#!/usr/bin/env bash
# ~/.config/hypr/scripts/lid-handler.sh
# Handles laptop lid close/open events for Hyprland.
# Called by Hyprland bindl (runs in user session context).
# Usage: lid-handler.sh close|open

set -euo pipefail

EVENT="${1:-}"  # "close" or "open"

# Determine lid state if not provided
if [ -z "$EVENT" ]; then
    LID_STATE=$(cat /proc/acpi/button/lid/LID0/state 2>/dev/null || cat /proc/acpi/button/lid/LID/state 2>/dev/null || echo "open")
    if echo "$LID_STATE" | grep -qi "closed"; then
        EVENT="close"
    else
        EVENT="open"
    fi
fi

# Detect monitors via hyprctl
INTERNAL=$(hyprctl monitors -j 2>/dev/null | jq -r '.[] | select(.name | startswith("eDP")) | .name' | head -1 || echo "")
EXTERNAL=$(hyprctl monitors -j 2>/dev/null | jq -r '.[] | select(.name | startswith("eDP") | not) | .name' | head -1 || echo "")

# Fallback: try known names from hyprland.conf
[ -z "$INTERNAL" ] && INTERNAL="eDP-1"
[ -z "$EXTERNAL" ] && EXTERNAL="DP-3"

case "$EVENT" in
    close)
        if [ -n "$EXTERNAL" ]; then
            # Move all workspaces to the external display first
            WORKSPACES=$(hyprctl workspaces -j 2>/dev/null | jq -r '.[].id' || echo "")
            for ws in $WORKSPACES; do
                hyprctl dispatch moveworkspacetomonitor "$ws" "$EXTERNAL" 2>/dev/null || true
            done
            # Set external as primary (scale factor 1)
            hyprctl keyword monitor "$EXTERNAL",preferred,auto,1 2>/dev/null || true
            # Disable internal display
            if [ -n "$INTERNAL" ]; then
                hyprctl keyword monitor "$INTERNAL,disable" 2>/dev/null || true
            fi
            notify-send -t 3000 "Lid Closed" "Switched to $EXTERNAL as primary display"
        else
            notify-send -t 3000 "Lid Closed" "No external display detected — locking"
            hyprlock 2>/dev/null || true
        fi
        ;;
    open)
        # Re-enable internal display alongside external
        if [ -n "$INTERNAL" ]; then
            hyprctl keyword monitor "$INTERNAL,preferred,auto,1" 2>/dev/null || true
            notify-send -t 3000 "Lid Opened" "Internal display $INTERNAL re-enabled"
        fi
        ;;
esac