#!/usr/bin/env bash
OUTPUT="${1:-DP-2}"

get_socket() {
  local runtime="${XDG_RUNTIME_DIR:-/run/user/$(id -u)}"
  local sig
  sig=$(ls "$runtime/hypr/" 2>/dev/null | head -n1)
  echo "$runtime/hypr/$sig/.socket2.sock"
}

emit() {
  local monitor_ws title

  monitor_ws=$(hyprctl monitors -j 2>/dev/null \
    | jq -r ".[] | select(.name==\"$OUTPUT\") | .activeWorkspace.id")

  title=$(hyprctl clients -j 2>/dev/null \
    | jq -r ".[] | select(.workspace.id==$monitor_ws and .focusHistoryID==0) | .title" \
    | head -n1)

  printf '%s\n' "${title:-}"
}

emit

SOCKET=$(get_socket)

socat -u "UNIX-CONNECT:$SOCKET" - \
  | stdbuf -oL grep -E "^(activewindow|focusedmon|workspace|closewindow)>" \
  | while IFS= read -r _; do
      sleep 0.05
      emit
    done