// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Manual reservoir valves
// Not compiled or tested in-world
// Setup: Enter inlet, drain or step. Valve commands toggle; step advances one arbitrary time unit. 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. The order is fill, drain, clamp. No fluid objects are created or real valves controlled.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer channel;
integer handle;
integer water;
integer inlet;
integer drain;
integer spilled;
close()
{
    if(handle)llListenRemove(handle);
    handle=0;
    llSetTimerEvent(0.0);
}
start()
{
    water=20;
    inlet=FALSE;
    drain=FALSE;
    spilled=0;
}
string view()
{
    return "Tank "+(string)water+"/100 | inlet "+(string)inlet+" drain "+(string)drain+" overflow "+(string)spilled;
}
show()
{
    llOwnerSay(view());
    if(!handle)
    {
        channel=-1000-(integer)llFrand(1000000.0);
        handle=llListen(channel,"",llGetOwner(),"");
    }
    llTextBox(llGetOwner(),"Enter inlet, drain or step. Valve commands toggle; step advances one arbitrary time unit. 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=="inlet")inlet=!inlet;
            else if(s=="drain")drain=!drain;
            else if(s=="step")
            {
                if(inlet)water+=7;
                if(drain)water-=4;
                if(water<0)water=0;
                if(water>100)
                {
                    spilled+=water-100;
                    water=100;
                }
            }
        }
        show();
    }
    timer()
    {
        close();
    }
}