#!/usr/bin/env bash
# Toggle: mirror the internal display to the first connected external monitor.
# Travel use case — plug into a conference room TV/projector via HDMI, press
# the bound key, and the external mirrors the laptop. Press again to revert
# to the host's default monitor layout (via hyprctl reload).

set -u

internal="eDP-1"

external=$(hyprctl monitors -j | jq -r ".[] | select(.name != \"$internal\") | .name" | head -n1)

if [[ -z "$external" ]]; then
    notify-send "Mirror" "No external display connected"
    exit 0
fi

mirror_of=$(hyprctl monitors -j | jq -r ".[] | select(.name == \"$external\") | .mirrorOf // \"\"")

if [[ -n "$mirror_of" ]]; then
    hyprctl reload
    notify-send "Mirror" "Off — reverted to default layout"
else
    hyprctl keyword monitor "$external,preferred,auto,1,mirror,$internal"
    notify-send "Mirror" "On — $internal → $external"
fi