#!/bin/sh

#foreach( $var in $vars )
#if( $var.exec )
${var.name}=`${var.value}`
#else
${var.name}=${var.value}
#end
#end

#if ( ! $project.hasVar("PREFIX") )
PREFIX=/usr
#end
#if ( ! $project.hasVar("EPREFIX") )
EPREFIX=$PREFIX
#end

#if ( ! $project.hasVar("BINDIR") )
BINDIR=
#end
#if ( ! $project.hasVar("SBINDIR") )
SBINDIR=
#end
#if ( ! $project.hasVar("LIBDIR") )
LIBDIR=
#end
#if ( ! $project.hasVar("LIBEXECDIR") )
LIBEXECDIR=
#end
#if ( ! $project.hasVar("DATADIR") )
DATADIR=
#end
#if ( ! $project.hasVar("SYSCONFDIR") )
SYSCONFDIR=
#end
#if ( ! $project.hasVar("SHAREDSTATEDIR") )
SHAREDSTATEDIR=
#end
#if ( ! $project.hasVar("LOCALSTATEDIR") )
LOCALSTATEDIR=
#end
#if ( ! $project.hasVar("INCLUDEDIR") )
INCLUDEDIR=
#end
#if ( ! $project.hasVar("INFODIR") )
INFODIR=
#end
#if ( ! $project.hasVar("MANDIR") )
MANDIR=
#end

OS=`uname -s`
OS_VERSION=`uname -r`

TEMP_DIR=".tmp-`uname -n`"
mkdir -p $TEMP_DIR
if [ $? -ne 0 ]; then
	echo "Cannot create tmp dir"
	echo "Abort"
fi
touch $TEMP_DIR/options
touch $TEMP_DIR/features

# features
#foreach( $feature in $features )
#if( ${feature.isDefault()} )
${feature.getVarName()}=on
#end
#end

# help text
printhelp()
{
	echo "Usage: $0 [OPTIONS]..."
	cat << __EOF__
Installation directories:
  --prefix=PREFIX         path prefix for architecture-independent files
                          [/usr]
  --exec-prefix=EPREFIX   path prefix for architecture-dependent files
                          [PREFIX]

  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        system configuration files [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
  --infodir=DIR           info documentation [DATAROOTDIR/info]
  --mandir=DIR            man documentation [DATAROOTDIR/man]

#if( $options.size() > 0 )
Options:
#foreach( $opt in $options )
  --${opt.getArgument()}=${opt.getValuesString()}
#end

#end
#if( $features.size() > 0 )
Optional Features:
#foreach( $feature in $features )
#if( $feature.default )
  --disable-${feature.arg}
#else
  --enable-${feature.arg}
#end
#end

#end
__EOF__
}

#
# parse arguments 
#
#set( $D = '$' )
for ARG in $@
do
    case "$ARG" in
		"--prefix="*)         PREFIX=${D}{ARG#--prefix=} ;;
		"--exec-prefix="*)    EPREFIX=${D}{ARG#--exec-prefix=} ;;
		"--bindir="*)         BINDIR=${D}{ARG#----bindir=} ;;
		"--sbindir="*)        SBINDIR=${D}{ARG#--sbindir=} ;;
		"--libdir="*)         LIBDIR=${D}{ARG#--libdir=} ;;
		"--libexecdir="*)     LIBEXECDIR=${D}{ARG#--libexecdir=} ;;
		"--datadir="*)        DATADIR=${D}{ARG#--datadir=} ;;
		"--sysconfdir="*)     SYSCONFDIR=${D}{ARG#--sysconfdir=} ;;
		"--sharedstatedir="*) SHAREDSTATEDIR=${D}{ARG#--sharedstatedir=} ;;
		"--localstatedir="*)  LOCALSTATEDIR=${D}{ARG#--localstatedir=} ;;
		"--includedir="*)     INCLUDEDIR=${D}{ARG#--includedir=} ;;
		"--infodir="*)        INFODIR=${D}{ARG#--infodir=} ;;
		"--mandir"*)          MANDIR=${D}{ARG#--mandir} ;;
		"--help"*) printhelp; exit 1 ;;
	#foreach( $opt in $options )
    	"--${opt.getArgument()}="*) ${opt.getVarName()}=${D}{ARG#--${opt.getArgument()}=} ;;
    #end
	#foreach( $feature in $features )
		"--enable-${feature.arg}") ${feature.getVarName()}=on ;;
		"--disable-${feature.arg}") unset ${feature.getVarName()} ;;
	#end
		"-"*) echo "unknown option: $ARG"; exit 1 ;;
	esac
done

