// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

// simplified interface to expose functions added events for tests
interface IGovernance {
  /**
   Added for test purposes
   **/
  event ReserveInitialized(
    address indexed asset,
    address indexed aToken,
    address stableDebtToken,
    address variableDebtToken,
    address interestRateStrategyAddress
  );
  enum ProposalState {Pending, Canceled, Active, Failed, Succeeded, Queued, Expired, Executed}

  /**
   * @dev Creates a Proposal (needs Proposition Power of creator > Threshold)
   * @param executor The ExecutorWithTimelock contract that will execute the proposal
   * @param targets list of contracts called by proposal's associated transactions
   * @param values list of value in wei for each propoposal's associated transaction
   * @param signatures list of function signatures (can be empty) to be used when created the callData
   * @param calldatas list of calldatas: if associated signature empty, calldata ready, else calldata is arguments
   * @param withDelegatecalls if true, transaction delegatecalls the taget, else calls the target
   * @param ipfsHash IPFS hash of the proposal
   **/
  function create(
    address executor,
    address[] memory targets,
    uint256[] memory values,
    string[] memory signatures,
    bytes[] memory calldatas,
    bool[] memory withDelegatecalls,
    bytes32 ipfsHash
  ) external returns (uint256);

  /**
   * @dev Cancels a Proposal,
   * either at anytime by guardian
   * or when proposal is Pending/Active and threshold no longer reached
   * @param proposalId id of the proposal
   **/
  function cancel(uint256 proposalId) external;

  /**
   * @dev Queue the proposal (If Proposal Succeeded)
   * @param proposalId id of the proposal to queue
   **/
  function queue(uint256 proposalId) external;

  /**
   * @dev Execute the proposal (If Proposal Queued)
   * @param proposalId id of the proposal to execute
   **/
  function execute(uint256 proposalId) external payable;

  /**
   * @dev Function allowing msg.sender to vote for/against a proposal
   * @param proposalId id of the proposal
   * @param support boolean, true = vote for, false = vote against
   **/
  function submitVote(uint256 proposalId, bool support) external;

  /**
   * @dev Function to register the vote of user that has voted offchain via signature
   * @param proposalId id of the proposal
   * @param support boolean, true = vote for, false = vote against
   * @param v v part of the voter signature
   * @param r r part of the voter signature
   * @param s s part of the voter signature
   **/
  function submitVoteBySignature(
    uint256 proposalId,
    bool support,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external;

  /**
   * @dev Getter of the proposal count (the current number of proposals ever created)
   * @return the proposal count
   **/
  function getProposalsCount() external view returns (uint256);

  function getProposalState(uint256 proposalId) external view returns (ProposalState);

  function getGuardian() external view returns (address);
}