import { FragmentToken } from "../tokens.js";
import type { SqlFragmentToken, UuidSqlToken } from "../types.js";
import { formatSlonikPlaceholder } from "../utilities/formatSlonikPlaceholder.js";
import { InvalidInputError } from "@slonik/errors";

export type UUID = `${string}-${string}-${string}-${string}-${string}`;

// eslint-disable-next-line func-style
function isValidUuid(uuid: string): uuid is UUID {
  const uuidRegex = /^[\da-f]{8}(?:-[\da-f]{4}){3}-[\da-f]{12}$/iu;

  return uuidRegex.test(uuid);
}

export const createUuidSqlFragment = (
  token: UuidSqlToken,
  greatestParameterPosition: number,
): SqlFragmentToken => {
  if (!isValidUuid(token.uuid)) {
    throw new InvalidInputError("UUID parameter value must be a valid UUID.");
  }

  return {
    sql: formatSlonikPlaceholder(greatestParameterPosition + 1) + "::uuid",
    type: FragmentToken,
    values: [token.uuid],
  };
};