import { readdir } from "node:fs/promises";
import { join } from "node:path";
import { SeederRegistry } from "@api/SeederRegistry";
import { startServer } from "@api/server";
import { loadConfig } from "@config/Config";

const config = loadConfig();
const registry = new SeederRegistry(config);

// Autoload .torrent files from torrentsDir on startup
if (config.autoLoad) {
  try {
    const files = await readdir(config.torrentsDir);
    const torrents = files.filter((f) => f.endsWith(".torrent"));

    if (torrents.length > 0) {
      console.log(`Loading ${torrents.length} torrent(s) from ${config.torrentsDir}…`);
      for (const file of torrents) {
        const path = join(config.torrentsDir, file);
        const buf = Buffer.from(await Bun.file(path).arrayBuffer());
        try {
          const state = await registry.addTorrent(buf);
          console.log(`  ✓ ${state.name} [${state.infoHashHex.slice(0, 8)}]`);
        } catch (err) {
          console.warn(`  ✗ Failed to load ${file}: ${err instanceof Error ? err.message : err}`);
        }
      }
    }
  } catch (err) {
    const code = (err as NodeJS.ErrnoException).code;
    if (code === "ENOENT") {
      // torrentsDir doesn't exist yet — that's fine
    } else {
      console.error(`Failed to read torrents directory (${config.torrentsDir}):`, err);
    }
  }
}

// Graceful shutdown
async function shutdown() {
  console.log("\nShutting down — sending stopped announces…");
  await registry.stopAll();
  process.exit(0);
}

process.on("SIGINT", shutdown);
process.on("SIGTERM", shutdown);

startServer(registry, config, config.port);