/**
 * Patch @rmdes/indiekit-endpoint-activitypub federation-setup.js:
 * - personOptions.alsoKnownAs → personOptions.aliases  (Fedify uses 'aliases')
 * - Add movedTo → personOptions.successor              (Fedify uses 'successor')
 */

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

const candidates = [
  "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 MARKER = "// patch-actor-aliases-successor: applied";

const OLD = `  if (profile.alsoKnownAs?.length > 0) {
    personOptions.alsoKnownAs = profile.alsoKnownAs.map((u) => new URL(u));
  }`;

const NEW = `  if (profile.alsoKnownAs?.length > 0) {
    personOptions.aliases = profile.alsoKnownAs.map((u) => new URL(u));
  }
  if (profile.movedTo) {
    personOptions.successor = new URL(profile.movedTo);
  }
  ${MARKER}`;

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-actor-aliases-successor: already applied in ${filePath}`);
    patched = true;
    break;
  }
  if (!src.includes(OLD)) {
    console.log(`[postinstall] patch-actor-aliases-successor: target not found in ${filePath}`);
    continue;
  }
  await writeFile(filePath, src.replace(OLD, NEW), "utf8");
  console.log(`[postinstall] patch-actor-aliases-successor: applied to ${filePath}`);
  patched = true;
  break;
}

if (!patched) {
  console.log("[postinstall] patch-actor-aliases-successor: no target file found");
}