import type { CommunityRuleSection } from "../../app/components/type/CommunityRule/CommunityRule.types";
import { parsePublishedDocumentForCommunityRuleDisplay } from "./publishedDocumentToDisplaySections";

const IDENTITY_KEYS = [
  "communityAvatarUrl",
  "communityAvatarFileName",
  "communityContext",
  "communityLocation",
  "communitySaveEmail",
  "title",
] as const;

export type CopiedNameHit = {
  categoryName: string;
  entryTitle: string;
};

/** Copy cards and text; drop name, description, photo, and save-email. */
export function stripCopiedRuleDocument(
  document: unknown,
): Record<string, unknown> {
  if (!document || typeof document !== "object" || Array.isArray(document)) {
    return {};
  }
  const copy = structuredClone(document) as Record<string, unknown>;
  for (const key of IDENTITY_KEYS) {
    delete copy[key];
  }
  return copy;
}

function entryHaystack(entry: CommunityRuleSection["entries"][number]): string {
  const blockText = (entry.blocks ?? [])
    .map((block) => `${block.label} ${block.body}`)
    .join("\n");
  return `${entry.title}\n${entry.body}\n${blockText}`;
}

/** First line that still names the original community after a copy. */
export function findCopiedNameHit(
  document: unknown,
  originalName: string,
): CopiedNameHit | null {
  const name = originalName.trim();
  if (name.length < 2) return null;
  const needle = name.toLowerCase();
  const sections = parsePublishedDocumentForCommunityRuleDisplay(document);
  for (const section of sections) {
    for (const entry of section.entries) {
      if (entryHaystack(entry).toLowerCase().includes(needle)) {
        return {
          categoryName: section.categoryName,
          entryTitle: entry.title,
        };
      }
    }
  }
  return null;
}