#
# SYNOPSIS
#
#   AX_RESIP([MINIMUM-VERSION])
#
# NOTE 
#   Currently macros does not check the version of the resiprocate library
#
# DESCRIPTION
#
#   This macro provides tests of availability of the resiprocate library (resiprocate.org)
#
#   Next options are available:
#   --with-resip=path defines the complete path to the Resiprocate includes and 
#                      libraries 
#   --with-resip-inc=path defines the complete path to resip headers
#   --with-resip-lib=path defines the complete path to resip library
#
#   This macro calls:
#
#     AC_SUBST(RESIP_CPPFLAGS)
#     AC_SUBST(RESIP_LDFLAGS)
#     AC_SUBST(RESIP_LIBS)
#
#   And sets:
#
#     HAVE_RESIPROCATE
#
# COPYLEFT
#
#   Copyright (c) 2009 Tarasenko Volodymyr <tvntsr@yahoo.com>
#
#   Copying and distribution of this file, with or without
#   modification, are permitted in any medium without royalty provided
#   the copyright notice and this notice are preserved. This file is 
#   offered as-is, without any warranty.


AC_DEFUN([AX_RESIP],
[
	AC_ARG_WITH([resip],
		AC_HELP_STRING([--with-resip=@<:@ARG@:>@],
			[use Resiprocate library @<:@default=yes@:>@, optionally specify a path to includes and library]
		),
		[
			if test "$withval" = "no"; then
				want_resip="no"
			elif test "$withval" = "yes"; then
				want_resip="yes"
			else
				want_resip="yes"
				resip_path="$withval"
			fi
		],
		[want_resip="yes"]
	)
	dnl
	dnl RESIP includes
	dnl
	AC_ARG_WITH([resip_inc],
		AC_HELP_STRING([--with-resip-inc=@<:@ARG@:>@],
				[specify Resiprocate includes]
		),
		[
			case "$withval" in
				/* ) ;;
				* )  AC_MSG_ERROR([The Resiprocate includes directory must be an absolute path.]) ;;
			esac

			resip_inc_path="$withval"
		],
		[resip_inc_path="/usr/include /usr/include/resip /usr/local/include /usr/local/resip"]
	)
	dnl
	dnl RESIP libraries
	dnl
	AC_ARG_WITH([resip_lib],
			AC_HELP_STRING([--with-resip-lib=@<:@ARG@:>@],
					[specify Resiprocate library path]
			),
			[
				case "$withval" in
					/* ) ;;
					* )  AC_MSG_ERROR([The Resiprocate library path directory must be an absolute path.]) ;;
				esac

				resip_lib_path="$withval"
			],
			[resip_lib_path="/lib /usr/lib /usr/lib64 /usr/local/lib /usr/local/resip"]
	)

	RESIP_CPPFLAGS=""
	RESIP_LDFLAGS=""
        RESIP_LIBS=""

	dnl
	dnl Do checks
	dnl

	AC_MSG_CHECKING([for Resiprocate library])

	if test "x$want_resip" = "xyes"; then
		AC_REQUIRE([AC_PROG_CPP])
		AC_REQUIRE([AC_CANONICAL_BUILD])

		CPPFLAGS_SAVED="$CPPFLAGS"
		LDFLAGS_SAVED="$LDFLAGS"
		LIBS_SAVED="$LIBS"

		if test -n "$resip_path"; then
		    RESIP_CPPFLAGS="-I$resip_path"
		    RESIP_LDFLAGS="-L$resip_path"
		else
		    for inc in $resip_inc_path; do
			if test -f "$inc/resip/stack/SipStack.hxx"; then
				RESIP_CPPFLAGS="-I$inc"
				break
			fi
		    done

		    for inc in $resip_lib_path; do
			libextension=`ls $inc/libresip.{so,dylib,a} 2>/dev/null | sed 's,.*/,,' |sed -e 's;^lib\(resip\)\.so$;\1;' -e 's;^lib\(resip\)\.a$;\1;' -e 's;^lib\(resip\)\.dylib$;\1;'`
			if test -n "$libextension"; then
				RESIP_LDFLAGS="-L$inc"
				break
			fi
		    done
		fi

		dnl
		dnl Simple add libresip and librutil, should be fixed in future
		dnl even library was not found try to link it, maybe it is somewhere in LD_LIBRARY_PATH...
		RESIP_LIBS="-ldum -lresip -lrutil -lares"
		CPPFLAGS="$CPPFLAGS $RESIP_CPPFLAGS $CFLAGS"
		LDFLAGS="$LDFLAGS $RESIP_LDFLAGS"
		LIBS="$RESIP_LIBS $LIBS"
	
		AC_LANG_PUSH(C++)

		AC_LINK_IFELSE(AC_LANG_PROGRAM([[ @%:@include <resip/stack/SipStack.hxx>
					]],
					[[
					resip::SipStack stack(0, resip::DnsStub::EmptyNameserverList,0,false,0); 
					return 0;
					]]),
					[resip_found="yes"],
					[resip_found="no"])

		AC_LANG_POP([C++])

		LDFLAGS="$LDFLAGS_SAVED"
		CPPFLAGS="$CPPFLAGS_SAVED"
		LIBS="$LIBS_SAVED"

		if test "x$resip_found" = "xyes"; then
		    AC_DEFINE([HAVE_RESIPROCATE], [1],
				[Define to 1 if RESIPROCATE library is available])

		    AC_SUBST(RESIP_CPPFLAGS)
		    AC_SUBST(RESIP_LDFLAGS)
		    AC_SUBST(RESIP_LIBS)
		fi
	fi
	
	if test "x$resip_found" = "xyes"; then
	    AC_MSG_RESULT([yes])
	else
	    AC_MSG_ERROR([[Could not detect the Resiprocate libraries.]])
	    AC_MSG_RESULT([no])
	fi
])