import { createContext, useContext } from 'react';

export type HashRouterConfig = {
  enabled?: boolean;
  basename?: string;
};

export type ClientConfig = {
  defaultHomeserver?: number;
  homeserverList?: string[];
  allowCustomHomeservers?: boolean;

  featuredCommunities?: {
    openAsDefault?: boolean;
    spaces?: string[];
    rooms?: string[];
    servers?: string[];
  };

  hashRouter?: HashRouterConfig;
  gifApiKey?: string;

  /**
   * [Gitea #43] Absolute https URL of the Element Call page on its own origin.
   * Unset: the bundled copy on this origin. Ignored in the desktop app.
   */
  elementCallUrl?: string;

  /**
   * [Gitea #43] Desktop only: the loopback origin the desktop app's local
   * server also answers on (e.g. "http://127.0.0.1:44548"), to load the
   * bundled call page from a different origin than the app
   * ("http://localhost:44548"). Set by cinny-desktop together with the server
   * and CSP changes it needs; unset keeps the same-origin call page.
   */
  desktopCallOrigin?: string;

  /**
   * [Gitea #124] Uptime Kuma status page per homeserver, for the status banner:
   * { "<server name>": { url, slug, groups?: { homeserver, calls, login } } }.
   * Homeservers not listed never contact Kuma.
   */
  statusPages?: Record<string, unknown>;

  /**
   * Absolute https URL of the public web app (e.g. https://chat.lotusguild.org).
   * The desktop app sets it so it can hand calls it can't make to the browser.
   */
  webAppUrl?: string;
};

const ClientConfigContext = createContext<ClientConfig | null>(null);

export const ClientConfigProvider = ClientConfigContext.Provider;

export function useClientConfig(): ClientConfig {
  const config = useContext(ClientConfigContext);
  if (!config) throw new Error('Client config are not provided!');
  return config;
}

export const clientDefaultServer = (clientConfig: ClientConfig): string =>
  clientConfig.homeserverList?.[clientConfig.defaultHomeserver ?? 0] ?? 'matrix.org';

export const clientAllowedServer = (clientConfig: ClientConfig, server: string): boolean => {
  const { homeserverList, allowCustomHomeservers } = clientConfig;

  if (allowCustomHomeservers) return true;

  return homeserverList?.includes(server) === true;
};