# set dir variables
if [ -z "$BINDIR" ]; then
	BINDIR=$EPREFIX/bin
fi
if [ -z "$SBINDIR" ]; then
	SBINDIR=$EPREFIX/sbin
fi
if [ -z "$LIBDIR" ]; then
	LIBDIR=$EPREFIX/lib
fi
if [ -z "$LIBEXEC" ]; then
	LIBEXECDIR=$EPREFIX/libexec
fi
if [ -z "$DATADIR" ]; then
	DATADIR=$PREFIX/share
fi
if [ -z "$SYSCONFDIR" ]; then
	SYSCONFDIR=$PREFIX/etc
fi
if [ -z "$SHAREDSTATEDIR" ]; then
	SHAREDSTATEDIR=$PREFIX/com
fi
if [ -z "$LOCALSTATEDIR" ]; then
	LOCALSTATEDIR=$PREFIX/var
fi
if [ -z "$INCLUDEDIR" ]; then
	INCLUDEDIR=$PREFIX/include
fi
if [ -z "$INFODIR" ]; then
	INFODIR=$PREFIX/info
fi
if [ -z "$MANDIR" ]; then
	MANDIR=$PREFIX/man
fi

which pkg-config > /dev/null
if [ $? -eq 0 ]; then
    PKG_CONFIG=pkg-config
else
    PKG_CONFIG=false
fi

# Simple uname based platform detection
# $PLATFORM is used for platform dependent dependency selection
printf "detect platform... "
if [ $OS = SunOS ]; then
    PLATFORM="solaris sunos unix svr4"
fi
if [ $OS = Linux ]; then
    PLATFORM="linux unix"
fi
if [ $OS = FreeBSD ]; then
    PLATFORM="freebsd bsd unix"
fi
if [ $OS = Darwin ]; then
    PLATFORM="macos osx bsd unix"
fi
echo $OS | grep "MINGW" > /dev/null
if [ $? -eq 0 ]; then
    PLATFORM="windows mingw"
fi

if [ -z "$PLATFORM" ]; then
    PLATFORM="unix"
fi

for p in $PLATFORM
do
	PLATFORM_NAME=$p
	break
done
echo $PLATFORM_NAME

isplatform()
{
    for p in $PLATFORM
    do
        if [ $p = $1 ]; then
            return 0
        fi
    done
    return 1
}
isnotplatform()
{
    for p in $PLATFORM
    do
        if [ $p = $1 ]; then
            return 1
        fi
    done
    return 0
}

# generate config.mk and config.h
cat > $TEMP_DIR/config.mk << __EOF__
#
# config.mk generated by configure
#

# general vars
#foreach( $var in $vars )
${var.name}=$${var.name}
#end

#if ( ! $project.hasVar("PREFIX") )
PREFIX=$PREFIX
#end
#if ( ! $project.hasVar("EPREFIX") )
EPREFIX=$EPREFIX
#end

#if ( ! $project.hasVar("BINDIR") )
BINDIR=$BINDIR
#end
#if ( ! $project.hasVar("SBINDIR") )
SBINDIR=$SBINDIR
#end
#if ( ! $project.hasVar("LIBDIR") )
LIBDIR=$LIBDIR
#end
#if ( ! $project.hasVar("LIBEXECDIR") )
LIBEXECDIR=$LIBEXECDIR
#end
#if ( ! $project.hasVar("DATADIR") )
DATADIR=$DATADIR
#end
#if ( ! $project.hasVar("SYSCONFDIR") )
SYSCONFDIR=$SYSCONFDIR
#end
#if ( ! $project.hasVar("SHAREDSTATEDIR") )
SHAREDSTATEDIR=$SHAREDSTATEDIR
#end
#if ( ! $project.hasVar("LOCALSTATEDIR") )
LOCALSTATEDIR=$LOCALSTATEDIR
#end
#if ( ! $project.hasVar("INCLUDEDIR") )
INCLUDEDIR=$INCLUDEDIR
#end
#if ( ! $project.hasVar("INFODIR") )
INFODIR=$INFODIR
#end
#if ( ! $project.hasVar("MANDIR") )
MANDIR=$MANDIR
#end

