#!/bin/bash

LOCK="/var/run/controller-inactivity-checker.lock"
if [ -f "$LOCK" ]; then
    exit 1
fi

trap 'rm -f "$LOCK"; exit 0' SIGTERM EXIT
touch "$LOCK"

STATE="active"
JS_DEVICES=()

TIMER="$(/usr/bin/batocera-settings-get system.controllerinactivitytimer)"
if [[ -z "$TIMER" || ! "$TIMER" =~ ^[0-9]+$ || "$TIMER" -le 60 ]]; then
    TIMER="900" # default in seconds
    /usr/bin/batocera-settings-set system.controllerinactivitytimer "$TIMER"
fi

js_update() {
    JS_DEVICES=()
    for js_device in /dev/input/js*; do
        if [ -e "$js_device" ]; then
            JS_DEVICES+=("$js_device")
        fi
    done
}

do_inactivity() {
    STATE="inactive"
    # your code here
}

do_activity() {
    STATE="active"
    # your code here
}

monitor_controllers() {
    local JS_REFRESH_INTERVAL=10 # Number of loops before controller refresh (by default 1 loop per second)
    LOOP_COUNT=0 # This should always be 0

    while true; do
        if (( LOOP_COUNT % JS_REFRESH_INTERVAL == 0 )); then
            js_update
        fi

        for i in "${!JS_DEVICES[@]}"; do
            js="${JS_DEVICES[$i]}"

        if [ -e "$js" ]; then
            if timeout 1 jstest --event "$js" | tail -n +25 | grep -q "Event"; then
                LOOP_COUNT=0
                JS_DEVICES=("$js" "${JS_DEVICES[@]:0:$i}" "${JS_DEVICES[@]:$((i + 1))}")
                if [ "$STATE" = "inactive" ]; then
                    do_activity
                fi
                break
            fi
        fi
        done

        ((LOOP_COUNT++))
        if (( LOOP_COUNT >= TIMER )); then
            if [ "$STATE" = "active" ]; then
                do_inactivity
            fi
        fi
    done
}

js_update
monitor_controllers

exit 0