CXX ?= g++

# path #
SRC_PATH = src
BUILD_PATH = build
BIN_PATH = $(BUILD_PATH)/bin

# executable #
BIN_NAME = AA02

# extensions #
SRC_EXT = cpp

# code lists #
# Find all source files in the source directory, sorted by
# most recently modified
# SOURCES = $(shell find $(SRC_PATH) -name '*.$(SRC_EXT)' | sort -k 1nr | cut -f2-)
SOURCES = $(shell find $(SRC_PATH) -name '*.$(SRC_EXT)' -printf '%T@ %p\n' | sort -k 1nr | cut -d ' ' -f 2)

# Set the object file names, with the source directory stripped
# from the path, and the build path prepended in its place
OBJECTS = $(SOURCES:$(SRC_PATH)/%.$(SRC_EXT)=$(BUILD_PATH)/%.o)
# Set the dependency files that will be used to add header dependencies
DEPS = $(OBJECTS:.o=.d)

# flags #
COMPILE_FLAGS = -std=c++17 -Wall -Wextra -g
# Space-separated pkg-config libraries used by this project
LIBS = `pkg-config --cflags --libs sdl2 vulkan`
INCLUDES = -I include/ -I /usr/local/include -I$(VULKAN_SDK)/include

.PHONY: default_target
default_target: release

.PHONY: release
release: export CXXFLAGS := $(CXXFLAGS) $(COMPILE_FLAGS)
release: dirs
        @$(MAKE) all

.PHONY: dirs
dirs:
        @mkdir -p $(dir $(OBJECTS))
        @mkdir -p $(BIN_PATH)

#       @echo "Deleting directories and $(BIN_NAME) symlink"
.PHONY: clean
clean:
        @$(RM) $(BIN_NAME)
        @$(RM) -r $(BUILD_PATH)
        @$(RM) -r $(BIN_PATH)

# checks the executable and symlinks to the output
# @echo "Making symlink: $(BIN_NAME) -> $<"
.PHONY: all
all: $(BIN_PATH)/$(BIN_NAME)
        @$(RM) $(BIN_NAME)
        @ln -s $(BIN_PATH)/$(BIN_NAME) $(BIN_NAME)

# Creation of the executable
# @echo "Linking: $@"
$(BIN_PATH)/$(BIN_NAME): $(OBJECTS)
        $(CXX) $(OBJECTS) $(LIBS) -o $@

# Add dependency files, if they exist
-include $(DEPS)

# Source file rules
# After the first compilation they will be joined with the rules from the
# dependency files to provide header dependencies

#       @echo "Compiling: $< -> $@"
$(BUILD_PATH)/%.o: $(SRC_PATH)/%.$(SRC_EXT)
        $(CXX) $(CXXFLAGS) $(INCLUDES) -MP -MMD -c $< -o $@

run:
        $(MAKE) clean
        +$(MAKE) -j
        ./AA02