NATIVE_LINUX ?= 0
ENABLE_MULTIPLAYER ?= 0
ENABLE_LOBBY ?= 1
HOSTCC ?= cc

ifeq ($(NATIVE_LINUX),1)
PREFIX :=
else
PREFIX := i686-w64-mingw32-
endif
OBJCOPY := $(PREFIX)objcopy
CC := $(PREFIX)gcc
AS := $(PREFIX)as
WINDRES := $(PREFIX)windres

SDL_DIR := /usr/i686-w64-mingw32
ASM_PSEUDO_OP_CONV := sed -e 's/\.4byte/\.int/g;s/\.2byte/\.short/g'
#FIX_UNDERSCORE is required for 32 bit windows
ifeq ($(NATIVE_LINUX),1)
FIX_UNDERSCORE := true
else
FIX_UNDERSCORE := $(OBJCOPY) --prefix-symbol _
endif

export CPP := $(PREFIX)cpp
export LD := $(PREFIX)ld

ifeq ($(OS),Windows_NT)
EXE := .exe
else
EXE :=
endif

all: rom

TITLE       := POKEMON EMER
GAME_CODE   := BPEE
MAKER_CODE  := 01
REVISION    := 0
MODERN      := 1
TARGET_PLATFORM := PLATFORM_SDL2
TILE_RENDERER := RENDERER_EASY_DRAW

SHELL := /bin/bash -o pipefail

ifeq ($(NATIVE_LINUX),1)
ELF = pokeemerald.elf
else
ELF = $(ROM:.exe=.elf)
endif
MAP = $(ROM:.exe=.map)

C_SUBDIR = src
GFLIB_SUBDIR = gflib
ASM_SUBDIR = asm
DATA_SRC_SUBDIR = src/data
DATA_ASM_SUBDIR = data
SONG_SUBDIR = sound/songs
MID_SUBDIR = sound/songs/midi

C_BUILDDIR = $(OBJ_DIR)/$(C_SUBDIR)
GFLIB_BUILDDIR = $(OBJ_DIR)/$(GFLIB_SUBDIR)
ASM_BUILDDIR = $(OBJ_DIR)/$(ASM_SUBDIR)
DATA_ASM_BUILDDIR = $(OBJ_DIR)/$(DATA_ASM_SUBDIR)
SONG_BUILDDIR = $(OBJ_DIR)/$(SONG_SUBDIR)
MID_BUILDDIR = $(OBJ_DIR)/$(MID_SUBDIR)

ASFLAGS := --32 --defsym MODERN=$(MODERN) --defsym PORTABLE=1 --defsym UBFIX=1

GCC_VER := $(shell $(CC) -dumpversion)

CC1 	:= $(shell $(PREFIX)gcc --print-prog-name=cc1) -quiet
override CFLAGS += -Wno-trigraphs -Wimplicit -Wparentheses -Wunused -m32 -std=gnu99 -fno-dce -fno-builtin -Wno-unused-function -DPORTABLE -DNONMATCHING -D UBFIX -DMODERN=$(MODERN)
ifeq ($(NATIVE_LINUX),1)
override CFLAGS += -fno-pie
ROM := pokeemerald
OBJ_DIR := build/linux
ifeq ($(ENABLE_MULTIPLAYER),1)
OBJ_DIR := build/linux-multiplayer
endif
else
override CFLAGS += -fleading-underscore
ROM := pokeemerald.exe
OBJ_DIR := build/pc
endif

CPPFLAGS := -std=gnu99 -iquote include -iquote src -iquote $(GFLIB_SUBDIR) -Wno-trigraphs -D NONMATCHING -D PORTABLE -D $(TARGET_PLATFORM) -D $(TILE_RENDERER) -D MODERN=$(MODERN) -D UBFIX -D ENABLE_MULTIPLAYER=$(ENABLE_MULTIPLAYER)
ifeq ($(NATIVE_LINUX),1)
CPPFLAGS += -m32 -D NATIVE_LINUX $(shell pkg-config --cflags sdl2 SDL2_image)
else
CPPFLAGS += -I$(SDL_DIR)/include -L$(SDL_DIR)/lib
endif

