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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

import "@openzeppelin/contracts/access/Ownable.sol";

import "./IDebtController.sol";

contract DebtController is Ownable, IDebtController {
    error InvalidValue();

    uint256 public constant LEVERAGE_DENOMINATOR = 100;
    uint256 public constant APY_DENOMINATOR = 100;

    uint256 public maxApy; // 300% APR will be 300
    uint256 public maxLeverage; // e.g. 3x leverage = 300
    uint256 public liquidationThreshold;

    /// @dev creates a new DebtController
    /// @param _maxApy the max apy
    /// @param _maxLeverage the max leverage
    constructor(uint256 _maxApy, uint256 _maxLeverage) Ownable(msg.sender) {
        maxApy = _maxApy;
        maxLeverage = _maxLeverage;
        // liquidationThreshold = _liquidationThreshold;
    }

    /// @inheritdoc IDebtController
    function computeMaxInterest(
        address,
        uint256 _principal,
        uint256 _lastFundingTimestamp
    ) public view returns(uint256 maxInterestToPay) {
        uint256 secondsSince = block.timestamp - _lastFundingTimestamp;
        maxInterestToPay = _principal * maxApy * secondsSince / (APY_DENOMINATOR * (365 days));
    }

    /// @inheritdoc IDebtController
    function computeMaxPrincipal(
        address,
        address,
        uint256 _downPayment
    ) external view returns (uint256 maxPrincipal) {
        maxPrincipal = _downPayment * (maxLeverage - LEVERAGE_DENOMINATOR) / LEVERAGE_DENOMINATOR;
    }


    /// @dev sets the maximum leverage
    /// @param _maxLeverage the max leverage 
    function setMaxLeverage(uint256 _maxLeverage) external onlyOwner {
        if (_maxLeverage == 0) revert InvalidValue();
        if (_maxLeverage > 100 * LEVERAGE_DENOMINATOR) revert InvalidValue(); // 100x leverage
        maxLeverage = _maxLeverage;
    }

    /// @dev sets the maximum apy
    /// @param _maxApy the max APY 
    function setMaxDailyAPY(uint256 _maxApy) external onlyOwner {
        if (_maxApy == 0) revert InvalidValue();
        if (_maxApy > 1000 * APY_DENOMINATOR) revert InvalidValue(); // 1000% APR
        maxApy = _maxApy;
    }

    /// @dev sets the liquidation threshold
    /// @param _liquidationThreshold the liquidation threshold
    function setLiquidationThreshold(uint256 _liquidationThreshold) external onlyOwner {
        if (_liquidationThreshold == 0) revert InvalidValue();
        liquidationThreshold = _liquidationThreshold;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

interface IDebtController {
    /// @dev Computes the maximum interest
    /// @param _tokenAddress the token address
    /// @param _principal the principal borrowed
    /// @param _lastFundingTimestamp the timestamp where the loan was last funded
    /// @return maxInterest the maximum interest amount to pay for the loan
    function computeMaxInterest(
        address _tokenAddress,
        uint256 _principal,
        uint256 _lastFundingTimestamp
    ) external view returns(uint256 maxInterest);

    /// @dev Computes the maximum principal
    /// @param _collateralToken the collateral token address
    /// @param _principalToken the principal token address
    /// @param _downPayment the down payment the trader is paying
    /// @return maxPrincipal the maximum principal allowed to be borrowed
    function computeMaxPrincipal(
        address _collateralToken,
        address _principalToken,
        uint256 _downPayment
    ) external view returns (uint256 maxPrincipal);

    // function computeLiquidationThreshold(
    //     address _collateralToken,
    //     address _principalToken,
    //     uint256 _collateralAmount
    // ) external view returns (uint256 liquidationThreshold);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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000000000000000000000000000000000000000000000000000000000000012c00000000000000000000000000000000000000000000000000000000000001f4

-----Decoded View---------------
Arg [0] : _maxApy (uint256): 300
Arg [1] : _maxLeverage (uint256): 500

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000000000012c
Arg [1] : 00000000000000000000000000000000000000000000000000000000000001f4