#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DRY_RUN=0

usage() {
  cat <<'USAGE'
Usage: ./clean-latex-junk.sh [--dry-run]

Removes common LaTeX build byproducts from this repository, recursively.
Source files and PDFs are not removed.

Options:
  --dry-run   Print files that would be removed without deleting them.
  -h, --help  Show this help.
USAGE
}

for arg in "$@"; do
  case "$arg" in
    --dry-run) DRY_RUN=1 ;;
    -h|--help) usage; exit 0 ;;
    *) echo "Unknown option: $arg" >&2; usage; exit 2 ;;
  esac
done

patterns=(
  "*.aux"
  "*.bcf"
  "*.blg"
  "*.fdb_latexmk"
  "*.fls"
  "*.lof"
  "*.log"
  "*.lot"
  "*.nav"
  "*.out"
  "*.run.xml"
  "*.snm"
  "*.synctex.gz"
  "*.toc"
  "*.vrb"
  "*.xdv"
)

files=()
while IFS= read -r -d '' file; do
  files+=("$file")
done < <(
  find "$ROOT" \
    \( -path "$ROOT/.git" -o -path "$ROOT/.cursor" \) -prune \
    -o -type f \
    \( \
      -name "${patterns[0]}" \
      -o -name "${patterns[1]}" \
      -o -name "${patterns[2]}" \
      -o -name "${patterns[3]}" \
      -o -name "${patterns[4]}" \
      -o -name "${patterns[5]}" \
      -o -name "${patterns[6]}" \
      -o -name "${patterns[7]}" \
      -o -name "${patterns[8]}" \
      -o -name "${patterns[9]}" \
      -o -name "${patterns[10]}" \
      -o -name "${patterns[11]}" \
      -o -name "${patterns[12]}" \
      -o -name "${patterns[13]}" \
      -o -name "${patterns[14]}" \
      -o -name "${patterns[15]}" \
    \) -print0
)

if ((${#files[@]} == 0)); then
  echo "No LaTeX build byproducts found."
  exit 0
fi

if ((DRY_RUN)); then
  echo "Would remove ${#files[@]} LaTeX build byproduct(s):"
  printf '  %s\n' "${files[@]#$ROOT/}"
  exit 0
fi

printf 'Removing %s LaTeX build byproduct(s):\n' "${#files[@]}"
printf '  %s\n' "${files[@]#$ROOT/}"
rm -f -- "${files[@]}"
echo "Done."