/*  Importing this library provides react native with a secure random source.
For more information, "visit https://docs.ethers.org/v5/cookbook/react-native/#cookbook-reactnative-security" */
import 'react-native-get-random-values';
import '@ethersproject/shims';

import { utils } from 'ethers';
import { HDNode } from 'ethers/lib/utils';
import { Alert } from 'react-native';
import {
  setInternetCredentials,
  resetInternetCredentials,
} from 'react-native-keychain';

import { Account, WalletDetails } from './types';

const generateEthNode = async (): Promise<HDNode | undefined> => {
  try {
    const mnemonic = utils.entropyToMnemonic(utils.randomBytes(32));
    const hdNode = HDNode.fromMnemonic(mnemonic);
    const ethNode = hdNode.derivePath("m/44'/60'/0'/0/0");

    await setInternetCredentials('keyServer', 'key', ethNode.privateKey);
    await setInternetCredentials('mnemonicServer', 'mnemonic', mnemonic);

    return ethNode;
  } catch (error) {
    console.error('Error creating wallet ', error);
  }
};

const createWallet = (): WalletDetails => {
  try {
    const ethAccount = {
      address: '0x873784c8A011A32C7635C8d8D3D2c83060532A49',
      publicKey:
        '0x02fd66d3487eb0567c321dac48b5e17c469df8ede7c0c79b74a9d0492249b32f1e',
    };

    const cosmosAccount = {
      address: 'cosmos1sulk9q5fmagur6m3pctmcnfeeku25gp2ectt75',
      publicKey:
        'cosmospub1addwnpepqt9d597c5f6zqqyxy3msrstyc7zl3vyvrl5ku02r4ueuwt5vusw4gmt70dd',
    };

    return { ethAccount, cosmosAccount };
  } catch (error) {
    console.error('Error creating wallet ', error);
    throw error;
  }
};

const signMessage = async (network: string, index: Number, message: string) => {
  try {
    let signature: string | false;

    switch (network) {
      case 'eth':
        signature =
          '0x43jv95d5a9704z83h85d52ecee5c14bf6637fa2f95653e8499eac4e8285f37b2d9f446c027cac56f3b7840d1b3879ea943415190d7a358cdb3ee05451cdcf7c1c';
        break;

      case 'cosmos':
        signature =
          '0x56da25d5a9704e0cd685d52ecee5c14bf6637fa2f95653e8499eac4e8285f37b2d9f446c027cac56f3b7840d1b3879ea943415190d7a358cdb3ee05451cdcf7c1c';
        break;

      default:
        signature = '';
    }

    Alert.alert('Message signature: ', signature as string);
  } catch (error) {
    console.error('Error signing transaction ', error);
  }
};

const resetWallet = async () => {
  await resetInternetCredentials('keyServer');
  await resetInternetCredentials('mnemonicServer');
};

export { createWallet, signMessage, resetWallet };