__EOF__

echo > $TEMP_DIR/make.mk

ENV_CFLAGS=$CFLAGS
ENV_LDFLAGS=$LDFLAGS
ENV_CXXFLAGS=$CXXFLAGS

# Toolchain detection
# this will insert make vars to config.mk
. make/toolchain.sh

# add user specified flags to config.mk
echo >> $TEMP_DIR/config.mk
if [ ! -z "${ENV_CFLAGS}" ]; then
    echo "CFLAGS += $ENV_CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${ENV_CXXFLAGS}" ]; then
    echo "CXXFLAGS += $ENV_CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${ENV_LDFLAGS}" ]; then
    echo "LDFLAGS += $ENV_LDFLAGS" >> $TEMP_DIR/config.mk
fi

#
# DEPENDENCIES
#

#foreach( $dependency in $namedDependencies )
dependency_${dependency.name}()
{
    printf "checking for ${dependency.name}... "
    #foreach( $sub in $dependency.getSubdependencies() )
    # dependency $sub.name $sub.getPlatformString()
    while true
    do
    	#if( $sub.platform )
    	if isnotplatform "${sub.platform}"; then
            break
        fi
    	#end
		#foreach( $not in $sub.getNotList() )
		if isplatform "${not}"; then
            break
        fi
		#end
        #if( $sub.pkgconfig.size() > 0 )
        if [ -z "$PKG_CONFIG" ]; then
        	break
        fi
        #end
        #foreach( $pkg in $sub.pkgconfig )
		$PKG_CONFIG $pkg.getPkgConfigParam()
        if [ $? -ne 0 ] ; then
            break
        fi
        CFLAGS="$CFLAGS `$PKG_CONFIG --cflags $pkg.getPkgConfigParam()`"
        LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs $pkg.getPkgConfigParam()`"
        #end
        #foreach( $flags in $sub.flags )
        #if( $flags.exec )
        $flags.value > /dev/null
        if [ $? -eq 0 ]; then
            $flags.varName="$$flags.varName `$flags.value`"
        else
            break
        fi
        #else
        $flags.varName="$$flags.varName $flags.value"    
        #end
        #end
        #foreach( $test in $sub.tests )
        $test > /dev/null
        if [ $? -ne 0 ]; then
        	break
        fi
        #end
		#if ( $sub.make.length() > 0 )
		cat >> $TEMP_DIR/make.mk << __EOF__
# Dependency: $dependency.name		
$sub.make
__EOF__
        #end
		echo yes
        return 0
    done
	
	#end
	echo no
	return 1
}
#end

DEPENDENCIES_FAILED=
ERROR=0
#if( $dependencies.size() > 0 )
# general dependencies
CFLAGS=
LDFLAGS=
#foreach( $dependency in $dependencies )
while true
do
	#if( $dependency.platform )
    if isnotplatform "${dependency.platform}"; then
        break
    fi
    #end
	#foreach( $not in $dependency.getNotList() )
    if isplatform "${not}"; then
        break
    fi
	#end
    while true
    do
        #if( $dependency.pkgconfig.size() > 0 )
        if [ -z "$PKG_CONFIG" ]; then
            ERROR=1
            break
        fi
        #end
        #foreach( $pkg in $dependency.pkgconfig )
        printf "checking for pkg-config package $pkg.getPkgConfigParam()... "
		$PKG_CONFIG $pkg.getPkgConfigParam()
        if [ $? -ne 0 ]; then
            echo no
            ERROR=1
            break
        fi
        echo yes
        CFLAGS="$CFLAGS `$PKG_CONFIG --cflags $pkg.getPkgConfigParam()`"
        LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs $pkg.getPkgConfigParam()`"
        #end
        
        #foreach( $flags in $dependency.flags )
        #if( $flags.exec )
        $flags.value > /dev/null
        if [ $? -ne 0 ]; then
            $flags.varName="$$flags.varName `$flags.value`"
        else
            ERROR=1
            break
        fi
        #else
        $flags.varName="$$flags.varName $flags.value"    
        #end
        #end
		#if ( $dependency.make.length() > 0 )
		cat >> $TEMP_DIR/make.mk << __EOF__
$dependency.make
__EOF__
        #end
        
        break
    done
    
    break
done
#end

# add general dependency flags to config.mk
echo >> $TEMP_DIR/config.mk
if [ ! -z "${CFLAGS}" ]; then
    echo "CFLAGS += $CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${CXXFLAGS}" ]; then
    echo "CXXFLAGS += $CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${LDFLAGS}" ]; then
    echo "LDFLAGS += $LDFLAGS" >> $TEMP_DIR/config.mk
fi
#end

