AC_INIT(configuration.ml.in)

PACKAGE=helm_gtk_interface
MAJOR_VERSION=0
MINOR_VERSION=0
MICRO_VERSION=2
VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION

DEFAULT_HELM_CONFIGURATION_DIR=/usr/local/etc/helm

AC_ARG_ENABLE(
	defaults,
	[  --enable-defaults[=ARG] if yes then use defaults (don't ask user) [default=auto]],
	USE_DEFAULTS=$enableval,
	USE_DEFAULTS=auto
)

if test "x$prefix" != xNONE; then
  RESOLVED_PREFIX=$prefix
else
  RESOLVED_PREFIX=$ac_default_prefix
fi

if test "x$exec_prefix" != xNONE; then
  RESOLVED_EXEC_PREFIX=$exec_prefix
else
  RESOLVED_EXEC_PREFIX=$RESOLVED_PREFIX
fi

dnl The following is the directory where the binary will be installed
BIN_DIR=$RESOLVED_EXEC_PREFIX/bin

AC_PATH_PROG(WGET_BINARY,wget,no)
if test $WGET_BINARY = no; then
	AC_MSG_WARN(wget is required to update the database)
fi

AC_PATH_PROG(PERL_BINARY,perl,no)
if test $PERL_BINARY = no ; then
   AC_MSG_ERROR(Could not find perl)
fi

dnl MISSING CHECKS:
dnl ocaml-findlib, ocaml-netstring, ocaml-pxp, ocaml-netclient

dnl Check for Ocaml
AC_CHECK_PROG(HAVE_OCAMLC, ocamlc, yes, no)
if test $HAVE_OCAMLC = "no"; then
  AC_MSG_ERROR(could not find ocamlc in PATH, please make sure ocaml is installed)
fi

dnl Check for the Ocaml library dir
AC_MSG_CHECKING(for the ocaml library dir)
OCAML_ROOT=`ocamlc -v | grep "^Standard" | sed 's/^.*: *//'`
AC_MSG_RESULT($OCAML_ROOT)

DEFAULT_MLMINIDOM_LIB_DIR=$OCAML_ROOT/mlminidom
DEFAULT_LABLGTK_LIB_DIR=$OCAML_ROOT/lablgtk
DEFAULT_LABLGTKMATHVIEW_LIB_DIR=$OCAML_ROOT/lablgtkmathview

dnl Check for mlminidom
DEFAULTS=$USE_DEFAULTS
if test $DEFAULTS = auto; then
	if test -f $DEFAULT_MLMINIDOM_LIB_DIR/minidom.mli; then
		MLMINIDOM_LIB_DIR=$DEFAULT_MLMINIDOM_LIB_DIR
	else
		DEFAULTS=no
	fi
fi

if test $DEFAULTS = no; then
	echo
	echo "Where can I find the mlminidom library?"
	echo
	echo -n "[[$DEFAULT_MLMINIDOM_LIB_DIR]] ? "
	echo
	read MLMINIDOM_LIB_DIR
	if test "x$MLMINIDOM_LIB_DIR" = x; then
		MLMINIDOM_LIB_DIR=$DEFAULT_MLMINIDOM_LIB_DIR
	fi
elif test $DEFAULTS = yes; then
	MLMINIDOM_LIB_DIR=$DEFAULT_MLMINIDOM_LIB_DIR
fi

AC_MSG_CHECKING(for $MLMINIDOM_LIB_DIR/minidom.mli)
if test ! -f $MLMINIDOM_LIB_DIR/minidom.mli; then
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(please check your installation)
fi
AC_MSG_RESULT(ok)

dnl Check for lablgtk
DEFAULTS=$USE_DEFAULTS
if test $DEFAULTS = auto; then
	if test -f $DEFAULT_LABLGTK_LIB_DIR/gtk.ml; then
		LABLGTK_LIB_DIR=$DEFAULT_LABLGTK_LIB_DIR
	else
		DEFAULTS=no
	fi
fi

if test $DEFAULTS = no; then
	echo
	echo "Where can I find the lablgtk library?"
	echo
	echo -n "[[$DEFAULT_LABLGTK_LIB_DIR]] ? "
	read LABLGTK_LIB_DIR
	echo
	if test "x$LABLGTK_LIB_DIR" = x; then
		LABLGTK_LIB_DIR=$DEFAULT_LABLGTK_LIB_DIR
	fi
elif test $DEFAULTS = yes; then
	LABLGTK_LIB_DIR=$DEFAULT_LABLGTK_LIB_DIR
fi

