#
# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

AC_DEFUN([BDEPS_SCAN_FOR_BUILDDEPS],
[
    define(LIST_OF_BUILD_DEPENDENCIES,)
    if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
        if test "x$with_builddeps_conf" != x; then
            AC_MSG_CHECKING([for supplied builddeps configuration file])
            builddepsfile=$with_builddeps_conf        
            if test -s $builddepsfile; then
                . $builddepsfile
                AC_MSG_RESULT([loaded!])
            else
               AC_ERROR([The given builddeps conf file $with_builddeps_conf could not be loaded!])
           fi
        else
            AC_MSG_CHECKING([for builddeps.conf files in sources...])
            builddepsfile=`mktemp`
            touch $builddepsfile
            # Put all found confs into a single file.
            find ${SRC_ROOT} -name builddeps.conf -exec cat \{\} \; >> $builddepsfile
            # Source the file to acquire the variables
            if test -s $builddepsfile; then
                . $builddepsfile
                AC_MSG_RESULT([found at least one!])
            else
               AC_ERROR([Could not find any builddeps.conf at all!])
           fi
        fi
        # Create build and host names that use _ instead of "-" and ".".
        # This is necessary to use them in variable names.
        build_var=`echo ${build} | tr '-' '_' | tr '.' '_'`
        host_var=`echo ${host} | tr '-' '_' | tr '.' '_'`
        # Extract rewrite information for build and host
        eval rewritten_build=\${REWRITE_${build_var}}
        if test "x$rewritten_build" = x; then
            rewritten_build=${build}
            echo Build stays the same $rewritten_build
        else
            echo Rewriting build for builddeps into $rewritten_build
        fi
        eval rewritten_host=\${REWRITE_${host_var}}
        if test "x$rewritten_host" = x; then
            rewritten_host=${host}
            echo Host stays the same $rewritten_host
        else
            echo Rewriting host for builddeps into $rewritten_host
        fi
        rewritten_build_var=`echo ${rewritten_build} | tr '-' '_' | tr '.' '_'`
        rewritten_host_var=`echo ${rewritten_host} | tr '-' '_' | tr '.' '_'`        
    fi
    AC_CHECK_PROGS(BDEPS_UNZIP, [7z unzip])
    if test "x$BDEPS_UNZIP" = x7z; then
        BDEPS_UNZIP="7z x"
    fi

    AC_CHECK_PROGS(BDEPS_FTP, [wget lftp ftp]) 
])

AC_DEFUN([BDEPS_FTPGET],
[
    # $1 is the ftp://abuilddeps.server.com/libs/cups.zip
    # $2 is the local file name for the downloaded file.
    VALID_TOOL=no
    if test "x$BDEPS_FTP" = xwget; then
       VALID_TOOL=yes
       wget -O $2 $1
    fi
    if test "x$BDEPS_FTP" = xlftp; then
       VALID_TOOL=yes
       lftp -c "get $1 -o $2"
    fi
    if test "x$BDEPS_FTP" = xftp; then
        VALID_TOOL=yes
        FTPSERVER=`echo $1 | cut -f 3 -d '/'`
        FTPPATH=`echo $1 | cut -f 4- -d '/'`
        FTPUSERPWD=${FTPSERVER%%@*}
        if test "x$FTPSERVER" != "x$FTPUSERPWD"; then
            FTPUSER=${userpwd%%:*}
            FTPPWD=${userpwd#*@}
            FTPSERVER=${FTPSERVER#*@}
        else
            FTPUSER=ftp
            FTPPWD=ftp
        fi
        # the "pass" command does not work on some
        # ftp clients (read ftp.exe) but if it works,
        # passive mode is better!
        (\
            echo "user $FTPUSER $FTPPWD"        ;\
            echo "pass"                         ;\
            echo "bin"                          ;\
            echo "get $FTPPATH $2"              ;\
        ) | ftp -in $FTPSERVER
    fi
    if test "x$VALID_TOOL" != xyes; then
       AC_ERROR([I do not know how to use the tool: $BDEPS_FTP])
    fi
])

