import { MultiCallABI } from '../constants'
import { useMulticallAddress } from './useMulticallAddress'
import { Falsy } from '../model/types'
import { BigNumber } from 'ethers'
import { QueryParams } from '../constants/type/QueryParams'
import { useCall } from './useCall'
import { Contract } from 'ethers'

/**
 * Returns ether balance of a given account.
 * @param address address of an account
 * @returns a balance of the account which is BigNumber or `undefined` if not connected to network or address is a falsy value
 * @public
 *
 * @example
 * const { account } = useEthers()
 * const etherBalance = useEtherBalance(account)
 *
 * return (
 *   {etherBalance && <p>Ether balance: {formatEther(etherBalance)} ETH </p>}
 * )
 */
export function useEtherBalance(address: string | Falsy, queryParams: QueryParams = {}): BigNumber | undefined {
  const multicallAddress = useMulticallAddress(queryParams)
  const { value: value } =
    useCall(
      multicallAddress &&
        address && {
          contract: new Contract(multicallAddress, MultiCallABI),
          method: 'getEthBalance',
          args: [address],
        },
      queryParams
    ) ?? {}
  return value?.[0]
}