ifneq ($(findstring -DDEBUG_MP,$(CFLAGS)),)
CPPFLAGS += -DDEBUG_MP
endif

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

PLATFORM_INCLUDES := 

ifeq ($(NATIVE_LINUX),1)
PLATFORM_INCLUDES += $(shell pkg-config --libs SDL2_image) -lm -lGL -lGLU $(shell pkg-config --libs sdl2)
ifeq ($(ENABLE_MULTIPLAYER),1)
PLATFORM_INCLUDES += -pthread
endif
else
# Windows only
ifneq ($(NO_STD_LIB),1)
	PLATFORM_INCLUDES += -lmingw32
endif

ifeq ($(TARGET_PLATFORM), PLATFORM_SDL2)
	PLATFORM_INCLUDES += -lSDL2main -lSDL2.dll
endif
	
ifeq ($(TARGET_PLATFORM), PLATFORM_WIN32)
	ifeq ($(NO_STD_LIB),1) 
		PLATFORM_INCLUDES += -Wl,-e__main -nostdlib
		CPPFLAGS += -D NO_STD_LIB_ENABLED
	endif
	PLATFORM_INCLUDES += -lkernel32 -luser32 -lgdi32
endif
endif

LIB := $(LIBPATH) -lgcc -lc

AUTO_GEN_TARGETS :=
include make_tools.mk

SHA1 := $(shell { command -v sha1sum || command -v shasum; } 2>/dev/null) -c
GFX := $(TOOLS_DIR)/gbagfx/gbagfx$(EXE)
AIF := $(TOOLS_DIR)/aif2pcm/aif2pcm$(EXE)
MID := $(TOOLS_DIR)/mid2agb/mid2agb$(EXE)
SCANINC := $(TOOLS_DIR)/scaninc/scaninc$(EXE)
PREPROC := $(TOOLS_DIR)/preproc/preproc$(EXE)
RAMSCRGEN := $(TOOLS_DIR)/ramscrgen/ramscrgen$(EXE)
FIX := $(TOOLS_DIR)/gbafix/gbafix$(EXE)
MAPJSON := $(TOOLS_DIR)/mapjson/mapjson$(EXE)
JSONPROC := $(TOOLS_DIR)/jsonproc/jsonproc$(EXE)

MAKEFLAGS += --no-print-directory

# 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:

.PHONY: all rom linux server net-tests lobby-tests clean compare tidy mostlyclean libagbsyscall modern tidymodern tidynonmodern

server: pe-multiplayer-server

SERVER_LOBBY_SRC := $(if $(filter 1,$(ENABLE_LOBBY)),server/src/lobby.c,)
pe-multiplayer-server: server/src/main.c server/src/session.c server/src/save.c src/platform/net/net_framing.c $(SERVER_LOBBY_SRC)
	$(HOSTCC) -std=gnu99 -O2 -Wall -Wextra -pthread -DENABLE_LOBBY=$(ENABLE_LOBBY) -iquote include -iquote src/platform/net -iquote server/include $^ -o $@

net-tests: tests/net/test_net.c src/platform/net/net_framing.c src/platform/net/net_queue.c
	$(HOSTCC) -std=gnu99 -O2 -Wall -Wextra -Werror -iquote include -iquote src/platform/net $^ -o /tmp/pe-net-tests
	/tmp/pe-net-tests

lobby-tests: tests/net/test_lobby.c server/src/lobby.c
	$(HOSTCC) -std=gnu99 -O2 -Wall -Wextra -Werror -iquote include -iquote server/include $^ -o /tmp/pe-lobby-tests
	/tmp/pe-lobby-tests

linux:
	$(MAKE) -f Makefile_pc NATIVE_LINUX=1 rom

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

# Build tools when building the rom
# Disable dependency scanning for clean/tidy/tools
# Use a separate minimal makefile for speed
# Since we don't need to reload most of this makefile
ifeq (,$(filter-out all rom compare modern libagbsyscall syms,$(MAKECMDGOALS)))
$(call infoshell, $(MAKE) -f make_tools.mk)
$(call infoshell, $(MAKE) generated)
else
NODEP ?= 1
endif

# Build tools when building the rom
# Disable dependency scanning for clean/tidy/tools
ifeq (,$(filter-out all rom compare modern,$(MAKECMDGOALS)))
$(call infoshell, $(MAKE) tools)
else
NODEP := 1
endif

