ifeq ($(OS),Windows_NT)
	CLOCK_SRC := src/platform/clock/win32.c
else
	CLOCK_SRC := src/platform/clock/posix.c
endif

include config.mk

ifeq ($(OS),Windows_NT)
	SHELL              := cmd.exe
	GL_LIB             := -lopengl32
	LDFLAGS_PLAT       :=
	CFLAGS_PLAT        :=
	SKELE_INC          := -I"C:/mingw64/include"
	SKELE_LIB          := -L"C:/mingw64/lib"
	CLIENT_BIN         := $(GAME_NAME)_client.exe
	GLCLIENT_BIN       := $(GAME_NAME)_glclient.exe
	SERVER_BIN         := $(GAME_NAME)_server.exe
	MKDIR = if not exist $(subst /,\,$(1)) mkdir $(subst /,\,$(1))
	RMDIR = if exist $(subst /,\,$(1)) rd /s /q $(subst /,\,$(1))
else ifeq ($(shell uname),FreeBSD)
	GL_LIB             := -lGL
	LDFLAGS_PLAT       := -L/usr/local/lib
	CFLAGS_PLAT        := -I/usr/local/include
	SKELE_INC          :=
	SKELE_LIB          :=
	CLIENT_BIN         := $(GAME_NAME)_client
	GLCLIENT_BIN       := $(GAME_NAME)_glclient
	SERVER_BIN         := $(GAME_NAME)_server
	MKDIR = mkdir -p $(1)
	RMDIR = rm -rf $(1)
else
	GL_LIB             := -lGL
	LDFLAGS_PLAT       :=
	CFLAGS_PLAT        :=
	SKELE_INC          :=
	SKELE_LIB          :=
	CLIENT_BIN         := $(GAME_NAME)_client
	GLCLIENT_BIN       := $(GAME_NAME)_glclient
	SERVER_BIN         := $(GAME_NAME)_server
	MKDIR = mkdir -p $(1)
	RMDIR = rm -rf $(1)
endif

# linking
ifeq ($(LINK_TYPE),dynamic)
	LINK_SKELE    := -lskele
	LINK_GLSKELE  := -lglskele
	LINK_SKELESRV := -lskeleserver
	LINK_STK      := -lstk
else
	LINK_SKELE    := -Wl,-Bstatic -lskele    -Wl,-Bdynamic
	LINK_GLSKELE  := -Wl,-Bstatic -lglskele  -Wl,-Bdynamic
	LINK_SKELESRV := -Wl,-Bstatic -lskeleserver -Wl,-Bdynamic
	LINK_STK      := -Wl,-Bstatic -lstk      -Wl,-Bdynamic
endif

RELEASE_LDFLAGS := -s
CFLAGS_BASE     := -Wall -Wpedantic -I$(INC_DIR) -Iskele/include $(SKELE_INC) \
                   -std=c99 $(CFLAGS_PLAT) $(DEBUG_FLAGS)

SOFT_CLIENT_SRCS := src/client/main.c
GL_CLIENT_SRCS   := src/gl_client/main.c
SERVER_SRCS      := src/server/main.c

ALL_SOFT_SRCS    := $(GAME_SRCS) $(SOFT_CLIENT_SRCS)
ALL_GL_SRCS      := $(GAME_SRCS) $(GL_CLIENT_SRCS)
ALL_SERVER_SRCS  := $(GAME_SRCS) $(SERVER_SRCS)

SOFT_DEBUG_OBJS   := $(ALL_SOFT_SRCS:%.c=obj/debug/soft/%.o)
GL_DEBUG_OBJS     := $(ALL_GL_SRCS:%.c=obj/debug/gl/%.o)
SERVER_DEBUG_OBJS := $(ALL_SERVER_SRCS:%.c=obj/debug/server/%.o)

SOFT_RELEASE_OBJS   := $(ALL_SOFT_SRCS:%.c=obj/release/soft/%.o)
GL_RELEASE_OBJS     := $(ALL_GL_SRCS:%.c=obj/release/gl/%.o)
SERVER_RELEASE_OBJS := $(ALL_SERVER_SRCS:%.c=obj/release/server/%.o)

