/**
 * Patch: capture addTimelineItem return value for DM serializeStatus.
 *
 * When sending an outbound DM via the Mastodon API, addTimelineItem returns
 * the stored MongoDB document (which has _id). The return value was ignored,
 * so the original timelineItem object had no _id. serializeStatus then crashed
 * on item._id.toString() → "Cannot read properties of undefined (reading 'toString')".
 *
 * Fix: capture the addTimelineItem result and pass it to serializeStatus.
 */

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

const candidates = [
  "node_modules/@rmdes/indiekit-endpoint-activitypub/lib/mastodon/routes/statuses.js",
  "node_modules/@indiekit/indiekit/node_modules/@rmdes/indiekit-endpoint-activitypub/lib/mastodon/routes/statuses.js",
];

const MARKER = "// [patch] dm-send-serialize-id";

const OLD = `      try {
        await addTimelineItem(collections, timelineItem);
      } catch (storeError) {
        console.warn("[Mastodon API] Failed to store outbound DM in timeline:", storeError.message);
      }

      // Return a full serialized status so clients (Phanpy, Elk) can render it
      const status = serializeStatus(timelineItem, {`;

const NEW = `      let storedDmItem = timelineItem; // [patch] dm-send-serialize-id
      try {
        const _dmResult = await addTimelineItem(collections, timelineItem);
        if (_dmResult?._id) storedDmItem = _dmResult;
      } catch (storeError) {
        console.warn("[Mastodon API] Failed to store outbound DM in timeline:", storeError.message);
      }

      // Return a full serialized status so clients (Phanpy, Elk) can render it
      const status = serializeStatus(storedDmItem, {`;

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

let patched = false;
for (const filePath of candidates) {
  if (!(await exists(filePath))) continue;
  const src = await readFile(filePath, "utf8");
  if (src.includes(MARKER)) {
    console.log(`[postinstall] patch-ap-dm-send-serialize-id: already applied in ${filePath}`);
    patched = true;
    break;
  }
  if (!src.includes(OLD)) {
    console.log(`[postinstall] patch-ap-dm-send-serialize-id: target snippet not found in ${filePath}`);
    continue;
  }
  await writeFile(filePath, src.replace(OLD, NEW), "utf8");
  console.log(`[postinstall] patch-ap-dm-send-serialize-id: applied to ${filePath}`);
  patched = true;
  break;
}

if (!patched) {
  console.log("[postinstall] patch-ap-dm-send-serialize-id: no target file found");
}