C_SRCS_IN := $(wildcard $(C_SUBDIR)/*.c $(C_SUBDIR)/*/*.c $(C_SUBDIR)/*/*/*.c)
NET_SRCS := $(wildcard $(C_SUBDIR)/platform/net/*.c $(C_SUBDIR)/platform/net/generated/*.c)
LAUNCHER_SRCS := $(wildcard $(C_SUBDIR)/launcher/*.c)
C_SRCS_IN := $(filter-out $(NET_SRCS) $(LAUNCHER_SRCS),$(C_SRCS_IN))
ifeq ($(ENABLE_MULTIPLAYER),1)
ifneq ($(NATIVE_LINUX),1)
$(error ENABLE_MULTIPLAYER=1 is currently supported only with NATIVE_LINUX=1)
endif
C_SRCS_IN += $(filter-out $(C_SUBDIR)/platform/net/net_disabled.c,$(wildcard $(C_SUBDIR)/platform/net/*.c))
C_SRCS_IN += $(LAUNCHER_SRCS)
else
C_SRCS_IN += $(C_SUBDIR)/platform/net/net_disabled.c
C_SRCS_IN += $(C_SUBDIR)/platform/net/net_party.c
endif
C_SRCS := $(foreach src,$(C_SRCS_IN),$(if $(findstring .inc.c,$(src)),,$(src)))
C_OBJS := $(patsubst $(C_SUBDIR)/%.c,$(C_BUILDDIR)/%.o,$(C_SRCS))

GFLIB_SRCS := $(wildcard $(GFLIB_SUBDIR)/*.c)
GFLIB_OBJS := $(patsubst $(GFLIB_SUBDIR)/%.c,$(GFLIB_BUILDDIR)/%.o,$(GFLIB_SRCS))

C_ASM_SRCS += $(wildcard $(C_SUBDIR)/*.s $(C_SUBDIR)/*/*.s $(C_SUBDIR)/*/*/*.s)
C_ASM_OBJS := $(patsubst $(C_SUBDIR)/%.s,$(C_BUILDDIR)/%.o,$(C_ASM_SRCS))

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

# get all the data/*.s files EXCEPT the ones with specific rules
REGULAR_DATA_ASM_SRCS := $(filter-out $(DATA_ASM_SUBDIR)/maps.s $(DATA_ASM_SUBDIR)/map_events.s, $(wildcard $(DATA_ASM_SUBDIR)/*.s))

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

SONG_SRCS := $(wildcard $(SONG_SUBDIR)/*.s)
SONG_OBJS := $(patsubst $(SONG_SUBDIR)/%.s,$(SONG_BUILDDIR)/%.o,$(SONG_SRCS))

MID_SRCS := $(wildcard $(MID_SUBDIR)/*.mid)
MID_OBJS := $(patsubst $(MID_SUBDIR)/%.mid,$(MID_BUILDDIR)/%.o,$(MID_SRCS))
BACKGROUND_PNGS := BG.png $(sort $(wildcard BG[0-9].png BG[0-9][0-9].png))
BACKGROUND_BMPS := $(patsubst %.png,%.bmp,$(BACKGROUND_PNGS))

OBJS     := $(C_OBJS) $(GFLIB_OBJS) $(ASM_OBJS) $(DATA_ASM_OBJS) $(SONG_OBJS) $(MID_OBJS)
ifneq ($(NATIVE_LINUX),1)
WINDOWS_RESOURCE_OBJ := $(OBJ_DIR)/pokemon_emerald_icon.o
OBJS += $(WINDOWS_RESOURCE_OBJ)
WINDOWS_BORDER := $(BACKGROUND_BMPS) Border.bmp
endif
OBJS_REL := $(patsubst $(OBJ_DIR)/%,%,$(OBJS))

SUBDIRS  := $(sort $(dir $(OBJS)))

$(shell mkdir -p $(SUBDIRS))

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

# For contributors to make sure a change didn't affect the contents of the ROM.
compare: ; @$(MAKE) COMPARE=1

clean: mostlyclean clean-tools

mostlyclean: tidy
	rm -f $(SAMPLE_SUBDIR)/*.bin
	rm -f $(CRY_SUBDIR)/*.bin
	rm -f $(MID_SUBDIR)/*.s
	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 $(DATA_ASM_SUBDIR)/layouts/layouts.inc $(DATA_ASM_SUBDIR)/layouts/layouts_table.inc
	rm -f $(DATA_ASM_SUBDIR)/maps/connections.inc $(DATA_ASM_SUBDIR)/maps/events.inc $(DATA_ASM_SUBDIR)/maps/groups.inc $(DATA_ASM_SUBDIR)/maps/headers.inc
	find $(DATA_ASM_SUBDIR)/maps \( -iname 'connections.inc' -o -iname 'events.inc' -o -iname 'header.inc' \) -exec rm {} +
	rm -f $(AUTO_GEN_TARGETS)

