import { transformEIP1193Provider } from "@abstract-foundation/agw-client";
import { toPrivyWalletProvider } from "@privy-io/cross-app-connect";
import { type EIP1193Provider, http } from "viem";

import abstractIcon from "./abstract-icon.js";
import type {
  AnnounceProviderParameters,
  AnnounceProviderReturnType,
  EIP6963ProviderDetail,
  EIP6963ProviderInfo,
} from "./types.js";

class EIP6963AnnounceProviderEvent extends CustomEvent<EIP6963ProviderDetail> {
  constructor(detail: EIP6963ProviderDetail) {
    super("eip6963:announceProvider", { detail });
  }
}

const eip6963info: EIP6963ProviderInfo = {
  uuid: "2306fd26-fcfb-4f9e-87da-0d1e237e917c",
  name: "Abstract Global Wallet",
  icon: abstractIcon,
  rdns: "xyz.abs.privy",
};

export function announceProvider({
  chain,
  transport,
  customPaymasterHandler,
}: AnnounceProviderParameters): AnnounceProviderReturnType {
  if (typeof window === "undefined") {
    return () => void 0;
  }

  const resolvedTransport =
    transport ??
    http(undefined, {
      batch: true,
    });

  const privyProvider = toPrivyWalletProvider({
    chainId: chain.id,
    providerAppId: "cm04asygd041fmry9zmcyn5o5",
    chains: [chain],
    transports: {
      [chain.id]: resolvedTransport,
    },
  }) as EIP1193Provider;

  const abstractProvider = transformEIP1193Provider({
    provider: privyProvider,
    chain,
    transport: resolvedTransport,
    isPrivyCrossApp: true,
    customPaymasterHandler,
  });

  const event = new EIP6963AnnounceProviderEvent({
    info: eip6963info,
    provider: abstractProvider,
  });

  window.dispatchEvent(event);

  const handler = () => window.dispatchEvent(event);
  window.addEventListener("eip6963:requestProvider", handler);
  return () => window.removeEventListener("eip6963:requestProvider", handler);
}