#!/bin/bash
# picwikipedia.sh 
# Michael.ZhanShi@Gmail.com
# http://www.econst.org

export LC_ALL=C

pwtmp1=$(basename $0)_1_$$
pwtmp2=$(basename $0)_2_$$
pwtmp3=$(basename $0)_3_$$

WEBFAILURE=66
OTHERFAILURE=67

mfyear=${1:-$(date +%Y)}
mfmonth=${2:-$(date +%m)}
mfmonth1=$(date -d "$mfmonth/01" +%B)
picdir=${3:-"${HOME}/Pictures"}

cd /tmp

if wget -nv -c "http://en.wikipedia.org/wiki/Wikipedia:Picture_of_the_day/$mfmonth1"_"$mfyear" -O $pwtmp1
then
    :
else
    echo "Couldn't connect to wikipedia" >&2
    exit $WEBFAILURE
fi

sed -n -f picwikipedia.sed $pwtmp1 >$pwtmp2
awk -F '   ' 'NF==3 {
    gsub(/ /,"_",$2)
    gsub(/[\.\(\),"'"'"']/,"",$2)
    file="'$mfyear'" "." "'$mfmonth'" "." sprintf("%02d",$1) "_" tolower($2) tolower(substr($3,match($3,/\.[^\.]*$/)))
    print $3 "   " file
}' $pwtmp2 >$pwtmp3

awk -f download.awk $pwtmp3

for mfdays in $(cal $mfmonth $mfyear)
do
    continue
done

if [ "$(wc -l $pwtmp3 | awk '{ print $1 }')" -ne "$mfdays" ]
then
    ((mfdays=mfdays-$(wc -l $pwtmp3)))
    echo "$mfdays missed:(" >&2
fi

mkdir -p $picdir/Wikipedia/$mfyear/
mv $mfyear.$mfmonth* $picdir/Wikipedia/$mfyear/

echo
echo "Done!"

exit 0