#!/bin/bash
# Takes precip record with blank days removed and adds blank days back
# assumes that first three are day, month, year followed by one record but
#
# To accomodate more lines edit the varaible $linelen
# linelen=4 # three date values and one data value
linelen=`head -1 <$1 | dm N`

# set up an array of defaut data values
let cntdefval=linelen-3
for index in $(seq $cntdefval)
do
    defaultval[index]=0.0
done

# get entire file in variable array
lineval=( `cat $1` )

# set up initial nextval array values
np=0
for singval in ${lineval[@]}
do
    let np=np+1
    if [ $np -le $linelen ]
    then
        nextval[np]=$singval
        # echo "nextval($np) = ${nextval[np]}"
    fi
done

# ouput first line
echo "${nextval[@]}"

nval=0
nline=0
for singval in ${lineval[@]}
do
  let nval=nval+1
  if [ $nval -gt $linelen ]
  then
    let nline=nline+1
    lastval[nline]=${nextval[nline]}
    nextval[nline]=$singval
    if [ $nline -eq $linelen ]
    then
        # echo "lastval(1-$linelen) = ${lastval[@]}"
        # echo "nextval(1-$linelen) = ${nextval[@]}"
        inloop=0
        while [ $inloop -eq 0 ]
        do
            chkval=( `nextday ${lastval[1]} ${lastval[2]} ${lastval[3]}` )
            # echo "chkval(0-2) = ${chkval[0]} ${chkval[1]} ${chkval[2]}"
            if [ ${chkval[0]} -eq ${nextval[1]} ]
            then
                if [ ${chkval[1]} -eq ${nextval[2]} ]
                then
                    if [ ${chkval[2]} -eq ${nextval[3]} ]
                    then
                        echo "${nextval[@]}"
                        inloop=1
                    else
                        echo "${chkval[0]} ${chkval[1]} ${chkval[2]} ${defaultval[@]}"
                    fi
                else
                    echo "${chkval[0]} ${chkval[1]} ${chkval[2]} ${defaultval[@]}"
                fi
            else
                echo "${chkval[0]} ${chkval[1]} ${chkval[2]} ${defaultval[@]}"
            fi
            lastval[1]=${chkval[0]}
            lastval[2]=${chkval[1]}
            lastval[3]=${chkval[2]}
        done
        nline=0
    fi
  fi
done