#!/bin/bash
#Words Of Wisdom
# output some random text from my journal 

#TODO
# - add option to specify max depth of directory recursion (or no recursion)
# - define a more detailed config file

r=5 #range of text sample (how many lines to grab)
V=false #verbose

files=()

while getopts "f:l:r:v" opt; do
    case $opt in
        v)
         V=true
         ;;
        f)
         files+=("$OPTARG")
         if $V ; then echo $OPTARG; fi
         ;;
        r)
         r=$OPTARG
         echo "using range="$r
        ;;
        l)
         if $V ; then echo "using files listed in "$OPTARG; fi
         for l in `cat $OPTARG`; do
            l=`echo $l | sed 's,\~,/home/'$USER'/,g'`
            echo $l
            for f in `find $l`; do #expand any wildcards
                if $V ; then echo "adding "$f; fi
                files+=("$f")
            done
         done
        ;;
    esac
done

if [[ ${#files[@]} == 0 ]]; then
    files=(~/doc/j/_journal-toaug2022 ~/_poetry ~/doc/_journal_2019 )
fi

if [ $V ]; then echo "Grabbing text sample from files: "${files[*]}; fi

n=${#files[@]}
n=$(($n-1))
f=${files[`shuf -i 0-${n} -n 1`]}
if [[ ${f} == *".odt" ]]; then
    if $V ; then echo "odt file"; fi
    txt=`odt2txt ${f} | tr '.' '\n'`# | sed 's/\./\.\n/g'` #split by sentence because most of these are 1 line
    
    l=`echo ${txt} | wc -l | cut -f1 -d' '`
    echo $txt
    echo $l
    exit 0
else
    l=`wc -l ${f} | cut -f1 -d' '` 
    txt=`cat ${f}`
fi
if $V; then echo "l="$l; fi

if [[ -z $l ]]; then
    echo "line get failed. perhaps ${f} doesn't exist?"
    exit 1
fi

t=''
while [[ ! "$t" =~ ^[a-zA-Z0-9] || "$t" =~ ^[0-9] ]]; do 
        if $V ; then echo "sampling from "${f}; fi
        i=`shuf -i ${r}-${l} -n 1`
        s=$(($i-$r))
        e=$(($i+$r))
        if [[ ${e} -gt ${l} ]]; then
            e=$((l-1))
        fi
        if $V ; then echo "lines "$s"-"$e; fi
        t=`echo ${txt} | sed -n ${s},${e}p`
#        sleep 2
done
echo ${t}