include $(DEVKITARM)/base_tools

COMPARE ?= 0

ifeq (compare,$(MAKECMDGOALS))
COMPARE := 1
endif

CPP := $(CC) -E
LD := $(DEVKITARM)/bin/arm-none-eabi-ld

GAME_LANGUAGE := ENGLISH

REVISION := 0
TITLE       := AGB KIRBY AM
GAME_CODE   := B8KE
MAKER_CODE  := 01

SHELL := /bin/bash -o pipefail

BUILD_NAME  := speed_eaters
ROM := $(BUILD_NAME).gba
OBJ_DIR := build/$(BUILD_NAME)

ELF = $(ROM:.gba=.elf)
MAP = $(ROM:.gba=.map)

C_SUBDIR = src
DATA_C_SUBDIR = src/data
ASM_SUBDIR = asm
DATA_ASM_SUBDIR = data

C_BUILDDIR = $(OBJ_DIR)/$(C_SUBDIR)
ASM_BUILDDIR = $(OBJ_DIR)/$(ASM_SUBDIR)
DATA_ASM_BUILDDIR = $(OBJ_DIR)/$(DATA_ASM_SUBDIR)

ASFLAGS := -mcpu=arm7tdmi --defsym REVISION=$(REVISION) --defsym $(GAME_LANGUAGE)=1

CC1 := ../../tools/agbcc/bin/agbcc
override CFLAGS += -mthumb-interwork -Wimplicit -Wparentheses -Werror -O0 -g -fhex-asm -f2003-patch -ffix-debug-line

CPPFLAGS := -I ../../tools/agbcc -I ../../tools/agbcc/include -iquote include -nostdinc -DREVISION=$(REVISION) -D$(GAME_LANGUAGE)

LDFLAGS = -Map ../../$(MAP)

LIB := -L ../../../../tools/agbcc/lib -lc -lgcc

SHA1 := $(shell { command -v sha1sum || command -v shasum; } 2>/dev/null) -c
GFX := ../../tools/gbagfx/gbagfx
SCANINC := ../../tools/scaninc/scaninc
PREPROC := ../../tools/preproc/preproc
FIX := ../../tools/gbafix/gbafix

# Clear the default suffixes
.SUFFIXES:
# Don't delete intermediate files
.SECONDARY:
# Delete files that weren't built properly
.DELETE_ON_ERROR:
# Secondary expansion is required for dependency variables in object rules.
.SECONDEXPANSION:

$(shell mkdir -p $(C_BUILDDIR) $(ASM_BUILDDIR) $(DATA_ASM_BUILDDIR))

infoshell = $(foreach line, $(shell $1 | sed "s/ /__SPACE__/g"), $(info $(subst __SPACE__, ,$(line))))

C_SRCS := $(wildcard $(C_SUBDIR)/*.c)
C_OBJS := $(patsubst $(C_SUBDIR)/%.c,$(C_BUILDDIR)/%.o,$(C_SRCS))

ASM_SRCS := $(wildcard $(ASM_SUBDIR)/*.s)
ASM_OBJS := $(patsubst $(ASM_SUBDIR)/%.s,$(ASM_BUILDDIR)/%.o,$(ASM_SRCS))

DATA_ASM_SRCS := $(wildcard $(DATA_ASM_SUBDIR)/*.s)
DATA_ASM_OBJS := $(patsubst $(DATA_ASM_SUBDIR)/%.s,$(DATA_ASM_BUILDDIR)/%.o,$(DATA_ASM_SRCS))

OBJS := $(C_OBJS) $(ASM_OBJS) $(DATA_ASM_OBJS)
OBJS_REL := $(patsubst $(OBJ_DIR)/%,%,$(OBJS))

TOOLDIRS := $(filter-out ../../tools/agbcc ../../tools/binutils,$(wildcard ../../tools/*))
TOOLBASE = $(TOOLDIRS:../../tools/%=%)
TOOLS = $(foreach tool,$(TOOLBASE),../../tools/$(tool)/$(tool)$(EXE))

