export default {
  async fetch(request) {
    const url = new URL(request.url);

    // 1) Static m3u8 banayen jo TS ko hamare proxy se bulaye
    if (url.pathname.endsWith("/playlist.m3u8")) {
      // Apne TS links yahan add karo (1 ya zyada)
      const LINKS = [
        "http://d4k4u.com/live/Zak11_375144/QnS6dehx/690035.ts"
        // , "http://d4k4u.com/live/Zak11_375144/QnS6dehx/690036.ts"  // example
      ];

      let body = "#EXTM3U\n";
      body += "#EXT-X-VERSION:3\n";
      body += "#EXT-X-TARGETDURATION:10\n";
      body += "#EXT-X-MEDIA-SEQUENCE:0\n";

      for (const L of LINKS) {
        body += "#EXTINF:10.0,\n";
        body += "/proxy?u=" + encodeURIComponent(L) + "\n";
      }
      body += "#EXT-X-ENDLIST\n";

      return new Response(body, {
        headers: {
          "Content-Type": "application/vnd.apple.mpegurl",
          "Access-Control-Allow-Origin": "*",
          "Cache-Control": "no-store"
        }
      });
    }

    // 2) Proxy endpoint: asal .ts ko fetch karke CORS/HTTPS ke sath serve karo
    if (url.pathname.startsWith("/proxy")) {
      const target = url.searchParams.get("u");
      if (!target) return new Response("Missing ?u=", { status: 400 });

      const upstream = await fetch(target, {
        headers: {
          // Kuch servers UA/Referer check karte hain
          "User-Agent": "Mozilla/5.0",
          "Referer": new URL(target).origin + "/"
        }
      });

      const headers = new Headers(upstream.headers);
      headers.set("Content-Type", "video/mp2t");       // TS MIME
      headers.set("Access-Control-Allow-Origin", "*"); // CORS OK
      headers.set("Cache-Control", "no-store");        // live-ish

      return new Response(upstream.body, {
        status: upstream.status,
        headers
      });
    }

    // Help text
    return new Response(
      "OK: use /playlist.m3u8 in your HLS player, or /proxy?u=<encoded ts>",
      { headers: { "Content-Type": "text/plain" } }
    );
  }
}