import { Metadata } from "next";

type Embed = {
  /**
   * The title of the embed.
   */
  title: string;

  /**
   * The title of the embed.
   */
  embedTitle?: string;

  /**
   * The description of the embed.
   */
  description: string;

  /**
   * The image to show as the thumbmail.
   */
  image?: string;

  /**
   * The type of the card.
   */
  cardType?: "summary" | "summary_large_image";
};

/**
 * Generates metadata for a embed.
 *
 * @param title the title of the embed
 * @param embedTitle the title of the embed
 * @param description the description of the embed
 * @param image the image to show as the thumbmail
 * @param cardType the type of the card
 * @returns the metadata for the embed
 */
export function generateEmbed({ title, embedTitle, description, image, cardType }: Embed): Metadata {
  // Fall back to the title
  if (!embedTitle) {
    embedTitle = title;
  }
  if (!cardType) {
    cardType = "summary";
  }

  const metadata: Metadata = {
    title: `${title}`,
    openGraph: {
      title: `${title}`,
      description: description,
    },
    twitter: {
      card: cardType,
    },
  };

  if (image) {
    metadata.openGraph!.images = [
      {
        url: image || "",
      },
    ];
  }

  return metadata;
}