#!/bin/bash


_helpexit() {
  printf "Usage: %s [-u] remote:[path]

  remote from rclone config. Note, all remotes end with :
  -u will unmount all FUSE.rclone paths if no path given!

" "$( basename $0 )"
  _current_mounts
  exit 1
}

_current_mounts() {
  echo Current mounts:
  cat /proc/mounts | grep fuse.rclone | awk '{ print $1 " " $2 }' | sed "s,$HOME,~," | xargs printf "%15s %s\n"
}


_menu() {
    _current_mounts
    _askpass
    choice=$( rclone --ask-password=false listremotes | \
            sort | \
            smenu -t 1 -a c:0/2 i:3 -n 25 -m "Select remote"  \
            -N -D n:1 i:1 )

    echo $choice
    if [[ -z "$choice" ]]; then
        _helpexit
    fi
    remote="$choice"
}

_askpass() {
    if [[ -n "$RCLONE_CONFIG_PASS" ]]; then
      # password already set
      return
    fi
    if grep -q ^"# Encrypted rclone configuration File" "$HOME/.config/rclone/rclone.conf"; then
        read -s -p "rclone config password: " RCLONE_CONFIG_PASS
        export RCLONE_CONFIG_PASS
    else
        RCLONE_CONFIG_PASS="not-required"
        true
    fi
}

_check_mount() {
    if [[ -d ~/mnt/"$valid_name" ]]; then
      device1=$( stat -c "%d" ~/mnt/"$valid_name" )
      device2=$( stat -c "%d" ~/mnt )
    else
      device1=valid
      device2=valid
    fi
}

[[ -z "$1" ]] && _menu
for (( i=1; i<=$#; i++ )); do
    [[ ${!i} = "-h" ]] && _helpexit
    [[ ${!i} = "--help" ]] && _helpexit
done
unmount=false
for (( i=1; i<=$#; i++ )); do
    [[ ${!i} = "-u" ]] && { unmount=true; continue; }
    if [[ -z "$remote" ]]; then
        remote="${!i}"
    fi
done

mkdir -p ~/mnt

valid_name=$( echo "${remote%:}" | sed -e 's/:/-/g' | sed -e 's/[^A-Za-z0-9._@-]//g' )

if [[ "$unmount" = true ]]; then
    cd ~/mnt
    if [[ -n "$remote" ]]; then
        echo Unmounting ~/mnt/$valid_name
        fusermount -u -z ~/mnt/$valid_name
        rmdir --ignore-fail-on-non-empty ~/mnt/$valid_name &>/dev/null
    else
        # no path, unmount all
        cat /proc/mounts | grep fuse.rclone | awk '{ print $2 }' | while read dir; do
            echo Unmounting $dir
            fusermount -u -z "$dir"
            rmdir --ignore-fail-on-non-empty "$dir" &>/dev/null
        done
    fi
    exit
fi

if [[ -z "$remote" ]]; then
    echo "No remote given"
    _helpexit
fi

_check_mount
tries=20

if [[ $device1 = $device2 ]]; then
    echo "Mounting $remote in ~/mnt/$valid_name"
    _askpass
    cd ~/mnt
    mkdir -p "$valid_name"

    echo ""
    rclone --ask-password=false  mount --daemon "${remote}" ~/mnt/"$valid_name"
    if [[ $? -gt 0 ]]; then
        tries=1
    fi
    echo "Waiting for mount to finish ..."
else
    echo "~/mnt/$valid_name is already mounted"
    exit
fi

while [[ $tries -gt 0 ]]; do
    read -t 1 -n 1 key
    _check_mount
    if [[ $device1 = $device2 ]]; then
        tries=$(( $tries - 1 ))
    else
        df -h "$valid_name"
        exit 0
    fi
done

echo $remote was not mounted
fusermount -u -z ~/mnt/$valid_name &>/dev/null
rmdir --ignore-fail-on-non-empty ~/mnt/$valid_name &>/dev/null
exit 1