### Build Options ###

# Override these options in settings.mk or with `make SETTING=value'.

BASEROM = baserom.z64
TARGET = papermario
COMPARE = 1
NON_MATCHING = 0
WATCH_INCLUDES = 1
WSL_ELEVATE_GUI = 1

# Fail early if baserom does not exist
ifeq ($(wildcard $(BASEROM)),)
$(error Baserom `$(BASEROM)' not found.)
endif

# NON_MATCHING=1 implies COMPARE=0
ifeq ($(NON_MATCHING),1)
override COMPARE=0
endif

# PERMUTER=1 implies WATCH_INCLUDES=0
ifeq ($(PERMUTER),1)
override WATCH_INCLUDES=0
endif


### Output ###

BUILD_DIR := build
ROM := $(TARGET).z64
ELF := $(BUILD_DIR)/$(TARGET).elf
LD_SCRIPT := $(TARGET).ld
LD_MAP := $(BUILD_DIR)/$(TARGET).map
ASSETS_BIN := $(BUILD_DIR)/bin/assets/assets.bin
MSG_BIN := $(BUILD_DIR)/msg.bin
NPC_BIN := $(BUILD_DIR)/sprite/npc.bin


### Tools ###

PYTHON := python3
N64CKSUM := tools/n64crc
SPLAT_YAML := tools/splat.yaml
SPLAT = $(PYTHON) tools/n64splat/split.py $(BASEROM) $(SPLAT_YAML) .
YAY0COMPRESS = tools/Yay0compress
EMULATOR = mupen64plus


CROSS := mips-linux-gnu-
AS := $(CROSS)as
OLD_AS := tools/mips-nintendo-nu64-as
CC := tools/cc1
CPP := cpp
LD := $(CROSS)ld
OBJCOPY := $(CROSS)objcopy

WSL := 0
JAVA := java

UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
	OS=linux
	ICONV := iconv --from UTF-8 --to SHIFT-JIS

	ifeq ($(findstring microsoft,$(shell cat /proc/sys/kernel/osrelease)),microsoft)
	WSL := 1
	ifeq ($(WSL_ELEVATE_GUI),1)
		JAVA := powershell.exe -command java
	endif
endif
endif
ifeq ($(UNAME_S),Darwin)
	OS=mac
	ICONV := tools/iconv.py UTF-8 SHIFT-JIS
endif

OLD_AS=tools/$(OS)/mips-nintendo-nu64-as
CC=tools/$(OS)/cc1

### Compiler Options ###

CPPFLAGS   := -Iinclude -Isrc -D _LANGUAGE_C -D _FINALROM -ffreestanding -DF3DEX_GBI_2 -D_MIPS_SZLONG=32 -Wundef -Wcomment
ASFLAGS    := -EB -Iinclude -march=vr4300 -mtune=vr4300
OLDASFLAGS := -EB -Iinclude -G 0
CFLAGS     := -O2 -quiet -G 0 -mcpu=vr4300 -mfix4300 -mips3 -mgp32 -mfp32 -Wimplicit -Wuninitialized -Wshadow
LDFLAGS    := -T undefined_syms.txt -T undefined_syms_auto.txt -T undefined_funcs.txt -T undefined_funcs_auto.txt -T $(BUILD_DIR)/$(LD_SCRIPT) -Map $(LD_MAP) --no-check-sections

ifeq ($(WATCH_INCLUDES),1)
CPPMFLAGS   = -MP -MD -MF $@.mk -MT $(BUILD_DIR)/$*.d
MDEPS       = $(BUILD_DIR)/%.d
endif

ifeq ($(NON_MATCHING),1)
CPPFLAGS += -DNON_MATCHING
endif

-include settings.mk

### Sources ###

include sources.mk

ifeq ($(PERMUTER),1)
override OBJECTS:=$(filter %.c.o, $(OBJECTS))
endif

%.d: ;

ifeq ($(WATCH_INCLUDES),1)
-include $(foreach obj, $(OBJECTS), $(obj).mk)
endif

NPC_DIRS := $(foreach npc, $(NPC_SPRITES), sprite/npc/$(npc))

GENERATED_HEADERS := include/ld_addrs.h $(foreach dir, $(NPC_DIRS), include/$(dir).h)


