SRCDIR=src
HEADDIR=include
BUILDDIR=build
DEBUGDIR=$(BUILDDIR)/debug
TEXTUREDIR=textures
OBJFILEDIR=obj
BACKUPDIR=backup
TESTDIR=unittest
TESTFLAGS= $(FLAGS) -lboost_unit_test_framework 

CC=g++ 
FLAGS=-Wall -g -DDEBUG -Wno-write-strings 
FLAGS-FINAL=$(FLAGS)
CFLAGS = -L/usr/X11R6/lib -L/usr/local/lib -lm -lrt -lpthread -I$(HEADDIR) 
LDFLAGS = $(CFLAGS)

SRC= $(shell find $(SRCDIR) -name "*.cpp")
OBJ= $(SRC:$(SRCDIR)/%.cpp=$(BUILDDIR)/%.o)

EXEC=main

.PHONY: all
all: build

#link all .o to an executable file in debug dir
$(EXEC): $(OBJ)
	@if test ! -d "$(DEBUGDIR)"; then mkdir $(DEBUGDIR); fi 
	$(CC) -o $(DEBUGDIR)/$@ $^ $(LDFLAGS)
	@if test -d "$(OBJFILEDIR)"; then cp -Rf $(OBJFILEDIR) $(DEBUGDIR); fi
	@if test -d "$(TEXTUREDIR)"; then cp -Rf $(TEXTUREDIR) $(DEBUGDIR); fi

#compile all .cpp and .hpp into .o in build dir
$(BUILDDIR)/%.o: $(SRCDIR)/%.cpp $(HEADDIR)/%.hpp
	@if test ! -d "$(BUILDDIR)"; then mkdir $(BUILDDIR); fi 
	$(CC) -o $@ -c $< $(FLAGS) $(CFLAGS)

#clean the build
.PHONY: clean
clean:
	@rm -rf $(BUILDDIR) && echo "clean done..."

.PHONY: backup
backup:
	@if test ! -d $(BACKUPDIR); then mkdir $(BACKUPDIR); fi 
	@export temp="$(BACKUPDIR)/$(SRCDIR)-`date`"; mkdir "$${temp}"; cp -R $(SRCDIR) "$${temp}"/$(SRCDIR); cp -R $(HEADDIR) "$${temp}"/$(HEADDIR)

.PHONY: clean-backup
clean-backup:
	@rm -rf $(BACKUPDIR)

.PHONY: clean-build
clean-build: clean build 
	
.PHONY: build
build: makesubdir $(EXEC)

makesubdir:
	@if test ! -d "$(BUILDDIR)"; then mkdir -p $(BUILDDIR); fi 
	@if test ! -d "$(DEBUGDIR)"; then mkdir -p $(DEBUGDIR); fi 
	@cd $(SRCDIR); find -maxdepth 1 -type d -not -wholename "./.*" -exec mkdir -p "../$(BUILDDIR)/{}" \; ;

.PHONY: run
run: build 
	@cd $(DEBUGDIR); ./$(EXEC)

debugrun: build
	@cd $(DEBUGDIR); gdb ./$(EXEC)

test:
	$(CC) $(TESTFLAGS) $(TESTDIR)/tests.cpp $(SRCDIR)/charutils.cpp $(SRCDIR)/linkedlist.cpp $(SRCDIR)/linkedlistbi.cpp $(SRCDIR)/linkedhashtable.cpp $(SRCDIR)/hash.cpp -o $(TESTDIR)/main -I$(HEADDIR)
	@cd $(TESTDIR); ./main