#!/usr/bin/env bash

stamp () {
  local video=$(yt liveid)

  #local vids="$HOME/Videos/Recordings"
  local vids="${YOUTUBE_RECORDINGS}"

  local epoch=$(date +%s)
  local offset=$(( $epoch - $(stat --printf '%W' $(newest "${vids}"))))

  local hours=$(( $offset / 3600 ))
  local remainder=$(( $offset % 3600))
  local minutes=$(( $remainder / 60 ))
  local seconds=$(( $offset % 60))
  printf "%02d:%02d:%02d https://youtu.be/%s?t=%d %s\n" \
    $hours $minutes $seconds $video $offset $(date -d @$epoch -Iseconds)
}

parse_secs () {
  local x="$*"
  x=${x#*t=}
  x=${x% *}
  echo "$x"
}

parse_time () {
  local x="$*"
  x=${x##* }
  echo "$x"
}

usage () {
  echo 'usage:
  vidoffset          (print offset stamp)
  vidoffset ±<adj>   (print adjusted offset)'
}

if [[ -z $1 ]]; then
  stamp
  exit
fi

if [[ -z $2 ]]; then
  val=$(stamp)
  echo $val
  echo "would adjust prev stamp by $1"
  exit
fi

usage