#!/bin/bash
set -euo pipefail

number="$1"
name="$2"
pseudo="$3"
key="$4"

unset tmpdir
cleanup () {
  if [ -n "$tmpdir" ] && [ -d "$tmpdir" ]; then
    rm -fr "$tmpdir"
  fi
}
trap cleanup EXIT
tmpdir=$(mktemp -d)

text_to_image () {
  text="$1"
  fontsize="$2"
  maxwidth="$3"
  output="$4"
  convert -size $((${#text} * $fontsize))x$((2 * $fontsize)) xc:white -gravity center -font "Cantarell-Extra-Bold" -pointsize "$fontsize" -fill black -draw 'text 0,0 "'"$text"'"' "$output"
  convert "$output" -trim "$output"
  if [ "$(identify -format "%w" "$output")" -gt "$maxwidth" ]; then
    convert "$output" -resize "$maxwidth"x "$output"
  fi
}

text_to_qrcode () {
  text="$1"
  width="$2"
  output="$3"
  qrencode -t PNG -m 1 -s 9 "$text" -o "$output"
  convert "$output" -resize "$width"x "$output"
}

viewjpeg="$(ls /usr/share/ghostscript/*/lib/viewjpeg.ps | tail -1)"
convert_jpeg_to_pdf () {
  declare -a jpeg_stanza
  while [ $# -gt 1 ]; do
    jpeg_stanza+=( "($1) viewJPEG showpage" )
    shift
  done
  gs \
   -dNOSAFER \
   -sDEVICE=pdfwrite \
   -o "$1" \
   -g1051x678 \
    $viewjpeg \
   -c "${jpeg_stanza[*]}"
}

# 1. name -> image
text_to_image "$number" 42 470 "$tmpdir"/number.jpeg
text_to_image "$name" 42 470 "$tmpdir"/name.jpeg
text_to_image "$pseudo" 42 470 "$tmpdir"/pseudo.jpeg
text_to_image "$key" 36 950 "$tmpdir"/key.jpeg
text_to_qrcode "$key" 276 "$tmpdir"/qrcode.png

convert verso.jpeg \
  "$tmpdir"/number.jpeg -geometry +535+96 -composite \
  "$tmpdir"/name.jpeg -geometry +535+260 -composite \
  "$tmpdir"/pseudo.jpeg -geometry +535+413 -composite \
  "$tmpdir"/key.jpeg -geometry +47+577 -composite \
  "$tmpdir"/verso.jpeg

convert recto.jpeg \
  "$tmpdir"/qrcode.png -geometry +693+339 -composite \
  "$tmpdir"/recto.jpeg

[ -d badges ] || mkdir badges
convert_jpeg_to_pdf "$tmpdir"/recto.jpeg "$tmpdir"/verso.jpeg badges/"${number//\//_}".pdf