// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Watchdog-protected loop receiver
// Not compiled or tested in-world
// Setup: Add bed in child. Root named sound_driver sends code 8051 and alive every two seconds. Owner-touch arms/disarms.
// Stop / restore: Owner-touch the script prim to stop an active session before removing or resetting it. Loop state can survive script removal; use Stop sound in this prim if necessary.
// Notes: Use licensed sounds in this prim. Audio is nearby, not private. Timer timing and asset loading are approximate; no sample synchronization is promised. Five seconds without a valid root heartbeat stops sound but leaves receiver armed. This is local coordination, not authenticated remote control.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer armed;
integer playing;
float until;
default
{
    touch_start(integer n)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        armed=!armed;
        playing=FALSE;
        llStopSound();
        llSetTimerEvent(0.0);
    }
    link_message(integer sender,integer code,string s,key data)
    {
        if(!armed||sender!=1||llGetLinkName(1)!="sound_driver"||code!=8051||s!="alive")return;
        if(llGetInventoryType("bed")!=INVENTORY_SOUND)return;
        until=llGetTime()+5.0;
        if(!playing)
        {
            playing=TRUE;
            llLoopSound("bed",0.2);
        }
        llSetTimerEvent(1.0);
    }
    timer()
    {
        if(llGetTime()>=until)
        {
            playing=FALSE;
            llStopSound();
            llSetTimerEvent(0.0);
        }
    }
    changed(integer change)
    {
        if(change&CHANGED_LINK)
        {
            armed=FALSE;
            playing=FALSE;
            llStopSound();
            llSetTimerEvent(0.0);
        }
    }
}