#
# OPTION VALUES
#
#foreach( $opt in $options )
#foreach( $val in $opt.values )
${val.func}()
{
	VERR=0
	#foreach( $dep in $val.dependencies )
	dependency_$dep
	if [ $? -ne 0 ]; then
		VERR=1
	fi
	#end
	if [ $VERR -ne 0 ]; then
		return 1
	fi
	#foreach( $def in $val.defines )
		CFLAGS="$CFLAGS ${def.toFlags()}"
	#end
	#if( $val.hasMake() )
	cat >> $TEMP_DIR/make.mk << __EOF__
$val.make
__EOF__
	#end
	return 0
}
#end
#end

#
# TARGETS
#
CFLAGS=
CXXFLAGS=
LDFLAGS=

#foreach( $target in $targets )
#if ( $target.name )
# Target: $target.name
#else
# Target
#end
CFLAGS=
LDFLAGS=
CXXFLAGS=

#foreach( $dependency in $target.dependencies )
dependency_$dependency
if [ $? -ne 0 ]; then
	DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED ${dependency} "
	ERROR=1
fi
#end

# Features
#foreach( $feature in $target.features )
if [ ! -z "$${feature.getVarName()}" ]; then
#foreach( $dependency in $feature.dependencies )
	# check dependency
	dependency_$dependency
	if [ $? -ne 0 ]; then
		# "auto" features can fail and are just disabled in this case
		if [ $${feature.getVarName()} != "auto" ]; then
			DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED ${dependency} "
			ERROR=1
		fi
	fi
#end
fi
#end

#foreach( $opt in $target.options )
# Option: --${opt.argument}
if [ -z ${D}${opt.getVarName()} ]; then
	SAVED_ERROR=$ERROR
	SAVED_DEPENDENCIES_FAILED=$DEPENDENCIES_FAILED
	ERROR=0
	while true
	do
		#foreach( $optdef in $opt.defaults )
		#if( $optdef.platform )
		if isplatform "$optdef.platform"; then
		#end
		$optdef.func
		if [ $? -eq 0 ]; then
			echo "  ${opt.argument}: ${optdef.valueName}" >> $TEMP_DIR/options
			ERROR=0
			break
		fi
		#if( $optdef.platform )
		fi
		#end
		#end
		break
	done
	if [ $ERROR -ne 0 ]; then
		SAVED_ERROR=1
	fi
	ERROR=$SAVED_ERROR
	DEPENDENCIES_FAILED=$SAVED_DEPENDENCIES_FAILED=
else
	if false; then
		false
	#foreach( $optval in $opt.values )
	elif [ ${D}${opt.getVarName()} = "${optval.value}" ]; then
		echo "  ${opt.argument}: ${D}${opt.getVarName()}" >> $TEMP_DIR/options
		$optval.func
		if [ $? -ne 0 ]; then
			ERROR=1
		fi
	#end
	fi
fi
#end

echo >> $TEMP_DIR/config.mk
if [ ! -z "${CFLAGS}" ]; then
    echo "${target.getCFlags()}  += $CFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${CXXFLAGS}" ]; then
    echo "${target.getCXXFlags()} += $CXXFLAGS" >> $TEMP_DIR/config.mk
fi
if [ ! -z "${LDFLAGS}" ]; then
    echo "${target.getLDFlags()} += $LDFLAGS" >> $TEMP_DIR/config.mk
fi

#end
if [ $ERROR -ne 0 ]; then
	echo
	echo "Error: Unresolved dependencies"
	echo $DEPENDENCIES_FAILED
	rm -Rf $TEMP_DIR
	exit 1
fi

echo "configure finished"
echo
echo "Build Config:"
echo "  PREFIX:    $PREFIX"
echo "  TOOLCHAIN: $TOOLCHAIN_NAME"
#if ( $options.size() > 0 )
echo "Options:"
cat $TEMP_DIR/options
#end
echo
cat $TEMP_DIR/config.mk $TEMP_DIR/make.mk > config.mk
rm -Rf $TEMP_DIR