import BigNumber from 'bignumber.js'

export enum Denomination {
  /**
   * values for asset amounts in base units (no decimal)
   */
  Base = 'BASE',
  /**
   * values of asset amounts (w/ decimal)
   */
  Asset = 'ASSET',
}

export type Amount<T> = T extends Denomination
  ? {
      type: T
      amount: () => BigNumber
      plus: (value: BigNumber.Value | Amount<T>, decimal?: number) => Amount<T>
      minus: (value: BigNumber.Value | Amount<T>, decimal?: number) => Amount<T>
      times: (value: BigNumber.Value | Amount<T>, decimal?: number) => Amount<T>
      div: (value: BigNumber.Value | Amount<T>, decimal?: number) => Amount<T>
      gt: (value: BigNumber.Value | Amount<T>) => boolean
      gte: (value: BigNumber.Value | Amount<T>) => boolean
      lt: (value: BigNumber.Value | Amount<T>) => boolean
      lte: (value: BigNumber.Value | Amount<T>) => boolean
      eq: (value: BigNumber.Value | Amount<T>) => boolean
      decimal: number
    }
  : never

export type BaseAmount = Amount<Denomination.Base>
export type AssetAmount = Amount<Denomination.Asset>