#!/bin/bash

# Function to check if a package is installed
is_installed() {
  pacman -Qi "$1" &> /dev/null
}

# Function to check if a package is installed
is_group_installed() {
  pacman -Qg "$1" &> /dev/null
}

# Function to install packages if not already installed
install_packages() {
  local packages=("$@")
  local to_install=()

  for pkg in "${packages[@]}"; do
    if ! is_installed "$pkg" && ! is_group_installed "$pkg"; then
      to_install+=("$pkg")
    fi
  done

  if [ ${#to_install[@]} -ne 0 ]; then
    echo "Installing: ${to_install[*]}"
    yay -S --noconfirm --answerdiff=None --answeredit=None --answerclean=None "${to_install[@]}"
  fi
}

# Function to remove pacman/AUR packages if installed
remove_packages() {
  local packages=("$@")
  local to_remove=()

  for pkg in "${packages[@]}"; do
    if is_installed "$pkg"; then
      to_remove+=("$pkg")
    fi
  done

  if [ ${#to_remove[@]} -ne 0 ]; then
    echo "Removing: ${to_remove[*]}"
    sudo pacman -Rns --noconfirm "${to_remove[@]}"
  fi
}

# Function to enable systemd services if not already enabled
enable_services() {
  for service in "$@"; do
    if ! systemctl is-enabled "$service" &> /dev/null; then
      echo "Enabling $service..."
      sudo systemctl enable "$service"
    else
      echo "$service is already enabled."
    fi
  done
}

# Output of the last update's pacman -Su, written by updates.d/10-pacman.sh
PACMAN_UPDATE_LOG="$HOME/.local/state/miniserver/pacman-update.log"

# True if the last update rebuilt the initramfs and mkinitcpio reported a
# failure. Rebooting then can leave the machine unbootable.
initramfs_build_failed() {
  [ -f "$PACMAN_UPDATE_LOG" ] || return 1
  grep -q "Updating linux initcpios" "$PACMAN_UPDATE_LOG" || return 1
  grep -q "==> ERROR" "$PACMAN_UPDATE_LOG" || ! grep -q "Image generation successful" "$PACMAN_UPDATE_LOG"
}

# Install a script atomically (copy to a temp file, then rename over the target)
# so a copy of it that is running right now keeps reading the old file
install_script() {
  local tmp
  tmp="$(mktemp "$2.XXXXXX")" && cp "$1" "$tmp" && chmod 755 "$tmp" && mv -f "$tmp" "$2"
}