// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Three-station factory model
// Not compiled or tested in-world
// Setup: Enter add to queue a job or step to advance one pipeline tick. Owner-touch initializes; enter reset to restart. Text input closes after90seconds.
// Stop / restore: Close or ignore the text box, or remove the script. It changes no world objects, avatar state or inventory.
// Notes: Original bounded, manually stepped educational toy. Not a calibrated simulator, real-world control system, or live scientific measurement. Each tick completes station3, shifts stages, then loads one queued job. It creates no objects and controls no equipment.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer channel;
integer handle;
list pending;
list stations;
integer nextId;
integer complete;
close()
{
    if(handle)llListenRemove(handle);
    handle=0;
    llSetTimerEvent(0.0);
}
start()
{
    pending=[];
    stations=[0,0,0];
    nextId=1;
    complete=0;
}
string view()
{
    return "Waiting "+llList2CSV(pending)+" | stations "+llList2CSV(stations)+" | complete "+(string)complete;
}
show()
{
    llOwnerSay(view());
    if(!handle)
    {
        channel=-1000-(integer)llFrand(1000000.0);
        handle=llListen(channel,"",llGetOwner(),"");
    }
    llTextBox(llGetOwner(),"Enter add to queue a job or step to advance one pipeline tick. Type reset to restart.",channel);
    llSetTimerEvent(90.0);
}
default
{
    touch_start(integer n)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        close();
        start();
        show();
    }
    listen(integer incomingChannel,string name,key id,string s)
    {
        if(!handle||incomingChannel!=channel||id!=llGetOwner())return;
        s=llToLower(llStringTrim(s,STRING_TRIM));
        if(s=="reset")start();
        else
        {
            if(s=="add")
            {
                if(llGetListLength(pending)<8&&nextId<1000)pending+=[nextId++];
            }
            else if(s=="step")
            {
                if(llList2Integer(stations,2))++complete;
                integer first=0;
                if(llGetListLength(pending))
                {
                    first=llList2Integer(pending,0);
                    pending=llDeleteSubList(pending,0,0);
                }
                stations=[first,llList2Integer(stations,0),llList2Integer(stations,1)];
            }
        }
        show();
    }
    timer()
    {
        close();
    }
}