#!/usr/bin/env bash
set -euo pipefail
# Env: GITEA_BASE_URL, GITEA_TOKEN, OWNER, REPO
# Usage: DRY_RUN=1 bash scripts/tracker/labels_dedupe.sh
#        APPLY=1 bash scripts/tracker/labels_dedupe.sh

need () {
  for v in GITEA_BASE_URL GITEA_TOKEN OWNER REPO; do
    if [[ -z "${!v:-}" ]]; then echo "ERROR: Missing $v" >&2; exit 1; fi
  done
}

api () {
  curl -sS -H "Authorization: token ${GITEA_TOKEN}" -H "Content-Type: application/json"     "${GITEA_BASE_URL}/api/v1$1"
}

main () {
  need
  echo "== Finding duplicate labels by name =="
  DUPS="$(api "/repos/${OWNER}/${REPO}/labels?limit=500" | jq -c 'group_by(.name) | map(select(length>1))')"
  count="$(echo "$DUPS" | jq 'length')"
  if [[ "$count" -eq 0 ]]; then echo "No duplicates."; exit 0; fi
  echo "$DUPS" | jq -r '.[] | "name=\(.[0].name) keep=\(.[0].id) delete=\([.[1:][] .id] | join(","))"'
  if [[ "${APPLY:-}" != "1" ]]; then
    echo "DRY RUN. Set APPLY=1 to delete extras (keeps the first ID per name)."
    exit 0
  fi
  echo "$DUPS" | jq -r '.[] | .[1:][] .id' | while read -r id; do
    echo "Deleting label id=$id"
    curl -sS -X DELETE -H "Authorization: token ${GITEA_TOKEN}"       "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${REPO}/labels/${id}" >/dev/null
  done
  echo "Done."
}
main "$@"