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

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

TOPDIR ?= $(CURDIR)
include $(DEVKITPRO)/libnx/switch_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
# DATA is a list of directories containing data files
# INCLUDES is a list of directories containing header files
# ROMFS is the directory containing data to be added to RomFS, relative to the Makefile (Optional)
#
# NO_ICON: if set to anything, do not use icon.
# NO_NACP: if set to anything, no .nacp file is generated.
# APP_TITLE is the name of the app stored in the .nacp file (Optional)
# APP_AUTHOR is the author of the app stored in the .nacp file (Optional)
# APP_VERSION is the version of the app stored in the .nacp file (Optional)
# APP_TITLEID is the titleID of the app stored in the .nacp file (Optional)
# ICON is the filename of the icon (.jpg), relative to the project folder.
#   If not set, it attempts to use one of the following (in this order):
#     - <Project name>.jpg
#     - icon.jpg
#     - <libnx folder>/default_icon.jpg
#
# CONFIG_JSON is the filename of the NPDM config file (.json), relative to the project folder.
#   If not set, it attempts to use one of the following (in this order):
#     - <Project name>.json
#     - config.json
#   If a JSON file is provided or autodetected, an ExeFS PFS0 (.nsp) is built instead
#   of a homebrew executable (.nro). This is intended to be used for sysmodules.
#   NACP building is skipped as well.
#---------------------------------------------------------------------------------
APP_AUTHOR	:=	(c) 2023 Michael Theall, Dave Murphy, TuxSH
ICON		:=	meta/ftpd.jpg
APP_VERSION	:=	$(VERSION)

SOURCES		:=	source source/switch
DATA		:=	data
INCLUDES	:=	include

ifeq ($(strip $(CLASSIC)),)
APP_TITLE	:=	ftpd pro $(VERSION)
TARGET		:=	switch/ftpd
BUILD		:=	switch/build
SOURCES		+=	source/imgui
GRAPHICS	:=	switch/gfx
ROMFS		:=	switch/romfs
else
APP_TITLE	:=	ftpd classic $(VERSION)
TARGET		:=	switch-classic/ftpd-classic
BUILD		:=	switch-classic/build
endif

# Output folders for autogenerated files in romfs
OUT_SHADERS	:=	shaders

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
OPTIMIZE:=	-Og
ARCH	:=	-march=armv8-a+crc+crypto -mtune=cortex-a57 -mtp=soft -fPIE

CFLAGS	:=	-g -Wall -Wno-narrowing $(OPTIMIZE) \
			-ffunction-sections -fdata-sections \
			$(ARCH) $(DEFINES) $(CLASSIC) -DNO_IPV6

CFLAGS	+=	$(INCLUDE) -D__SWITCH__ \
			-DSTATUS_STRING="\"ftpd v$(VERSION)\"" \
			-DFTPDCONFIG="\"/config/ftpd/ftpd.cfg\"" \
			`$(PREFIX)pkg-config --cflags libzstd` \
			`curl-config --cflags`

CXXFLAGS	:= $(CFLAGS) -std=gnu++2a -fno-exceptions -fno-rtti

ASFLAGS	:=	-g $(ARCH)
LDFLAGS	=	-specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) \
			$(OPTIMIZE) -Wl,-Map,$(notdir $*.map) -Wl,--gc-sections

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

LIBS	:= `curl-config --libs` `$(PREFIX)pkg-config --libs libzstd` -ldeko3d -lnx

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


#---------------------------------------------------------------------------------
# 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	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
			$(foreach dir,$(DATA),$(CURDIR)/$(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)))
GLSLFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.glsl)))
PNGFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.png)))
ASTCFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.astc)))
BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))

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

export OFILES_BIN	:=	$(addsuffix .o,$(BINFILES))
export OFILES_SRC	:=	$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
export OFILES 	:=	$(OFILES_BIN) $(OFILES_SRC)
export HFILES_BIN	:=	$(addsuffix .h,$(subst .,_,$(BINFILES)))

ifneq ($(strip $(ROMFS)),)
	ROMFS_TARGETS :=
	ROMFS_FOLDERS :=
	ifneq ($(strip $(OUT_SHADERS)),)
		ROMFS_SHADERS := $(ROMFS)/$(OUT_SHADERS)
		ROMFS_TARGETS += $(patsubst %.glsl, $(ROMFS_SHADERS)/%.dksh, $(GLSLFILES))
		ROMFS_FOLDERS += $(ROMFS_SHADERS)
	endif

