#!/bin/bash

# Prepare variables
: "${VNC_BUILTIN_WIDTH:=1280}"
: "${VNC_BUILTIN_HEIGHT:=720}"
: "${VNC_BUILTIN_PIXELDEPTH:=24}"
: "${VNC_BUILTIN_DISABLED:=false}"

if [ "${VNC_BUILTIN_DISABLED}" = true ]; then
    echo "Builtin VNC is disabled. You must ensure the DISPLAY variable is set and the target display is accessible"
    echo "Using display ${DISPLAY}"
else
    echo "Builtin VNC is enabled. The DISPLAY variable will be ignored and overwritten"
    export DISPLAY=":0"

    echo "Using display ${DISPLAY} with size of ${VNC_BUILTIN_WIDTH}x${VNC_BUILTIN_HEIGHT} and pixel depth ${VNC_BUILTIN_PIXELDEPTH}"
    Xvfb ${DISPLAY} -screen 0 "${VNC_BUILTIN_WIDTH}x${VNC_BUILTIN_HEIGHT}x${VNC_BUILTIN_PIXELDEPTH}" &
fi

# Wait for the display to become ready
while true
do
    if xdpyinfo -display "${DISPLAY}" > /dev/null 2>&1; then
        echo "Display ${DISPLAY} is ready!"
        break
    else
        echo "Waiting for display ${DISPLAY} to become ready..."
        sleep 0.25
    fi
done

# Launch the VNC server if enabled
if [ "${VNC_BUILTIN_DISABLED}" != true ]; then
    x11vnc -bg -forever -nopw -display ${DISPLAY} &
fi

# Launch OpenBox
openbox &