PYTHON ?= python

# Graphics
SPRITE_PNG := $(shell find png/sprite -type f -name '*.png')
BG_PNG     := $(shell find png/bg -type f -name '*.png')
MAP_PNG    := $(shell find png/map -type f -name '*.png' -not -name '*_coll.png')
MAP_COLL   := $(shell find png/map -type f -name '*_coll.png')

# Graphics (generated)
MAP_S	    := $(MAP_PNG:%.png=%.s)
MAP_INC     := $(MAP_PNG:%.png=%.inc)
SPRITE_2BPP := $(SPRITE_PNG:%.png=%.2bpp)
BG_DATA     := $(BG_PNG:%.png=%.2bpp) $(BG_PNG:%.png=%.tilemap)

# Code
SFILES := $(shell find src -type f -name '*.s')
OFILES := $(SFILES:%.s=%.o) $(MAP_S:%.s=%.o)

.PHONY: clean

is.gb is.gb.sym: $(OFILES)
	@echo "[LINK]     is.gb"
	@rgblink -o $@ -n $@.sym $(OFILES)
	@rgbfix -v -p 0 $@

$(OFILES): $(MAP_INC)
$(OFILES): $(SPRITE_2BPP)
$(OFILES): $(BG_DATA)

%.o: %.s
	@echo "[ASSEMBLE] $<"
	@rgbasm -i inc -o $@ $<

png/map/%.s png/map/%.inc: png/map/%.png png/map/%_coll.png
	@echo "[MAP]      $<"
	@$(PYTHON) scripts/generate_map.py $<

png/sprite/%.2bpp: png/sprite/%.png
	@echo "[SPRITE]   $<"
	@rgbgfx -o $@ $<

png/bg/%.2bpp png/bg/%.tilemap: png/bg/%.png
	@echo "[BG]       $<"
	@rgbgfx -T -u -o "$(shell dirname $<)/$(shell basename --suffix=.png $<).2bpp" $<

clean:
	@rm -f is.gb is.gb.sym $(OFILES) $(MAP_S) $(MAP_INC) $(SPRITE_2BPP) $(BG_DATA)
	@echo "All build files removed"