#!/bin/bash
set -eu

for arg in "$@"; do declare $arg="1"; done

if [ ! -v release ]; then debug=1; fi
if [ ! -v clang   ]; then gcc=1;   fi

if [ -v release ]; then 
	build_mode="-02"
	mode_flags="-DBUILD_RELEASE"
	echo "[Release Mode]"
fi
if [ -v debug   ]; 
	build_mode="-g -O0"
	mode_flags="-DBUILD_DEBUG"
	then echo "[Debug Mode]"
fi

script_dir="$(dirname -- "${BASH_SOURCE[0]}" )"
cd $script_dir

mkdir -p build
mkdir -p include

# SDL
if ! [ -f "build/libSDL3.a" ]; then
	cmake -S SDL -B SDL/build -DSDL_STATIC=ON -DSDL_SHARED=OFF

	cd SDL/build
	make
	cd ../..

	cp SDL/build/libSDL3.a build
	cp -r SDL/include/SDL3 include
fi

if [ -v gcc ]; then 
	if ! [ -x "$(command -v g++)" ]; then
		echo "Unable to find gcc compiler, try again with the clang flag or install gcc."
		exit 1
	fi

	compiler_flags="-fzero-init-padding-bits=unions"
	compiler="g++"
elif [ -v clang ]; then
	if ! [ -x "$(command -v clang++)" ]; then
		echo "Unable to find clang compiler, try again with the gcc flag or install clang"
		exit 1
	fi

	compiler_flags=""
	compiler="clang++"
fi

if   [ -x "$(command -v mold)" ]; then
	linker="mold";
elif [ -x "$(command -v lld)" ]; then
	linker="lld";
elif [ -x "$(command -v ld)" ]; then
	linker="ld"
else
	echo "Unable to find a linker, please install mold, lld or ld"
	exit 1
fi

src="main.cpp"
out="build/Renderer"
flags="-std=c++23 -D_USE_MATH_DEFINES ${build_mode} ${compiler_flags} ${mode_flags} -Iexternal/include -fuse-ld=${linker} -Wno-pointer-arith -o${out}"
linker_flags="-lGL -lpthread -Lbuild -l:libSDL3.a"

$compiler $src $linker_flags $flags