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

root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
version="${1:?usage: publish-release.sh VERSION RELEASE_DIRECTORY}"
release_dir="${2:?usage: publish-release.sh VERSION RELEASE_DIRECTORY}"
api="${RENDEZVOUS_GITEA_API:-https://git.finalfactory.de/api/v1}"
registry="${RENDEZVOUS_CONTAINER_REGISTRY:-git.finalfactory.de}"
image="$registry/heikyu/rendezvous:$version"
token="${RENDEZVOUS_RELEASE_TOKEN:?RENDEZVOUS_RELEASE_TOKEN is required}"
username="${RENDEZVOUS_RELEASE_USERNAME:?RENDEZVOUS_RELEASE_USERNAME is required}"
release_builder="${RENDEZVOUS_RELEASE_BUILDER:?RENDEZVOUS_RELEASE_BUILDER is required}"
docker_config="$(mktemp -d)"
curl_config="$(mktemp)"
release_request=""
release_response=""
cleanup() {
  [[ -z "$release_request" ]] || rm -f "$release_request"
  [[ -z "$release_response" ]] || rm -f "$release_response"
  rm -f "$curl_config"
  rm -rf "$docker_config"
}
trap cleanup EXIT
chmod 0700 "$docker_config"
chmod 0600 "$curl_config"
printf 'header = "Authorization: token %s"\n' "$token" >"$curl_config"
export DOCKER_CONFIG="$docker_config"

for command in cosign curl docker dotnet jq; do
  command -v "$command" >/dev/null || {
    echo "Required publication command is unavailable: $command" >&2
    exit 1
  }
done

run_release_builder() {
  docker run --rm \
    --user "$(id -u):$(id -g)" \
    --volume "$root:/source:ro" \
    --volume "$release_dir:$release_dir" \
    --workdir /source \
    "$release_builder" "$@"
}

"$root/scripts/check-release-tag.sh" "v$version"
"$root/scripts/verify-release.sh" "$version" "$release_dir" publish-ready

require_absent() {
  local description="$1"
  local url="$2"
  local status
  status="$(curl --silent --show-error --output /dev/null --write-out '%{http_code}' \
    --config "$curl_config" "$url")"
  if [[ "$status" != 404 ]]; then
    echo "$description must not exist before publication (HTTP $status)." >&2
    exit 1
  fi
}

# Gitea package versions are immutable. Require all destinations to be empty
# before the first write so a tag can never become a silent partial rerun.
require_absent "Client package $version" \
  "$api/packages/HeiKyu/nuget/FinalFactory.Rendezvous.Client/$version"
require_absent "Contracts package $version" \
  "$api/packages/HeiKyu/nuget/FinalFactory.Rendezvous.Contracts/$version"
require_absent "Container $version" \
  "$api/packages/HeiKyu/container/rendezvous/$version"
require_absent "Release v$version" \
  "$api/repos/HeiKyu/Rendezvous/releases/tags/v$version"

feed="https://git.finalfactory.de/api/packages/HeiKyu/nuget/index.json"
for package in \
  "$release_dir/FinalFactory.Rendezvous.Contracts.$version.nupkg" \
  "$release_dir/FinalFactory.Rendezvous.Client.$version.nupkg"; do
  dotnet nuget push "$package" \
    --source "$feed" \
    --api-key "$token" \
    --timeout 300
done

printf '%s' "$token" | docker login "$registry" --username "$username" --password-stdin
expected_image_id="$(jq -er '.containerImageId' "$release_dir/release-provenance.json")"
current_image_id="$(docker image inspect --format '{{.Id}}' "$image")"
if [[ "$current_image_id" != "$expected_image_id" ]]; then
  echo "Local release tag changed after staging ($expected_image_id -> $current_image_id)." >&2
  exit 1
fi
docker push "$image"
digest_ref="$(docker inspect --format '{{index .RepoDigests 0}}' "$image")"
if [[ ! "$digest_ref" =~ ^git\.finalfactory\.de/heikyu/rendezvous@sha256:[0-9a-f]{64}$ ]]; then
  echo "Registry did not return an immutable Rendezvous image digest: $digest_ref" >&2
  exit 1
fi
run_release_builder python3 eng/release_artifacts.py record-container-digest \
  --release-dir "$release_dir" \
  --digest "$digest_ref"
cosign public-key --key env://COSIGN_PRIVATE_KEY >"$release_dir/cosign.pub"
run_release_builder ./scripts/finalize-signing-ready-release.sh \
  "$version" "$release_dir"

cosign sign --yes --key env://COSIGN_PRIVATE_KEY "$digest_ref"
cosign attest --yes \
  --key env://COSIGN_PRIVATE_KEY \
  --type https://finalfactory.de/rendezvous/release-provenance/v1 \
  --predicate "$release_dir/release-provenance.json" \
  "$digest_ref"
cosign sign-blob --yes \
  --key env://COSIGN_PRIVATE_KEY \
  --bundle "$release_dir/checksums.sha256.bundle" \
  "$release_dir/checksums.sha256"
"$root/scripts/verify-release.sh" "$version" "$release_dir" published
cosign verify --key "$release_dir/cosign.pub" "$digest_ref" >/dev/null
cosign verify-attestation \
  --key "$release_dir/cosign.pub" \
  --type https://finalfactory.de/rendezvous/release-provenance/v1 \
  "$digest_ref" >/dev/null
cosign verify-blob \
  --key "$release_dir/cosign.pub" \
  --bundle "$release_dir/checksums.sha256.bundle" \
  "$release_dir/checksums.sha256" >/dev/null

release_request="$(mktemp)"
release_response="$(mktemp)"
prerelease=false
if [[ "$version" == *-* ]]; then
  prerelease=true
fi
jq -n \
  --arg tag "v$version" \
  --arg commit "${GITHUB_SHA:?GITHUB_SHA is required}" \
  --arg digest "$digest_ref" \
  --argjson prerelease "$prerelease" \
  --rawfile changelog "$release_dir/CHANGELOG.md" \
  '{tag_name:$tag,target_commitish:$commit,name:("Rendezvous " + $tag),body:($changelog + "\n\n## Immutable container\n\n`" + $digest + "`\n"),draft:false,prerelease:$prerelease}' \
  >"$release_request"
curl --fail --silent --show-error \
  --request POST \
  --config "$curl_config" \
  --header 'Content-Type: application/json' \
  --data-binary "@$release_request" \
  "$api/repos/HeiKyu/Rendezvous/releases" >"$release_response"
release_id="$(jq -er '.id' "$release_response")"

for artifact in "$release_dir"/*; do
  curl --fail --silent --show-error \
    --request POST \
    --config "$curl_config" \
    --form "attachment=@$artifact" \
    "$api/repos/HeiKyu/Rendezvous/releases/$release_id/assets?name=$(basename "$artifact")" \
    >/dev/null
done

echo "Published immutable release v$version with container $digest_ref"