// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Backward word practice
// Not compiled or tested in-world
// Setup: Owner-touch, then type the forward spelling of the displayed reverse word.
// Stop / restore: Stop responding and the listener closes after 90 seconds, or remove/disable the script. Owner-touch restarts the exercise.
// Notes: Owner-only local exercise; no prizes, visitor records, network service, or persistent scores. A short language/pattern toy, separate from an arbitrary letter shuffle.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer channel;
integer handle;
close()
{
    if(handle)llListenRemove(handle);
    handle=0;
    llSetTimerEvent(0.0);
}
ask(string prompt)
{
    if(!handle)
    {
        channel=-1000-(integer)llFrand(1000000.0);
        handle=llListen(channel,"",llGetOwner(),"");
    }
    llTextBox(llGetOwner(),prompt,channel);
    llSetTimerEvent(90.0);
}
list words=["garden","planet","window","ribbon","marble"];
string secret;
start()
{
    secret=llList2String(words,(integer)llFrand((float)llGetListLength(words)));
    string reverse="";
    integer i;
    for(i=llStringLength(secret)-1;i>=0;--i)reverse+=llGetSubString(secret,i,i);
    ask("Read this backward word: "+reverse);
}
answer(string s)
{
    if(llToLower(s)==secret)
    {
        close();
        llOwnerSay("Correct: "+secret);
    }
    else ask("Try the forward spelling again.");
}
default
{
    touch_start(integer count)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        close();
        start();
    }
    listen(integer ch,string name,key id,string message)
    {
        if(!handle||ch!=channel||id!=llGetOwner())return;
        answer(llStringTrim(message,STRING_TRIM));
    }
    timer()
    {
        close();
        llOwnerSay("Exercise paused. Touch to restart.");
    }
    changed(integer change)
    {
        if(change&CHANGED_OWNER)llResetScript();
    }
}