@echo off
setlocal enabledelayedexpansion
cd /D "%~dp0"

:: --- Usage Notes -------------------------------------------------------------
::
:: Central build script for Juliet modular architecture.
:: Takes alphanumeric arguments to control target, compiler, and build configuration.
::
:: Examples:
::   new_build
::   new_build appbin
::   new_build appbin clang
::   new_build appbin release
::   new_build appbin msvc debug asan
::   new_build clean
::

:: --- Unpack Arguments -------------------------------------------------------
for %%a in (%*) do set "%%~a=1"

if "%clean%"=="1" (
  if exist build (
    echo [clean] Removing build directory...
    rmdir /s /q build
  )
  exit /b 0
)

:: --- Compiler Selection & Auto-Detection -------------------------------------
if not "%msvc%"=="1" if not "%clang%"=="1" set clang=1

if "%msvc%"=="1" (
  where cl.exe >nul 2>nul
  if errorlevel 1 (
    if exist "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" (
      call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64 >nul 2>&1
    )
  )
)

if not "%release%"=="1" set debug=1
if "%debug%"=="1"   set release=0 && echo [debug mode]
if "%release%"=="1" set debug=0 && echo [release mode]
if "%clang%"=="1"   set msvc=0 && echo [clang compile]
if "%msvc%"=="1"    set clang=0 && echo [msvc compile]

:: Default target: appbin
if "%~1"==""                     echo [default mode, assuming `appbin` build] && set appbin=1
if "%~1"=="release" if "%~2"=="" echo [default mode, assuming `appbin` build] && set appbin=1
if "%~1"=="debug"   if "%~2"=="" echo [default mode, assuming `appbin` build] && set appbin=1
if "%~1"=="clang"   if "%~2"=="" echo [default mode, assuming `appbin` build] && set appbin=1
if "%~1"=="msvc"    if "%~2"=="" echo [default mode, assuming `appbin` build] && set appbin=1

:: --- Unpack Command Line Build Arguments ------------------------------------
set auto_compile_flags=
if "%asan%"=="1"  set auto_compile_flags=%auto_compile_flags% -fsanitize=address && echo [asan enabled]
if "%ubsan%"=="1" set auto_compile_flags=%auto_compile_flags% -fsanitize=undefined && echo [ubsan enabled]

:: --- Natvis Options ---------------------------------------------------------
set natvis_flags=
if exist "%~dp0Natvis\Juliet.natvis" (
  if "%msvc%"=="1"  set natvis_flags=%natvis_flags% /NATVIS:"%~dp0Natvis\Juliet.natvis"
  if "%clang%"=="1" set natvis_flags=%natvis_flags% -Xlinker /NATVIS:"%~dp0Natvis\Juliet.natvis"
)
if exist "%~dp0Natvis\String.natvis" (
  if "%msvc%"=="1"  set natvis_flags=%natvis_flags% /NATVIS:"%~dp0Natvis\String.natvis"
  if "%clang%"=="1" set natvis_flags=%natvis_flags% -Xlinker /NATVIS:"%~dp0Natvis\String.natvis"
)

:: --- Compile/Link Line Definitions ------------------------------------------
set cl_common=     /I..\Juliet\ /nologo /FC /Z7 /Zc:preprocessor /utf-8
set cl_debug=      call cl /Od /Ob1 /DBUILD_DEBUG=1 %cl_common% %auto_compile_flags%
set cl_release=    call cl /O2 /DBUILD_DEBUG=0 %cl_common% %auto_compile_flags%
set cl_link=       /link /MANIFEST:EMBED /INCREMENTAL:NO /pdbaltpath:%%%%_PDB%%%% /DEBUG %natvis_flags% /opt:ref /opt:icf
set cl_out=        /out:
set cl_obj_out=    /Fo:
set cl_linker=

set clang_common=  -mcx16 -I..\Juliet\ -fdiagnostics-absolute-paths -Wall -Wno-unknown-warning-option -Wno-missing-braces -Wno-unused-function -Wno-unused-parameter -Wno-writable-strings -Wno-missing-field-initializers -Wno-unused-value -Wno-unused-variable -Wno-unused-local-typedef -Wno-deprecated-register -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-single-bit-bitfield-constant-conversion -Wno-compare-distinct-pointer-types -Wno-initializer-overrides -Wno-incompatible-pointer-types-discards-qualifiers -Xclang -flto-visibility-public-std -D_USE_MATH_DEFINES -Dstrdup=_strdup -Dgnu_printf=printf -ferror-limit=10000
set clang_debug=   call clang -g -O0 -DBUILD_DEBUG=1 %clang_common% %auto_compile_flags%
set clang_release= call clang -g -O2 -DBUILD_DEBUG=0 %clang_common% %auto_compile_flags%
set clang_link=    -fuse-ld=lld -Xlinker /MANIFEST:EMBED -Xlinker /pdbaltpath:%%%%_PDB%%%% -Xlinker /DEBUG %natvis_flags% -Xlinker /opt:ref -Xlinker /opt:noicf
set clang_out=     -o
set clang_obj_out= -o
set clang_linker=  -Xlinker

:: --- Per-Build Settings -----------------------------------------------------
if "%msvc%"=="1"    set linker=%cl_linker%
if "%clang%"=="1"   set linker=%clang_linker%
if "%msvc%"=="1"    set only_compile=/c
if "%clang%"=="1"   set only_compile=-c
if "%msvc%"=="1"    set link_dll=/link /DLL
if "%clang%"=="1"   set link_dll=-Xlinker -DLL

:: --- Choose Compile/Link Lines ----------------------------------------------
if "%msvc%"=="1"      set compile_debug=%cl_debug%
if "%msvc%"=="1"      set compile_release=%cl_release%
if "%msvc%"=="1"      set compile_link=%cl_link%
if "%msvc%"=="1"      set out=%cl_out%
if "%msvc%"=="1"      set obj_out=%cl_obj_out%
if "%clang%"=="1"     set compile_debug=%clang_debug%
if "%clang%"=="1"     set compile_release=%clang_release%
if "%clang%"=="1"     set compile_link=%clang_link%
if "%clang%"=="1"     set out=%clang_out%
if "%clang%"=="1"     set obj_out=%clang_obj_out%
if "%debug%"=="1"     set compile=%compile_debug%
if "%release%"=="1"   set compile=%compile_release%

:: --- Prep Directories -------------------------------------------------------
if not exist build mkdir build

:: --- Build Targets (@build_targets) -----------------------------------------
pushd build
if "%appbin%"=="1" set didbuild=1 && %compile% ..\Juliet\appbin\appbin_main.c %compile_link% %out%appbin.exe || exit /b 1
popd

:: --- Warn On No Builds ------------------------------------------------------
if "%didbuild%"=="" (
  echo [WARNING] no valid build target specified; must use build target names like `new_build appbin`.
  exit /b 1
)

echo [build success]
exit /b 0