/**
 * Serialized channel renames/moves to avoid Discord rate limits (e.g. 2 renames / 10 min per channel).
 */
const PQueue = require('p-queue').default;

const channelQueue = new PQueue({
  concurrency: 1,
  intervalCap: 2,
  interval: 10000
});

function enqueueRename(channel, newName) {
  return channelQueue.add(async () => {
    try {
      await channel.setName(newName);
    } catch (err) {
      const msg = err?.message || String(err);
      if (msg.includes('429') || msg.toLowerCase().includes('rate limit')) {
        console.warn(`enqueueRename: rate limit renaming channel "${channel.name}"`);
        return;
      }
      console.error('enqueueRename:', err);
      throw err;
    }
  });
}

function enqueueMove(channel, categoryId) {
  return channelQueue.add(() => channel.setParent(categoryId, { lockPermissions: true }));
}

module.exports = { channelQueue, enqueueRename, enqueueMove };