#!/bin/sh

if [ -d out_small_data ];then
    echo "out_small_data dir existed."
    read -n 1 -p "remove it?[y/N]" answer
    echo
    if [ "$answer" == "y" ];then
        rm -rf out_small_data
    else
        exit
    fi
fi

cp data out_small_data -r

cd out_small_data

FILE_SIZE=300k
QUALITY=50
SIZE=100

while [ "$(find ./ -regex '.*\(jpg\|JPG\|png\|jpeg\)' -size +$FILE_SIZE | sed "s/^\.\///")x" != "x" ]
do
    for f in $(find ./ -regex '.*\(jpg\|JPG\|png\|jpeg\)' -size +$FILE_SIZE | sed "s/^\.\///")
    do
        #echo "converting $f with $QUALITY% quality..."
        echo "converting $f with $SIZE% size..."
        mv $f "tmp$f"
        convert -quality ${QUALITY} "tmp$f" "tmp2$f"
        convert -resize $SIZE%x$SIZE% "tmp2$f" $f
        rm "tmp$f" "tmp2$f"
    done
    QUALITY=$(($QUALITY - 1))
    SIZE=$(($SIZE - 1))
done

for f in $(find ./ -regex '.*\(.png\|.PNG\)$' | sed "s/^\.\///")
do
echo "convert png file "$f" to jpg file"
mv $f "tmp$f"
convert "tmp$f" $(echo $f | sed 's/\..*$/.jpg/')
rm "tmp$f"
done

echo "done"