// Server-side only — imported exclusively from API route handlers.
// configManager reads from node:fs/promises and cannot run in the browser.
if (typeof window !== "undefined") {
  throw new Error("lib/vnctalk/client.ts is server-only");
}

import { configManager } from "@/lib/admin/config-manager";

export interface CreateVncMeetingParams {
  name: string;
  start: string;
  end: string;
  invitees: string[];
  password?: string;
  description?: string;
}

export interface CreateVncMeetingResult {
  meetingUrl: string;
  meetingId: string;
}

export async function createVncMeeting(
  params: CreateVncMeetingParams
): Promise<CreateVncMeetingResult> {
  const serverUrl = configManager.get<string>("vnctalkServerUrl") || process.env.VNCTALK_SERVER_URL || "";

  if (!serverUrl) {
    throw new Error("VNCTALK_SERVER_URL is not configured");
  }

  const endpoint = `${serverUrl.replace(/\/+$/, "")}/api/createnewmeeting`;

  const response = await fetch(endpoint, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      name: params.name,
      start: params.start,
      end: params.end,
      invitees: params.invitees,
      password: params.password,
      description: params.description,
    }),
  });

  if (!response.ok) {
    const text = await response.text().catch(() => "");
    throw new Error(`VNCtalk API error ${response.status}: ${text}`);
  }

  const data = await response.json();

  const meetingUrl: string = data.meetingUrl || data.meeting_url || data.url || "";
  const meetingId: string = data.meetingId || data.meeting_id || data.id || "";

  if (!meetingUrl) {
    throw new Error("VNCtalk API did not return a meeting URL");
  }

  return { meetingUrl, meetingId };
}