import { type Chain } from 'viem';

import config from 'configs/app';

export const currentChain: Chain = {
  id: Number(config.chain.id),
  name: config.chain.name ?? '',
  nativeCurrency: {
    decimals: config.chain.currency.decimals,
    name: config.chain.currency.name ?? '',
    symbol: config.chain.currency.symbol ?? '',
  },
  rpcUrls: {
    'default': {
      http: config.chain.rpcUrls,
    },
  },
  blockExplorers: {
    'default': {
      name: 'Blockscout',
      url: config.app.baseUrl,
    },
  },
  testnet: config.chain.isTestnet,
};

export const parentChain: Chain | undefined = (() => {
  const rollupFeature = config.features.rollup;

  const parentChain = rollupFeature.isEnabled && rollupFeature.parentChain;

  if (!parentChain) {
    return;
  }

  if (!parentChain.id || !parentChain.name || !parentChain.rpcUrls || !parentChain.baseUrl || !parentChain.currency) {
    return;
  }

  return {
    id: parentChain.id,
    name: parentChain.name,
    nativeCurrency: parentChain.currency,
    rpcUrls: {
      'default': {
        http: parentChain.rpcUrls,
      },
    },
    blockExplorers: {
      'default': {
        name: 'Blockscout',
        url: parentChain.baseUrl,
      },
    },
    testnet: parentChain.isTestnet,
  };
})();