# ==============================================================================
# DIRECTORIES
# ==============================================================================
DIR_ROOT       := $(dir $(abspath $(MAKEFILE_LIST)))
DIR_SOURCES    := $(addprefix $(DIR_ROOT), source/)
DIR_BIN        := $(DIR_ROOT)

# ==============================================================================
# TARGET NAMES
# ==============================================================================
ifeq ($(OS),Windows_NT)
    TARGET_NAME    := $(shell powershell -Command "$$line = Get-Content CMakeLists.txt | Where-Object {$$_ -match '^project'}; if ($$line -match 'project\s*\x28(\w+)') { $$matches[1] }")
    LONG_NAME      := $(shell powershell -Command "$$line = Get-Content CMakeLists.txt | Where-Object {$$_ -match 'PROJECT_LONG_NAME'}; if ($$line -match '\"(.+)\"') { $$matches[1] }")
else
    TARGET_NAME    := $(shell awk '/^project/ {gsub(/[)(]/, " "); print $$2}' CMakeLists.txt)
    LONG_NAME      := $(shell grep 'PROJECT_LONG_NAME' CMakeLists.txt | sed 's/.*"\(.*\)".*/\1/')
endif

TARGET_FILE    := $(DIR_BIN)$(TARGET_NAME)
RELEASE_FOLDER := $(TARGET_NAME)_release
RELEASE_FILE   := $(RELEASE_FOLDER)/$(TARGET_NAME)

# ==============================================================================
# VERSION
# ==============================================================================
ifeq ($(OS),Windows_NT)
    VERSION := v$(shell powershell -Command "$$line = Get-Content CMakeLists.txt | Where-Object {$$_ -match '^project'}; if ($$line -match 'VERSION\s+([0-9.]+)') { $$matches[1] }")
else
    VERSION := v$(shell grep "^project" CMakeLists.txt | tr -cd 0-9.)
endif

# ==============================================================================
# SOURCE FILES
# ==============================================================================
APP_SOURCES := \
    source/main.cpp \
    source/sdl_manager.cpp \
    source/joc_asteroides.cpp

# ==============================================================================
# INCLUDES
# ==============================================================================
INCLUDES := -Isource -Ibuild

# ==============================================================================
# COMPILER FLAGS (OS-specific)
# ==============================================================================
CPP_STANDARD := c++20

ifeq ($(OS),Windows_NT)
    # Windows (MinGW)
    FixPath         = $(subst /,\\,$1)
    CXX             := g++
    CXXFLAGS        := -std=$(CPP_STANDARD) -Wall -O2 -ffunction-sections -fdata-sections \
                       -Wl,--gc-sections -static-libstdc++ -static-libgcc \
                       -Wl,-subsystem,windows -DWINDOWS_BUILD
    CXXFLAGS_DEBUG  := -std=$(CPP_STANDARD) -Wall -g -D_DEBUG -DWINDOWS_BUILD
    LDFLAGS         := -lmingw32 -lSDL3
    WINDRES         := windres
    RESOURCE_FILE   := release/asteroids.res
    RM              := del /Q
    RMDIR           := rmdir /S /Q
    MKDIR           := mkdir
else
    # Unix-like systems (Linux/macOS)
    FixPath         = $1
    CXX             := g++
    CXXFLAGS        := -std=$(CPP_STANDARD) -Wall -O2
    CXXFLAGS_DEBUG  := -std=$(CPP_STANDARD) -Wall -g -D_DEBUG
    LDFLAGS         := -lSDL3
    RMFILE          := rm -f
    RMDIR           := rm -rf
    MKDIR           := mkdir -p

    UNAME_S         := $(shell uname -s)
    ifeq ($(UNAME_S),Linux)
        CXXFLAGS    += -DLINUX_BUILD
        CXXFLAGS_DEBUG += -DLINUX_BUILD
    endif
    ifeq ($(UNAME_S),Darwin)
        CXXFLAGS    += -arch arm64 -Wno-deprecated -DMACOS_BUILD
        CXXFLAGS_DEBUG += -arch arm64 -Wno-deprecated -DMACOS_BUILD
    endif
endif

# ==============================================================================
# TARGETS
# ==============================================================================
.PHONY: all clean debug help

# Default target
all: $(TARGET_FILE)

# Compile executable
$(TARGET_FILE): $(APP_SOURCES)
ifeq ($(OS),Windows_NT)
	@if not exist build $(MKDIR) build
	@if not exist release\\asteroids.res $(WINDRES) release\\asteroids.rc -O coff -o release\\asteroids.res
	$(CXX) $(CXXFLAGS) $(INCLUDES) $(APP_SOURCES) $(RESOURCE_FILE) $(LDFLAGS) -o $(TARGET_FILE).exe
else
	@$(MKDIR) build
	$(CXX) $(CXXFLAGS) $(INCLUDES) $(APP_SOURCES) $(LDFLAGS) -o $(TARGET_FILE)
endif
	@echo Compilation successful: $(TARGET_FILE)

# Debug build
debug: $(APP_SOURCES)
ifeq ($(OS),Windows_NT)
	@if not exist build $(MKDIR) build
	$(CXX) $(CXXFLAGS_DEBUG) $(INCLUDES) $(APP_SOURCES) $(LDFLAGS) -o $(TARGET_FILE)_debug.exe
else
	@$(MKDIR) build
	$(CXX) $(CXXFLAGS_DEBUG) $(INCLUDES) $(APP_SOURCES) $(LDFLAGS) -o $(TARGET_FILE)_debug
endif
	@echo Debug build successful: $(TARGET_FILE)_debug

# Clean build artifacts
clean:
ifeq ($(OS),Windows_NT)
	@if exist $(call FixPath,$(TARGET_FILE).exe) $(RM) $(call FixPath,$(TARGET_FILE).exe)
	@if exist $(call FixPath,$(TARGET_FILE)_debug.exe) $(RM) $(call FixPath,$(TARGET_FILE)_debug.exe)
	@if exist build $(RMDIR) build
	@if exist $(RELEASE_FOLDER) $(RMDIR) $(RELEASE_FOLDER)
else
	@$(RMFILE) $(TARGET_FILE)
	@$(RMFILE) $(TARGET_FILE)_debug
	@$(RMDIR) build
	@$(RMDIR) $(RELEASE_FOLDER)
endif
	@echo Clean complete

# Help target
help:
	@echo Available targets:
	@echo   all           - Build the game (default)
	@echo   debug         - Build with debug symbols
	@echo   clean         - Remove build artifacts
	@echo   help          - Show this help message
	@echo.
	@echo Current configuration:
	@echo   Target:       $(TARGET_NAME)
	@echo   Version:      $(VERSION)
	@echo   Platform:     $(UNAME_S)
	@echo   C++ Standard: $(CPP_STANDARD)