AC_MSG_CHECKING(for $LABLGTK_LIB_DIR/gtk.ml)
if test ! -f $LABLGTK_LIB_DIR/gtk.ml; then
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(please check your installation)
fi
AC_MSG_RESULT(ok)

dnl Check for lablgtkmathview
DEFAULTS=$USE_DEFAULTS
if test $DEFAULTS = auto; then
	if test -f $DEFAULT_LABLGTKMATHVIEW_LIB_DIR/gMathView.ml; then
		LABLGTKMATHVIEW_LIB_DIR=$DEFAULT_LABLGTKMATHVIEW_LIB_DIR
	else
		DEFAULTS=no
	fi
fi

if test $DEFAULTS = no; then
	echo
	echo "Where can I find the lablgtkmathview library?"
	echo
	echo -n "[[$DEFAULT_LABLGTKMATHVIEW_LIB_DIR]] ? "
	read LABLGTKMATHVIEW_LIB_DIR
	echo
	if test "x$LABLGTKMATHVIEW_LIB_DIR" = x; then
		LABLGTKMATHVIEW_LIB_DIR=$DEFAULT_LABLGTKMATHVIEW_LIB_DIR
	fi
elif test $DEFAULTS = yes; then
	LABLGTKMATHVIEW_LIB_DIR=$DEFAULT_LABLGTKMATHVIEW_LIB_DIR
fi

AC_MSG_CHECKING(for $LABLGTKMATHVIEW_LIB_DIR/gMathView.ml)
if test ! -f $LABLGTKMATHVIEW_LIB_DIR/gMathView.ml; then
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(please check your installation)
fi
AC_MSG_RESULT(ok)

dnl Check for HELM
DEFAULTS=$USE_DEFAULTS
if test $DEFAULTS = auto; then
	AC_CHECK_PROG(HAVE_HELM_CONFIG, helm-config, yes, no)
	if test $HAVE_HELM_CONFIG = yes; then
		HELM_CONFIGURATION_DIR=`helm-config --etc-dir`
	else
		DEFAULTS=no
	fi
fi

if test $DEFAULTS = no; then
	echo
	echo "\`helm-config' is not installed (or I can't find it in your path)."
	echo "Please, insert the directory where I can find the configuration"
	echo "files for HELM (configuration.xml in particular)..."
	echo
	echo -n "[[$DEFAULT_HELM_CONFIGURATION_DIR]] ? "
	read HELM_CONFIGURATION_DIR
	echo
	if test "x$HELM_CONFIGURATION_DIR" = "x"; then
		HELM_CONFIGURATION_DIR=$DEFAULT_HELM_CONFIGURATION_DIR
	fi
elif test $DEFAULTS = yes; then
	HELM_CONFIGURATION_DIR=$DEFAULT_HELM_CONFIGURATION_DIR
fi

AC_MSG_CHECKING(for configuration.xml)
if test -f $HELM_CONFIGURATION_DIR/configuration.xml; then
	AC_MSG_RESULT(ok)
else
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(please check your installation)
fi

AC_SUBST(PACKAGE)
AC_SUBST(VERSION)
AC_SUBST(OCAML_ROOT)
AC_SUBST(MLMINIDOM_LIB_DIR)
AC_SUBST(LABLGTK_LIB_DIR)
AC_SUBST(LABLGTKMATHVIEW_LIB_DIR)
AC_SUBST(BIN_DIR)
AC_SUBST(HELM_CONFIGURATION_DIR)
AC_SUBST(PERL_BINARY)

AC_OUTPUT([
  Makefile
  configuration.ml
  helm_wget
  helm_gtk_interface.spec
],
  chmod +x helm_wget
)