AC_DEFUN([BDEPS_CHECK_MODULE],
[
    define([LIST_OF_BUILD_DEPENDENCIES],LIST_OF_BUILD_DEPENDENCIES[$2=$3'\n'])
    if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
        # Source the builddeps file again, to make sure it uses the latest variables!
        . $builddepsfile
        # Look for a host and build machine specific resource!
        eval resource=\${builddep_$2_BUILD_${rewritten_build_var}_HOST_${rewritten_host_var}}
        if test "x$resource" = x; then
            # Ok, lets instead look for a host specific resource
            eval resource=\${builddep_$2_HOST_${rewritten_host_var}}
        fi
        if test "x$resource" = x; then
            # Ok, lets instead look for a build specific resource
            eval resource=\${builddep_$2_BUILD_${rewritten_build_var}}
        fi
        if test "x$resource" = x; then
            # Ok, lets instead look for a generic resource
            # (The $2 comes from M4 and not the shell, thus no need for eval here.)
            resource=${builddep_$2}
        fi
        if test "x$resource" != x; then
            AC_MSG_NOTICE([Using builddeps $resource for $2])
	    # If the resource in the builddeps.conf file is an existing directory,
	    # for example /java/linux/cups
	    if test -d ${resource}; then
	       depdir=${resource}
	    else
		BDEPS_FETCH($2, $resource, $with_builddeps_server, $with_builddeps_dir, depdir)
	    fi
            # Source the builddeps file again, because in the previous command, the depdir
            # was updated to point at the current build dependency install directory.
            . $builddepsfile
            # Now extract variables from the builddeps.conf files.
            theroot=${builddep_$2_ROOT}
            thecflags=${builddep_$2_CFLAGS}
            thelibs=${builddep_$2_LIBS}
            if test "x$depdir" = x; then
                AC_ERROR([Could not download build dependency $2])
            fi
            $1=$depdir
            if test "x$theroot" != x; then
               $1="$theroot"
            fi
            if test "x$thecflags" != x; then
               $1_CFLAGS="$thecflags"
            fi
            if test "x$thelibs" != x; then
               $1_LIBS="$thelibs"
            fi
            m4_default([$4], [:])
            m4_ifvaln([$5], [else $5])
        fi
        m4_ifvaln([$5], [else $5])
    fi
])

AC_DEFUN([BDEPS_FETCH],
[
# $1 is for example mymodule
# $2 is for example libs/general/libmymod_1_2_3.zip
# $3 is for example ftp://mybuilddeps.myserver.com/builddeps
# $4 is for example /localhome/builddeps
# $5 is the name of the variable into which we store the depdir, eg MYMOD
# Will download ftp://mybuilddeps.myserver.com/builddeps/libs/general/libmymod_1_2_3.zip and
# unzip into the directory: /localhome/builddeps/libmymod_1_2_3
    filename=`basename $2`
    filebase=`echo $filename | sed 's/\.[[^\.]]*$//'`
    filebase=${filename%%.*}
    extension=${filename#*.}
    installdir=$4/$filebase
    if test ! -f $installdir/$filename.unpacked; then
        AC_MSG_NOTICE([Downloading build dependency $1 from $3/$2 and installing into $installdir])
        if test ! -d $installdir; then
            mkdir -p $installdir
        fi
        if test ! -d $installdir; then
            AC_ERROR([Could not create directory $installdir])
        fi
        tmpfile=`mktemp $installdir/$1.XXXXXXXXX`
        touch $tmpfile    
        if test ! -f $tmpfile; then
            AC_ERROR([Could not create files in directory $installdir])
        fi
        BDEPS_FTPGET([$3/$2] , [$tmpfile])
        mv $tmpfile $installdir/$filename
        if test ! -s $installdir/$filename; then 
            AC_ERROR([Could not download $3/$2])
        fi
        case "$extension" in
            zip)  echo "Unzipping $installdir/$filename..."
               (cd $installdir ; rm -f $installdir/$filename.unpacked ; $BDEPS_UNZIP $installdir/$filename > /dev/null && touch $installdir/$filename.unpacked)
            ;;
            tar.gz) echo "Untaring $installdir/$filename..."
               (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
            ;;
            tgz) echo "Untaring $installdir/$filename..."
               (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
            ;;
            *) AC_ERROR([Cannot handle build depency archive with extension $extension])
            ;;
        esac
    fi
    if test -f $installdir/$filename.unpacked; then
        $5=$installdir
    fi
])