#!/bin/bash

#Company:       PowerCraft Technology
#Author:        Copyright Jelle de Jong <jelledejong@powercraft.nl>
#Note:          Please send me an email if you enhanced this script
#Version:       0.0.2
#Date:          05-07-2008
#System:        Ubuntu/Debian GNU/Linux
#Information:   man test, man bash
#Category       Thunar scripts
#Name:          DjVu Duplex
#Description:   Rearrange selected files from manual order to duplex order
#Command:       xfce4-terminal --disable-server --hide-toolbars --execute /usr/share/pct-thunar-scripts/scripts/djvu-file-reorder %F
#Patterns:      *.djvu; *.DJVU;
#Image Files:   True

# Did the script work for you?
# Yes
# Yes, but with some errors
# Yes, but I had to change some things
# Not at all

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

# todo:
# cecho() - use case ... esac there instead of that ugly if..elsif

TEXTDOMAINDIR=/usr/share/locale
TEXTDOMAIN=${0##*/}

NAME=$"DjVu Duplex"
DESCRIPTION=$"Rearrange selected files from manual order to duplex order"

cecho()
{
    case "$1" in
        "black")
               echo -ne "\E[30m"
               ;;
        "red")
               echo -ne "\E[31m"
               ;;
        "green")
               echo -ne "\E[32m"
               ;;
        "yellow")
               echo -ne "\E[33m"
               ;;
        "blue")
               echo -ne "\E[34m"
               ;;
        "magenta")
               echo -ne "\E[35m"
               ;;
        "cyan")
               echo -ne "\E[36m"
               ;;
         *)
               echo -ne "\E[30m"
               exit
               ;;
    esac

    echo "$2" "$3"
    tput sgr0
}

cecho "green" $"program:"
echo "$0"

cecho "green" $"description:"
echo "$DESCRIPTION"

reorder_files()
{
    declare -a array_files

    center=$(($file_count / 2))
    center=$(($center - 1))
    #~ echo $center

    let index=0
    let step=2
    for value in "${!file_query[@]}"
    do
        if (( "$value" == 0 ))
        then
            array_files["$index"]="${file_query[$value]}"
        elif (( "$value" <= "$center" ))
        then
            index=$(($index + $step))
            array_files["$index"]="${file_query[$value]}"
        elif (( "$value" == (($center + 1)) ))
        then
            index=$(($index + 1))
            array_files["$index"]="${file_query[$value]}"
        elif (( "$value" > $(($center + 1)) ))
        then
            index=$(($index - $step))
            array_files["$index"]="${file_query[$value]}"
        fi
    done

    #debug:
    #~ echo ${!array_files[*]}
    #~ echo ${array_files[*]}

    cecho "red" $"resume count number: $resume_count"
    for value in "${array_files[@]}"
    do
        echo "$value"
        dirname=${value%/*}
        filename=${value##*/};
        #debug:
        #~ echo "$count-$filename"
        cecho "green" "-- -- -- -- --"
        cp --verbose "$value" "$dirname/$resume_count-$filename"
        ((resume_count++))
    done
    echo ""
}

resume_count=41
cecho "red" $"resume with increase number: $resume_count"
echo ""

for I in "$@"
do
    cecho "green" $"starting: "

    if [ -f "$I" ]
    then
        extension=${I##*.}
        extension=$(echo $extension | tr '[:upper:]' '[:lower:]')
        [[ "$extension" = djvu ]] && file_query+=("$I") && ((file_count++))
        echo $"filling: file query $file_count:" ${I##*/}
    fi

    cecho "green" $"completed:"
    cecho "blue" "---------------"
done

if [ -n "$file_query" ]
then
    reorder_files "${file_query[@]}"
fi

echo $"done, closing after 25 seconds"
sleep 25

exit

# debug information:
#~ 01 = 01 (+0)
#~ 02 = 03 (+2)
#~ 03 = 05 (+2)
#~ 04 = 07 (+2)
#~ 05 = 09 (+2)
#~ 06 = 11 (+2)
#~ 07 = 13 (+2)
#~ 08 = 15 (+2)
#~ 09 = 17 (+2)
#~ 10 = 19 (+2)
#~ 11 = 21 (+2)
#~ 12 = 23 (+2)
#~ 13 = 25 (+2)
#~ 14 = 27 (+2)
#~ 15 = 29 (+2)
#~ 16 = 31 (+2)
#~ 17 = 33 (+2)
#~ 18 = 35 (+2)
#~ 19 = 37 (+2)
#~ -------
#~ 20 = 38 (+1)
#~ 21 = 35 (-2)
#~ 22 = 33 (-2)
#~ 23 = 31 (-2)
#~ ...