# =====================
# Compiler settings
# =====================
CC      = gcc
CFLAGS  = -std=c11 -Wall -Wextra -O2 -Iinclude

# =====================
# Directories
# =====================
SRCDIR     = src
INCDIR     = include
OBJDIR     = obj
TESTDIR    = tests
TESTBINDIR = $(TESTDIR)/bin

# =====================
# Platform selection
# =====================
ifeq ($(OS),Windows_NT)
	PLATFORM_SRC = $(SRCDIR)/win32_platform.c
	EXEEXT = .exe
else
	PLATFORM_SRC = $(SRCDIR)/linux_platform.c
	EXEEXT =
endif

# =====================
# Tools
# =====================
RM    = rm -f
MKDIR = mkdir -p

# =====================
# Library (platform backend)
# =====================
LIB_SRC = $(PLATFORM_SRC)
LIB_OBJ = $(patsubst %.c,$(OBJDIR)/%.o,$(LIB_SRC))

# =====================
# Test / final binaries
# =====================
TEST_SRCS = $(wildcard $(TESTDIR)/*.c)
TEST_BINS = $(patsubst $(TESTDIR)/%.c,$(TESTBINDIR)/%$(EXEEXT),$(TEST_SRCS))

# =====================
# Targets
# =====================
.PHONY: all test clean

# Build everything
all: $(LIB_OBJ) $(TEST_BINS)

# =====================
# Compile platform object
# =====================
$(OBJDIR)/%.o: %.c
	@$(MKDIR) $(dir $@)
	$(CC) $(CFLAGS) -c $< -o $@

# =====================
# Build each binary
# =====================
$(TESTBINDIR)/%$(EXEEXT): $(TESTDIR)/%.c $(LIB_OBJ)
	@$(MKDIR) $(TESTBINDIR)
	$(CC) $(CFLAGS) $< $(LIB_OBJ) -o $@

# =====================
# Test runner
# =====================
test: all
	@echo "Running binaries..."
	@SUCCESS=0; FAILURE=0; \
	for bin in $(TEST_BINS); do \
		echo "--------------------------------"; \
		echo "Running $$bin"; \
		"./$$bin"; \
		EC=$$?; \
		NAME=$$(basename "$$bin"); \
		if [ $$EC -eq 0 ]; then \
			printf "\033[0;32m%s: EXIT %d (SUCCESS)\033[0m\n" "$$NAME" "$$EC"; \
			SUCCESS=$$((SUCCESS+1)); \
		else \
			printf "\033[0;31m%s: EXIT %d (FAILURE)\033[0m\n" "$$NAME" "$$EC"; \
			FAILURE=$$((FAILURE+1)); \
		fi; \
	done; \
	echo ""; \
	echo "SUCCESS: $$SUCCESS"; \
	echo "FAILURE: $$FAILURE"; \
	if [ $$FAILURE -ne 0 ]; then exit 1; fi

# =====================
# Clean
# =====================
clean:	
	-$(RM) -r $(OBJDIR) $(TESTBINDIR)	
	@echo "Cleaned objects and test binaries"