#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------

ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif

include $(DEVKITARM)/ds_rules

#---------------------------------------------------------------------------------
# TARGET is the name of the output
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# INCLUDES is a list of directories containing extra header files
# DATA is a list of directories containing binary files embedded using bin2o
# GRAPHICS is a list of directories containing image files to be converted with grit
# AUDIO is a list of directories containing audio to be converted by maxmod
# ICON is the image used to create the game icon, leave blank to use default rule
# NITRO is a directory that will be accessible via NitroFS
#---------------------------------------------------------------------------------
TARGET   := nds/ftpd
BUILD    := nds/build
SOURCES  := source source/nds
INCLUDES := include
DATA     :=
GRAPHICS :=
AUDIO    :=
ICON     :=

# specify a directory which contains the nitro filesystem
# this is relative to the Makefile
NITRO    :=

# These set the information text in the nds file
GAME_TITLE     := ftpd classic
GAME_SUBTITLE1 := v$(VERSION)
GAME_SUBTITLE2 := (c) 2023 mtheall

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
OPTIMIZE := -Og
ARCH := -marm -mthumb-interwork -march=armv5te -mtune=arm946e-s

CFLAGS   := -g -Wall $(OPTIMIZE) \
            $(ARCH) $(INCLUDE) -DARM9 -DNDS \
            -DSTATUS_STRING="\"ftpd v$(VERSION)\"" \
            -DNO_IPV6 -DCLASSIC -DFTPDCONFIG="\"/config/ftpd/ftpd.cfg\""
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++2a
ASFLAGS  := -g $(ARCH)
LDFLAGS   = -specs=ds_arm9.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map) $(OPTIMIZE)

CC  := `which ccache 2>/dev/null` $(CC)
CXX := `which ccache 2>/dev/null` $(CXX)

#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project (order is important)
#---------------------------------------------------------------------------------
LIBS := -lfat -ldswifi9 -lnds9

# automatigically add libraries for NitroFS
ifneq ($(strip $(NITRO)),)
LIBS := -lfilesystem -lfat $(LIBS)
endif
# automagically add maxmod library
ifneq ($(strip $(AUDIO)),)
LIBS := -lmm9 $(LIBS)
endif

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS := $(LIBNDS)

#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(TOPDIR)/$(BUILD),$(CURDIR))
#---------------------------------------------------------------------------------

export OUTPUT := $(CURDIR)/$(TARGET)
export TOPDIR := $(CURDIR)

export VPATH := $(CURDIR)/$(subst /,,$(dir $(ICON)))\
                $(foreach dir,$(SOURCES),$(CURDIR)/$(dir))\
                $(foreach dir,$(DATA),$(CURDIR)/$(dir))\
                $(foreach dir,$(GRAPHICS),$(CURDIR)/$(dir))

export DEPSDIR := $(CURDIR)/$(BUILD)

CFILES   := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES   := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
PNGFILES := $(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.png)))
BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))

# prepare NitroFS directory
ifneq ($(strip $(NITRO)),)
  export NITRO_FILES := $(CURDIR)/$(NITRO)
endif

# get audio list for maxmod
ifneq ($(strip $(AUDIO)),)
  export MODFILES	:=	$(foreach dir,$(notdir $(wildcard $(AUDIO)/*.*)),$(CURDIR)/$(AUDIO)/$(dir))

  # place the soundbank file in NitroFS if using it
  ifneq ($(strip $(NITRO)),)
    export SOUNDBANK := $(NITRO_FILES)/soundbank.bin

  # otherwise, needs to be loaded from memory
  else
    export SOUNDBANK := soundbank.bin
    BINFILES += $(SOUNDBANK)
  endif
endif

#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
  export LD := $(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
  export LD := $(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

export OFILES   := $(addsuffix .o,$(BINFILES))\
                   $(PNGFILES:.png=.o)\
                   $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
export INCLUDE  := $(foreach dir,$(INCLUDES),-iquote $(CURDIR)/$(dir))\
                   $(foreach dir,$(LIBDIRS),-I$(dir)/include)\
                   -I$(CURDIR)/$(BUILD)
export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib)

icons := $(wildcard $(dir $(TARGET))*.bmp)

ifneq (,$(findstring $(TARGET).bmp,$(icons)))
  export GAME_ICON := $(CURDIR)/$(TARGET).bmp
else
  ifneq (,$(findstring $(dir $(TARGET))icon.bmp,$(icons)))
    export GAME_ICON := $(CURDIR)/$(dir $(TARGET))icon.bmp
  endif
endif

.PHONY: $(BUILD) clean dslink

#---------------------------------------------------------------------------------
$(BUILD):
	@mkdir -p $@
	@$(MAKE) -C $(BUILD) -f $(CURDIR)/Makefile.nds

dslink: $(BUILD)
	@dslink $(OUTPUT).nds

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr $(BUILD) $(TARGET).elf $(TARGET).nds $(SOUNDBANK)

#---------------------------------------------------------------------------------
else

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(OUTPUT).nds: $(OUTPUT).elf
$(OUTPUT).elf: $(OFILES)

# need to build soundbank first
$(OFILES): $(SOUNDBANK) $(TOPDIR)/Makefile $(TOPDIR)/Makefile.nds

#---------------------------------------------------------------------------------
# rule to build solution from music files
#---------------------------------------------------------------------------------
$(SOUNDBANK) : $(MODFILES)
#---------------------------------------------------------------------------------
	mmutil $^ -d -o$@ -hsoundbank.h

#---------------------------------------------------------------------------------
%.bin.o: %.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	$(bin2o)

#---------------------------------------------------------------------------------
# This rule creates assembly source files using grit
# grit takes an image file and a .grit describing how the file is to be processed
# add additional rules like this for each image extension
# you use in the graphics folders
#---------------------------------------------------------------------------------
%.s %.h: %.png %.grit
#---------------------------------------------------------------------------------
	grit $< -fts -o$*

-include $(DEPSDIR)/*.d

#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------