#!/bin/sh
#===================================================================================
#
#         FILE: HTS-Programming-01.sh
#
#        USAGE: HTS-Programming-01 scrambling_file
#
#  DESCRIPTION: This script is for level 1 challenge of HackThisSite
#               programming missions.
#  _____  _              _         _____  _                     _____     _____
# |   __||_| _____  ___ | | ___   |  _  || | ___  ___    ___   |   __|   |  _  |
# |__   || ||     || . || || -_|  |   __|| || .'||   |  |___|  |__   | _ |   __|_
# |_____||_||_|_|_||  _||_||___|  |__|   |_||__,||_|_|         |_____||_||__|  |_|
#                  |_|
#
#===================================================================================

# variable for final result
unscrambling_word_list=""

# check file exists or not
if [ -f $1 ] ; then

    # fetch scrambling words from file
    scrambling_words=$(cat $1)

    # use grep and regular expression to find unscrambling words
    for word in $scrambling_words ; do
        regexp="^[$word]\+\{${#word}\}" #regexp

        testing="$(grep -e "$regexp" wordlist.txt | wc -l)"
        if [ "$testing" == 1 ] ; then   # there's only one match, get it!
            unscrambling_word_list="$unscrambling_word_list, $(grep -e "$regexp" wordlist.txt | tr -d '\r\n ')"
        else                # multiple matches, need further checking
        word_sorted="$(echo $word | grep -o . | sort -n | tr -d '\r\n ')"
        # string comparison
            for match in `grep -e "$regexp" wordlist.txt`
            do
        match_sorted="$(echo $match | grep -o . | sort -n | tr -d '\r\n ')"
            if [ $word_sorted == $match_sorted ] ; then
            unscrambling_word_list="$unscrambling_word_list, $(echo $match | tr -d '\r\n ')"
        fi
        done
        fi
    done
    # display final result
    echo $unscrambling_word_list
fi

# bye bye
exit 0