TARGET_EXEC := smokey

CFLAGS   := $(shell sed 's|//.*||' compile_flags.txt)
LD_FLAGS := -lglfw

SRC_DIR   := src
BUILD_DIR := out

SRCS_NOMAIN := $(shell find $(SRC_DIR) -name '*.c' ! -name 'main.c')
SRCS := $(SRCS_NOMAIN) $(DEPS) $(SRC_DIR)/main.c
OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
DEPS := $(OBJS:.o=.d)

INC_DIRS  := $(shell find $(SRC_DIR) -type d)
INC_FLAGS := -MMD -MP $(addprefix -I,$(INC_DIRS))

THIRDPARTY_DIR  := deps
THIRDPARTY_SRCS := $(shell find $(THIRDPARTY_DIR) -name '*.c')
THIRDPARTY_OBJS := $(THIRDPARTY_SRCS:%=$(BUILD_DIR)/%.o)
THIRDPARTY_DEPS := $(THIRDPARTY_OBJS:.o=.d)

TEST_DIR   := test
TEST_SRCS  := $(shell find $(TEST_DIR) -name '*.test.c')
TEST_OBJS  := $(SRCS_NOMAIN:%=$(BUILD_DIR)/%.o)
TEST_EXECS := $(TEST_SRCS:%.c=$(BUILD_DIR)/%)

TEST_INC_DIRS  := $(shell find $(TEST_DIR) -type d)
TEST_INC_FLAGS := -MMD -MP $(addprefix -I,$(TEST_INC_DIRS))


all: build

build: $(TARGET_EXEC)

$(TARGET_EXEC): $(THIRDPARTY_OBJS) $(OBJS)
	$(CC) $(CFLAGS) $(LD_FLAGS) $(THIRDPARTY_OBJS) $(OBJS) -o $@

$(BUILD_DIR)/$(THIRDPARTY_DIR)/%.c.o: $(THIRDPARTY_DIR)/%.c
	mkdir -p $(dir $@)
	$(CC) -c $< -o $@

$(BUILD_DIR)/%.c.o: %.c
	mkdir -p $(dir $@)
	$(CC) $(CFLAGS) $(INC_FLAGS) -c $< -o $@


run-tests: build-tests
	for exec in $(TEST_EXECS); do ./$$exec; done

build-tests: $(TEST_EXECS)

$(BUILD_DIR)/$(TEST_DIR)/%.test: $(BUILD_DIR)/$(TEST_DIR)/%.test.c.o $(TEST_OBJS)
	$(CC) $(CFLAGS) $(LD_FLAGS) $^ -o $@

$(BUILD_DIR)/$(TEST_DIR)/%.test.c.o: $(TEST_DIR)/%.c
	mkdir -p $(dir $@)
	$(CC) $(CFLAGS) $(TEST_INC_FLAGS) -c $< -o $@


clean:
	-$(RM) -rdf $(TARGET_EXEC) $(BUILD_DIR)

.PHONY: all build run-tests build-tests clean

-include $(DEPS) $(THIRDPARTY_DEPS)