day

#!/bin/zsh

# set TZ so that we get the correct day within the first 24 hours of the published puzzle
export TZ=America/New_York

# The URL uses un-padded day numbers, but we use 0-padded day numbers for the code and input file names.
# Thus, we build 2 day variables
dd=${1:-$(date '+%d')}
d=$dd
[[ "${d[1]}" -eq 0 ]] && d="${dd[2]}"
[[ ${#dd} -eq 1 ]] && dd="0$dd"

input="input/Day$dd.txt"
url="https://adventofcode.com/2024/day/$d/input"
dir="src/test/kotlin"
template="$dir/Template.kt"
code="$dir/Day$dd.kt"
session="session"

if [[ ! -s "$code" ]]; then
  sed -e "s/class Template/class Day$dd/" "$template" > "$code"
  git add "$code"
fi

# The input is not the same for all participants, and we thus must pass our session cookie when downloading. If you need
# to renew the cookie, log into the web site, then copy the session cookie value from the "Storage" tab of "Web
# Developer Tools" into the session file.
if [[ ! -s "$input" ]]; then
  if [[ ! -s "$session" ]]; then
    echo "Login to the Aoc website https://adventofcode.com/ and then save the 'session' cookie value in the '$session' file"
    exit 1
  fi

  if ! https --download --verify=no --output="$input" "$url" "Cookie:session=$(< $session)" >& /dev/null; then
    echo "Login to the Aoc website https://adventofcode.com/ and then update the '$session' file with the 'session' cookie value"
    exit 1
  fi
fi