# Simplified Makefile for glamac - SDL3 version
# Supports: Linux native, Windows cross-compilation

# Detect OS and set platform-specific variables
UNAME_S := $(shell uname -s 2>/dev/null || echo Windows_NT)
ifeq ($(UNAME_S),Linux)
    PLATFORM := linux
    EXE_EXT :=
    MKDIR := mkdir -p
    RM := rm -f
    RMDIR := rm -rf
    CC := gcc
    MINGW_CC := x86_64-w64-mingw32-gcc
    SDL3_LIBS := $(shell pkg-config --libs sdl3 SDL3_ttf 2>/dev/null || echo -lSDL3 -lSDL3_ttf) -lm
    CROSS_PREFIX := /usr/x86_64-w64-mingw32
else
    PLATFORM := windows
    EXE_EXT := .exe
    MKDIR := mkdir
    RM := del /Q
    RMDIR := rmdir /s /q
    CC := gcc
    SDL3_LIBS := -lSDL3 -lSDL3_ttf -mwindows
endif

# Directories
SRCDIR := src
BINDIR := bin
BINDIR_WIN := bin/win
INCDIR := include
DLL_CACHE := $(HOME)/.cache/glamac-dlls

# Compiler flags
CFLAGS := -I$(INCDIR) -O2 -flto
CFLAGS_NATIVE := $(CFLAGS) -march=native
CFLAGS_CROSS := $(CFLAGS) -I$(CROSS_PREFIX)/include

# Source files
GLAMAC_SRCS := $(wildcard $(SRCDIR)/glamac/*.c)
GLAUTILS_SRCS := $(wildcard $(SRCDIR)/glautils/*.c)
GLAUTILS_BINS := $(patsubst $(SRCDIR)/glautils/%.c, $(BINDIR)/%$(EXE_EXT), $(GLAUTILS_SRCS))
GLAUTILS_BINS_WIN := $(patsubst $(SRCDIR)/glautils/%.c, $(BINDIR_WIN)/%.exe, $(GLAUTILS_SRCS))

# Default target
all: glamac glautils

# Native build targets
glamac: $(BINDIR)/glamac$(EXE_EXT)

glautils: $(GLAUTILS_BINS)

$(BINDIR)/glamac$(EXE_EXT): $(GLAMAC_SRCS) | $(BINDIR)
	@echo "Building glamac..."
	$(CC) $^ $(CFLAGS_NATIVE) $(SDL3_LIBS) -o $@

$(BINDIR)/%$(EXE_EXT): $(SRCDIR)/glautils/%.c | $(BINDIR)
	$(CC) $< $(CFLAGS_NATIVE) -o $@

$(BINDIR):
	$(MKDIR) $(BINDIR)

# Windows cross-compilation (Linux only)
ifeq ($(PLATFORM),linux)

win: $(BINDIR_WIN)/glamac.exe win-dlls win-data

win-all: win $(GLAUTILS_BINS_WIN)

$(BINDIR_WIN)/glamac.exe: $(GLAMAC_SRCS) | $(BINDIR_WIN)
	@echo "Cross-compiling glamac for Windows..."
	@which $(MINGW_CC) >/dev/null 2>&1 || (echo "ERROR: Install mingw-w64-gcc first" && exit 1)
	$(MINGW_CC) $^ $(CFLAGS_CROSS) -L$(CROSS_PREFIX)/lib -lmingw32 -lSDL3 -lSDL3_ttf -mwindows -static-libgcc -o $@

$(BINDIR_WIN)/%.exe: $(SRCDIR)/glautils/%.c | $(BINDIR_WIN)
	$(MINGW_CC) $< $(CFLAGS_CROSS) -static-libgcc -o $@

$(BINDIR_WIN):
	$(MKDIR) $(BINDIR_WIN)

# Windows DLL management
win-dlls: | $(BINDIR_WIN)
	@echo "Getting Windows DLLs..."
	@$(MKDIR) $(DLL_CACHE)
	@if [ ! -f "$(DLL_CACHE)/SDL3.dll" ]; then \
		echo "Downloading SDL3.dll..."; \
		cd $(DLL_CACHE) && \
		wget -q https://github.com/libsdl-org/SDL/releases/download/release-3.2.10/SDL3-3.2.10-win32-x64.zip && \
		unzip -j SDL3-3.2.10-win32-x64.zip SDL3.dll && \
		$(RM) SDL3-3.2.10-win32-x64.zip; \
	fi
	@if [ ! -f "$(DLL_CACHE)/SDL3_ttf.dll" ]; then \
		echo "Downloading SDL3_ttf.dll..."; \
		cd $(DLL_CACHE) && \
		wget -q https://github.com/libsdl-org/SDL_ttf/releases/download/release-3.2.2/SDL3_ttf-3.2.2-win32-x64.zip && \
		unzip -j SDL3_ttf-3.2.2-win32-x64.zip SDL3_ttf.dll && \
		$(RM) SDL3_ttf-3.2.2-win32-x64.zip; \
	fi
	@cp $(DLL_CACHE)/*.dll $(BINDIR_WIN)/
	@echo "Windows build ready in $(BINDIR_WIN)/"

# Copy data files for Windows build
win-data: | $(BINDIR_WIN)
	@echo "Copying data files for Windows..."
	@$(MKDIR) $(BINDIR_WIN)/data/json
	@if [ -f "data/json/glasses.json" ]; then \
		cp data/json/glasses.json $(BINDIR_WIN)/data/json/; \
		cp data/json/glasses.json $(BINDIR_WIN)/; \
		echo "Copied glasses.json to Windows build"; \
	else \
		echo "Warning: glasses.json not found, Windows build may use fallback data"; \
	fi

