is parsed before the
  REM condition is evaluated.
  echo [build] launching fcs_selftest ^(M0a probe^)...
  "%ROOT%\build\bin\%CFG%\fcs_selftest.exe"
  exit /b %errorlevel%
)
exit /b 0

:clean
if exist "%ROOT%\build" rmdir /S /Q "%ROOT%\build"
echo [build] removed build\
exit /b 0