# Build folder
BUILD_DIR = build

# Source files
SOURCES = \
  src/main.cpp \
  src/game_data.cpp

# Assets files
ASSETS = \
  assets/player-sheets/player_idle_sheet.png \
  assets/player-sheets/player_run_sheet.png

# Output target name
OUTPUT = 2D_Engine_Casio_Tool

# Compiler and flags
CXX = g++
CXXFLAGS = -std=c++17 -g -I.
LDFLAGS =

# Deduce objects
OBJECTS = $(SOURCES:%.cpp=$(BUILD_DIR)/%.o)
ASSETS_OBJECTS = $(ASSETS:%=$(BUILD_DIR)/%.o)

# Verbose mode
ifeq ($(VERBOSE), 1)
Q :=
else
Q := @
endif

# Colors
GREEN  := \033[0;32m
YELLOW := \033[1;33m
RESET  := \033[0m

# Total number of files to process
TOTAL_FILES := $(shell echo $$(($(words $(SOURCES))+1)))
CURRENT_FILE := 0

# Default targets
all: build_dir $(OUTPUT) end

# Create build directory
build_dir:
	$(Q)mkdir -p $(dir $(OBJECTS)) $(dir $(ASSETS_OBJECTS))

# Link target
$(OUTPUT): $(OBJECTS) $(ASSETS_OBJECTS)
	@echo "[100%] $(YELLOW)Linking $(OUTPUT)$(RESET)"
	$(Q)$(CXX) $(LDFLAGS) -o $@ $(OBJECTS) $(ASSETS_OBJECTS)

# Build .o files from .cpp
$(BUILD_DIR)/%.o: %.cpp
	$(eval CURRENT_FILE := $(shell echo $$(($(CURRENT_FILE)+1))))
	$(eval PERCENTAGE := $(shell echo $$(($(CURRENT_FILE)*100/$(TOTAL_FILES)))))
	@echo "[$(PERCENTAGE)%] $(GREEN)Building $@$(RESET)"
	$(Q)mkdir -p $(dir $@)
	$(Q)$(CXX) $(CXXFLAGS) -MMD -MP -c $< -o $@

# Arch and BFD header version
ARCH := $(shell arch)
BFD_VER := $(shell objcopy --info 2>/dev/null | grep -m1 '^elf')

# Convert .png.o from .png
$(BUILD_DIR)/%.o: %
	fxconv --cg --toolchain= --arch=$(ARCH) --outputtarget=$(BFD_VER) $< -o $@

# Source files dependencies
-include $(OBJECTS:.o=.d)

# Print ending message
end:
	@echo "Built target $(OUTPUT)"

# Clean
.PHONY: clean
clean:
	$(Q)rm -rf $(BUILD_DIR)