#!/usr/bin/perl

use strict;
use warnings;

# Workspace to push the terminal to when dismissed
my $hidden = 'grave';
# Terminal application used for pop-up (swaymsg 'name')
my $term = 'uxterm';

use JSON::XS;
my $json = JSON::XS->new();

my $raw = join("\n",`swaymsg -t get_tree`);

my $root = $json->decode($raw);

# Get focused
my $display = $root->{focus}->[0];
my ($workspace, $term_id, $term_ws);
foreach my $d (@{$root->{nodes}}) {
    # If both the current workspace and terminal have been found, nothing else to look for
    if (defined($workspace) && defined($term_id)) {
        last;
    # If the display from this iteration of the loop is in focus, look for the active workspace
    } elsif ($d->{id} eq $display) {
        foreach my $w (@{$d->{nodes}}) {
            # Again, if both found, skip
            if (defined($workspace) && defined($term_id)) {
                last;
            # Otherwise if the current workspace is active, mark it
            } elsif ($w->{id} eq $d->{focus}->[0]) {
                $workspace = $w->{name};
            }
            # In any case, look for the terminal app
            foreach my $n (@{$w->{floating_nodes}}) {
                if ($n->{name} eq $term) {
                    $term_id = $n->{id};
                    $term_ws = $w->{name};
                    last;
                }
            }
        }
    # All other displays only need to be quickly searched for the term_id
    } else {
        foreach my $w (@{$d->{nodes}}) {
            if (defined($term_id)) {
                last;
            }
            foreach my $n (@{$w->{floating_nodes}}) {
                if ($n->{name} eq $term) {
                    $term_id = $n->{id};
                    $term_ws = $w->{name};
                    last;
                }
            }
        }
    }
}
print "Active workspace = $workspace\nTerminal ID = $term_id\nTerminal WS = $term_ws\n";

# If there is no terminal found, spawn one
if (!defined($term_id)) {
    print "No term running, starting one\n";
    exec $term
# If the current workspace is known and terminal isn't on it, bring and give focus
} elsif ($workspace != $term_ws) {
    print "Term not on current workspace, bringing it\n";
    `swaymsg "[con_id=$term_id]" move workspace $workspace`;
    `swaymsg "[con_id=$term_id]" focus`;
# Otherwise hide it from whereever it is
} else {
    print "Term is on current workspace or lost, moving to $hidden\n";
    `swaymsg "[con_id=$term_id]" move workspace $hidden`;
}