tidy:
	rm -f $(ROM)$(EXE) $(ELF) $(MAP)
	rm -r $(OBJ_DIR)
ifeq ($(MODERN),0)
	@$(MAKE) tidy MODERN=1
endif

clean-platform:
	rm -f $(ROM)$(EXE) $(ELF) $(MAP)
	rm -r $(OBJ_DIR)/src/platform

clean-generated:
	-rm -f $(AUTO_GEN_TARGETS)
	@rm -f $(AUTO_GEN_TARGETS)
	@echo "rm -f <AUTO_GEN_TARGETS>"

include graphics_file_rules.mk
include map_data_rules.mk
include spritesheet_rules.mk
include json_data_rules.mk
include audio_rules.mk

generated: $(AUTO_GEN_TARGETS)

%.s: ;
%.png: ;
%.pal: ;
%.aif: ;

%.1bpp: %.png  ; $(GFX) $< $@
%.4bpp: %.png  ; $(GFX) $< $@
%.8bpp: %.png  ; $(GFX) $< $@
%.gbapal: %.pal ; $(GFX) $< $@
%.gbapal: %.png ; $(GFX) $< $@
%.lz: % ; $(GFX) $< $@
%.rl: % ; $(GFX) $< $@

ifeq ($(NODEP),1)
$(C_BUILDDIR)/%.o: c_dep :=
else
$(C_BUILDDIR)/%.o: c_dep = $(shell [[ -f $(C_SUBDIR)/$*.c ]] && $(SCANINC) -I include -I $(TOOLS_DIR)/agbcc/include -I gflib $(C_SUBDIR)/$*.c)
endif

ifeq ($(DINFO),1)
override CFLAGS += -g3 -O0 -fno-omit-frame-pointer 
else
override CFLAGS += -O3
endif

$(C_BUILDDIR)/%.o : $(C_SUBDIR)/%.c $$(c_dep)
	@$(CPP) $(CPPFLAGS) $< -o $(C_BUILDDIR)/$*.i
ifeq ($(NATIVE_LINUX),1)
	@$(PREPROC) $(C_BUILDDIR)/$*.i charmap.txt | $(CC) $(CFLAGS) -S -x cpp-output -o $(C_BUILDDIR)/$*.s -
else
	@$(PREPROC) $(C_BUILDDIR)/$*.i charmap.txt | $(CC1) $(CFLAGS) -o $(C_BUILDDIR)/$*.s
endif
	@echo -e ".text\n\t.align\t2, 0\n" >> $(C_BUILDDIR)/$*.s
	$(AS) $(ASFLAGS) -o $@ $(C_BUILDDIR)/$*.s

ifeq ($(NODEP),1)
$(GFLIB_BUILDDIR)/%.o: c_dep :=
else
$(GFLIB_BUILDDIR)/%.o: c_dep = $(shell [[ -f $(GFLIB_SUBDIR)/$*.c ]] && $(SCANINC) -I include -I $(TOOLS_DIR)/agbcc/include -I gflib $(GFLIB_SUBDIR)/$*.c)
endif

$(GFLIB_BUILDDIR)/%.o : $(GFLIB_SUBDIR)/%.c $$(c_dep)
	@$(CPP) $(CPPFLAGS) $< -o $(GFLIB_BUILDDIR)/$*.i
ifeq ($(NATIVE_LINUX),1)
	@$(PREPROC) $(GFLIB_BUILDDIR)/$*.i charmap.txt | $(CC) $(CFLAGS) -S -x cpp-output -o $(GFLIB_BUILDDIR)/$*.s -
else
	@$(PREPROC) $(GFLIB_BUILDDIR)/$*.i charmap.txt | $(CC1) $(CFLAGS) -o $(GFLIB_BUILDDIR)/$*.s
endif
	@echo -e ".text\n\t.align\t2, 0\n" >> $(GFLIB_BUILDDIR)/$*.s
	$(AS) $(ASFLAGS) -o $@ $(GFLIB_BUILDDIR)/$*.s

# The dep rules have to be explicit or else missing files won't be reported.
# As a side effect, they're evaluated immediately instead of when the rule is invoked.
# It doesn't look like $(shell) can be deferred so there might not be a better way.


