#!/bin/bash

# Removes hibernation setup: disables swap, removes swapfile, removes fstab entry, and removes resume hook.

# Check if hibernation is configured
if [ ! -f /etc/mkinitcpio.conf.d/omarchy_resume.conf ] || ! grep -q "^HOOKS+=(resume)$" /etc/mkinitcpio.conf.d/omarchy_resume.conf; then
  echo "Hibernation is not set up"
  exit 0
fi

if gum confirm "Remove hibernation setup?"; then
  SWAP_SUBVOLUME="/swap"
  SWAP_FILE="$SWAP_SUBVOLUME/swapfile"
  MKINITCPIO_CONF="/etc/mkinitcpio.conf.d/omarchy_resume.conf"

  # Disable swap if active
  if swapon --show | grep -q "$SWAP_FILE"; then
    echo "Disabling swap on $SWAP_FILE"
    sudo swapoff "$SWAP_FILE"
  fi

  # Remove swapfile
  if [ -f "$SWAP_FILE" ]; then
    echo "Removing swapfile"
    sudo rm "$SWAP_FILE"
  fi

  # Remove swap subvolume
  if sudo btrfs subvolume show "$SWAP_SUBVOLUME" &>/dev/null; then
    echo "Removing Btrfs subvolume $SWAP_SUBVOLUME"
    sudo btrfs subvolume delete "$SWAP_SUBVOLUME"
  fi

  # Remove fstab entry
  if grep -Fq "$SWAP_FILE" /etc/fstab; then
    echo "Removing swapfile from /etc/fstab"
    sudo cp -a /etc/fstab "/etc/fstab.$(date +%Y%m%d%H%M%S).back"
    sudo sed -i "\|$SWAP_FILE|d" /etc/fstab
    # Also remove the comment line if present
    sudo sed -i '/^# Btrfs swapfile for system hibernation$/d' /etc/fstab
  fi

  # Remove mkinitcpio resume hook
  if [ -f "$MKINITCPIO_CONF" ]; then
    echo "Removing resume hook from $MKINITCPIO_CONF"
    sudo rm "$MKINITCPIO_CONF"

    echo "Regenerating initramfs..."
    sudo limine-mkinitcpio
  fi

  echo "Hibernation removed"
fi