.PHONY: all rom tools mostlyclean clean compare tidy payload $(TOOLDIRS)

MAKEFLAGS += --no-print-directory

AUTO_GEN_TARGETS :=

# hacky... can't think of a way to resolve the scaninc/jobserver conflict
ifeq (,$(filter-out all rom compare payload,$(MAKECMDGOALS)))
-include tools
endif

all: tools rom

rom: $(ROM)
ifeq ($(COMPARE),1)
	@$(SHA1) $(BUILD_NAME).sha1
endif

tools: $(TOOLDIRS)

$(TOOLDIRS):
	@$(MAKE) -C $@

# For contributors to make sure a change didn't affect the contents of the ROM.
compare: all

mostlyclean: tidy
	@find . \( -iname '*.1bpp' -o -iname '*.4bpp' -o -iname '*.8bpp' -o -iname '*.gbapal' -o -iname '*.lz' -o -iname '*.rl' -o -iname '*.latfont' -o -iname '*.hwjpnfont' -o -iname '*.fwjpnfont' \) -exec rm {} +
	@rm -f $(AUTO_GEN_TARGETS)
	@$(MAKE) -C payload $@

clean: mostlyclean
	@$(MAKE) -C payload $@

tidy:
	@rm -f $(ROM) $(ELF) $(MAP)
	@rm -r build/*
	@$(MAKE) -C payload $@

%.s: ;

ifeq ($(NODEP),1)
$(C_BUILDDIR)/%.o: c_dep :=
else
$(C_BUILDDIR)/%.o: c_dep = $(shell $(SCANINC) -I include $(C_SUBDIR)/$*.c)
endif

$(C_BUILDDIR)/%.o : $(C_SUBDIR)/%.c $$(c_dep)
	@$(CPP) $(CPPFLAGS) $< -o $(C_BUILDDIR)/$*.i
	@$(PREPROC) $(C_BUILDDIR)/$*.i | $(CC1) $(CFLAGS) -o $(C_BUILDDIR)/$*.s
	@echo -e "\t.text\n\t.align\t2, 0 @ Don't pad with nop\n" >> $(C_BUILDDIR)/$*.s
	$(AS) $(ASFLAGS) -o $@ $(C_BUILDDIR)/$*.s

ifeq ($(NODEP),1)
$(ASM_BUILDDIR)/%.o: asm_dep :=
else
$(ASM_BUILDDIR)/%.o: asm_dep = $(shell $(SCANINC) -I . $(ASM_SUBDIR)/$*.s)
endif

$(ASM_BUILDDIR)/%.o: $(ASM_SUBDIR)/%.s $$(asm_dep)
	$(AS) $(ASFLAGS) -o $@ $<

ifeq ($(NODEP),1)
$(DATA_ASM_BUILDDIR)/%.o: data_dep :=
else
$(DATA_ASM_BUILDDIR)/%.o: data_dep = $(shell $(SCANINC) -I . $(DATA_ASM_SUBDIR)/$*.s)
endif

$(DATA_ASM_BUILDDIR)/%.o: $(DATA_ASM_SUBDIR)/%.s $$(data_dep)
	$(PREPROC) $< | $(CPP) -I include -nostdinc -undef -Wno-unicode - | $(AS) $(ASFLAGS) -o $@

payload: ;

payload/payload.gba: payload
	@$(MAKE) -C payload COMPARE=$(COMPARE)

data/payload.gba.lz: payload/payload.gba
	$(GFX) $< $@

$(ELF): $(OBJS) linker.ld
	cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ../../linker.ld -o ../../$@ $(LIB)

$(ROM): $(ELF)
	$(OBJCOPY) -O binary $< $@
	$(FIX) $@ -t"$(TITLE)" -c$(GAME_CODE) -m$(MAKER_CODE) -r$(REVISION) --silent
