\set ON_ERROR_STOP on

BEGIN;

DO $$
DECLARE
  orphan_count integer;
  mirrored_count integer;
BEGIN
  SELECT count(*) INTO orphan_count
  FROM "FileAsset" file
  WHERE file."bizType" LIKE 'CONTRACT%'
    AND NOT EXISTS (SELECT 1 FROM "Contract" contract WHERE contract.id = file."bizId");

  SELECT count(*) INTO mirrored_count
  FROM "FileAsset" orphan
  WHERE orphan."bizType" LIKE 'CONTRACT%'
    AND NOT EXISTS (SELECT 1 FROM "Contract" contract WHERE contract.id = orphan."bizId")
    AND EXISTS (
      SELECT 1
      FROM "FileAsset" current_file
      JOIN "Contract" current_contract ON current_contract.id = current_file."bizId"
      WHERE current_file."bizType" = orphan."bizType"
        AND current_file."fileName" = orphan."fileName"
        AND current_file.size = orphan.size
    );

  IF orphan_count <> 29 OR mirrored_count <> orphan_count THEN
    RAISE EXCEPTION 'Unexpected orphan contract files: orphan %, mirrored %',
      orphan_count, mirrored_count;
  END IF;
END $$;

DELETE FROM "FileAsset" file
WHERE file."bizType" LIKE 'CONTRACT%'
  AND NOT EXISTS (SELECT 1 FROM "Contract" contract WHERE contract.id = file."bizId");

COMMIT;