import type { SharePayload } from "expo-sharing";

const IOS_APP_GROUP_UNAVAILABLE_ERROR_CODE = "ERR_FAILED_TO_RESOLVE_APP_GROUP_ID";

function errorCode(error: unknown): string | null {
  if (typeof error !== "object" || error === null || !("code" in error)) {
    return null;
  }
  return typeof error.code === "string" ? error.code : null;
}

/**
 * Normalizes the native "share into" capability to an empty inbox. Personal
 * Team builds cannot include the App Group that expo-sharing reads from.
 */
export function createIncomingSharePayloadReader(input: {
  readonly platform: string;
  readonly readPayloads: () => ReadonlyArray<SharePayload>;
}): () => ReadonlyArray<SharePayload> {
  let isUnavailable = false;

  return () => {
    if (isUnavailable) {
      return [];
    }

    try {
      return input.readPayloads();
    } catch (error) {
      if (input.platform === "ios" && errorCode(error) === IOS_APP_GROUP_UNAVAILABLE_ERROR_CODE) {
        isUnavailable = true;
        return [];
      }
      throw error;
    }
  };
}