#!/bin/sh
#
# Myth II install script
# $Id: setup,v 1.31 1999/08/05 02:38:12 megastep Exp $

# Go to the proper setup directory (if not already there)
cd `dirname $0`

# Return the appropriate architecture string
function DetectARCH {
	status=1
	case `uname -m` in
		i?86)  echo "x86"
			status=0;;
		ppc)   echo "ppc"
			status=0;;
		alpha) echo "alpha"
			status=0;;
		*)     echo "unknown";;
	esac
	return $status
}

# Return the appropriate version string
function DetectLIBC {
      status=1
      if [ -f /lib/libc.so.6 ]; then
              if fgrep GLIBC_2.1 /lib/libc.so.6 2>&1 >/dev/null; then
                      echo "glibc-2.1"
                      status=0
              else    
                      echo "glibc-2.0"
                      status=0
              fi        
      elif [ -f /lib/libc.so.5 ]; then
              echo "libc5"
              status=0
      else
              echo "unknown"
      fi
      return $status
}

# Make a symbolic link
function SymLink {
	if [ -f $2 ]; then
		if [ -L $2 ]; then
			echo -n "The symbolic link"
		else
			echo -n "The file"
		fi
		echo -n " $2 already exists; are you sure you want to overwrite it? [N/y] "
		read answer
		[ "x$answer" = x ] && answer=n
		case "$answer" in
		[nN]*)
			return 1;;
		[yY]*)
			echo "rm -f \"$2\"" >> "$install_path/uninstall"
			ln -sf "$1" "$2"
			return $!;
		esac
	else
		echo "rm -f \"$2\"" >> "$install_path/uninstall"
		ln -sf "$1" "$2"
	fi
}

function Aborting {
	echo
	echo '*** Signal caught, aborting. ***'
	if [ "$started" = 1 ]; then
		echo "Removing installed files ..."
		sh "$install_path/uninstall"
		[ -f "$install_path/uninstall.dir" ] && sh "$install_path/uninstall.dir"
	fi
	exit 2
}

trap Aborting SIGTERM SIGINT SIGHUP

# Add desktop menu bar items
function Add_DeskTop_MenuItem
{
	desktop=$1; deskfile=$2
	if [ -d "$desktop" ]; then
		desktop="$desktop/Games"
		if [ ! -d "$desktop" ]; then
			MakeDir "$desktop" 2>/dev/null
		fi
		if [ -w "$desktop" ]; then
			echo "Creating $desktop/$deskfile"
			cat >"$desktop/$deskfile" <<__EOF__
[${3}Desktop Entry]
Name=Myth II
Comment=Myth II: Soulblighter
Exec=$symlink/myth2
Icon=$install_path/myth2.xpm
Terminal=0
Type=Application
__EOF__
		fi
	fi
}

# Copy a file and add it to the install log
# $2 has to be a directory name

function CopyFile
{
	echo "rm -f $2"/`basename "$1"` >> "$install_path/uninstall"
	cp -f "$1" "$2"
}

function MakeDir
{
	echo rmdir "\"$1\"" >> "$install_path/uninstall.dir"
	mkdir -p "$1"
}

# Copy a tag file to the specified location
function CopyTagFile
{
	echo -n "Copying $1 to $install_path/tags..."
	if CopyFile "tags/$1" "$install_path/tags"; then
		echo Done.
		return 0
	else
		echo FAILED.
		return 1
	fi
}

function CopyPluginFile
{
	echo -n "Copying $1 to $install_path/plugins..."
	if CopyFile "plugins/$1" "$install_path/plugins"; then
		echo Done.
		return 0
	else
		echo FAILED.
		return 1
	fi
}

function CopyMovieFiles
{
	value=0
	cd cutscenes
	for a in *.mpg; do
		echo -n "Copying $a to $install_path/cutscenes..."
		if CopyFile "$a" "$install_path/cutscenes"; then
			echo Done.
		else
			echo FAILED.
			value=1
		fi
	done
	cd ..
	return $value
}

