#!/usr/bin/env bash

declare -a sources

target=$1; shift;

i=0
while [ "$#" -gt 0 ]; do
  sources[$i]="$1";
  shift;
  let i=i+1;
done

function move-and-link-to-folder {
  local s="$1"; shift;
  local target="$1"; shift;
  local name=$(basename "$s");
  local sdir=$(dirname "$s");
  local target_path=$(realpath -Ls --relative-to="$sdir" "$target/$name" )
  mv "$s" "$target"
  ln -sf "$target_path" "$s"
}

function move-and-link {
  local s="$1"; shift;
  local target="$1"; shift;
  local sdir=$(dirname "$s");
  local target_path=$(realpath -Ls --relative-to="$sdir" "$target" )
  mv "$s" "$target"
  ln -sf "$target_path" "$s"
}

if [ "$i" -gt 1 ]; then
  if [ -d "$target" ]; then
    for s in "${sources[@]}"; do
      move-and-link-to-folder "$s" "$target"
    done
  else
    echo "Target $target is not directory."
    exit 1
  fi
else
  s="${sources[0]}"
  if [ -d "$target" ]; then
    move-and-link-to-folder  "$s" "$target"
  else
    move-and-link "$s" "$target"
  fi
fi