import { NextResponse } from "next/server";
import { getLiveKitRoomName, getLiveKitRoomService } from "@/lib/meeting/livekit";
import { markMeetingParticipantKicked } from "@/lib/meeting/kicks";
import { verifyMeetingToken } from "@/lib/meeting/token";

export const dynamic = "force-dynamic";

type Args = { params: Promise<{ slug: string }> };

export async function POST(request: Request, { params }: Args) {
  const { slug } = await params;
  const authorization = request.headers.get("authorization") ?? "";
  const appToken = authorization.startsWith("Bearer ") ? authorization.slice(7) : "";
  const host = verifyMeetingToken(appToken);
  if (!host || host.eventSlug !== slug || host.role !== "host") {
    return NextResponse.json({ error: "Nur der Host darf Teilnehmer entfernen." }, { status: 403 });
  }

  let body: { participantId?: unknown };
  try {
    body = await request.json();
  } catch {
    return NextResponse.json({ error: "Ungültige Anfrage." }, { status: 400 });
  }
  const participantId = typeof body.participantId === "string" ? body.participantId.trim() : "";
  if (!participantId || participantId.length > 100 || participantId === host.participantId) {
    return NextResponse.json({ error: "Ungültiger Teilnehmer." }, { status: 400 });
  }

  try {
    const roomService = getLiveKitRoomService();
    const room = getLiveKitRoomName(slug);
    const participant = (await roomService.listParticipants(room)).find((item) => item.identity === participantId);
    if (!participant) return NextResponse.json({ error: "Teilnehmer nicht gefunden." }, { status: 404 });

    let clientId: string | undefined;
    try {
      const metadata = JSON.parse(participant.metadata || "{}") as { clientId?: unknown };
      if (typeof metadata.clientId === "string" && metadata.clientId.length <= 100) clientId = metadata.clientId;
    } catch {
      // Metadata is optional; the participant identity is still revoked below.
    }
    markMeetingParticipantKicked(slug, participantId, clientId);
    await roomService.removeParticipant(room, participantId);
    return NextResponse.json({ ok: true });
  } catch (error) {
    console.error("meeting participant kick failed", error);
    return NextResponse.json({ error: "Der Teilnehmer konnte nicht entfernt werden." }, { status: 503 });
  }
}