#!/usr/bin/env bash

# This file is part of I38.

# I38 is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.

# I38 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE. See the GNU General Public License for more details.

# You should have received a copy of the GNU General Public License along with I38. If not, see <https://www.gnu.org/licenses/>.

# Move the mouse pointer to the center of the focused window.

if ! command -v xdotool &> /dev/null; then
    if command -v notify-send &> /dev/null; then
        notify-send "I38" "xdotool is required to move the mouse pointer."
    fi
    exit 1
fi

activeWindow="$(xdotool getactivewindow 2> /dev/null || true)"
if [[ "$activeWindow" =~ ^[0-9]+$ ]]; then
    while IFS='=' read -r key value; do
        case "$key" in
            X|Y|WIDTH|HEIGHT)
                if [[ "$value" =~ ^-?[0-9]+$ ]]; then
                    printf -v "$key" '%s' "$value"
                fi
                ;;
        esac
    done < <(xdotool getwindowgeometry --shell "$activeWindow" 2> /dev/null || true)
fi

if [[ "${X:-}" =~ ^-?[0-9]+$ ]] &&
    [[ "${Y:-}" =~ ^-?[0-9]+$ ]] &&
    [[ "${WIDTH:-}" =~ ^[0-9]+$ ]] &&
    [[ "${HEIGHT:-}" =~ ^[0-9]+$ ]] &&
    [[ "$WIDTH" -gt 0 ]] &&
    [[ "$HEIGHT" -gt 0 ]]; then
    pointerX=$((X + WIDTH / 2))
    pointerY=$((Y + HEIGHT / 2))
else
    read -r displayWidth displayHeight < <(xdotool getdisplaygeometry)
    pointerX=$((displayWidth / 2))
    pointerY=$((displayHeight / 2))
fi

xdotool mousemove "$pointerX" "$pointerY"