dnl Check for ProjectVersion file to proceed
AC_INIT(ProjectVersion)

dnl Configure header.
AC_CONFIG_HEADER(config.h)

installPackage()
{
   if test -z "$BZIP2" || test -z "$TAR"; then
      return -1
   fi

   PACK=`ls $1-*-pack-*.tar.bz2 2> /dev/null`
   if test -n "$PACK"; then
      echo -n "Found $PACK, installing ... "
      if $BZIP2 -cd $PACK | $TAR xf -; then
         echo "ok"
         return 0
      else
         echo "failed"
         return -1
      fi
   fi

   if test -z "$WGET"; then
      return -1
   fi

   eval "
      if test -z \"\$$1_$HOST\"; then
         return -1
      fi
   "

   # Download from FE4 SITE
   echo "No packs found in directory, trying to install from internet ..."
   eval "
      if \$WGET -nv $FE4_SITE/packages/\$$1_$HOST; then
         echo -n \"Installing pack \$$1_$HOST ... \"

         sleep 1s
         OK=\`ls \$$1_$HOST 2> /dev/null\`
         if test -z \"\$OK\"; then
            echo \"failed\"
            return -1
         fi

         if $BZIP2 -cd \$$1_$HOST | \$TAR xf -; then
            echo \"ok\"
            return 0
         else
            echo \"failed\"
            return -1
         fi
      fi
   "
   return -1
}

if test ! -e .LICENSE.read; then
   dnl License
   echo "This project is bound under the GPL licence."
   echo
   echo "In simple terms, it states that you may freely copy, and distribute the source"
   echo "code in it's exact form. Which means you may not modify the original"
   echo "distribution."
   echo
   echo "However, if you do modify the source code, you must display clear notices"
   echo "that you changed the files and keep all old licences and notices intact."
   echo
   echo "If you incorporate any parts of our project into yours, you must release"
   echo "your project under the same license: release all source code of your project"
   echo "and place it under the GPL."
   echo
   echo "Press enter."
   read

   echo "Now the whole licence."
   echo
   echo "You automatically agree to the GPL licence by using this project."
   echo "If you do not agree, you may delete this project."
   echo "Type 'understood' to continue."
   read
   if test "$REPLY" != "understood"  ; then
      echo "You must enter 'understood' to continue."
      exit 1
   fi
fi
touch .LICENSE.read

dnl Init stuff
echo "-- Configuring FE4 Project --"

if test ! -r "fe4.smc"; then
   echo "Please place 'fe4.smc' into the current directory."
   exit 1
fi

echo -n "checking project version ... "
eval `cat ProjectVersion`
echo -n "$MAJORVERSION.$MINORVERSION.$BUILDVERSION"
if test $PATCHLEVEL -ne 0; then
   echo -n ".$PATCHLEVEL"
fi
echo

dnl Check system.
AC_CANONICAL_SYSTEM
AC_CYGWIN

case "$host" in
   *-*-linux*)
      HOST=linux
      ;;
   *-*-cygwin*)
      HOST=cygwin
      ;;
   *-*-mingw32*)
      HOST=mingw32
      ;;
   *-*-*djgpp*)
      HOST=djgpp
      ;;
   *-*-interix*)
      HOST=sua
      ;;
esac

dnl Checks for programs.
AC_PROG_CC
if test -z $CC; then
   echo "Error: GCC is required to build this project."
   exit 1
fi

AC_CHECK_PROGS(MAKE,gmake)
if test -z $MAKE; then
   AC_CHECK_PROGS(MAKE,make)
   if test -z $MAKE; then
       echo "Error: GNU Make is required to build this project."
       exit 1
   fi
fi

AC_CHECK_PROGS(CP,cp)
AC_CHECK_PROGS(RM,rm)
if test -z "$CP" -o -z "$RM"; then
   echo "Error: GNU File Utilities is required to build this project."
   exit 1
fi

AC_CHECK_PROGS(TAR,tar)
AC_CHECK_PROGS(BZIP2,bzip2)
AC_CHECK_PROGS(WGET,wget)

NOCOMPRESS=""

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h unistd.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE

dnl Checks for library functions.
AC_CHECK_FUNCS(strtol)

dnl Checks for system specifics.
AC_EXEEXT
AC_OBJEXT

dnl Attempt to build packages 

if test "$HOST" = "cygwin" -o "$HOST" = "mingw32" -o "$HOST" = "sua"; then
	mv packages/sif/Makefile packages/sif/Makefile.bak && \
	sed -e "s/LDFLAGS=.*/LDFLAGS=/" packages/sif/Makefile.bak > packages/sif/Makefile
fi
$MAKE -C packages
$MAKE -C packages DESTDIR="$PWD" install

dnl FE4 project specific checks
AC_PATH_PROGS(SIF,sif${EXEEXT},,bin)
AC_PATH_PROGS(IPS2SIF,ips2sif${EXEEXT},,bin)
AC_PATH_PROGS(SCANZ,scanz${EXEEXT},,bin)
if test -z "$SIF" -o -z "$IPS2SIF" -o -z "$SCANZ"; then
   if ! installPackage sif; then
      echo "Error: Please install the SIF package from $FE4_SITE"
      exit 1
   fi
fi

if test -z "$NOCOMPRESS_STRING"; then
   AC_PATH_PROGS(X86AS,65816${EXEEXT},,bin)
   if test -z "$X86AS"; then
      if ! installPackage as65816; then
         NOCOMPRESS="NOCOMPRESS=1"
      fi
   fi
fi

LDFLAGS=-Llib 
AC_CHECK_LIB(tbl,main,LIBTBL=-ltbl)
if test -z "$LIBTBL"; then
   if ! installPackage libtbl; then
      echo "Error: Please install the LIBTBL package from $FE4_SITE"
      exit 1
   fi
   LIBTBL=-ltbl
fi

AM_PATH_SDL(1.2.0,WITH_SDL="WITH_SDL=1"; CFLAGS="$SDL_CFLAGS $CFLAGS"; LIBSDL="$SDL_LIBS")

AC_SUBST(HOST)

AC_SUBST(LIBSDL)
AC_SUBST(LIBTBL)
AC_SUBST(LIBPTHREAD)

AC_SUBST(WITH_SDL)
AC_SUBST(NOCOMPRESS)

AC_OUTPUT(Makefile.cfg)

echo
echo "Configuration of the FE4 project complete."
echo
echo -n "Dictionary compression: "
if test -z "$NOCOMPRESS"; then echo "yes"
else echo "no"; fi
echo -n "Build character viewer: "
if test -z "$WITH_SDL"; then echo "no"
else echo "yes"; fi
echo