#
#!/data/data/com.termux/files/usr/bin/bash
#
# This script is _EXPERIMENTAL_
#
#
vassal_version=3.7.9
java_version=17
github_dl=https://github.com/vassalengine/vassal/releases/download/

cat <<EOF
This script will try to install VASSAL and needed
applications into your Termux installation on an Android
device.

This script is EXPERIMENTAL - it may or may not work.  No
Warrenty!

The script assumes that you have given Termux access to the
standard Android file system by executing

    termux-setup-storage

If you have not done that, please end this script now.

The script also assumes you have access to the internet.  If
not, then exit the script now.

The script will install VASSAL version ${vassal_version}.

If you want to install a different version, end the script
now and edit the line

    vassal_version=${vassal_version}

in the script, and re-execute the script.

EOF

read -n 1 -p "Are you ready? (Y/n)"
case x$REPLY in
    x|xy|xY) ;;
    *) echo "OK, ending the script"; exit 0 ;;
esac

# --- Fail on errors -------------------------------------------------
set -e

# --- Go Home --------------------------------------------------------
cd $HOME

# --- Download VASSAL ------------------------------------------------
echo "Downloading VASSAL version ${vassal_version}"
rm -f VASSAL-${vassal_version}-linux.tar.bz2*
wget -nv --show-progress \
     ${github_dl}/${vassal_version}/VASSAL-${vassal_version}-linux.tar.bz2

if test ! -f VASSAL-${vassal_version}-linux.tar.bz2 ; then
    echo "Failed to download VASSAL"
    exit 1
fi

# --- Unpack VASSAL --------------------------------------------------
echo -n "Unpacking VASSAL version ${vassal_versio} ... "
tar -xjf VASSAL-${vassal_version}-linux.tar.bz2

rm -f VASSAL-current
ln -s VASSAL-${vassal_version} VASSAL-current
echo "done"

# --- Update and upgraded packages -----------------------------------
echo -n "Updating and upgrading Termux packages, log in update.log ... "
pkg update -y  >  update.log 2>&1 
pkg upgrade -y >> update.log 2>&1
echo "done"

# --- "Install" X repo -----------------------------------------------
echo -n "Adding X repo and installing X packages, log in x.log ... "
pkg install -y x11-repo               >  x.log 2>&1
pkg update -y                         >> x.log 2>&1 
pkg install -y tigervnc xfce4 netsurf >> x.log 2>&1
echo "done"

# --- Install JAVA ---------------------------------------------------
echo -n "Installing JAVA ${java_version}, log in java.log ... "
pkg install -y openjdk-${java_version}-x which nano > java.log 2>&1
echo "done"

# --- Configure VNC server -------------------------------------------
echo "Creating ~/.vnc"
mkdir -p $HOME/.vnc

echo "Creating ~/.vnc/config"
cat <<EOF > ${HOME}/.vnc/config
# See https://tigervnc.org/doc/x0vncserver.html for more settings
localhost
depth=24
geometry=2400x1080
EOF

echo "Creating ~/.vnc/xstartup"
cat <<EOF > ${HOME}/.vnc/xstartup
#!/data/data/com.termux/files/usr/bin/sh
#
# This will launch a XFCE desktop environment.  For other
# options, see
# https://wiki.termux.com/wiki/Graphical_Environment
#
xfce4-session &
EOF
chmod a+x ${HOME}/.vnc/xstartup

echo "Creating ~/.vnc/xvassal"
cat <<EOF > ${HOME}/.vnc/xvassal
#!/data/data/com.termux/files/usr/bin/bash
#
# This will launch a XFCE desktop environment.  For other
# options, see
#  https://wiki.termux.com/wiki/Graphical_Environment
#
xfce4-session &
#
# This will execute VASSAL as the X session application.
# When VASSAL is exited, the X session will automatically end.
#
env bash \$HOME/VASSAL-current/VASSAL.sh
EOF
chmod a+x ${HOME}/.vnc/xvassal

# --- Widget set-up --------------------------------------------------
echo "Creating ~/.shortcuts"
mkdir -p ${HOME}/.shortcuts

echo "Creating ~/.shortcuts/VASSAL"
cat <<EOF > ${HOME}/.shortcuts/VASSAL
#!/data/data/com.termux/files/usr/bin/bash
#
# This will start up an X session with VASSAL running in it.
# When youstop the VASSAL application, the X session will
# automatically end. This will run whatever X session
# defined in ~/.vnc/xvassal.  Please see that file for more.

