#!/usr/bin/env bash
# Apps opened at login. Run once per login by autostart-apps.service (see
# modules/home/services.nix), after Waybar, so the tray exists.
#
#   OpenDeck, WowUp   to the tray
#   Faugus            its window on workspace 1
#   Signal, Discord   workspace 3, Signal on top and Discord below it
#
# Which workspace a window lands on (and Faugus' position) is decided by the
# temporary "startup-*" window rules in startup.lua, which also closes the window
# WowUp opens. This script starts the apps and then stacks Signal
# above Discord. Apps that are already running are left alone, so it is safe to run
# again by hand.

SIGNAL_HEIGHT=802 # px; Discord gets the rest of the (portrait) monitor

running() { pgrep -f "$1" >/dev/null 2>&1; }
# Each app is started as its own systemd service (app-*.service), with systemd as
# its parent rather than this script: Discord and WowUp run in a bubblewrap
# sandbox that exits with its parent process, so they would close as soon as
# this script finished. `systemctl --user list-units 'app-*'` shows them.
launch() { uwsm app -t service -- "$@" >/dev/null 2>&1; }
dispatch() { hyprctl dispatch "$1" >/dev/null 2>&1; }

# Tray apps only show an icon if the tray already exists when they start.
for _ in $(seq 40); do
  busctl --user status org.kde.StatusNotifierWatcher >/dev/null 2>&1 && break
  sleep 0.5
done

# OpenDeck starts hidden with its flag. WowUp has one too but shows its window
# anyway; startup.lua closes that window (see "startup-wowup" there).
running '(^|/)\.?opendeck(-wrapped)? ' || launch opendeck --hide
running 'wowup-cf' || launch wowup-cf --hidden
running 'faugus\.(launcher|tray_only)' || launch faugus-launcher
running 'signal-desktop.*/app\.asar' || launch signal-desktop # themed, see pkgs/signal-desktop-themed
running '/Discord( |$)' || launch discord

# --- Stack Signal above Discord ------------------------------------------------

# Prints "address y width height" of the first mapped, tiled window whose class is $1,
# ignoring small ones (Discord's updater splash).
window() {
  hyprctl clients -j | python3 -c '
import json, sys
for c in json.load(sys.stdin):
    if c["class"] == sys.argv[1] and c.get("mapped", True) and not c["floating"] and c["size"][0] > 500:
        print(c["address"], c["at"][1], c["size"][0], c["size"][1])
        break
' "$1"
}

for _ in $(seq 180); do
  read -r signal_addr signal_y signal_w signal_h <<<"$(window signal)"
  read -r discord_addr discord_y _ _ <<<"$(window discord)"
  [ -n "$signal_addr" ] && [ -n "$discord_addr" ] && break
  sleep 0.5
done
[ -n "$signal_addr" ] && [ -n "$discord_addr" ] || exit 0

if [ "$signal_y" -gt "$discord_y" ]; then
  dispatch "hl.dsp.window.move({ direction = \"u\", window = \"address:$signal_addr\" })"
  sleep 0.3
  read -r signal_addr signal_y signal_w signal_h <<<"$(window signal)"
fi
if [ "$signal_h" != "$SIGNAL_HEIGHT" ]; then
  dispatch "hl.dsp.window.resize({ x = $signal_w, y = $SIGNAL_HEIGHT, window = \"address:$signal_addr\" })"
fi