import { getAssetInfo } from '@defisaver/tokens';
import { Action } from '../../Action';
import { getAddr } from '../../addresses';
import { EthAddress, uint256, int256 } from '../../types';

/**
 * CurveUsdPaybackAction - Action that pays back crvUSD to a curveusd position
 *
 * @category CurveUsd
 */
export class CurveUsdPaybackAction extends Action {
  /**
   * address controllerAddress - Address of the curveusd market controller
   * address from - Address from which to pull crvUSD, will default to proxy
   * address onBehalfOf - Address for which we are paying back debt, will default to proxy
   * address to - Address that will receive the crvUSD and collateral asset if close, will default to proxy
   * uint256 debtAmount - Amount of crvUSD to payback
   * int256 maxActiveBand - Don't allow active band to be higher than this (to prevent front-running the repay)
   */
  /// @dev debtAmount must be non-zero
  /// @dev if debtAmount >= debt will repay whole debt and close the position, transfering collateral
  constructor(
    controllerAddress: EthAddress,
    from: EthAddress,
    onBehalfOf: EthAddress,
    to: EthAddress,
    debtAmount: uint256,
    maxActiveBand: int256,
  ) {
    super(
      'CurveUsdPayback',
      getAddr('CurveUsdPayback'),
      ['address', 'address', 'address', 'address', 'uint256', 'int256'],
      [controllerAddress, from, onBehalfOf, to, debtAmount, maxActiveBand],
    );

    this.mappableArgs = [
      ...this.args,
    ];
  }

  async getAssetsToApprove() {
    return [{
      owner: this.args[1],
      asset: getAssetInfo('crvUSD').address,
    }];
  }
}