import { Hono } from "hono";
import { res } from "../response.js";
import type { SeederRegistry } from "../SeederRegistry.js";

export function torrentsRouter(registry: SeederRegistry) {
  const app = new Hono();

  /** List all active torrents with their current stats */
  app.get("/", (c) => {
    return c.json(registry.listTorrents());
  });

  /** Add a torrent — accepts multipart/form-data with a 'torrent' file field */
  app.post("/", async (c) => {
    const body = await c.req.parseBody();
    const file = body.torrent;

    if (!file || typeof file === "string") {
      return res.badRequest(c, "Missing 'torrent' file field");
    }

    const buf = Buffer.from(await (file as File).arrayBuffer());

    try {
      const state = await registry.addTorrent(buf);
      return res.created(c, state);
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      return res.unprocessable(c, msg);
    }
  });

  /** Get stats + announce history for a specific torrent */
  app.get("/:hash", (c) => {
    const { hash } = c.req.param();
    const list = registry.listTorrents();
    const torrent = list.find((t) => t.infoHashHex === hash);

    if (!torrent) {
      return res.notFound(c);
    }

    return c.json({
      ...torrent,
      history: registry.getHistory(hash),
    });
  });

  /** Remove a torrent — sends 'stopped' to trackers then removes it */
  app.delete("/:hash", async (c) => {
    const { hash } = c.req.param();
    const removed = await registry.removeTorrent(hash);

    if (!removed) {
      return res.notFound(c);
    }

    return c.json({ ok: true });
  });

  return app;
}