PREFIX ?= /usr
MODE   ?= debug

.PHONY: all debug release client glclient server \
        install uninstall clean run run_gl

all: debug

debug: \
	$(BIN_DIR)/debug/$(CLIENT_BIN) \
	$(BIN_DIR)/debug/$(GLCLIENT_BIN) \
	$(BIN_DIR)/debug/$(SERVER_BIN)

release: \
	$(BIN_DIR)/release/$(CLIENT_BIN) \
	$(BIN_DIR)/release/$(GLCLIENT_BIN) \
	$(BIN_DIR)/release/$(SERVER_BIN)

client:   $(BIN_DIR)/debug/$(CLIENT_BIN)
glclient: $(BIN_DIR)/debug/$(GLCLIENT_BIN)
server:   $(BIN_DIR)/debug/$(SERVER_BIN)

run: client
	$(BIN_DIR)/debug/$(CLIENT_BIN)

run_gl: glclient
	$(BIN_DIR)/debug/$(GLCLIENT_BIN)

$(BIN_DIR)/debug/$(CLIENT_BIN): $(SOFT_DEBUG_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) -o $@ $^ $(SKELE_LIB) $(LINK_SKELE) $(LINK_STK) -lSDL3 $(LDFLAGS_PLAT)

$(BIN_DIR)/debug/$(GLCLIENT_BIN): $(GL_DEBUG_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) -o $@ $^ $(SKELE_LIB) $(LINK_GLSKELE) $(LINK_STK) -lSDL3 $(GL_LIB) $(LDFLAGS_PLAT)

$(BIN_DIR)/debug/$(SERVER_BIN): $(SERVER_DEBUG_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) -o $@ $^ $(SKELE_LIB) $(LINK_SKELESRV) $(LINK_STK) $(LDFLAGS_PLAT)

$(BIN_DIR)/release/$(CLIENT_BIN): $(SOFT_RELEASE_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) $(RELEASE_LDFLAGS) -o $@ $^ $(SKELE_LIB) $(LINK_SKELE) $(LINK_STK) -lSDL3 $(LDFLAGS_PLAT)

$(BIN_DIR)/release/$(GLCLIENT_BIN): $(GL_RELEASE_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) $(RELEASE_LDFLAGS) -o $@ $^ $(SKELE_LIB) $(LINK_GLSKELE) $(LINK_STK) -lSDL3 $(GL_LIB) $(LDFLAGS_PLAT)

$(BIN_DIR)/release/$(SERVER_BIN): $(SERVER_RELEASE_OBJS)
	@$(call MKDIR,$(@D))
	$(CC) $(RELEASE_LDFLAGS) -o $@ $^ $(SKELE_LIB) $(LINK_SKELESRV) $(LINK_STK) $(LDFLAGS_PLAT)

obj/debug/soft/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -g -O0 -MMD -MP -c $< -o $@

obj/debug/gl/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -g -O0 -MMD -MP -c $< -o $@

obj/debug/server/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -g -O0 -MMD -MP -c $< -o $@

obj/release/soft/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -O2 -MMD -MP -c $< -o $@

obj/release/gl/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -O2 -MMD -MP -c $< -o $@

obj/release/server/%.o: %.c
	@$(call MKDIR,$(@D))
	$(CC) $(CFLAGS_BASE) -O2 -MMD -MP -c $< -o $@

-include $(wildcard obj/debug/soft/*.d)
-include $(wildcard obj/debug/gl/*.d)
-include $(wildcard obj/debug/server/*.d)
-include $(wildcard obj/release/soft/*.d)
-include $(wildcard obj/release/gl/*.d)
-include $(wildcard obj/release/server/*.d)

install:
	install -d $(PREFIX)/bin
	install -m 755 $(BIN_DIR)/release/$(CLIENT_BIN)   $(PREFIX)/bin/$(CLIENT_BIN)
	install -m 755 $(BIN_DIR)/release/$(GLCLIENT_BIN) $(PREFIX)/bin/$(GLCLIENT_BIN)
	install -m 755 $(BIN_DIR)/release/$(SERVER_BIN)   $(PREFIX)/bin/$(SERVER_BIN)

uninstall:
	rm -f $(PREFIX)/bin/$(CLIENT_BIN)
	rm -f $(PREFIX)/bin/$(GLCLIENT_BIN)
	rm -f $(PREFIX)/bin/$(SERVER_BIN)

clean:
	@$(call RMDIR,$(OBJ_DIR))
	@$(call RMDIR,$(BIN_DIR))