#!/bin/bash

# omarchy:summary=Send a fire-and-forget IPC call to a running omarchy-shell
# omarchy:hidden=true

OMARCHY_PATH=${OMARCHY_PATH:-$HOME/.local/share/omarchy}
SHELL_QML="$OMARCHY_PATH/default/quickshell/omarchy-shell/shell.qml"

if (( $# < 2 )); then
  echo "Usage: omarchy-shell-ipc-fast <target> <function> [args...]" >&2
  exit 1
fi

perl -MCwd=abs_path -MEncode=encode,decode -MSocket \
  -e '
    sub read_qstring {
      my ($data, $offset) = @_;
      return ("", $offset) if $offset + 4 > length($data);
      my $length = unpack("N", substr($data, $offset, 4));
      $offset += 4;
      return ("", $offset) if $length == 0xffffffff || $offset + $length > length($data);
      return (decode("UTF-16BE", substr($data, $offset, $length)), $offset + $length);
    }

    sub qstring {
      my $encoded = encode("UTF-16BE", $_[0] // "");
      return pack("N", length($encoded)) . $encoded;
    }

    my $shell_qml = abs_path(shift @ARGV);
    my $target = shift @ARGV;
    my $function = shift @ARGV;
    my @args = @ARGV;
    my $runtime_dir = $ENV{"XDG_RUNTIME_DIR"} || "/run/user/$<";
    my $payload = chr(3) . qstring($target) . qstring($function) . pack("N", scalar @args) . join("", map { qstring($_) } @args);
    my @candidates;

    for my $lock_path (glob("$runtime_dir/quickshell/by-id/*/instance.lock")) {
      my $data;
      next unless open(my $lock, "<:raw", $lock_path);
      { local $/; $data = <$lock>; }
      close($lock);
      my (undef, $offset) = read_qstring($data, 0);
      my ($path) = read_qstring($data, $offset);
      next unless $path && abs_path($path) eq $shell_qml;
      (my $socket_path = $lock_path) =~ s{/instance\.lock$}{/ipc.sock};
      push @candidates, [(stat($lock_path))[9] || 0, $socket_path];
    }

    for my $candidate (sort { $b->[0] <=> $a->[0] } @candidates) {
      socket(my $client, AF_UNIX, SOCK_STREAM, 0) || next;
      if (connect($client, sockaddr_un($candidate->[1]))) {
        syswrite($client, $payload);
        close($client);
        exit 0;
      }
      close($client);
    }

    exit 1;
  ' "$SHELL_QML" "$@"