#!/bin/bash

filename=""

if [[ ! -f ~/.trash.log ]]
then
  echo "No files in trash"
  exit
fi

if [[ $# -ne 1 ]]
then
  echo "Expected one param: name of file to restore"
  echo "Name of file to restore: "
  read filename
else
  filename=$1
fi

while [[ "$filename" == *\0* || "$filename" == *\/* ]]
do
  echo "Wrong filename"
  echo "Name of file to restore: "
  read filename
done

linkname=""
file_untrash=""

exec 3<&0

line_counter=0
while read line
do
  line_counter=$((line_counter+1))
  current_linkname=$(echo $line | awk '{print $NF}')
  current_filename=${line% $current_linkname}

  if [[ $current_filename == */$filename ]]
  then
    echo "Do you want to restore this file: " $current_filename "? Print Y/N or another to exit"
    read answer <&3
    case $answer in
    "Y")
      file_untrash=$current_filename
      linkname=$current_linkname
      break
      ;;
    "N") continue ;;
    *) exit ;;
    esac
  fi
done < ~/.trash.log

if [[ $file_untrash == "" || ! -f ~/.trash/$linkname ]]
then
  echo "No files to restore found"
  exit
fi

file_dir=${file_untrash%$filename}
if [[ ! -d "$file_dir" ]]
then
  echo "Original directory does not exist. Trying to restore in HOME directory"
  file_dir=$HOME
fi

while [[ -f $file_dir/$filename ]]
do
  echo "File with such a name already exists. Print another one for restoring file: "
  read filename
done

ln ~/.trash/"$linkname" "$file_dir"/"$filename"
echo "File" $filename "restored"

rm ~/.trash/"$linkname"
sed -i "${line_counter}d" ~/.trash.log