include config.mk

ifeq ($(OS),Windows_NT)
    SHELL := cmd.exe
    STATIC_LIB := lib$(LIB_NAME).a
    CFLAGS_PLAT :=
    MKDIR = if not exist $(subst /,\,$(1)) mkdir $(subst /,\,$(1))
    RMDIR = if exist $(subst /,\,$(1)) rd /s /q $(subst /,\,$(1))
    TOOL_EXT := .exe
else
    STATIC_LIB := lib$(LIB_NAME).a
    CFLAGS_PLAT :=
    MKDIR = mkdir -p $(1)
    RMDIR = rm -rf $(1)
    TOOL_EXT :=
endif

RELEASE_LDFLAGS := -s
CFLAGS_BASE := -Wall -Wpedantic -I$(INC_DIR) -std=c89 $(CFLAGS_PLAT)

PREFIX ?= /usr
LIBDIR ?= $(PREFIX)/lib
INCDIR ?= $(PREFIX)/include

TOOL_DEBUG_BINS   := $(TOOL_SRCS:tools/%.c=$(BIN_DIR)/debug/tools/%$(TOOL_EXT))
TOOL_RELEASE_BINS := $(TOOL_SRCS:tools/%.c=$(BIN_DIR)/release/tools/%$(TOOL_EXT))

.PHONY: all debug release tools clean test install uninstall

all: debug tools

debug: $(BIN_DIR)/debug/$(STATIC_LIB)
release: $(BIN_DIR)/release/$(STATIC_LIB)

tools: $(TOOL_DEBUG_BINS)

$(BIN_DIR)/debug/$(STATIC_LIB): $(SRCS:src/%.c=obj/debug/%.o)
	@$(call MKDIR,$(@D))
	ar rcs $@ $^

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

$(BIN_DIR)/release/$(STATIC_LIB): $(SRCS:src/%.c=obj/release/%.o)
	@$(call MKDIR,$(@D))
	ar rcs $@ $^

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

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

$(BIN_DIR)/debug/tools/%$(TOOL_EXT): obj/debug/tools/%.o $(BIN_DIR)/debug/$(STATIC_LIB)
	@$(call MKDIR,$(@D))
	$(CC) -o $@ $< -L$(BIN_DIR)/debug -l$(LIB_NAME)

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

$(BIN_DIR)/release/tools/%$(TOOL_EXT): obj/release/tools/%.o $(BIN_DIR)/release/$(STATIC_LIB)
	@$(call MKDIR,$(@D))
	$(CC) $(RELEASE_LDFLAGS) -o $@ $< -L$(BIN_DIR)/release -l$(LIB_NAME)

-include $(wildcard obj/debug/*.d)
-include $(wildcard obj/debug/tools/*.d)
-include $(wildcard obj/release/*.d)
-include $(wildcard obj/release/tools/*.d)

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

test: debug
	@echo "=== Building and running fpk tests ==="
	@$(MAKE) -C test -f gmake.mk

ifneq ($(OS),Windows_NT)
install:
	@test -f $(BIN_DIR)/release/$(STATIC_LIB) || { echo "Run 'make -f gmake.mk release' before installing."; exit 1; }
	install -d $(LIBDIR) $(INCDIR)/fpk
	install -m 644 $(BIN_DIR)/release/$(STATIC_LIB) $(LIBDIR)/
	install -m 644 $(INC_DIR)/fpk.h $(INCDIR)/fpk/
	install -m 644 $(INC_DIR)/fpk_version.h $(INCDIR)/fpk/

uninstall:
	rm -f $(LIBDIR)/$(STATIC_LIB)
	rm -rf $(INCDIR)/fpk
else
install:
	@echo "make install is not supported on Windows."
	@echo "Copy include/ directory contents to your_project/include/fpk/"
	@echo "Copy bin/release/libfpk.a to your project's lib directory."

uninstall:
	@echo "make uninstall is not supported on Windows."
endif