#!/bin/bash

TYPE=$1
file=$2

ARIA2_RPC=/etc/transmission-daemon/aria2-rpc.sh

export LC_ALL=en_US.UTF-8

check_sub(){
    echo "check sub."
    SAVEIFS=$IFS # setup this case the space char in file name.
    IFS=$(echo -en "\n\b")
    for subdir in $(find -maxdepth 1 -type d |grep ./ |cut -c 3-); 
        do 
            echo $subdir
            cd "$subdir"
            convert_to_jpg
            cd ..
    done
    IFS=$SAVEIFS
}

convert_to_jpg(){
    
    for ext in jpg JPG bmp BMP png PNG; do
        echo "ext is $ext"
        if [ ! $(find . -maxdepth 1 -name \*.$ext | wc -l) = 0 ]; 
        then 
            x2jpg $ext
        fi
    done

    check_sub # check if has sub directory.
}

x2jpg(){
    if [ ! -d origin ];then
    mkdir origin
    fi
    if [ ! -d /tmp/jpg ]; then
        mkdir /tmp/jpg
        chmod -R 777 /tmp/jpg
    fi

    tmp_fifofile="/tmp/$$.fifo"
    mkfifo $tmp_fifofile      # create a fifo type file.
    exec 6<>$tmp_fifofile      # point fd6 to fifo file.
    rm $tmp_fifofile


    thread=10 # define numbers of threads.
    for ((i=0;i<$thread;i++));do 
    echo
    done >&6 # actually only put $thread RETURNs to fd6.

    for file in ./*.$1;do
    read -u6 
    {
        echo 'convert -quality 80' "$file" /tmp/jpg/"${file%.*}"'.jpg'
        convert -limit memory 64 -limit map 128 -quality 80 "$file" /tmp/jpg/"${file%.*}".jpg
        mv "$file" origin
        echo >&6
    } &
    done

    wait # wait for all child thread end.
    exec 6>&- # close fd6

    mv /tmp/jpg/* .
    pwd
    rm -r origin

    echo 'DONE!'
}

# wait for other x2t jobs done.

while [ -f /tmp/.x2t ]
do
    echo "wait other job exit"
    #sleep 2
    sleep $[ ( $RANDOM % 10 ) + 1 ]
done

touch /tmp/.x2t

tmpdir=$(mktemp -d)

if [ "$TYPE" = "-z" ]; then
    DIR="${file%%.zip*}"
    echo "unzip $file -d $tmpdir";
    unzip "$file" -d $tmpdir # unzip to a tmp directory.
elif [ "$TYPE" = "-r" ]; then
    DIR="${file%%.rar*}"
    echo "unrar x $file $tmpdir";
    mv "$file" tmp.rar
    unrar x tmp.rar $tmpdir # unrar to a tmp directory.
    mv tmp.rar "$file"
fi

if [ $(ls $tmpdir | wc -l) = 1 ]; then # check if has folders, and mv the unziped directory as same name with the zip file.
    DIR2=$(ls $tmpdir)
    mv "$tmpdir/$DIR2" "$DIR"
    rmdir $tmpdir
else
    mv $tmpdir "$DIR"
fi    

echo $DIR
if [ -d "$DIR" ]; then
    cd "$DIR"
    convert_to_jpg # convert process.
    cd ..
    echo "tar cvf $DIR.tar $DIR" 
    tar cvf "$DIR.tar" "$DIR" --force-local --mode=a+rwX # tar the directory.
    rm -r "$DIR"
    # send to home aria2
    $ARIA2_RPC "$DIR.tar"
else
    echo "$DIR not exist."
fi

sync
rm /tmp/.x2t