#!/usr/bin/perl -slw

use strict;
use Tk;
use AnyEvent;
use POSIX qw(:sys_wait_h);
use Term::ReadLine;
use IO::File;

use 5.12.1;

sub LOG {
    state $fh;
    open $fh, '>', '/tmp/sopw.out' unless $fh;
    die $! unless $fh;
    autoflush $fh 1;

    say $fh @_;

}

package Term::ReadLine::AE;

unshift @Term::ReadLine::Stub::ISA, __PACKAGE__;

#use Data::Dump qw(ddx);
#ddx(\%INC);

if ( not defined &Tk::DoOneEvent ) {
    ::LOG("overriding");
    *Tk::DoOneEvent = sub {
        AnyEvent->_poll();
    };
    ::LOG("Not created?") unless defined &Tk::DoOneEvent;
}

our $cv;

sub Tk_loop {
    my $self = shift;
    ::LOG("Entering Tk_loop");  
    $cv = AE::cv;
    $cv->recv();
}

sub register_Tk {
    my $self = shift;
    ::LOG("Registering");
    $Term::ReadLine::registered++
      or AE::io( $self->IN, 0, sub { $cv->send() } );
}

package main;
use 5.12.1;

my $esc;

BEGIN { $esc = "\x1b[";
    print "${esc}2J";
}
 
my $t = 0;
my $w = AE::timer( 0, 1, sub { print "${esc}s${esc}1H$t s   ${esc}u"; ++$t } );

my $term   = Term::ReadLine->new('AE');
my $OUT    = $term->OUT || \*STDOUT;
my $prompt = "Finished";
my $cmd;

while (defined( $cmd = $term->readline('>') )) {
    my @output = `$cmd`;
    my $exit_value  = $? >> 8;
    my $signal_num  = $? & 127;
    my $dumped_core = $? & 128;
    printf $OUT "Program terminated with status %d from signal %d%s\n",
           $exit_value, $signal_num, 
           $dumped_core ? " (core dumped)" : "";
    say @output;
    $term->addhistory;
    $term->tkRunning(1);
    say $prompt;
    exit;
}