/*
 * This file is part of the Meeds project (https://meeds.io/).
 * 
 * Copyright (C) 2022 Meeds Association contact@meeds.io
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

export function isMetamaskInstalled() {
  return MetaMaskOnboarding.isMetaMaskInstalled();
}

export async function signInWithMetamask(rawMessage, isMobile) {
  if (!MetaMaskOnboarding.isMetaMaskInstalled()) {
    const onboarding = new MetaMaskOnboarding();
    return onboarding.startOnboarding();
  } else {
    await chooseAccount(isMobile);
    const provider = new window.ethers.providers.Web3Provider(window.ethereum);
    const signer = provider.getSigner();
    const signedMessage = await signer.signMessage(rawMessage);
    return `SIGNED_MESSAGE@${signedMessage}`;
  }
}

export async function chooseAccount(isMobile) {
  try {
    const accounts = await window.ethereum.request({
      method: 'wallet_requestPermissions',
      params: [{
        eth_accounts: {},
      }]
    });
    const account = accounts?.length && accounts[0];
    if (!account && !isMobile) {
      throw new Error('No selected account');
    }
  } catch (e) {
    if (!String(e).includes('32601')) {
      throw e;
    }
  }
  return retrieveAddress();
}

export function retrieveAddress() {
  return window.ethereum.request({ method: 'eth_accounts' })
    .then(address => address?.length && address[0] || null);
}

export function isAddress(address) {
  return window.ethers.utils.isAddress(address);
}
