import { SembleCard, SembleCollection } from "./types";

/**
 * Extract the collection ID from an AT Protocol URI
 * Example: at://did:plc:xxx/network.cosmik.collection/3m5a3ww5m4g2o -> 3m5a3ww5m4g2o
 */
export function extractCollectionId(uri: string): string {
  const parts = uri.split("/");
  return parts[parts.length - 1];
}

/**
 * Extract username from identifier (handle or DID)
 * Example: renderg.host -> renderg.host
 */
export function extractUsername(identifier: string): string {
  // If it's a DID, we'd need to resolve it, but for now we'll use the identifier as-is
  return identifier;
}

/**
 * Generate a Semble card link
 * Format: https://semble.so/url?id={cardUrl}
 */
export function generateCardLink(card: SembleCard): string {
  const cardUrl = card.value.url || "";
  return cardUrl ? `https://semble.so/url?id=${encodeURIComponent(cardUrl)}` : "";
}

/**
 * Generate a Semble collection link
 * Format: https://semble.so/profile/{username}/collections/{collectionId}
 */
export function generateCollectionLink(collection: SembleCollection, username: string): string {
  const collectionId = extractCollectionId(collection.uri);
  return `https://semble.so/profile/${username}/collections/${collectionId}`;
}

/**
 * Get the title of a card
 */
export function getCardTitle(card: SembleCard): string {
  return card.value.content?.metadata?.title || card.value.url || "Untitled Card";
}

/**
 * Get the subtitle/description of a card
 */
export function getCardSubtitle(card: SembleCard): string {
  return card.value.content?.metadata?.description || card.value.url || "No description";
}

/**
 * Format date for display
 */
export function formatDate(dateString: string): string {
  const date = new Date(dateString);
  return date.toLocaleDateString(undefined, {
    year: "numeric",
    month: "short",
    day: "numeric",
  });
}