CFLAGS = -Isaturn

OPT ?= -O3
LIB = ./saturn

GEN_PYTHON_SOURCE = $(wildcard tools/source/*.py) $(wildcard tools/generate/*.py)

GEN_SRC =
GEN_SRC += gen/maps.cpp
GEN_SRC += gen/map_objects.cpp
GEN_SRC += gen/sprites.cpp
GEN_SRC += gen/tilesets.cpp
GEN_SRC += gen/collision_tile_ids.cpp

SRC =
SRC += $(GEN_SRC)
SRC += main.cpp
SRC += input.cpp
SRC += vram.cpp
SRC += font.cpp

DEP = $(patsubst %.cpp,%.cpp.d,$(SRC))

res = $(subst pokered/,res/,$(patsubst %.$(1),%.$(1).o,$(wildcard $(2)*.$(1))))
res_png = $(subst pokered/,res/,$(patsubst %.png,%.$(1).o,$(wildcard $(2)*.png)))

GFX_TILESETS = $(call res_png,2bpp,pokered/gfx/tilesets/)
GFX_BLOCKSETS = $(call res,bst,pokered/gfx/blocksets/)
GFX_SPRITES = $(call res_png,2bpp,pokered/gfx/sprites/)
MAPS_BLOCKS = $(call res,blk,pokered/maps/)
FONTS = res/font.2bpp.o

GENERATED = $(GFX_TILESETS) $(GFX_BLOCKSETS) $(GFX_SPRITES) $(MAPS_BLOCKS) $(GEN_SRC) $(FONTS)

OBJ = $(patsubst %.cpp,%.o,$(SRC) $(GENERATED))

all: main.cue

include $(LIB)/common.mk
-include $(DEP)

define LINK_BINARY
	@mkdir -p $(dir $@)
	ln -sf $(shell realpath --relative-to="$(dir $@)" $<) $@
endef

define RUN_GENERATE
	@mkdir -p ./gen
	PYTHONPATH=./tools python -m generate ./pokered ./gen ./res
endef

gen/%.hpp: $(GEN_PYTHON_SOURCE)
	$(RUN_GENERATE) $@

gen/%.cpp: gen/%.hpp $(GEN_PYTHON_SOURCE)
	$(RUN_GENERATE) $@

define PNG_TO_2BPP
	@mkdir -p $(dir $@)
	python tools/png_to_nbpp.py 2 $@ $<
endef

res/%.2bpp: derived/%.png
	$(PNG_TO_2BPP)

res/%.2bpp: pokered/%.png
	$(PNG_TO_2BPP)

res/.1bpp: pokered/%.png
	@mkdir -p $(dir $@)
	python tools/png_to_nbpp.py 1 $@ $<

res/gfx/sprites/%.2bpp: pokered/gfx/sprites/%.png
	@mkdir -p $(dir $@)
	python tools/png_to_nbpp_sprite.py 2 $@ $<

%.2bpp.h:
	$(BUILD_BINARY_H)

%.2bpp.o: %.2bpp %.2bpp.h
	$(BUILD_BINARY_O)

res/%.blk: pokered/%.blk
	$(LINK_BINARY)

%.blk.h:
	$(BUILD_BINARY_H)

%.blk.o: %.blk %.blk.h
	$(BUILD_BINARY_O)

res/%.bst: pokered/%.bst
	$(LINK_BINARY)

%.bst.h:
	$(BUILD_BINARY_H)

%.bst.o: %.bst %.bst.h
	$(BUILD_BINARY_O)

%.o: | $(GFX_TILESETS)

main.elf: $(OBJ) $(LIBGCC)

clean: clean-sh
clean-sh:
	rm -rf res gen

generated: $(GENERATED)

PHONY: generated