#!/usr/bin/env bash
# Builds the VPM release zip for dev.doloro.animator-as-crab and (re)generates vpm/index.json,
# the repository listing that VCC and ALCOM read.
#
# Needs `zip` and `jq`: run it inside `nix develop`.
#
# Environment overrides (all optional):
#   VPM_HOST          default https://git.scug.io
#   VPM_PROJECT       default doloro/av3-animation-as-crab
#   VPM_RELEASE_BASE  default <host>/<project>/releases/download/v<version>
#   VPM_INDEX         default <root>/vpm/index.json
#   VPM_INDEX_URL     default <host>/<project>/raw/branch/main/vpm/index.json
#   VPM_REPO_NAME     default "Doloro VPM Packages"
#   VPM_REPO_ID       default dev.doloro.vpm
set -euo pipefail

root=$(cd "$(dirname "$0")/.." && pwd)
pkg="$root/csharp/dev.doloro.animator-as-crab"
vpm="$root/vpm"

host=${VPM_HOST:-https://git.scug.io}
project=${VPM_PROJECT:-doloro/av3-animation-as-crab}
repo_name=${VPM_REPO_NAME:-Doloro VPM Packages}
repo_id=${VPM_REPO_ID:-dev.doloro.vpm}
index_url=${VPM_INDEX_URL:-$host/$project/raw/branch/main/vpm/index.json}
release_base=${VPM_RELEASE_BASE:-}

id=$(jq -r .name "$pkg/package.json")
version=$(jq -r .version "$pkg/package.json")
zip_name="$id-$version.zip"
: "${release_base:=$host/$project/releases/download/v$version}"
zip_url="$release_base/$zip_name"

stage=$(mktemp -d)
trap 'rm -rf "$stage"' EXIT
cp -r "$pkg/." "$stage/"
rm -f "$stage/.gitignore"

# The native library is not optional: DllImport("libaac") fails without it, and a VPM package is
# unpacked into Packages/, so it cannot rely on the user's Assets/Plugins. Ship it in the package.
# Only Linux is built here; drop a libaac.dll / libaac.dylib into vpm/native/ for other hosts.
shopt -s nullglob
native=("$vpm"/native/* "$root"/result/lib/*)
shopt -u nullglob
if [ ${#native[@]} -eq 0 ]; then
  echo "warning: no native library found; the package will not load libaac" >&2
fi
for lib in "${native[@]}"; do
  cp "$lib" "$stage/V1/Editor/"
  echo "bundled $(basename "$lib")"
done

mkdir -p "$vpm/dist"
rm -f "$vpm/dist/$zip_name"
(cd "$stage" && zip -r -X -q "$vpm/dist/$zip_name" .)
sha=$(sha256sum "$vpm/dist/$zip_name" | cut -d' ' -f1)

entry=$(jq -n \
  --arg id "$id" --arg version "$version" --arg zip_url "$zip_url" --arg sha "$sha" \
  --slurpfile manifest "$pkg/package.json" \
  '{name: $id, displayName: $manifest[0].displayName, version: $version, unity: $manifest[0].unity,
    description: $manifest[0].description, url: $zip_url, zipSHA256: $sha,
    dependencies: ($manifest[0].dependencies // {}), vpmDependencies: {}, author: $manifest[0].author}')

index=${VPM_INDEX:-$vpm/index.json}

old='{}'
[ -f "$index" ] && old=$(cat "$index")
echo "$old" | jq \
  --arg repo_name "$repo_name" --arg repo_id "$repo_id" --arg index_url "$index_url" \
  --arg id "$id" --arg version "$version" --argjson entry "$entry" \
  '.name = $repo_name | .id = $repo_id | .url = $index_url | .author = $entry.author
   | .packages = (.packages // {})
   | .packages[$id] = (.packages[$id] // {versions: {}})
   | .packages[$id].versions[$version] = $entry' > "$index"

jq -e . "$index" > /dev/null

echo "wrote $vpm/dist/$zip_name"
echo "sha256 $sha"
echo "updated $index -> $zip_url"