# Compiler configurations
# -----------------------
# Native build (gcc)
CC_NATIVE = gcc
CFLAGS_NATIVE = -g -std=c89 -Wall -Wextra -Werror -Wno-unused-parameter -I. #-O2 
LDFLAGS_NATIVE =
LDLIBS_NATIVE = -lSDL2

# WASM build (emscripten)
CC_WASM = emcc
CFLAGS_WASM = -g -std=c89 -Wall -Wextra -Werror -Wno-unused-parameter -I.
LDFLAGS_WASM = -s WASM=1 -g -s USE_SDL=2
LDLIBS_WASM =

# Source and build configuration
# ----------------------------
COMMON_SRC = $(wildcard *.c)

# Separate architecture sources
ARCH_SRC_LINUX = $(wildcard arch/linux/*.c)
ARCH_SRC_EMSCRIPTEN = $(wildcard arch/emscripten/*.c)

# Object directories
OBJ_DIR_NATIVE = build/native/obj
OBJ_DIR_WASM = build/wasm/obj

# Common objects from root
OBJ_NATIVE = $(addprefix $(OBJ_DIR_NATIVE)/,$(notdir $(COMMON_SRC:.c=.o)))
OBJ_WASM = $(addprefix $(OBJ_DIR_WASM)/,$(notdir $(COMMON_SRC:.c=.o)))

# Architecture-specific objects
OBJ_ARCH_NATIVE = $(addprefix $(OBJ_DIR_NATIVE)/,$(notdir $(ARCH_SRC_LINUX:.c=.o)))
OBJ_ARCH_WASM = $(addprefix $(OBJ_DIR_WASM)/,$(notdir $(ARCH_SRC_EMSCRIPTEN:.c=.o)))

# Executables
EXEC_NATIVE = zre
EXEC_WASM = zre.wasm

# Phony targets
.PHONY: all clean install wasm native emscripten linux macos

# Default target builds the native version
all: native

# Native build rules
# ------------------
native: linux

linux: $(EXEC_NATIVE)

$(EXEC_NATIVE): $(OBJ_NATIVE) $(OBJ_ARCH_NATIVE)
	$(CC_NATIVE) $(LDFLAGS_NATIVE) $^ $(LDLIBS_NATIVE) -o $@

# WASM build rules
# ----------------
wasm: emscripten

emscripten: $(EXEC_WASM)

$(EXEC_WASM): $(OBJ_WASM) $(OBJ_ARCH_WASM)
	$(CC_WASM) $(LDFLAGS_WASM) $^ $(LDLIBS_WASM) -o $@

# Object file rules
# -----------------
$(OBJ_DIR_NATIVE)/%.o: %.c
	@mkdir -p $(dir $@)
	$(CC_NATIVE) $(CFLAGS_NATIVE) -c $< -o $@

$(OBJ_DIR_WASM)/%.o: %.c
	@mkdir -p $(dir $@)
	$(CC_WASM) $(CFLAGS_WASM) -c $< -o $@

# Architecture-specific source rules
$(OBJ_DIR_NATIVE)/%.o: arch/linux/%.c
	@mkdir -p $(dir $@)
	$(CC_NATIVE) $(CFLAGS_NATIVE) -c $< -o $@

$(OBJ_DIR_WASM)/%.o: arch/emscripten/%.c
	@mkdir -p $(dir $@)
	$(CC_WASM) $(CFLAGS_WASM) -c $< -o $@

# Clean build artifacts
# ---------------------
clean:
	rm -rf $(OBJ_DIR_NATIVE) $(OBJ_DIR_WASM) $(EXEC_NATIVE) $(EXEC_WASM)

# Install target (example)
# ------------------------
install: native
	install -d $(DESTDIR)/usr/local/bin
	install $(EXEC_NATIVE) $(DESTDIR)/usr/local/bin/