# Build folder
BUILD_DIR = build

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

# Assets files
ASSETS := \
  assets/tileset/tileset.png \
  assets/player-sheets/player_idle_sheet.png \
  assets/player-sheets/player_walk_sheet.png \
  assets/player-sheets/player_run_sheet.png \
  assets/props-sheets/barred_door_sheet.png \
  assets/props-sheets/lever_sheet.png \
  assets/props-sheets/small_chest_sheet.png \
  assets/props-sheets/big_chest_sheet.png \
  assets/maps/example.json

# Output target name
OUTPUT := 2D_Engine_Casio_Tool

# Compiler and flags
CXX = ccache g++
CXXFLAGS = -m32 -Wall -Wextra -std=c++17 -g -no-pie
INCLUDE_DIRS = 3rd_party
LDFLAGS = -m32 -no-pie

# Converter flags
FXCONV_FLAGS = --cg --toolchain= --arch=i386 --outputtarget=elf32-x86-64
FXCONV_CONVERTERS = assets/maps/map_converter.py

# Change output location
OUTPUT := $(BUILD_DIR)/$(OUTPUT)

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

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

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

# Current file nb to process
CURRENT_FILE := 0

# Default targets
all: count_build build_dir end

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

# Link target
$(OUTPUT): $(OBJECTS)
	@echo "[100%] $(YELLOW)Linking $(OUTPUT)$(RESET)"
	$(Q)$(CXX) $(LDFLAGS) -o $@ $(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 CXX object $@$(RESET)"
	$(Q)$(CXX) $(CXXFLAGS) $(INCLUDE_DIRS:%=-I%) -MMD -MP -c $< -o $@

# Convert .*.o from .* (png files for example)
$(BUILD_DIR)/%.o: %
	$(eval CURRENT_FILE := $(shell echo $$(($(CURRENT_FILE)+1))))
	$(eval PERCENTAGE := $(shell echo $$(($(CURRENT_FILE)*100/$(TOTAL_FILES)))))
	@echo "[$(PERCENTAGE)%] $(GREEN)Building FXCONV object $@$(RESET)"
	$(Q)fxconv $(FXCONV_FLAGS) --converter=$(FXCONV_CONVERTERS) $< -o $@
	$(Q)objcopy --add-section .note.GNU-stack=/dev/null $@

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

count_build:
	$(eval export TOTAL_FILES := $(shell echo $$(($$(make -n $(OBJECTS) 2>/dev/null | grep -c "Building") + 1))))

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

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