ifeq ($(NODEP),1)
$(ASM_BUILDDIR)/%.o: $(ASM_SUBDIR)/%.s
	$(AS) $(ASFLAGS) -o $@ $<
	$(FIX_UNDERSCORE) $@
else
define ASM_DEP
$1: $2 $$(shell $(SCANINC) -I include -I "" $2)
	$$(AS) $$(ASFLAGS) -o $$@ $$<
	$(FIX_UNDERSCORE) $$@
endef
$(foreach src, $(ASM_SRCS), $(eval $(call ASM_DEP,$(patsubst $(ASM_SUBDIR)/%.s,$(ASM_BUILDDIR)/%.o, $(src)),$(src))))
endif

ifeq ($(NODEP),1)
$(DATA_ASM_BUILDDIR)/%.o: $(DATA_ASM_SUBDIR)/%.s
	$(PREPROC) $< charmap.txt | $(CPP) -I include | $(PREPROC) -ie $$< charmap.txt | $(ASM_PSEUDO_OP_CONV) | $(AS) $(ASFLAGS) -o $@
	$(FIX_UNDERSCORE) $@
else
define DATA_ASM_DEP
$1: $2 $$(shell $(SCANINC) -I include -I "" $2)
	$$(PREPROC) $$< charmap.txt | $$(CPP) -I include | $$(PREPROC) -ie $$< charmap.txt | $$(ASM_PSEUDO_OP_CONV) | $$(AS) $$(ASFLAGS) -o $$@
	$$(FIX_UNDERSCORE) $$@
endef
$(foreach src, $(REGULAR_DATA_ASM_SRCS), $(eval $(call DATA_ASM_DEP,$(patsubst $(DATA_ASM_SUBDIR)/%.s,$(DATA_ASM_BUILDDIR)/%.o, $(src)),$(src))))
$(foreach src, $(C_ASM_SRCS), $(eval $(call DATA_ASM_DEP,$(patsubst $(C_SUBDIR)/%.s,$(C_BUILDDIR)/%.o, $(src)),$(src))))
endif

$(SONG_BUILDDIR)/%.o: $(SONG_SUBDIR)/%.s
	$(ASM_PSEUDO_OP_CONV) $< | $(AS) $(ASFLAGS) -I sound -o $@
	$(FIX_UNDERSCORE) $@

$(OBJ_DIR)/sym_bss.ld: sym_bss.txt
	$(RAMSCRGEN) .bss $< ENGLISH > $@

$(OBJ_DIR)/sym_common.ld: sym_common.txt $(C_OBJS) $(wildcard common_syms/*.txt)
	$(RAMSCRGEN) COMMON $< ENGLISH -c $(C_BUILDDIR),common_syms > $@

$(OBJ_DIR)/sym_ewram.ld: sym_ewram.txt
	$(RAMSCRGEN) ewram_data $< ENGLISH > $@

LD_SCRIPT := ld_script_pc.ld
LD_SCRIPT_DEPS := 

$(OBJ_DIR)/ld_script.ld: $(LD_SCRIPT) $(LD_SCRIPT_DEPS)
	cd $(OBJ_DIR) && sed "s#tools/#../../tools/#g" ../../$(LD_SCRIPT) > ld_script.ld

$(OBJ_DIR)/pokemon_emerald_icon.o: resources/pokemon_emerald.rc resources/pokemon_emerald.ico
	$(WINDRES) $< -O coff -o $@

BG%.bmp: BG%.png
	magick $< -define bmp:format=bmp4 $@

Border.bmp: Border.png
	magick $< -define bmp:format=bmp4 $@

$(ELF): $(OBJ_DIR)/ld_script.ld $(OBJS)
	cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ld_script.ld -o ../../$@ $(OBJS_REL) $(LIB)
	$(FIX) $@ -t"$(TITLE)" -c$(GAME_CODE) -m$(MAKER_CODE) -r$(REVISION) --silent

$(ROM): $(OBJS) $(WINDOWS_BORDER)
ifeq ($(NATIVE_LINUX),1)
	$(CC) $(CFLAGS) -no-pie -Wl,--demangle  $(OBJS) $(PLATFORM_INCLUDES) -o $@
else
	$(CC) $(CFLAGS) -Wl,--demangle $(OBJS) -static-libgcc -L$(SDL_DIR)/lib $(PLATFORM_INCLUDES) -lwinmm -lxinput -o $@
endif