xstart=\$HOME/.vnc/xvassal
oper=start

read -n 1 -p "Do want to start? (Y/n) "
case x\$REPLY in
  xy|xY|x) oper=start ;;
  *) oper=stop ;;
esac

case \$oper in
start)
    echo "IMPORTANT: Enable Termux Wake-Lock through its notification"
    termux-wake-lock
    if test \$? -ne 0 ; then 
        read -n 1 -p "Failed to aquire Wake-lock, exiting"
        exit 1
    fi

    vncserver \\
        -xstartup \$xstart \\
        -autokill \\
        -fg \\
        :1 &

    vnc_pid=\$!
    sleep 3

    termux-open-url vnc://localhost:5901

    wait \$vnc_pid

    termux-wake-unlock
    ;;
stop)
    echo "Stopping the VNC server"
    vncserver -clean -kill :1
    ;;
esac
EOF
chmod a+x ${HOME}/.shortcuts/VASSAL

# --- Create directory for VASSAL modules ----------------------------
mkdir -p ${HOME}/VMods

# --- Desktop setup --------------------------------------------------
echo "Creating ~/Desktop"
mkdir -p ${HOME}/Desktop

echo "Creating ~/Desktop/VASSAL.desktop"
cat <<EOF > ${HOME}/Desktop/VASSAL.desktop
[Desktop Entry]
Type=Application
MimeType=application/x-vassal-module;application/x-vassal-log;application/x-vassal-save
Name=VASSAL
Exec=${HOME}/VASSAL-current/VASSAL.sh
Icon=${HOME}/VASSAL-current/VASSAL.svg
Actions=Run;Edit;

[Desktop Action Run]
Name=Run
Exec=${HOME}/VASSAL-current/VASSAL.sh -l %f
                                   
[Desktop Action Edit]
Name=Edit                                                     
Exec=${HOME}/VASSAL-current/VASSAL.sh -e %f
EOF
chmod a+x $HOME/Desktop/VASSAL.desktop

dsk_dir=$HOME/.local/share/applications/
mkdir -p ${dsk_dir}
cp ${HOME}/Desktop/VASSAL.desktop ${dsk_dir}/

echo -n "Updating Desktop database ... "
update-desktop-database ${dsk_dir}
echo "done"

mime_dir=${HOME}/.local/share/mime/
echo "Creating ~/.local/share/mime/packages/application-x-vassal.xml"
mkdir -p ${mime_dir}
cat <<EOF > ${mime_dir}/packages/application-x-vassal.xml
<?xml version="1.0"?>
<mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>
  <mime-type type="application/x-vassal-module">
    <comment>VASSAL module file</comment>
    <glob pattern="*.vmod"/>
  </mime-type>
  <mime-type type="application/x-vassal-log">
    <comment>VASSAL log file</comment>
    <glob pattern="*.vlog"/>
  </mime-type>
  <mime-type type="application/x-vassal-save">
    <comment>VASSAL save file</comment>
    <glob pattern="*.vsav"/>
  </mime-type>
</mime-info>
EOF

echo -n "Updating Mime database ... "
update-mime-database ${mime_dir}
echo "done"

# --- VNC password ---------------------------------------------------
cat <<EOF
Next, you need to set a VNC password that you must give when
connecting to the VNC server.  The password should be
relatively strong, but you should be able to remember it.
Note, only VNC clients on the current device may connect to
the VNC server.  If you need to reset your VNC password,
simply do

    vncpasswd

Please define your VNC password
EOF
vncpasswd

# --- Epilog ---------------------------------------------------------
cat <<EOF
You are now ready to launch VASSAL on your device.  Make
sure you have a VNC client app installed.

If you have installed the Termux-Widget package, go a head
and add a Termux widget to your home screen.  It should show
the entry "VASSAL".  Pressing that entry will launch your
VNC client and once connected you will see an X session with
VASSAL running.

Otherwise, run in Termux

    ~/.shortcuts/VASSAL &
    termux-open-url vnc://localhost:5901

Enjoy.
EOF

#
# EOF
#