#!/bin/bash
set -eu

for arg in "$@"; do declare $arg="1"; done
if [ ! -v clang ]; 												then gcc=1; fi
if [ ! -v release ]; 											then debug=1; fi
if [ -v debug ]; 													then echo "[debug mode]"; fi
if [ -v release ];												then echo "[release mode]"; fi
if [ -v gcc ]; 														then compiler="${CC:-gcc}"; cpp_compiler="g++"; echo "[gcc compiler]"; fi
if [ -v clang ]; 													then compiler="${CC:-clang}"; cpp_compiler="clang++"; echo "[clang compiler]"; fi
if [ -v vulkan ]; 												then render_flag="-DSTG_VULKAN_RENDERER"; echo "[vulkan renderer]"; fi
if [ -v opengl ] && [ ! -v render_flag ];	then render_flag="-DSTG_OPENGL_RENDERER"; echo "[opengl renderer]"; fi
if [ -v webgl ] && [ ! -v render_flag ];	then render_flag="-DSTG_WEBGL_RENDERER"; echo "[webgl renderer]"; fi
if [ -v dx11 ] && [ ! -v render_flag ]; 	then render_flag="-DSTG_DX11_RENDERER"; echo "[dx11 renderer]"; fi
if [ ! -v render_flag ];									then render_flag="-DSTG_VULKAN_RENDERER"; echo "[default renderer - vulkan]"; fi

# for command line build args
auto_compile_flags="${render_flag}"

# source files
source_files="../src/main.c"

# includes
include_flags="-I../src/ -I../external/ -L."

# executable name
out_name="here"

# vma flags
vma_ld="ld -static vma.o `g++ -print-file-name=libstdc++.a` -o vmastdc++.o"
vma_source_files="../external/vma/vma.cpp"
vma_compile_flags="-std=c++20 -I../external/vma"
vma_out="-c -o"
vma_obj="vma.o"

clang_common="${include_flags} -g -Xclang -flto-visibility-public-std -Wno-unknown-warning-option -fdiagnostics-absolute-paths -Wall -Wno-missing-braces -Wno-unused-function -Wno-writable-strings -Wno-unused-value -Wno-unused-variable -Wno-unused-local-typedef -Wno-deprecated-register -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-single-bit-bitfield-constant-conversion -Wno-compare-distinct-pointer-types -Wno-initializer-overrides -Wno-incompatible-pointer-types-discards-qualifiers -Wno-for-loop-analysis -DVMA_STATIC_VULKAN_FUNCTIONS=0"
clang_debug="$compiler -g -O0 -DBUILD_DEBUG=1 ${clang_common} ${auto_compile_flags}"
clang_release="$compiler -g -O2 -DBUILD_DEBUG=0 ${clang_common} ${auto_compile_flags}"
clang_link="-lpthread -lm -lrt -ldl -l:libvma.a"
clang_out="-o"

gcc_common="${include_flags} -fuse-ld=mold -g -Wno-unknown-warning-option -Wall -Wno-missing-braces -Wno-unused-function -Wno-attributes -Wno-unused-value -Wno-unused-variable -Wno-unused-local-typedef -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-compare-distinct-pointer-types -D_USE_MATH_DEFINES -Dstrdup=_strdup -Dgnu_printf=printf -DVMA_STATIC_VULKAN_FUNCTIONS=0"
gcc_debug="$compiler -g -O0 -DBUILD_DEBUG=1 ${gcc_common} ${auto_compile_flags}"
gcc_release="$compiler -g -O2 -DBUILD_DEBUG=0 ${gcc_common} ${auto_compile_flags}"
gcc_link="-lpthread -lm -lrt -ldl -l:libvma.a"
gcc_out="-o"

link_dll="-fPIC"
link_os_gfx="-lxcb -lvulkan"

if [ -v gcc ]; 			then compile_debug="$gcc_debug"; fi
if [ -v gcc ]; 			then compile_release="$gcc_release"; fi
if [ -v gcc ];			then compile_link="$gcc_link"; fi
if [ -v gcc ]; 			then out="$gcc_out"; fi

if [ -v clang ]; 		then compile_debug="$clang_debug"; fi
if [ -v clang ]; 		then compile_release="$clang_release"; fi
if [ -v clang ]; 		then compile_link="$clang_link"; fi
if [ -v clang ]; 		then out="$clang_out"; fi

if [ -v debug ]; 		then compile="$compile_debug"; fi
if [ -v release ];	then compile="$compile_release"; fi

mkdir -p build

cd build

if [ ! -f $vma_obj ]; then
	$vma_ld
fi

$cpp_compiler $vma_compile_flags $vma_source_files $vma_out $vma_obj

ar rcs libvma.a vmastdc++.o

$compile $source_files $compile_link $link_os_gfx $out $out_name