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#!/bin/sh

# local backup
backup_path="/mnt/second/backup"
dot_path="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}"
git_path="$HOME/Private/repos"
pass_path="${PASSWORD_STORE_DIR:-${XDG_DATA_HOME:-${HOME}/.local/share}/.password-store}/exported_keys"
suck_path="${XDG_SOURCES_HOME:-${HOME}/.local/src}/suckless"
user_home=$(eval echo ~"$USER")

# targets
bash_path="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/ar/.config/bash"
shell_path="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/ar/.config/shell"
vim_path="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/ar/.config/vim"
thesiah_path="${THESIAH_WWW:-${HOME}/Private/repos/THESIAH}/public"
lf_path="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/ar/.config/lf"

usage() {
  echo "Synchronize files and save them in backup path."
  echo ""
  echo "Usage: ${0##*/} [OPTIONS]"
  echo ""
  echo "Options:"
  echo "  -h, --help      Show this help message"
  echo "  -r, --root      Sync root files only"
  echo ""
  echo "Example:"
  echo "  ${0##*/}             # Sync all files to backup path"
  echo "  ${0##*/} --root      # Sync root files only"
  exit 0
}

error() {
  printf "%s\n" "$1" >&2
  exit 1
}

mount_luks() {
  if ! mount | grep -q " /mnt/second "; then
    size_nvme0=$(sudo blockdev --getsize64 /dev/nvme0n1p1)
    size_nvme1=$(sudo blockdev --getsize64 /dev/nvme1n1p1)
    [ "$size_nvme1" -lt "$size_nvme0" ] && target_device="/dev/nvme0n1p1" || target_device="/dev/nvme1n1p1"
    ${TERMINAL:-st} -n floatterm -g 60x1 -e sudo cryptsetup open "$target_device" "second"
    sudo -A mount "/dev/mapper/second" "/mnt/second" -o uid="$(id -u)",gid="$(id -g)" 2>/dev/null || sudo -A mount "/dev/mapper/second" "/mnt/second"
  fi
}

# Using a loop over space-separated strings instead of an array
sync_files() {
  for source in "$dot_path" "$git_path" "$pass_path" "$suck_path"; do
    rsync -vrazPlu --exclude=".music.txt" --delete "$source" "$backup_path/" >/dev/null 2>&1 || {
      echo "Failed to sync $(basename "$source")"
    }
  done
}

sync_root() {
  # clean targets
  sudo rm -rf /root/.config /root/.bash_history /root/.local/share/history
  sudo mkdir -p /root/.config/bash /root/.config/lf /root/.config/shell /root/.config/vim /root/.local/bin /root/.local/share/history/vim_history /root/.local/state

  # Root configuration synchronization on local system
  sudo rsync -vrazPlu --delete "$vim_path/vimrc" "/root/.config/vim/" >/dev/null 2>&1
  sudo rsync -vrazPlu --delete "$lf_path" "/root/.config/" >/dev/null 2>&1
  sudo mv -f "/root/.config/lf/rooticons" "/root/.config/lf/icons" >/dev/null 2>&1
  sudo rsync -vrazPlu --delete "$bash_path" "/root/.config/" >/dev/null 2>&1
  sudo rsync -vrazPlu --delete "$shell_path/inputrc" "/root/.config/shell/" >/dev/null 2>&1

  # load shortcuts
  shortcuts >/dev/null 2>&1

  # Modify root's Bash and LF configuration to include user-specific settings
  echo "[ -f \"$user_home/.config/shell/shortcutrc\" ] && source \"$user_home/.config/shell/shortcutrc\"" | sudo tee -a /root/.config/bash/bashrc >/dev/null 2>&1
  echo "[ -f \"$user_home/.config/shell/zshnameddirrc\" ] && source \"$user_home/.config/shell/zshnameddirrc\"" | sudo tee -a /root/.config/bash/bashrc >/dev/null 2>&1
  sudo sed -i "s|source[[:space:]]*\"\?~/.config/lf/shortcutrc\"\?|source \"$user_home/.config/lf/shortcutrc\"|" /root/.config/lf/lfrc >/dev/null 2>&1
  sudo grep -q "source \"\?/root/.config/lf/rootshortcutrc\"\?" /root/.config/lf/lfrc ||
    sudo sed -i "\|source \"\?$user_home/.config/lf/shortcutrc\"\?|a source \"/root/.config/lf/rootshortcutrc\"" /root/.config/lf/lfrc

  # Final ownership and link adjustments
  sudo chown -R root:root /root/.config/ >/dev/null 2>&1
  sudo ln -sf /root/.config/bash/bashrc /root/.bashrc >/dev/null 2>&1
  sudo ln -sf /root/.config/bash/bash_profile /root/.bash_profile >/dev/null 2>&1
  sudo ln -sf /root/.config/shell/inputrc /root/.inputrc >/dev/null 2>&1
  sudo ln -sf /root/.config/vim/vimrc /root/.vimrc >/dev/null 2>&1
}

sync_server() {
  # clean targets
  ssh "$THESIAH_SERVER" "rm -rf /root/.config /var/www/thesiah"
  ssh "$THESIAH_SERVER" "mkdir -p /root/.config/bash /root/.config/shell /root/.config/vim /root/.local/bin /root/.local/share /root/.local/state /var/www/thesiah"

