#!/bin/bash

OUTFILE=$(mktemp --suffix=.tex)

BASE_DATE=$(date --date=now +%Y-%m)
RED_LETTER_DAY=$(date --date=now +%F)
ORIGWAL=$(cat ~/.cache/wal/wal)
CAL_COLOR=$(xrdb -query | grep *.color66 | awk -F# '{print $2}')


# -----------------------------------------------------------
# 'Here document containing the body of the generated script.
(
cat <<EOF

\documentclass[convert={density=300,size=300x300,outext=.png}]{standalone}
\usepackage{tikz}
\usetikzlibrary{calendar}
\begin{document}
\color[HTML]{$CAL_COLOR}
\begin{tikzpicture}
\calendar (mycal) [dates=$BASE_DATE-01 to $BASE_DATE-last,week list];
\draw[red] (mycal-$RED_LETTER_DAY) circle (4pt);
\end{tikzpicture}
\end{document}

EOF
) > $OUTFILE
# -----------------------------------------------------------

pdf2png () {
cd /tmp
pdflatex -shell-escape $OUTFILE
PNGOUT=$(echo $OUTFILE | sed 's/tex/png/g')

convert $ORIGWAL $PNGOUT -gravity SouthEast -composite -format png -quality 90 output.png

DEL_TMPS=$(echo $OUTFILE | sed 's/tex/\*/g')
rm $DEL_TMPS
}

pdf2png

exit 0