#!/usr/bin/env bash
set -e pipefail

MAP_FILE="/etc/jimlab/sshfs.map"
SSHFS_BIN="/usr/bin/sshfs"

# Default options & user; override via env if you like.
SSHFS_OPTS="${SSHFS_OPTS:-delay_connect,reconnect,follow_symlinks,transform_symlinks}"

is_sshfs_mount() {
  # true iff $1 is a real mountpoint and fstype looks like sshfs
  local d="$1"
  if ! mountpoint -q -- "$d"; then
    return 1
  fi
  local fstype
  fstype="$(findmnt -rn -o FSTYPE -T "$d" || true)"
  [[ "$fstype" == "fuse.sshfs" || "$fstype" == sshfs ]]
}

mount_one() {
  local remote="$1"   # e.g., shrek:/path or jim@shrek:/path
  local local_dir="$2"

  # Ensure local mountpoint exists
  mkdir -p -- "$local_dir"

  # Skip if something already mounted there
  if is_sshfs_mount "$local_dir"; then
    echo "Already mounted: $local_dir (skipping)"
    return 0
  fi

  echo "Mounting $remote -> $local_dir"
  # Don’t fail the whole script on a single mount error
  if ! "$SSHFS_BIN" -o "$SSHFS_OPTS" "$remote" "$local_dir"; then
    echo "WARN: Failed to mount $remote to $local_dir" >&2
    return 0
  fi
}

if [[ -f "$MAP_FILE" ]]; then
  # Read map file: "<host[:port]>:/remote-path  /local-path"
  while IFS= read -r line; do
    # Trim leading/trailing whitespace
    line="${line#"${line%%[![:space:]]*}"}"
    line="${line%"${line##*[![:space:]]}"}"
    # Skip blanks & comments
    [[ -z "$line" || "${line:0:1}" == "#" ]] && continue

    # Expect two fields: remote local
    # (Paths with spaces aren’t supported in this simple format)
    read -r remote local_dir <<<"$line"
    if [[ -z "${remote:-}" || -z "${local_dir:-}" ]]; then
      echo "WARN: Bad line in $MAP_FILE: $line" >&2
      continue
    fi

    mount_one "$remote" "$local_dir"
  done < "$MAP_FILE"
else
  echo "Map file $MAP_FILE does not exist."
fi