import { CREDITS_ARTICLE_IMAGE, formatCredits } from '../../lib/credit-costs';

/**
 * What publishing with images adds to the bill: one picture for every image
 * the article suggests that has none yet, since the ones already made are
 * reused rather than drawn again.
 *
 * @param {number} suggested - Images the article suggests.
 * @param {number} ready - Suggestions that already have a picture.
 * @returns {string} The sentence the publish dialog prints.
 */
export const blogImagesCost = (suggested: number, ready: number): string => {
  const missing = Math.max(0, suggested - ready);
  const each = formatCredits(CREDITS_ARTICLE_IMAGE);
  if (suggested === 0) return `Each image costs ${each}.`;
  if (missing === 0) {
    return suggested === 1
      ? 'Its image is already made, so this costs nothing more.'
      : `Its ${suggested} images are already made, so this costs nothing more.`;
  }
  const count = missing === 1 ? 'the 1 image' : `the ${missing} images`;

  return `It draws ${count} still missing at ${each} each, ${formatCredits(
    missing * CREDITS_ARTICLE_IMAGE
  )} in all.`;
};