#!/usr/bin/env nuxr-nuxsh


type ffmpeg > /dev/null 2>&1 &&  FFMPEG_OR_LIBAV=ffmpeg
type avconv > /dev/null  2>&1 &&  FFMPEG_OR_LIBAV=avconv
type gm /dev/null 2>&1 && NUX_MAGICK=gm

QUALITY=${QUALITY:=90}

@namespace task. {

  function :video.change.container {
    CONTAINER=$1;
    shift;
          echo "Using $FFMPEG_OR_LIBAV for conversion."
    for video in "$@"; do
      echo "Starting processing Video: $video";
      $FFMPEG_OR_LIBAV -i "$video" -vcodec copy -acodec copy "${video}.$CONTAINER"
      echo "Processing done.";
    done
}

  function :nikon-mp4 {
    task.video.change.container mp4 "$@"
  }

  function :downscale TARGET SIZE {
    local i=0;
    local count="$#";
    mkdir -p $TARGET;
    for image in "$@"; do
      let "i=i+1"
      name=$(basename $image);
      target_file=$TARGET/$name;
      if [ -n "$PRESERVE" ]; then
        target_dir="${TARGET}/$(dirname "$image")";
        mkdir -p "$target_dir";
        target_file="${target_dir}/$name";
      fi
      echo "Image: $i/$count Downsampling  $image -> $target_file"
      $NUX_MAGICK convert $image \
        -filter Lanczos -sampling-factor 1x1 \
        -resize "${SIZE}x${SIZE}>" \
        -quality $QUALITY \
        $target_file
    done
  }


  ## to:: <jpg|png> <image...>
  ##
  ## Convert image to
  ##
  function :to target {
    if ! nux.check.function "media.to.$target" ; then
      echo Target type "$target" is not supported.
      return -1
    fi
    for file in "$@"; do
      target_dir=$(dirname "$file");
      target_file=$(basename "$file" | sed -re 's/\.[a-z0-9_]+$//g' -e "s/\$/.$target/g" );
      target_full="$target_dir/$target_file";
      media.to.$target "$file" "$target_full"
      echo $file $target_file
    done
  }

}

function media.to.jpg {
  $NUX_MAGICK convert "$1" -quality $QUALITY -auto-orient "$2"
}