#!/usr/bin/env bash
# rice-panel <name> | close | list
#
# Opens one eww popup at a time (opening one closes the other). A transparent
# full-screen "closer" window sits underneath, so a click anywhere else closes
# it, and a throwaway sxhkd grabs Escape for as long as a panel is open.
set -uo pipefail

cfg="$HOME/.config/eww"
panels="hub audio network bluetooth display power media calendar notifications"

e() { eww -c "$cfg" "$@"; }

ensure_daemon() {
  pgrep -u "$UID" -x eww >/dev/null && return 0
  setsid -f eww -c "$cfg" daemon >/dev/null 2>&1
  for _ in {1..50}; do e ping >/dev/null 2>&1 && return 0; sleep 0.1; done
}

open_windows() { e active-windows 2>/dev/null | cut -d: -f1; }

# Line panels up with tiled windows. bspwm draws the border inside the gap, so a
# window's outer edge is exactly one gap below the bar and in from the screen's
# right edge; ask it for the live numbers instead of hard-coding them.
position() {
  local pt pr gap
  read -r pt pr gap < <(bspc query -T -m 2>/dev/null |
    jq -r '[.padding.top, .padding.right, .windowGap] | @tsv' 2>/dev/null)
  pt=${pt:-37} pr=${pr:-0} gap=${gap:-10}
  case "$1" in
    media|calendar) echo "0x$(( pt + gap ))" ;;
    *)              echo "$(( -(pr + gap) ))x$(( pt + gap ))" ;;
  esac
}

close_all() {
  local w
  for w in $(open_windows); do
    [[ " $panels closer " == *" $w "* ]] && e close "$w" >/dev/null 2>&1
  done
  pkill -u "$UID" -f "sxhkd -c $cfg/panel-keys" 2>/dev/null
  pgrep -u "$UID" -x eww >/dev/null && e update open_panel="" >/dev/null 2>&1
  return 0
}

case "${1:-close}" in
  close) close_all ;;
  list)  tr ' ' '\n' <<<"$panels" ;;
  *)
    name="$1"
    [[ " $panels " == *" $name "* ]] || { echo "rice-panel: unknown panel '$name' (try: rice-panel list)" >&2; exit 2; }
    ensure_daemon
    if open_windows | grep -qx "$name"; then
      close_all
    else
      close_all
      [[ $name == calendar ]] && e update cal_offset=0 cal_day=""
      e update open_panel="$name"
      e open closer
      e open "$name" --pos="$(position "$name")"
      setsid -f sxhkd -c "$cfg/panel-keys" >/dev/null 2>&1
    fi
    ;;
esac