CXX        := clang++
CXXFLAGS   := -Wall -Wextra -std=c++17
CC         := clang
CFLAGS     := -Wall -Wextra

INCLUDES   := -I./src/ \
              -I./vendor/glad/include/ \
              -I./vendor/glm/ \
              -I./vendor/imgui/ \
              -I./vendor/imgui/backends/ \
              -I./vendor/stb/ \
              -I./vendor/tinyobjloader/ \

LDFLAGS    := -lglfw -lGL -lm

TARGET     := build/fan

OBJS       := build/camera.o \
              build/framebuffer.o \
              build/loader.o \
              build/main.o \
              build/material.o \
              build/mesh.o \
              build/renderer.o \
              build/scene.o \
              build/shader.o \
              build/texture.o \
              build/transform.o \
              build/utils.o \
              build/window.o \
              build/glad.o \
              build/stb_image.o \
              build/tiny_obj_loader.o \

IMGUI_OBJS := build/imgui.o build/imgui_demo.o build/imgui_draw.o build/imgui_tables.o build/imgui_widgets.o \
              build/imgui_impl_glfw.o build/imgui_impl_opengl3.o

.PHONY: all clean

all: $(TARGET)

$(TARGET): $(OBJS) $(IMGUI_OBJS)
	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDFLAGS)

build/%.o: src/%.cpp
	$(CXX) $(CXXFLAGS) $(INCLUDES) -c $< -o $@

build/glad.o: vendor/glad/src/gl.c
	$(CC) $(CFLAGS) -I./vendor/glad/include/ -c $< -o $@

build/stb_image.o: vendor/stb/stb_image.h
	$(CC) $(CFLAGS) -DSTB_IMAGE_IMPLEMENTATION -xc -c $< -o $@

build/tiny_obj_loader.o: vendor/tinyobjloader/tiny_obj_loader.h
	$(CXX) $(CXXFLAGS) -DTINYOBJLOADER_IMPLEMENTATION -xc++ -c $< -o $@

define imgui_rule
build/$(1): vendor/imgui/$(2)
	$(CXX) $(CXXFLAGS) -I./vendor/imgui/ -c $$< -o $$@
endef

$(eval $(call imgui_rule,imgui.o,imgui.cpp))
$(eval $(call imgui_rule,imgui_demo.o,imgui_demo.cpp))
$(eval $(call imgui_rule,imgui_draw.o,imgui_draw.cpp))
$(eval $(call imgui_rule,imgui_tables.o,imgui_tables.cpp))
$(eval $(call imgui_rule,imgui_widgets.o,imgui_widgets.cpp))
$(eval $(call imgui_rule,imgui_impl_glfw.o,backends/imgui_impl_glfw.cpp))
$(eval $(call imgui_rule,imgui_impl_opengl3.o,backends/imgui_impl_opengl3.cpp))

clean:
	rm -f build/*.o $(TARGET)