#!/usr/bin/env bash
#
# Does various checks for people that we can use to diagnose
# an end user installation
#
temp_cs=temp$$.cs
temp_exe=temp$$.exe
if test -f $temp_cs; then
    echo Error: need a temporary file name, and $temp_cs already exists
    echo Run this program from a different directory, or delete the file and try again.
    exit 1
fi

set `echo $PATH | sed 's/:/ /g'`

while test x$1 != x; do
    if test -x $1/mono; then
	if test x$monocmd = x; then
	   monocmd=$1/mono
        else
	   other_monos="$1/mono $other_monos"
	fi
    fi
    shift
done

echo Active Mono: $monocmd

if test "x$other_monos" != x; then
	echo "Other Mono executables: $other_monos"
fi


#
# Check that the pkg-config mono points to this mono
#
if pkg-config --modversion mono >& /dev/null; then 
        pkg_config_mono=`(cd \`pkg-config --variable prefix mono\`/bin; pwd)`/mono
	if test $pkg_config_mono != $monocmd; then
	    echo "Error: pkg-config Mono installation points to a different install"
	    echo "       than the Mono found:"
	    echo "       Mono on PATH: $monocmd"
	    echo "       Mono from pkg-config: $pkg_config_mono"
	fi
else 
        echo "Warning: pkg-config could not find mono installed on this system"
fi

##########################################################################################
#
# Tests below this point require the dotnet install
#
#

#
# Check that -pkg:dotnet is available
#
if pkg-config --modversion dotnet >& /dev/null; then
       echo ""
else
       echo "No dotnet pkgconfig found, Windows.Forms, System.Drawing and others will not work"
       exit 1
fi

case `uname` in
    Darwin) 
    	macos=true
    	libgdiplus=libgdiplus.dylib
	LD_PATH=DYLD_LIBRARY_PATH
	;;
    *) 
    	macos=false;
	libgdiplus=libgdiplus.so
	LD_PATH=LD_LIBRARY_PATH
	;;
esac

search_libgdiplus_on_path()
{
    libgdiplus_found=false
	if $macos; then
	    set `echo $DYLD_LIBRARY_PATH | sed 's/:/ /g'`
	else
	    set `echo $LD_LIBRARY_PATH | sed 's/:/ /g'`
	fi
	while test x$1 != x; do
	    if test -e $1/$libgdiplus; then
		   echo "    The $libgdiplus is found on $libdir/$libgdiplus"
		   libgdiplus_found=true
		   libgdiplus_path=$1/$libgdiplus
		   break
	    fi
	    shift
	done
}

#
# Check GDI+ installation
#
cat > $temp_cs <<EOF
using System;
using System.Drawing;

class X { 
    static void Main ()
    {
	    Bitmap b = new Bitmap (100, 100);
    }
}
EOF
if mcs -pkg:dotnet $temp_cs >& /dev/null; then
    if mono $temp_exe >& /dev/null; then
	echo Your have a working System.Drawing setup
    else
        echo Your system has a broken System.Drawing setup
        if mono $temp_exe 2>&1 | grep 'System.DllNotFoundException: gdiplus.dll' > /dev/null; then
	   echo "    your gdiplus.dll can not be loaded"

	   libdir=`dirname $monocmd`/../lib
	   if test -f $libdir/$libgdiplus; then
	       echo "    The $libgdiplus is found on $libdir/$libgdiplus"
	       if test -e $libdir/$libgdiplus; then
		   libgdiplus_path=$libdir/$libgdiplus
		   libgdiplus_found=true
	       else
		   echo "    but it seems to be a broken link"
	       fi
	   else
	       search_libgdiplus_on_path
	   fi
	   if $libgdiplus_found; then
	       echo ssss 
	       if which ldd >/dev/null; then
		   LANG=C dirs=`ldd $libgdiplus_path | grep 'not found'`
		   if echo $dirs | grep 'not found' >& /dev/null; then
		       echo "    libgdiplus is missing the following dependencies to run:"
		       echo $dirs | sed 's/^/        /'
		   fi
	       fi 
	   else
	       echo "    No libgdiplus was found on your $LD_PATH"
	   fi
	fi
    fi
else
    echo Failed to compile sample System.Drawing program, your installation is broken
    exit 1
fi

cat > $temp_cs <<EOF
using System;
using System.Reflection;
using System.IO;

class Program {

    public static void Main()
    {
        object watcher = new FileSystemWatcher()
            .GetType ()
            .GetField ("watcher", BindingFlags.NonPublic | BindingFlags.Static)
            .GetValue (null);
        
        Console.WriteLine ("Your file system watcher is: {0}",
                   watcher != null
                   ? watcher.GetType ().FullName
                   : "unknown");
    }
}
EOF

if mcs $temp_cs >& /dev/null; then
    mono $temp_exe
else
    echo Failed to compile sample test program, your installation is broken
    exit 1
fi