// File: src/HypernativeModule.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ProtectedContract, ContractType} from "./HypernativeModuleStructsAndEnums.sol";

interface ISafe {
    function execTransactionFromModule(address to, uint256 value, bytes memory data, uint8 operation) external returns (bool success);
}

contract HypernativeModule is Ownable {
    address public updater;
    bytes constant public pauseSelector = abi.encodeWithSignature("pause()");
    bytes constant public emergencyShutdownSelector = abi.encodeWithSignature("emergencyShutdown()");
    
    mapping (ContractType => bytes) public contractTypeToPauseFunction;
    ProtectedContract[] public protectedContracts;
    ISafe public safe;

    constructor(address multisig, address _updater, ProtectedContract[] memory _protectedContracts) {
        safe = ISafe(multisig);
        updater = _updater;
        contractTypeToPauseFunction[ContractType.JUNIOR_OR_SENIOR] = pauseSelector;
        contractTypeToPauseFunction[ContractType.TRANCH] = emergencyShutdownSelector;
        for (uint i = 0; i < _protectedContracts.length; ++i) {
            protectedContracts.push(_protectedContracts[i]);
        }
    }

    modifier onlyUpdater() {
        require(msg.sender == updater, "HypernativeModule: Only Updater");
        _;
    }

    modifier onlyOwnerOrUpdater() {
        require(msg.sender == updater || msg.sender == owner(), "HypernativeModule: Only Updater or Owner");
        _;
    }

    function pauseAllContracts() public onlyOwner {
        uint256 protectedContractLength = protectedContracts.length;
        for (uint i = 0; i < protectedContractLength;) {
            safe.execTransactionFromModule(protectedContracts[i].contractAddress, 0, contractTypeToPauseFunction[protectedContracts[i].contractType],0);
            unchecked {
                ++i;
            }
        }
    }

    function pauseContractsByType(ContractType _contractType) public onlyOwner {
        uint256 protectedContractLength = protectedContracts.length;
        for (uint i = 0; i < protectedContractLength;) {
            if (protectedContracts[i].contractType == _contractType) {
                safe.execTransactionFromModule(protectedContracts[i].contractAddress, 0, contractTypeToPauseFunction[_contractType], 0);
            }
            unchecked {
                ++i;
            }
        }
    }

    function updateProtectedContracts(ProtectedContract[] memory _protectedContracts) public onlyUpdater {
        uint256 _protectedContractsLength = _protectedContracts.length;
        for (uint i = 0; i < _protectedContractsLength;) {
            protectedContracts.push(_protectedContracts[i]);
        }
    }
    
    function replaceProtectedContracts(ProtectedContract[] memory _protectedContracts) public onlyUpdater {
        assembly {
            sstore(protectedContracts.slot, mload(_protectedContracts))
        }
        uint256 _protectedContractsLength = _protectedContracts.length;
        for (uint i = 0; i < _protectedContractsLength;) {
            protectedContracts[i] = _protectedContracts[i];
            unchecked {
                ++i;
            }
        }
    }

    function updateMultisigAddress(address newMultisig) public onlyOwner {
        safe = ISafe(newMultisig);
    }

    function getProctectedContracts() public view returns (ProtectedContract[] memory) {
        return protectedContracts;
    }

    function isContractProtected(address _address) public view returns (bool) {
        for (uint i = 0; i < protectedContracts.length; ++i) {
            if (protectedContracts[i].contractAddress == _address) {
                return true;
            }
        }
        return false;
    }

    function changeUpdater(address _updater) public onlyOwnerOrUpdater {
        updater = _updater;
    }
}

// File: lib/openzeppelin-contracts/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: src/HypernativeModuleStructsAndEnums.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

enum ContractType {
    JUNIOR_OR_SENIOR,
    TRANCH
}

struct ProtectedContract {
    address contractAddress;
    ContractType contractType;
}
// File: lib/openzeppelin-contracts/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}