#!/bin/bash
# Aggressive display keep-alive for Raspberry Pi
# Prevents HDMI from powering down

DISPLAY_TIMEOUT=30

while true; do
    # Keep HDMI powered on (tvservice command)
    if command -v tvservice &> /dev/null; then
        /usr/bin/tvservice -p 2>/dev/null
    fi
    
    # Disable screensaver
    if command -v xset &> /dev/null; then
        DISPLAY=:0 xset s off 2>/dev/null
        DISPLAY=:0 xset -dpms 2>/dev/null
        DISPLAY=:0 xset dpms force on 2>/dev/null
        DISPLAY=:0 xset s reset 2>/dev/null
    fi
    
    # Move mouse to trigger activity
    if command -v xdotool &> /dev/null; then
        DISPLAY=:0 xdotool mousemove_relative 1 1 2>/dev/null
        DISPLAY=:0 xdotool mousemove_relative -1 -1 2>/dev/null
    fi
    
    # Disable monitor power saving
    if command -v xrandr &> /dev/null; then
        DISPLAY=:0 xrandr --output HDMI-1 --power-profile performance 2>/dev/null || true
    fi
    
    sleep $DISPLAY_TIMEOUT
done