HOSTCXX:=$(CXX)

ifeq ($(TARGET),SDL)
# SDL
CC=gcc
CXX=g++
LD=g++
STRIP=strip

SDL_INCLUDE=$(shell pkg-config --cflags sdl2)
SDL_LIBS=$(shell pkg-config --libs sdl2)

CFLAGS=-g -DBUILD_SDL $(SDL_INCLUDE)
CXXFLAGS=$(CFLAGS)
LDFLAGS=
LDLIBS=$(SDL_LIBS) -lstdc++
EXE=game
EXTRA_FILES=
SYSTEM=SDL
PLATFORM_OBJ=
else ifeq ($(TARGET),SDLWIN)
# SDL on Windows
CC=i686-w64-mingw32-gcc
CXX=i686-w64-mingw32-g++
LD=i686-w64-mingw32-g++
STRIP=i686-w64-mingw32-strip
WINDRES=i686-w64-mingw32-windres

SDL_INCLUDE=-I/usr/i686-w64-mingw32/include/SDL2
SDL_LDFLAGS=-L/usr/i686-w64-mingw32/lib
SDL_LIBS=-lmingw32 -lSDL2main -lSDL2.dll

CFLAGS=-g -DBUILD_SDL $(SDL_INCLUDE) -m32
CXXFLAGS=$(CFLAGS)
LDFLAGS=$(SDL_LDFLAGS)
#LDFLAGS+=-mwindows
LDLIBS=$(SDL_LIBS) -lstdc++
EXE=game.exe
EXTRA_FILES=$(shell find /usr/i686-w64-mingw32/ -iname 'SDL2.dll' | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/i686-w64-mingw32/ -iname 'libgcc_s_dw2-1.dll' | grep win32 | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/i686-w64-mingw32/ -iname 'libgcc_s_seh-1.dll' | grep win32 | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/i686-w64-mingw32/ -iname 'libstdc++-6.dll' | grep win32 | head -n1)
SYSTEM=SDL
PLATFORM_OBJ=app.res
else ifeq ($(TARGET),SDLWIN64)
# SDL on Windows
CC=x86_64-w64-mingw32-gcc
CXX=x86_64-w64-mingw32-g++
LD=x86_64-w64-mingw32-g++
STRIP=x86_64-w64-mingw32-strip
WINDRES=x86_64-w64-mingw32-windres

SDL_INCLUDE=-I/usr/x86_64-w64-mingw32/include/SDL2
SDL_LDFLAGS=-L/usr/x86_64-w64-mingw32/lib
SDL_LIBS=-lmingw32 -lSDL2main -lSDL2.dll

CFLAGS=-g -DBUILD_SDL $(SDL_INCLUDE) -m64
CXXFLAGS=$(CFLAGS)
LDFLAGS=$(SDL_LDFLAGS)
#LDFLAGS+=-mwindows
LDLIBS=$(SDL_LIBS) -lstdc++
EXE=game.exe
EXTRA_FILES=$(shell find /usr/x86_64-w64-mingw32/ -iname 'SDL2.dll' | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/x86_64-w64-mingw32/ -iname 'libgcc_s_dw2-1.dll' | grep win32 | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/x86_64-w64-mingw32/ -iname 'libgcc_s_seh-1.dll' | grep win32 | head -n1)
EXTRA_FILES+=$(shell find /usr/lib/gcc/x86_64-w64-mingw32/ -iname 'libstdc++-6.dll' | grep win32 | head -n1)
SYSTEM=SDL
PLATFORM_OBJ=app.res
else
# DOS
CC=i586-pc-msdosdjgpp-gcc
CXX=i586-pc-msdosdjgpp-g++
LD=i586-pc-msdosdjgpp-g++
STRIP=i586-pc-msdosdjgpp-strip

# FIXME: we override the host compiler to build tools here, maybe move tools to a separate Makefile
HOSTCXX=g++

CFLAGS=-O3 -march=i486
CXXFLAGS=$(CFLAGS)
LDFLAGS=
LDLIBS=
EXE=game.exe
DPMI_HOST=CWSDPMI.EXE
EXTRA_FILES=install.bat $(DPMI_HOST)
SYSTEM=DOS
PLATFORM_OBJ=
endif

OBJ=main.o
OBJ+=$(PLATFORM_OBJ)
OBJ+=$(patsubst %.cpp,%.o,$(wildcard graphics/*.cpp))
OBJ+=$(patsubst %.cpp,%.o,$(wildcard audio/*.cpp))
OBJ+=$(patsubst %.cpp,%.o,$(wildcard util/*.cpp))
OBJ+=$(patsubst %.cpp,%.o,$(wildcard scenes/*.cpp))

ifeq ($(SYSTEM),SDL)
OBJ+=$(patsubst %.cpp,%.o,$(wildcard system/sdl/*.cpp))
else ifeq ($(SYSTEM),DOS)
OBJ+=$(patsubst %.cpp,%.o,$(wildcard system/dos/*.cpp))
else
$(error Unknown SYSTEM variable:$(SYSTEM))
endif

CONVERTER_CXX=$(HOSTCXX)
CONVERTER_EXE=gbmconv
CONVERTER_SRC=converter.cpp
CONVERTER_SRC+=graphics/Bitmap.cpp
CONVERTER_SRC+=util/Files.cpp util/Bmp.cpp util/Gbm.cpp

COMPILED_GFX_ASSETS=assets/font1.gbm assets/cow.gbm assets/witch.gbm
GFX_ASSETS=assets/bg.bmp $(COMPILED_GFX_ASSETS)
MUSIC_ASSETS=assets/rain.rad assets/getup.rad assets/spiral.rad

RELEASE_FILES=$(EXE) $(GFX_ASSETS) $(MUSIC_ASSETS) $(EXTRA_FILES)

FLOPPY_IMG=game.img

.PHONY: all clean release debug assets floppy

all: $(CONVERTER_EXE) $(EXE)

clean: ; rm -rf $(OBJ) $(EXE) $(CONVERTER_EXE) $(FLOPPY_IMG) $(COMPILED_GFX_ASSETS) release debug

release: all assets; $(STRIP) $(EXE); upx $(EXE); mkdir -p release; cp -Rv $(RELEASE_FILES) release/

debug: all assets; mkdir -p debug; cp -Rv $(RELEASE_FILES) debug/

floppy: release; dd if=/dev/zero of=$(FLOPPY_IMG) bs=512 count=2880 && mkfs.fat -F12 $(FLOPPY_IMG) && mcopy -i $(FLOPPY_IMG) -s release/* ::

$(CONVERTER_EXE): $(CONVERTER_SRC); $(CONVERTER_CXX) -o $@ $(CONVERTER_SRC)

$(EXE): $(OBJ); $(LD) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)

%.o : %.c ; $(CC) $(CFLAGS) -c $< -o $@

%.o : %.cpp ; $(CXX) $(CXXFLAGS) -c $< -o $@

assets: $(CONVERTER_EXE) $(GFX_ASSETS)

%.gbm : %.bmp %_m.bmp $(CONVERTER_EXE) ; ./$(CONVERTER_EXE) $@ $^

%.res : %.rc ; $(WINDRES) $< -O coff -o $@