### Targets ###

clean:
	rm -rf $(BUILD_DIR) $(LD_SCRIPT)

clean-all:
	rm -rf $(BUILD_DIR) bin msg img sprite .splat_cache $(LD_SCRIPT)

clean-code:
	rm -rf $(BUILD_DIR)/src

tools:
	make -C tools

setup: clean-all submodules tools
	@make split

# tools/star-rod submodule intentionally omitted
submodules:
	git submodule init tools/n64splat
	git submodule update --recursive

split:
	make $(LD_SCRIPT) -W $(SPLAT_YAML)

split-%:
	$(SPLAT) --modes ld $* --verbose

split-all:
	$(SPLAT) --modes all

test: $(ROM)
	$(EMULATOR) $<

%.bin: $(LD_SCRIPT)

# Compressed files
%.Yay0: %
	@mkdir -p $(shell dirname $@)
	$(YAY0COMPRESS) $< $@
$(BUILD_DIR)/%.bin.Yay0: %.bin
	@mkdir -p $(shell dirname $@)
	$(YAY0COMPRESS) $< $@

# Data objects
$(BUILD_DIR)/%.bin.o: %.bin
	@mkdir -p $(shell dirname $@)
	$(LD) -r -b binary -o $@ $<

# Compressed data objects
$(BUILD_DIR)/%.Yay0.o: $(BUILD_DIR)/%.bin.Yay0
	@mkdir -p $(shell dirname $@)
	$(LD) -r -b binary -o $@ $<

# Compile C files
$(BUILD_DIR)/%.c.o: %.c $(MDEPS) | $(GENERATED_HEADERS)
	@mkdir -p $(shell dirname $@)
	$(CPP) $(CPPFLAGS) -o - $(CPPMFLAGS) $< | $(ICONV) | $(CC) $(CFLAGS) -o - | $(OLD_AS) $(OLDASFLAGS) -o $@ -

# Compile C files (with DSL macros)
$(foreach cfile, $(DSL_C_FILES), $(BUILD_DIR)/$(cfile).o): $(BUILD_DIR)/%.c.o: %.c $(MDEPS) tools/compile_dsl_macros.py | $(GENERATED_HEADERS)
	@mkdir -p $(shell dirname $@)
	$(CPP) $(CPPFLAGS) -o - $< $(CPPMFLAGS) | $(PYTHON) tools/compile_dsl_macros.py | $(ICONV) | $(CC) $(CFLAGS) -o - | $(OLD_AS) $(OLDASFLAGS) -o $@ -

# Assemble handwritten ASM
$(BUILD_DIR)/%.s.o: %.s
	@mkdir -p $(shell dirname $@)
	$(AS) $(ASFLAGS) -o $@ $<

# Data
$(BUILD_DIR)/data/%.data.o: asm/data/%.data.s
	@mkdir -p $(shell dirname $@)
	$(AS) $(ASFLAGS) -o $@ $<

# Rodata
$(BUILD_DIR)/rodata/%.rodata.o: asm/data/%.rodata.s
	@mkdir -p $(shell dirname $@)
	$(AS) $(ASFLAGS) -o $@ $<

# Images
$(BUILD_DIR)/%.png.o: $(BUILD_DIR)/%.png
	$(LD) -r -b binary -o $@ $<
$(BUILD_DIR)/%.rgba16.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py rgba16 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.rgba32.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py rgba32 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.ci8.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py ci8 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.ci4.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py ci4 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.palette.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py palette $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.ia4.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py ia4 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.ia8.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py ia8 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.ia16.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py ia16 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.i4.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py i4 $< $@ $(IMG_FLAGS)
$(BUILD_DIR)/%.i8.png: %.png
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/convert_image.py i8 $< $@ $(IMG_FLAGS)

# Assets
ASSET_FILES := $(foreach asset, $(ASSETS), $(BUILD_DIR)/bin/assets/$(asset))
YAY0_ASSET_FILES := $(foreach asset, $(filter-out %_tex, $(ASSET_FILES)), $(asset).Yay0)
$(BUILD_DIR)/bin/assets/%: bin/assets/%.bin
	@mkdir -p $(shell dirname $@)
	@cp $< $@
$(ASSETS_BIN): $(ASSET_FILES) $(YAY0_ASSET_FILES) sources.mk
	@mkdir -p $(shell dirname $@)
	@echo "building $@"
	@$(PYTHON) tools/build_assets_bin.py $@ $(ASSET_FILES)
$(ASSETS_BIN:.bin=.o): $(ASSETS_BIN)
	$(LD) -r -b binary -o $@ $<