# Cross-compilation setup
setup-cross:
	@echo "Setting up cross-compilation..."
	@which wget >/dev/null 2>&1 || (echo "Install wget first: sudo pacman -S wget" && exit 1)
	@which $(MINGW_CC) >/dev/null 2>&1 || (echo "Install mingw-w64-gcc first: sudo pacman -S mingw-w64-gcc" && exit 1)
	sudo $(MKDIR) $(CROSS_PREFIX)/include $(CROSS_PREFIX)/lib
	@echo "Downloading SDL3 development libraries..."
	cd /tmp && \
	wget -q https://github.com/libsdl-org/SDL/releases/download/release-3.2.10/SDL3-devel-3.2.10-mingw.tar.gz && \
	wget -q https://github.com/libsdl-org/SDL_ttf/releases/download/release-3.2.2/SDL3_ttf-devel-3.2.2-mingw.tar.gz && \
	tar -xzf SDL3-devel-3.2.10-mingw.tar.gz && \
	tar -xzf SDL3_ttf-devel-3.2.2-mingw.tar.gz && \
	sudo cp -r SDL3-3.2.10/x86_64-w64-mingw32/include/* $(CROSS_PREFIX)/include/ && \
	sudo cp -r SDL3-3.2.10/x86_64-w64-mingw32/lib/* $(CROSS_PREFIX)/lib/ && \
	sudo cp -r SDL3_ttf-3.2.2/x86_64-w64-mingw32/include/* $(CROSS_PREFIX)/include/ && \
	sudo cp -r SDL3_ttf-3.2.2/x86_64-w64-mingw32/lib/* $(CROSS_PREFIX)/lib/ && \
	$(RM) -rf SDL3-3.2.10* SDL3_ttf-3.2.2*
	@echo "Cross-compilation setup complete!"

else
# Windows host - disable cross-compilation
win win-all win-dlls setup-cross:
	@echo "Cross-compilation not available on Windows. Use 'make all' instead."
endif

# Excel to JSON conversion
EXCEL_FILES := $(wildcard data/Excel/*.xlsx)
JSON_FILES := $(patsubst data/Excel/%.xlsx, data/JSON/%.json, $(EXCEL_FILES))

convert-catalogs: $(JSON_FILES)

data/JSON/%.json: data/Excel/%.xlsx scripts/excel_to_json.py
	@echo "Converting $< to JSON..."
	@$(MKDIR) data/JSON
	@python3 scripts/excel_to_json.py $< -o $@

# Dependency management
deps:
ifeq ($(PLATFORM),linux)
	@echo "Installing dependencies..."
	sudo pacman -S --needed sdl3 git cmake pkgconf freetype2 python python-pandas python-openpyxl
	@echo "Building SDL3_ttf from source..."
	cd /tmp && $(RM) -rf SDL_ttf && \
	git clone https://github.com/libsdl-org/SDL_ttf.git && \
	cd SDL_ttf && git checkout release-3.2.2 && \
	cmake -B build -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr && \
	make -C build -j$$(nproc) && sudo make -C build install && \
	sudo ldconfig
	@echo "Dependencies installed!"
else
	@echo "Install SDL3 development libraries manually on Windows."
	@echo "Install Python with pandas and openpyxl for Excel conversion."
endif

# Cleanup
clean:
	$(RMDIR) $(BINDIR) 2>/dev/null || true

clean-deps:
ifeq ($(PLATFORM),linux)
	@echo "Removing SDL3 dependencies..."
	sudo pacman -R sdl3 --noconfirm 2>/dev/null || true
	sudo $(RM) -f /usr/lib/libSDL3_ttf.so* /usr/lib/libSDL3_ttf.a /usr/lib/pkgconfig/SDL3_ttf.pc
	sudo $(RMDIR) /usr/include/SDL3_ttf/ 2>/dev/null || true
	sudo ldconfig
	@echo "Dependencies removed!"
endif

clean-cache:
	$(RMDIR) $(DLL_CACHE) 2>/dev/null || true

clean-all: clean clean-cache

rebuild: clean all

# Help
help:
	@echo "GlaMaC Build System"
	@echo ""
	@echo "Build targets:"
	@echo "  all       - Build for current platform"
	@echo "  glamac    - Build main application only"
	@echo "  glautils  - Build utilities only"
	@echo "  clean     - Clean build files"
	@echo "  rebuild   - Clean and rebuild"
ifeq ($(PLATFORM),linux)
	@echo ""
	@echo "Cross-compilation (Linux → Windows):"
	@echo "  win       - Build glamac for Windows"
	@echo "  win-all   - Build everything for Windows"
	@echo "  setup-cross - Setup cross-compilation"
endif
	@echo ""
	@echo "Dependencies:"
	@echo "  deps      - Install SDL3 dependencies"
	@echo "  clean-deps - Remove SDL3 dependencies"
	@echo ""
	@echo "Glass catalog conversion:"
	@echo "  convert-catalogs - Convert Excel files to JSON"
	@echo ""
	@echo "Quick start:"
ifeq ($(PLATFORM),linux)
	@echo "  make deps && make all    # Native build"
	@echo "  make setup-cross && make win  # Windows build"
else
	@echo "  Install SDL3, then: make all"
endif

.PHONY: all glamac glautils win win-all win-dlls setup-cross convert-catalogs deps clean clean-deps clean-cache clean-all rebuild help