  # Sync operations with explicit error checking
  cd "$THESIAH_WWW" || return 1
  [ -d "$thesiah_path" ] || hugo --cleanDestinationDir
  rsync -vrazPlu --delete "$thesiah_path/" "$THESIAH_SERVER:/var/www/thesiah/" >/dev/null 2>&1 && rm -rf "$thesiah_path"
  rsync -vrazPlu --delete "$vim_path/vimrc" "$THESIAH_SERVER:/root/.config/vim/" >/dev/null 2>&1
  rsync -vrazPlu --delete "$shell_path/inputrc" "$THESIAH_SERVER:/root/.config/shell/" >/dev/null 2>&1
  sudo cp /root/.config/shell/rootshortcutrc ~/.cache/
  sudo chown -R "$USER":wheel ~/.cache/rootshortcutrc
  rsync -vrazPlu --remove-source-files "$HOME/.cache/rootshortcutrc" "$THESIAH_SERVER:/root/.config/shell/" >/dev/null 2>&1

  # Adding custom shortcuts to root's shell configuration on the remote system
  ssh "$THESIAH_SERVER" "echo 'web=\"cd /var/www && ls -A\" \\' >> /root/.config/shell/rootshortcutrc"
  ssh "$THESIAH_SERVER" "echo 'wen=\"cd /var/www/nextcloud && ls -A\" \\' >> /root/.config/shell/rootshortcutrc"
  ssh "$THESIAH_SERVER" "echo 'wep=\"cd /var/www/prosody && ls -A\" \\' >> /root/.config/shell/rootshortcutrc"
  ssh "$THESIAH_SERVER" "echo 'wet=\"cd /var/www/thesiah && ls -A\" \\' >> /root/.config/shell/rootshortcutrc"
  ssh "$THESIAH_SERVER" "echo 'gng=\"cd /etc/nginx/sites-available && ls -A\" \\' >> /root/.config/shell/rootshortcutrc"

  # Sync Bash configuration
  rsync -vrazPlu --delete "$bash_path" "$THESIAH_SERVER:/root/.config/" >/dev/null 2>&1
  ssh "$THESIAH_SERVER" "chown -R root:root /var/www/thesiah"
  ssh "$THESIAH_SERVER" "chown -R root:root /root/.config/"
  ssh "$THESIAH_SERVER" "ln -sf /root/.config/bash/bash_profile /root/.profile"
  ssh "$THESIAH_SERVER" "source /root/.profile"

  # Sync for Git
  ssh "$THESIAH_SERVER" "cp -r /root/.config /var/www/git/"
  ssh "$THESIAH_SERVER" "chown -R git:git /var/www/git/.config/"
  ssh "$THESIAH_GIT" "ln -sf /var/www/git/.config/bash/bash_profile /var/www/git/.profile"
  ssh "$THESIAH_GIT" "source /var/www/git/.profile"
}

sync_nextcloud() {
  base="$(basename "$backup_path")"
  parent="$(dirname "$backup_path")"
  tmpdir="$(mktemp -d)"
  cd "$tmpdir" || return 1
  tar -C "$parent" -zcf "$base".tar.gz "$base" >/dev/null 2>&1
  rsync -vrazPlu --delete "$tmpdir/$base".tar.gz "$THESIAH_SERVER:/var/www/nextcloud/data/si@thesiah.xyz/files/backup/" >/dev/null 2>&1
  ssh "$THESIAH_SERVER" "chown -R www-data:www-data /var/www/nextcloud/data/si@thesiah.xyz/files/backup" >/dev/null 2>&1
  ssh "$THESIAH_SERVER" "cd /var/www/nextcloud && sudo -u www-data ./occ files:scan --path="/si@thesiah.xyz/files"" >/dev/null 2>&1
  rm -r "$tmpdir"
}

handle_long_option() {
  case $1 in
  help)
    usage
    ;;
  root)
    echo "Sync root files..."
    sync_root && echo "Success to sync root!" && echo "Done!" || error "Failed to back up root"
    exit 0
    ;;
  *)
    error "Unknown option: --$1"
    ;;
  esac
}

process_options() {
  while [ $# -gt 0 ]; do
    case $1 in
    -h | --help)
      usage
      ;;
    -r | --root)
      echo "Sync root files..."
      sync_root && echo "Success to sync root!" && echo "Done!" || error "Failed to back up root"
      exit 0
      ;;
    --*)
      handle_long_option "${1#--}"
      ;;
    -*)
      error "Unknown option: $1"
      ;;
    *)
      break
      ;;
    esac
    shift
  done
}

# Start script
echo "Backup starts to $backup_path..."
process_options "$@"

# Main script logic
# Check if backup drive is available
backup_available=false
if mount | grep -q " /mnt/second "; then
  backup_available=true
  echo "Backup drive is mounted"
else
  echo "Warning: /mnt/second is not mounted"
  echo "Attempting to mount backup drive..."
  if mount_luks 2>/dev/null && mountpoint -q /mnt/second 2>/dev/null; then
    backup_available=true
    echo "Success to mount luks drive!"
  else
    echo "Backup drive not available. Skipping file backup..."
  fi
fi

# Sync home files only if backup drive is available
if [ "$backup_available" = true ]; then
  [ -d "$backup_path" ] || sudo mkdir -p "$backup_path"
  echo "Sync home files..." && sync_files && echo "Success to sync files!" || echo "Warning: Failed to sync some files"
else
  echo "Skipping home files sync (no backup drive)"
fi

echo "Sync root files..." && sync_root && echo "Success to sync root!" || echo "Warning: Failed to sync root"

# Sync server files only if server is configured
if [ -n "$THESIAH_SERVER" ]; then
  echo "Sync server files..." && sync_server && echo "Success to sync server!" || echo "Warning: Failed to sync server"
else
  echo "Skipping server sync (THESIAH_SERVER not set)"
fi

# Sync to nextcloud only if backup drive is available and server is configured
if [ "$backup_available" = true ] && [ -n "$THESIAH_SERVER" ]; then
  echo "Sync files to nextcloud..." && sync_nextcloud && echo "Success to sync nextcloud!" || echo "Warning: Failed to sync nextcloud"
fi

echo "Done!"