#!/usr/bin/env bash
# Laptop-only dynamic monitor placement: whenever a display is plugged or
# unplugged, arrange active outputs left-to-right in output_order() order
# (external display(s) first, internal panel last), so a newly connected
# external monitor gets a sensible position automatically without any
# manual config. On the desktop this exits immediately — that monitor
# pair has a fixed physical arrangement set statically in
# conf.d/10-appearance.conf.
set -Eeuo pipefail
SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/lib-outputs.sh"

is_laptop || exit 0

apply_layout() {
  local outputs_json x=0 name width
  outputs_json=$(swaymsg -t get_outputs -r)
  mapfile -t ordered < <(output_order)
  for name in "${ordered[@]}"; do
    width=$(jq -r --arg n "$name" '.[] | select(.name==$n) | .rect.width' <<<"$outputs_json")
    swaymsg output "$name" position "$x" 0 >/dev/null 2>&1 || true
    x=$((x + width))
  done
}

apply_layout
swaymsg -t subscribe -m '["output"]' | while read -r _; do
  apply_layout
done