	ROMFS_PNG     := $(addprefix $(ROMFS)/,$(PNGFILES:.png=.rgba.zst))
	ROMFS_ASTC    := $(addprefix $(ROMFS)/,$(ASTCFILES:.astc=.astc.zst))
	ROMFS_GFX     := $(ROMFS_PNG) $(ROMFS_ASTC)
	ROMFS_TARGETS += $(ROMFS_GFX)
	ROMFS_FOLDERS += $(ROMFS)

	export ROMFS_DEPS := $(foreach file,$(ROMFS_TARGETS),$(CURDIR)/$(file))
endif

export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
			-I$(CURDIR)/$(BUILD)

export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)

ifeq ($(strip $(CONFIG_JSON)),)
	jsons := $(wildcard *.json)
	ifneq (,$(findstring $(TARGET).json,$(jsons)))
		export APP_JSON := $(TOPDIR)/$(TARGET).json
	else
		ifneq (,$(findstring config.json,$(jsons)))
			export APP_JSON := $(TOPDIR)/config.json
		endif
	endif
else
	export APP_JSON := $(TOPDIR)/$(CONFIG_JSON)
endif

ifeq ($(strip $(ICON)),)
	icons := $(wildcard *.jpg)
	ifneq (,$(findstring $(TARGET).jpg,$(icons)))
		export APP_ICON := $(TOPDIR)/$(TARGET).jpg
	else
		ifneq (,$(findstring icon.jpg,$(icons)))
			export APP_ICON := $(TOPDIR)/icon.jpg
		endif
	endif
else
	export APP_ICON := $(TOPDIR)/$(ICON)
endif

ifeq ($(strip $(NO_ICON)),)
	export NROFLAGS += --icon=$(APP_ICON)
endif

ifeq ($(strip $(NO_NACP)),)
	export NROFLAGS += --nacp=$(CURDIR)/$(TARGET).nacp
endif

ifneq ($(APP_TITLEID),)
	export NACPFLAGS += --titleid=$(APP_TITLEID)
endif

ifneq ($(ROMFS),)
	export NROFLAGS += --romfsdir=$(CURDIR)/$(ROMFS)
endif

.PHONY: all clean

#---------------------------------------------------------------------------------
all: $(ROMFS_TARGETS) | $(BUILD)
	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile.switch

nxlink: all
	@nxlink -s $(OUTPUT).nro

$(BUILD):
	@mkdir -p $@

ifneq ($(strip $(ROMFS_TARGETS)),)

$(ROMFS_TARGETS): | $(ROMFS_FOLDERS)

$(ROMFS_FOLDERS):
	@mkdir -p $@

$(BUILD)/%.rgba: $(GRAPHICS)/%.png | $(BUILD)
	@convert $< $@
	
$(ROMFS_PNG): $(ROMFS)/%.rgba.zst: $(BUILD)/%.rgba
	@zstd -f $< -o $@ --ultra -22

$(ROMFS_ASTC): $(ROMFS)/%.astc.zst: $(GRAPHICS)/%.astc
	@zstd -f $< -o $@ --ultra -22

$(ROMFS_SHADERS)/%_vsh.dksh: %_vsh.glsl
	@echo {vert} $(notdir $<)
	@uam -s vert -o $@ $<

$(ROMFS_SHADERS)/%_tcsh.dksh: %_tcsh.glsl
	@echo {tess_ctrl} $(notdir $<)
	@uam -s tess_ctrl -o $@ $<

$(ROMFS_SHADERS)/%_tesh.dksh: %_tesh.glsl
	@echo {tess_eval} $(notdir $<)
	@uam -s tess_eval -o $@ $<

$(ROMFS_SHADERS)/%_gsh.dksh: %_gsh.glsl
	@echo {geom} $(notdir $<)
	@uam -s geom -o $@ $<

$(ROMFS_SHADERS)/%_fsh.dksh: %_fsh.glsl
	@echo {frag} $(notdir $<)
	@uam -s frag -o $@ $<

$(ROMFS_SHADERS)/%.dksh: %.glsl
	@echo {comp} $(notdir $<)
	@uam -s comp -o $@ $<

endif

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
ifeq ($(strip $(APP_JSON)),)
	@$(RM) -r $(BUILD) $(ROMFS)/*.zst $(ROMFS_FOLDERS) $(TARGET).nro $(TARGET).nacp $(TARGET).elf
else
	@$(RM) -r $(BUILD) $(ROMFS_FOLDERS) $(TARGET).nsp $(TARGET).nso $(TARGET).npdm $(TARGET).elf
endif


#---------------------------------------------------------------------------------
else
.PHONY:	all

DEPENDS	:=	$(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
ifeq ($(strip $(APP_JSON)),)

all	:	$(OUTPUT).nro

ifeq ($(strip $(NO_NACP)),)
$(OUTPUT).nro	:	$(OUTPUT).elf $(OUTPUT).nacp $(ROMFS_DEPS)
else
$(OUTPUT).nro	:	$(OUTPUT).elf $(ROMFS_DEPS)
endif

else

all	:	$(OUTPUT).nsp

$(OUTPUT).nsp	:	$(OUTPUT).nso $(OUTPUT).npdm

$(OUTPUT).nso	:	$(OUTPUT).elf

endif

$(OUTPUT).elf	:	$(OFILES)

$(OFILES)		:	$(TOPDIR)/Makefile $(TOPDIR)/Makefile.switch

$(OFILES_SRC)	:	$(HFILES_BIN)

#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o	%_bin.h :	%.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	@$(bin2o)

-include $(DEPENDS)

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