// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Three-rod abacus trainer
// Not compiled or tested in-world
// Setup: Enter one,ten,hundred or down. Range0-999; down subtracts one. 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. Digits are represented separately; this is not an automatic representation of every physical abacus tradition.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer channel;
integer handle;
integer value;
close()
{
    if(handle)llListenRemove(handle);
    handle=0;
    llSetTimerEvent(0.0);
}
start()
{
    value=0;
}
string view()
{
    string text=(string)value+" | H T U rods: ";
    integer divisor=100;
    integer i;
    for(i=0;i<3;++i)
    {
        integer digit=(value/divisor)%10;
        text+="["+(string)(digit/5)+" five + "+(string)(digit%5)+" ones] ";
        divisor/=10;
    }
    return text;
}
show()
{
    llOwnerSay(view());
    if(!handle)
    {
        channel=-1000-(integer)llFrand(1000000.0);
        handle=llListen(channel,"",llGetOwner(),"");
    }
    llTextBox(llGetOwner(),"Enter one,ten,hundred or down. Range0-999; down subtracts one. 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
        {
            integer next=value;
            if(s=="one")++next;
            else if(s=="ten")next+=10;
            else if(s=="hundred")next+=100;
            else if(s=="down")--next;
            if(next>=0&&next<=999)value=next;
            else llOwnerSay("Outside three-rod range.");
        }
        show();
    }
    timer()
    {
        close();
    }
}