#!/usr/bin/env bash
# monitor-status: waybar module for external display layout.
#
# Emits a JSON update on stdout every couple of seconds so the module appears
# as soon as an external (non-eDP/HEADLESS) monitor is detected and collapses
# again when it is disconnected. Clicking the icon opens monique to manage the
# display layout.
#
# Outputs (return-type json):
#   connected: { "text": "󰍹", "class": "active", "tooltip": "<monitor list>" }
#   otherwise: { "text": "", "class": "hidden", "tooltip": "" }

set -uo pipefail

POLL_SECONDS=2

emit() {
  local out_json
  out_json="$(hyprctl monitors -j 2>/dev/null)" || {
    echo '{"text":"","class":"hidden","tooltip":""}'
    return
  }
  jq -c '
    [.[] | select((.name | test("^(eDP|HEADLESS)-")) | not)] as $ext |
    if ($ext | length) == 0 then
      { text: "", class: "hidden", tooltip: "" }
    else
      { text: "󰍹",
        class: "active",
        tooltip: (($ext | map("\(.description)  \(.width)x\(.height) @ \(.refreshRate | floor) Hz") | join("\n"))) }
    end
  ' <<<"$out_json" 2>/dev/null || echo '{"text":"","class":"hidden","tooltip":""}'
}

while true; do
  emit
  sleep "$POLL_SECONDS"
done