import { registerWallet } from '@wallet-standard/wallet';
import { SolflareMetaMaskWallet } from './wallet';

let isInitialized = false;

export function initialize(): void {
  if (typeof window === 'undefined') {
    return;
  }

  if (isInitialized) {
    return;
  }

  isInitialized = true;

  registerWallet(new SolflareMetaMaskWallet());
}

export async function initializeWhenDetected(): Promise<void> {
  if (typeof window === 'undefined') {
    return;
  }

  if (isInitialized) {
    return;
  }

  const id = 'solflare-detect-metamask';

  function postMessage() {
    window.postMessage(
      {
        target: 'metamask-contentscript',
        data: {
          name: 'metamask-provider',
          data: {
            id,
            jsonrpc: '2.0',
            method: 'wallet_getSnaps'
          }
        }
      },
      window.location.origin
    );
  }

  function onMessage(event: MessageEvent) {
    const message = event.data;
    if (message?.target === 'metamask-inpage' && message.data?.name === 'metamask-provider') {
      if (message.data.data?.id === id) {
        window.removeEventListener('message', onMessage);

        if (!message.data.data.error) {
          initialize();
        }
      } else {
        postMessage();
      }
    }
  }

  window.addEventListener('message', onMessage);
  window.setTimeout(() => window.removeEventListener('message', onMessage), 5000);

  postMessage();
}