function CopyBinary
{
	target=""
	if [ -f "$bindir/$1" ]; then
		target="$bindir/$1";
	else
		if [ -f "$gbindir/$1" ]; then
			target="$gbindir/$1";
		fi
	fi
	if [ "x$target" = x ]; then
		echo "Unable to locate a valid $1 binary."
		return 1
	else
		CopyFile "$target" "$install_path"
	fi
}

arch=`DetectARCH`
libc=`DetectLIBC`
started=0
echo "----====== Myth II: Soulblighter installation program ======----"
echo
echo "You are running a $arch machine with $libc"

gbindir=bin/$arch
bindir=$gbindir/$libc
installer="$gbindir/ginstall"
if [ ! -d "$bindir" ]; then
      echo "This installation of Myth II doesn't support $libc on $arch"    >&2
	  echo
      echo "Please contact Loki Technical Support at support@lokigames.com" >&2
      exit 1
fi

# Detect working X11 server

if [ "x$DISPLAY" != x ]; then
	ok=0
	echo "Running graphical installation program..."
	# The executable is here but we can't execute it from CD
	cp $installer $HOME/.ginstall$$
	chmod +x $HOME/.ginstall$$
	$HOME/.ginstall$$ $* 2> /dev/null && ok=1
	rm -f $HOME/.ginstall$$
	[ $ok = 1 ] && exit 0 # We assume all went well, and exit now
	echo "GUI installer failed, running the shell-only installer..."
	echo
fi

# Shell only installation, is executed even if the GUI installer failed
echo "Hit Control-C anytime to cancel this installation script."
echo

# Display the README here ?

echo
install_path=/usr/local/games/myth2
echo -n "Please enter the installation path [$install_path] : "
read answer
[ "x$answer" != x ] && install_path="$answer"
echo "Files will be installed in $install_path"
if [ ! -d "$install_path" ]; then
	echo -n "The $install_path directory does not exist; create it ? [Y/n] "
	read answer
	[ "x$answer" = x ] && answer=y
	case "$answer" in
	[yY]*)
		mkdir -p $install_path || { echo "Error while creating directory, aborting."; exit 1; }
		;;
	*)
		echo Aborting.
		exit 1
		;;
	esac
fi

free_kb=`df $install_path|grep /dev|awk '{print $4}'`
echo
echo "$free_kb KB are available on the chosen filesystem."
echo
size=none
while [ "$size" = 800000 ]; do
	echo
	echo "Please choose the size of the installation:"
	echo "   1) CD Only: ~10MB"
	echo "   2) Small: ~120MB"
	echo "   3) Large: ~510MB"
	echo "   4) Full:  ~640MB"
	echo -n "Your choice: "
	read answer
	case "$answer" in
	1)
		size=cdonly
		mini=10000;;
	2)
		size=small
		mini=120000
		;;
	3)
		size=large
		mini=510000 ;;
	4)
		size=full
		mini=640000 ;;
	esac
	# Check for disk space
	if expr "$free_kb" \< "$mini" > /; then
		echo "There is not enough disk space available for this installation."
		size=none
	fi
done
echo "'$size' installation chosen."

# http://forum.linspire.com/viewtopic.php?p=169203&sid=9d33d7410c9153a3480c886d83dc9f81#169203
# if expr "$free_kb" \< "$mini" > /dev/null; 
# if expr "$free_kb" \< "$mini" > "$install_path";

glide=0
if [ -f "$bindir/myth2_glide" ]; then # Only ask if the binary is available
	echo
	echo "Do you want to install the Glide (3Dfx) version of the game?"
	echo -n "You need to have the Glide runtime libraries installed for this. [y/n] "
	read answer
	case "$answer" in
	[yY]*)
		glide=1
		echo "The Glide version will be installed."
		;;
	esac
fi

echo
echo -n "Do you want to install the Myth II tools (Fear and Loathing) ? [y/n] "
read answer
tools=0
case "$answer" in
[yY]*)
	tools=1
	echo "The tools will be installed."
	;;
esac

