#!/usr/bin/env sh
set -eu

script_dir=$(CDPATH= cd "$(dirname "$0")" && pwd)
repo_root=$(CDPATH= cd "$script_dir/.." && pwd)
tex_path="$repo_root/doc/generated/main.tex"

read_tex_command() {
  sed -n "s/^\\\\newcommand{\\\\$1}{\\([^}]*\\)}$/\\1/p" "$tex_path" | head -n 1
}

publisher=mpabi
area=inf
series=$(read_tex_command CardSeries)
number=$(read_tex_command CardNumber)
slug=$(read_tex_command CardSlug)
version=$(read_tex_command CardVersion)
uuid=$(read_tex_command DocumentUUID)

if [ -z "$publisher" ] || [ -z "$area" ] || [ -z "$series" ] || \
   [ -z "$number" ] || [ -z "$slug" ] || [ -z "$version" ] || [ -z "$uuid" ]; then
  echo "missing card metadata in $tex_path" >&2
  exit 1
fi

commit=${GITEA_SHA:-${GITHUB_SHA:-}}
if [ -z "$commit" ]; then
  git_root=$(git -C "$repo_root" rev-parse --show-toplevel 2>/dev/null || true)
  if [ "$git_root" = "$repo_root" ]; then
    commit=$(git -C "$repo_root" rev-parse HEAD)
  else
    commit=local
  fi
fi
short_commit=$(printf '%s' "$commit" | cut -c1-12)
meta="$repo_root/doc/build-meta.tex"
trap 'rm -f "$meta"' EXIT HUP INT TERM
printf '\\newcommand{\\BuildCommit}{%s}\n' "$short_commit" > "$meta"

out="$repo_root/doc/pdf"
mkdir -p "$out"
find "$out" -maxdepth 1 -type f -name '*.pdf' -delete
(
  cd "$repo_root/doc/generated"
  latexmk -pdf -interaction=nonstopmode -halt-on-error -outdir="$out" main.tex
)

target="$out/$publisher-$area-$series-$number-$slug-$version-$uuid.pdf"
mv "$out/main.pdf" "$target"
find "$out" -maxdepth 1 -type f \( -name '*.aux' -o -name '*.log' -o \
  -name '*.out' -o -name '*.fls' -o -name '*.fdb_latexmk' \) -delete
printf '%s\n' "$target"