/**
 * Patch: fix inbound reply/like/boost handling — publicationUrl missing in inbox handlers.
 *
 * Root cause:
 *   setupFederation() passes `publicationUrl` to its own scope but does NOT
 *   pass it to registerInboxListeners(). All inbox handlers (handleCreate,
 *   handleLike, handleAnnounce) read `collections._publicationUrl` to gate
 *   notifications and timeline storage, but that property is never set on the
 *   collections object.
 *
 *   Consequence:
 *     - handleCreate: `if (pubUrl && inReplyTo.startsWith(pubUrl))` is always
 *       false → reply notifications are never created.
 *     - handleAnnounce: boost notifications for our content never created.
 *     - handleCreate: replies to our posts from non-followed accounts are never
 *       stored in ap_timeline → invisible in Mastodon client conversation views.
 *
 * Fix A (federation-setup.js):
 *   Set `collections._publicationUrl = publicationUrl` immediately before
 *   registerInboxListeners() so the value flows through to all handlers.
 *
 * Fix B (inbox-handlers.js):
 *   In handleCreate, add an else-if branch that stores replies to our own posts
 *   in ap_timeline even when the replier is not in ap_following. This runs only
 *   when pubUrl is correctly set (Fix A).
 */

import { access, readFile, writeFile } from "node:fs/promises";

const MARKER = "// [patch] ap-inbox-publication-url";

// ── Fix A: federation-setup.js ────────────────────────────────────────────────

const federationCandidates = [
  "node_modules/@rmdes/indiekit-endpoint-activitypub/lib/federation-setup.js",
  "node_modules/@indiekit/indiekit/node_modules/@rmdes/indiekit-endpoint-activitypub/lib/federation-setup.js",
];

const OLD_REGISTER = `  registerInboxListeners(inboxChain, {
    collections,
    handle,
    storeRawActivities,
  });`;

const NEW_REGISTER = `  // Expose publicationUrl on collections so inbox handlers can gate ${MARKER}
  // notifications/timeline-storage to our own content only.
  collections._publicationUrl = publicationUrl;
  registerInboxListeners(inboxChain, {
    collections,
    handle,
    storeRawActivities,
  });`;

// ── Fix B: inbox-handlers.js ──────────────────────────────────────────────────

const handlersCandidates = [
  "node_modules/@rmdes/indiekit-endpoint-activitypub/lib/inbox-handlers.js",
  "node_modules/@indiekit/indiekit/node_modules/@rmdes/indiekit-endpoint-activitypub/lib/inbox-handlers.js",
];

const OLD_FOLLOWED_TAGS = `  } else if (collections.ap_followed_tags) {
    // Not a followed account — check if the post's hashtags match any followed tags`;

const NEW_FOLLOWED_TAGS = `  } else if (pubUrl && inReplyTo && inReplyTo.startsWith(pubUrl)) {
    // Reply to our post from a non-followed account — store in timeline ${MARKER}
    // so it appears in the Mastodon client API's conversation/notification view.
    try {
      const timelineItem = await extractObjectData(object, {
        actorFallback: actorObj,
        documentLoader: authLoader,
      });
      timelineItem.visibility = computeVisibility(object);
      await addTimelineItem(collections, timelineItem);
    } catch (error) {
      console.error("[inbox-handlers] Failed to store reply timeline item:", error.message);
    }
  } else if (collections.ap_followed_tags) {
    // Not a followed account — check if the post's hashtags match any followed tags`;

async function exists(p) {
  try { await access(p); return true; } catch { return false; }
}

async function patch(candidates, oldSnippet, newSnippet, label) {
  let checked = 0; let patched = 0;
  for (const filePath of candidates) {
    if (!(await exists(filePath))) continue;
    checked++;
    const source = await readFile(filePath, "utf8");
    if (source.includes(MARKER)) {
      console.log(`[postinstall] patch-ap-inbox-publication-url: ${label} already applied to ${filePath}`);
      continue;
    }
    if (!source.includes(oldSnippet)) {
      console.warn(`[postinstall] patch-ap-inbox-publication-url: ${label} snippet not found in ${filePath}`);
      continue;
    }
    await writeFile(filePath, source.replace(oldSnippet, newSnippet), "utf8");
    patched++;
    console.log(`[postinstall] Applied patch-ap-inbox-publication-url (${label}) to ${filePath}`);
  }
  return { checked, patched };
}

const a = await patch(federationCandidates, OLD_REGISTER, NEW_REGISTER, "set _publicationUrl");
const b = await patch(handlersCandidates, OLD_FOLLOWED_TAGS, NEW_FOLLOWED_TAGS, "store reply from non-follower");

const total = a.patched + b.patched;
if (a.checked + b.checked === 0) {
  console.log("[postinstall] patch-ap-inbox-publication-url: no target files found");
} else if (total === 0) {
  console.log("[postinstall] patch-ap-inbox-publication-url: already up to date");
} else {
  console.log(`[postinstall] patch-ap-inbox-publication-url: patched ${total} file(s)`);
}