echo
symlink=/usr/local/bin
ok=0
while [ "$ok" = 0 ]; do
	echo -n "Enter the location of the symbolic link for the game [$symlink]: "
	read answer
	[ "x$answer" != x ] && symlink="$answer"
	if [ ! -d "$symlink" ]; then
		echo "The $symlink directory does not exist!"
	else 
		if [ ! -w "$symlink" ]; then
			echo "You don't have the permission to write in $symlink"
		else
			ok=1
		fi
	fi
done

menu_items=1
echo
echo -n "Do you want desktop menu items to be installed (Gnome/KDE) ? [Y/n] "
read answer
case "$answer" in
[nN]*)
	menu_items=0;;
esac

started=1
echo '#!/bin/sh' > "$install_path/uninstall"
echo "rm -f $install_path/uninstall" >> "$install_path/uninstall"
echo "rm -f $install_path/uninstall.dir" >> "$install_path/uninstall"
chmod +x "$install_path/uninstall"
# Now copy the files to the specified location.
MakeDir "$install_path/plugins"

# Minimum set of files
CopyPluginFile "Patch 1.2"
CopyPluginFile "Patch 1.3"
# CopyFile desktop/myth2.xpm "$install_path"
# CopyFile desktop/icon.bmp "$install_path"
# CopyFile desktop/splash.bmp "$install_path"
# CopyFile desktop/loathing.png "$install_path"
# CopyFile README.tools "$install_path"

case "$size" in
cdonly)
	;;
small)
	MakeDir "$install_path/tags"
	CopyTagFile "international small install"
	CopyTagFile "small install"
	;;
large)
	MakeDir "$install_path/tags"
	CopyTagFile "international small install"
	CopyTagFile "small install"
	CopyTagFile "medium install"
	CopyTagFile "international large install"
	CopyTagFile "large install"
	;;
full)
	MakeDir "$install_path/tags"
	CopyTagFile "international small install"
	CopyTagFile "small install"
	CopyTagFile "medium install"
	CopyTagFile "international large install"
	CopyTagFile "large install"
	MakeDir "$install_path/cutscenes"
	CopyMovieFiles
	;;
*)
	MakeDir "$install_path/tags"
	CopyTagFile "international small install"
	CopyTagFile "small install"
	CopyTagFile "medium install"
	CopyTagFile "international large install"
	CopyTagFile "large install"
	MakeDir "$install_path/cutscenes"
	CopyMovieFiles
	;;
#	echo Internal error. Aborting.
#	exit 1;;

esac

if [ "$glide" = 1 ]; then
	# Copy the Glide binary
	binary="myth2_glide"
else
	# Copy the X11 binary
	binary="myth2_x11"
fi
CopyBinary $binary || { echo "Error while copying $binary."; exit 1; }
SymLink "$install_path/$binary" "$symlink/myth2"

if [ "$tools" = 1 ]; then
	# Copy the tools
	CopyBinary fear || { echo "Error while copying fear"; exit 1; }
	CopyBinary loathing || { echo "Error while copying loathing"; exit 1; }
	SymLink "$install_path/fear" "$symlink/fear"
	SymLink "$install_path/loathing" "$symlink/loathing"
fi

if [ "$menu_items" = 1 ]; then
	echo
	echo "============================================================="
	echo "Adding desktop menu items ..."
	for gnomedir in "/opt/gnome" "/usr/share/gnome" "$HOME/.gnome"; do
		Add_DeskTop_MenuItem "$gnomedir/apps" "myth2.desktop"
	done
	for kdedir in "/opt/kde" "/usr/share/kde" "$HOME/.kde"; do
		Add_DeskTop_MenuItem "$kdedir/share/applnk" "myth2.kdelnk" "KDE "
	done
fi

# Append the uninstall script for directories
cat "$install_path/uninstall.dir" >> "$install_path/uninstall"
rm -f "$install_path/uninstall.dir"

echo
echo Myth II was successfully installed on your system.

exit 0
# EOF