WITH normalized_tags AS (
  SELECT
    memo.id,
    memo.history_id,
    memo.user_id,
    regexp_replace(trim(memo.tag), '[[:space:]]+', ' ', 'g') AS clean_tag,
    lower(regexp_replace(trim(memo.tag), '[[:space:]]+', ' ', 'g')) AS clean_key,
    row_number() OVER (
      PARTITION BY memo.history_id,
        lower(regexp_replace(trim(memo.tag), '[[:space:]]+', ' ', 'g'))
      ORDER BY memo.created_at, memo.id
    ) AS duplicate_rank
  FROM public.memo_tags AS memo
), memo_impact AS (
  SELECT
    count(*)::bigint AS total,
    count(*) FILTER (WHERE clean_key = '' OR char_length(clean_tag) > 80)::bigint AS invalid,
    count(*) FILTER (WHERE duplicate_rank > 1)::bigint AS duplicates
  FROM normalized_tags
), owner_impact AS (
  SELECT count(*)::bigint AS mismatches
  FROM public.memo_tags AS memo
  JOIN public.history AS history_item ON history_item.id = memo.history_id
  WHERE memo.user_id <> history_item.user_id
)
SELECT
  (SELECT total FROM memo_impact) AS memo_tags_total,
  (SELECT invalid FROM memo_impact) AS memo_tags_invalid_to_delete,
  (SELECT duplicates FROM memo_impact) AS memo_tags_duplicates_to_delete,
  (SELECT mismatches FROM owner_impact) AS memo_tag_owner_repairs,
  (SELECT count(*)::bigint FROM public.meetings) AS meetings_total,
  (SELECT count(*)::bigint FROM public.processing_jobs) AS processing_jobs_total,
  (SELECT count(*)::bigint FROM public.profiles) AS profiles_total,
  (SELECT count(*)::bigint FROM public.subscriptions) AS subscriptions_total;