#!/bin/bash

add_trackers() {
  torrent_hash=$1
  torrent_name=$2
  id=$2
  for base_url in "$TORRENTLIST"; do
    if [ ! -f /tmp/trackers.txt ]; then
      curl -o "/tmp/trackers.txt" "${base_url}"

      if [ -f /opt/trackers.txt ]; then
        cat /opt/trackers.txt >>/tmp/trackers.txt
      fi
    fi

    local=$(wc -c </tmp/trackers.txt)
    remote=$(curl -sI "${base_url}" | awk '/Content-Length/ {sub("\r",""); print $2}')

    if [ "$local" != "$remote" ]; then
      curl -o "/tmp/trackers.txt" "${base_url}"

      if [ -f /opt/trackers.txt ]; then
        cat /opt/trackers.txt >>/tmp/trackers.txt
      fi
    fi

    echo "URL for ${base_url}"
    echo "Adding trackers for $torrent_name ($torrent_hash)"

    for tracker in $(cat /tmp/trackers.txt); do
      echo -n "${tracker}..."
      if transmission-remote "$HOSTPORT" --authenv --torrent "${torrent_hash}" -td "${tracker}" | grep -q 'success'; then
        echo ' failed.'
      else
        echo ' done.'
      fi
    done
  done

  sleep 3m
  rm -f /tmp/TTAA.$id.lock
}

while true; do
  # Get list of active torrents
  ids="$(transmission-remote "$HOSTPORT" --authenv --list | grep -vE 'Seeding|Stopped|Finished|[[:space:]]100%[[:space:]]' | grep '^ ' | awk '{ print $1 }')"
  for id in $ids; do
    if [ ! -f /tmp/TTAA.$id.lock ]; then
      hash="$(transmission-remote "$HOSTPORT" --authenv --torrent "$id" --info | grep '^  Hash: ' | awk '{ print $2 }')"
      torrent_name="$(transmission-remote "$HOSTPORT" --authenv --torrent "$id" --info | grep '^  Name: ' | cut -c 9-)"
      add_trackers "$hash" "$torrent_name" "$id" &
      touch /tmp/TTAA.$id.lock
    fi
  done

  sleep ${INTERVAL:-25}
done