#!/bin/bash

if [ "$1" == '-h' -o "$1" == '--help' ];
then
  echo "scriptname, results directory, 'width'x'height'";
  exit 0;
fi

if [ -f "$1" -o -z "$2" ];
then
  echo "There're not enough parameters";
  exit 0;
fi

source_dir=$(pwd);
results_dir="$1";
result_width=$( echo "$2" | cut -d 'x' -f 1 );
result_height=$( echo "$2" | cut -d 'x' -f 2 );

if [ -d "$results_dir" ]
then
  echo "Directory $results_dir already exists";
  exit 0;
else
 mkdir $results_dir;
fi


for pic in $source_dir/*.*[jJ][pP][gG]*;
do
  picname="${pic##*/}";
  echo "$picname";
  file_res=$( identify "$pic" | awk '{print $3}' );
  width=$( echo "$file_res" | cut -d 'x' -f 1 );
  height=$( echo "$file_res" | cut -d 'x' -f 2 );
  if [ "$width" -ge "$result_width" -o "$height" -ge "$result_height" ]
      then
        convert -resize "$result_width"'x'"$result_height" "$pic" "$results_dir"/"$picname";
fi

done