#!/usr/bin/env bash
# Delete older Gitea releases (including their assets and git tags) for an
# image, keeping only the newest release per distro.
#
# Usage: RELEASE_TOKEN=<token-with-write:repository> ./prune-releases.sh [image]
#
# The token defaults to $RELEASE_TOKEN; GITEA_URL/GITEA_REPO match the workflow.
set -euo pipefail

IMAGE="${1:-fedora-cosmic}"
GITEA_URL="${GITEA_URL:-https://git.plabble.org}"
GITEA_REPO="${GITEA_REPO:-Misthios/bootc-images}"
TOKEN="${RELEASE_TOKEN:-${GITHUB_TOKEN:-}}"

[[ -n "${TOKEN}" ]] || { echo "RELEASE_TOKEN (write:repository) is required" >&2; exit 1; }
API="${GITEA_URL%/}/api/v1/repos/${GITEA_REPO}"

# Collect matching releases (API returns newest first).
all=""
page=1
while :; do
  page_json="$(curl -fsSL -H "Authorization: token ${TOKEN}" \
    "${API}/releases?limit=50&page=${page}")"
  [[ "$(jq 'length' <<< "${page_json}")" -eq 0 ]] && break
  all+="$(jq -r --arg p "${IMAGE}-" \
    '.[] | select(.tag_name | startswith($p)) | "\(.tag_name)\t\(.id)"' \
    <<< "${page_json}")"$'\n'
  page=$((page + 1))
  [[ "${page}" -gt 40 ]] && break
done

# Tag shape: "<image>-<distro>.<date>.<run>" -> prefix "<image>-<distro>".
# Keep the first (newest) release seen per prefix, delete the rest.
seen=""
while IFS=$'\t' read -r tag id; do
  [[ -z "${tag}" ]] && continue
  prefix="${tag%.*.*}"
  if grep -qxF "${prefix}" <<< "${seen}"; then
    echo "removing ${tag}"
    curl -fsSL -X DELETE -H "Authorization: token ${TOKEN}" \
      "${API}/releases/${id}" >/dev/null || true
    curl -fsSL -X DELETE -H "Authorization: token ${TOKEN}" \
      "${API}/tags/${tag}" >/dev/null || true
  else
    seen+="${prefix}"$'\n'
    echo "keeping  ${tag}"
  fi
done <<< "${all}"

echo "Pruned ${IMAGE} releases (kept newest per distro)."