include project.conf

ifndef PROJECT_NAME
$(error Missing PROJECT_NAME. Put variables at project.conf file)
endif
ifndef TEST_BIN
$(error Missing TEST_BIN. Put variables at project.conf file)
endif

OS := $(shell uname -s)
SHELL := bash
COLOR_PREFIX := e

ifeq ($(OS),Darwin)
	COLOR_PREFIX := 033
endif

BROWN=\$(COLOR_PREFIX)[0;33m
BLUE=\$(COLOR_PREFIX)[1;34m
END_COLOR=\$(COLOR_PREFIX)[0m

BUILDDIR := target/c/build
BINDIR := target/c/bin
SRCDIR := src/c

SRCEXT := c
CC := gcc

# Defines the language standards for GCC
STD := -std=gnu99 # See man gcc for more options
# Protection for stack-smashing attack
STACK := -fstack-protector-all -Wstack-protector
# Specifies to GCC the required warnings
WARNS := -Wall -Wextra -pedantic # -pedantic warns on language standards
# Flags for compiling
CFLAGS := -O3 $(STD) $(STACK) $(WARNS)
# Debug options
DEBUG := -g3 -DDEBUG=1

# %.o file names
NAMES := $(notdir $(basename $(wildcard $(SRCDIR)/*.$(SRCEXT))))
NAMES += $(notdir $(basename $(wildcard $(SRCDIR)/crc/*.$(SRCEXT))))
NAMES_TEST := $(notdir $(basename $(wildcard $(SRCDIR)/test/*.$(SRCEXT))))
OBJECTS :=$(patsubst %,$(BUILDDIR)/%.o,$(NAMES))
OBJECTS_TEST :=$(patsubst %,$(BUILDDIR)/test/%.o,$(NAMES_TEST))

.PHONY: help all prepare run build

default: prepare all

help:
	@echo "C Project Template"
	@echo "Target rules:"
	@echo "    all      - Compiles and generates static library and tests"
	@echo "    build    - Compiles and generates static library"
	@echo "    test     - Compile and run tests"
	@echo "    prepare  - Prepare the environment"
	@echo "    clean    - Clean the project by removing build artifacts"
	@echo "    help     - Prints a help message with target rules"

prepare:
	mkdir -p $(BUILDDIR) $(BUILDDIR)/test $(BINDIR)

all: $(BINDIR)/$(TEST_BIN) $(BINDIR)/$(LIBRARY)

build: prepare $(BINDIR)/$(LIBRARY)

$(BINDIR)/$(LIBRARY): $(OBJECTS)
	@echo OBJECTS: $(OBJECTS)
	@echo -en "$(BROWN)LD $(END_COLOR)";
	gcc-ar rcs $(BINDIR)/$(LIBRARY) $(OBJECTS)
	@echo -en "\n--\nLibrary file placed at" \
			  "$(BROWN)$(BINDIR)/$(LIBRARY)$(END_COLOR)\n";

$(BINDIR)/$(TEST_BIN): $(OBJECTS) $(OBJECTS_TEST)
	@echo OBJECTS: $(OBJECTS) $(OBJECTS_TEST)
	@echo -en "$(BROWN)LD $(END_COLOR)";
	$(CC) -o $(BINDIR)/$(TEST_BIN) $+ $(DEBUG) $(CFLAGS) $(BUILD)
	@echo -en "\n--\nTest binary file placed at" \
			  "$(BROWN)$(BINDIR)/$(TEST_BIN)$(END_COLOR)\n";

test: prepare $(BINDIR)/$(TEST_BIN)
	@echo "Running the tests"
	@echo "========================================================================="
	@$(BINDIR)/$(TEST_BIN)

# Rule for object binaries compilation
$(BUILDDIR)/%.o: $(SRCDIR)/%.$(SRCEXT)
	@echo -en "$(BROWN)CC $(END_COLOR)";
	$(CC) -c $^ -o $@ $(DEBUG) $(CFLAGS) $(BUILDDIR)

$(BUILDDIR)/test/%.o: $(SRCDIR)/test/%.$(SRCEXT)
	@echo -en "$(BROWN)CC $(END_COLOR)";
	$(CC) -c $^ -o $@ $(DEBUG) $(CFLAGS) $(BUILDDIR)

clean:
	rm -rvf $(BUILDDIR) $(BINDIR) $(LOGDIR)