#directory structure 
INCLUDE_DIR := ./include
SERVER_DIR := ./server
CLIENT_DIR := ./client
BIN_DIR := ./bin
OBJ_DIR := ./obj

#phony target
.PHONY: all clean-obj clean-main clean-file rebuild debug
.DEFAULT_GOAL := all


# CC is compiler and compiler options
CC := gcc
CFLAGS := -Wall -g -O1 -I$(INCLUDE_DIR) -pthread -lmysqlclient


# Conditional logic to set FINAL and SRC_DIR

ifeq ($(FINAL),server)
	SRC_DIR := $(SERVER_DIR)
	TARGET := $(BIN_DIR)/server

else ifeq ($(FINAL),client)
	SRC_DIR := $(CLIENT_DIR)
	TARGET := $(BIN_DIR)/client
else
    # This target will be the default if FINAL is not set
    default:
	    $(error "FINAL must be 'server' or 'client'")
endif

# file preparation
SRCS := $(wildcard $(SRC_DIR)/*.c)
OBJS := $(patsubst $(SRC_DIR)/%.c, $(OBJ_DIR)/%.o, $(SRCS)) 
DEPS := $(OBJS)


# final target
MESSAGE := "Build Succeed!"
all: $(TARGET)
	@echo $(MESSAGE)

#linking .o files
$(TARGET):$(DEPS)
	$(CC) $(CFLAGS) $^ -o $@
#compiling to generate .o files
$(OBJ_DIR)/%.o : $(SRC_DIR)/%.c 
	$(CC) $(CFLAGS) -c $< -o $@

#cleaning options
clean:
	rm -f  ./obj/*.o
	rm -f ./bin/server
	rm -f ./bin/client
clean-server:
	rm -f ./bin/server
clean-client:
	rm -f ./bin/client
clean-file:
	rm -f $(BIN_DIR)/$(FN) $(OBJ_DIR)/$(FileName)
rebuild:
	clean-$(FINAL) all
#debugging information
debug:
	@echo "TARGET: $(TARGET)"
	@echo "DEPS: $(DEPS)"
	@echo "CFLAGS: $(CFLAGS)"

help:
	@echo "Available targets:"
	@echo "  clean      - clean all the build files"
	@echo "  clean-obj  - clean object files"
	@echo "  clean-server - clean the server executable"
	@echo "  clean-client - clean the client executable"
	@echo "  clean-file - clean a specific file (specify FN=<filename>)"
	@echo "  rebuild    - clean and rebuild the project"
	@echo "  debug      - print Makefile variables for debugging"