# Messages
$(MSG_BIN): $(MESSAGES)
	@mkdir -p $(shell dirname $@)
	@echo "building $@"
	@$(PYTHON) tools/compile_messages.py $@ /dev/null $(MESSAGES)
$(MSG_BIN:.bin=.o): $(MSG_BIN)
	$(LD) -r -b binary -o $@ $<

# Sprites
$(foreach npc, $(NPC_SPRITES), $(eval $(BUILD_DIR)/sprite/npc/$(npc):: $(shell find sprite/npc/$(npc) -type f 2> /dev/null))) # dependencies
NPC_YAY0 := $(foreach npc, $(NPC_SPRITES), $(BUILD_DIR)/sprite/npc/$(npc).Yay0)
$(BUILD_DIR)/sprite/npc/%:: sprite/npc/% tools/compile_npc_sprite.py
	@mkdir -p $(shell dirname $@)
	$(PYTHON) tools/compile_npc_sprite.py $@ $<
$(NPC_BIN): $(NPC_YAY0) tools/compile_npc_sprites.py
	@mkdir -p $(shell dirname $@)
	@echo "building $@"
	@$(PYTHON) tools/compile_npc_sprites.py $@ $(NPC_YAY0)
$(NPC_BIN:.bin=.o): $(NPC_BIN)
	$(LD) -r -b binary -o $@ $<
include/sprite/npc/%.h: sprite/npc/%/SpriteSheet.xml tools/gen_sprite_animations_h.py
	@mkdir -p $(shell dirname $@)
	@echo "building $@"
	@$(PYTHON) tools/gen_sprite_animations_h.py $@ sprite/npc/$* $(NPC_DIRS)


### Linker ###

$(LD_SCRIPT): $(SPLAT_YAML)
	$(SPLAT) --modes ld bin Yay0 PaperMarioMapFS PaperMarioMessages img PaperMarioNpcSprites --new

$(BUILD_DIR)/$(LD_SCRIPT): $(LD_SCRIPT)
	@mkdir -p $(shell dirname $@)
	$(CPP) -P -DBUILD_DIR=$(BUILD_DIR) -o $@ $<

$(ROM): $(BUILD_DIR)/$(TARGET).bin
	@cp $< $@
ifeq ($(COMPARE),1)
	@sha1sum -c checksum.sha1 || (echo 'The build succeeded, but did not match the base ROM. This is expected if you are making changes to the game. To skip this check, use "make COMPARE=0".' && false)
endif

$(BUILD_DIR)/$(TARGET).elf: $(BUILD_DIR)/$(LD_SCRIPT) $(OBJECTS)
	$(LD) $(LDFLAGS) -o $@

$(BUILD_DIR)/$(TARGET).bin: $(BUILD_DIR)/$(TARGET).elf
	$(OBJCOPY) $< $@ -O binary

include/ld_addrs.h: $(BUILD_DIR)/$(LD_SCRIPT)
	grep -E "[^\. ]+ =" $< -o | sed 's/^/extern void* /; s/ =/;/' > $@


### Star Rod (optional) ###

STAR_ROD := cd tools/star-rod && $(JAVA) -jar StarRod.jar

# lazily initialise the submodule
tools/star-rod:
	git submodule init tools/star-rod

sprite/SpriteTable.xml: tools/star-rod sources.mk
	$(PYTHON) tools/star-rod/spritetable.xml.py $(NPC_SPRITES) > $@

editor: tools/star-rod sprite/SpriteTable.xml
	$(STAR_ROD)


### Make Settings ###

.PHONY: clean tools test setup submodules split editor $(ROM)
.DELETE_ON_ERROR:
.SECONDARY:
.PRECIOUS: $(ROM) %.Yay0
.DEFAULT_GOAL := $(ROM)

# Remove built-in implicit rules to improve performance
MAKEFLAGS += --no-builtin-rules

# Fail targets if any command in the pipe exits with error
SHELL = /bin/bash -e -o pipefail