// File: 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;
    }
}

// File: earning.sol



// SPDX-License-Identifier:MIT
pragma solidity 0.8.18;

import "./SafeMath.sol";
import "./IERC20.sol";
import "./Ownable.sol";

contract AutonomusEarning is Ownable {
    using SafeMath for uint256;

    enum STATUS {
        ACTIVE,
        COMPLETED
    }

    struct LendInterfce {
        address user;
        uint256 amount;
        STATUS status;
        uint256 startDay;
        uint256 endDay;
    }

    struct Percent {
        uint256 amount;
        uint256 date;
        uint256 edate;
    }

    Percent[] percent;
    LendInterfce[] internal lenders;
    IERC20 token;

    bool start = true;
    uint256 startDate = block.timestamp;

    uint32 DAY_IN_SECONDS = 24 * 60 * 60;
    uint16[] periodInDays = [30, 60, 90, 180, 270, 360, 720, 1440];
    uint256 MINIMUM_AMOUT = 1;
    uint16 PERCENT_DENOMINATOR = 1000;
    uint16 YEAR = 365;
    uint256 PRECISION = 100000;
    uint256 LEND = 0;
    uint256 WITHDRAW = 0;

    event Lend(address user, uint256 amount, uint256 start, uint256 end);
    event Withdraw(address indexed user, uint256 amount, uint256 date);
    event Received(address, uint256);

    mapping(address => uint256[]) lendingsMap;

    constructor(address _token) {
        require(_token != address(0), "Invalid address for token");
        token = IERC20(_token);
        percent.push(Percent(120, _getCurrentDay(), 0));
    }

    receive() external payable {
        emit Received(msg.sender, msg.value);
    }

    fallback() external payable {
        emit Received(msg.sender, msg.value);
    }

    function enableLend() external onlyOwner {
        require(start == false, "Lending enabled");
        start = true;
    }

    function disableLend() external onlyOwner {
        require(start == true, "Lending disabled");
        start = false;
    }

    function setMinAmount(uint256 amount) external onlyOwner {
        require(amount > 0, "MINIMUM_AMOUT > 0");
        MINIMUM_AMOUT = amount;
    }

    function pushPercent(uint256 p) external onlyOwner {
        require(p > 0, "PERCENT > 0");
        uint256 date = _getCurrentDay();
        percent.push(Percent(p, date, 0));
        if (percent.length > 1) {
            percent[percent.length - 2].edate = date;
        }
    }

    function pushPeriodInDays(uint16 p) external onlyOwner {
        require(p > 0, "percent > 0");
        periodInDays.push(p);
    }

    function popPeriodInDays(uint256 index) external onlyOwner {
        require(periodInDays.length > index, "index > 0");
        periodInDays[index] = periodInDays[periodInDays.length - 1];
        periodInDays.pop();
    }

    modifier calculation(uint256 index) {
        require(lenders.length > index, "Incorrect lender");
        require(lenders[index].user == address(msg.sender), "Not owner");
        _;
    }

    function params()
        external
        view
        returns (
            address,
            uint256,
            uint256,
            uint256,
            uint256,
            bool
        )
    {
        return (address(token), MINIMUM_AMOUT, startDate, LEND, WITHDRAW, start);
    }

    function getLenderSize() external view returns (uint256) {
        return lenders.length;
    }

    function getLender(uint256 index)
        external
        view
        returns (LendInterfce memory)
    {
        require(lenders.length > index, "Incorrect lender");
        return lenders[index];
    }

    function userLendings() external view returns (uint256[] memory) {
        return lendingsMap[address(msg.sender)];
    }

    function getPercent(uint256 index) external view returns (Percent memory) {
        require(percent.length > index, "Incorrect lender");
        return percent[index];
    }

    function getPercentSize() external view returns (uint256) {
        return percent.length;
    }

    function getPeriod(uint256 index) external view returns (uint16) {
        require(periodInDays.length > index, "Incorrect lender");
        return periodInDays[index];
    }

    function getPeriodSize() external view returns (uint256) {
        return periodInDays.length;
    }

    function getTokenBalance() external view returns (uint256) {
        return token.balanceOf(address(this));
    }

    function getBalance() external view returns (uint256) {
        return address(this).balance;
    }

    function getCurrentDate() external view returns (uint256) {
        return block.timestamp;
    }

    function withdraw() external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "Insufficient balance");
        address payable owner = payable(owner());
        owner.transfer(balance);
    }

    function withdrawToken(IERC20 _token) external onlyOwner {
        uint256 balance = _token.balanceOf(address(this));
        require(balance > 0, "Insufficient balance");
        require(_token.transfer(address(owner()), balance), "Transfer failed");
    }

    function getCurrentDay() external view returns (uint256) {
        return _getCurrentDay();
    }

    function _getCurrentDay() internal view returns (uint256) {
        uint256 date = (block.timestamp.sub(startDate)).div(DAY_IN_SECONDS);
        return date;
    }

    function lend(uint256 amount, uint256 periodIndex) external {
        _lend(amount, periodIndex);
    }

    function _lend(uint256 amount, uint256 periodIndex) internal {
        require(start == true, "Staking not started");
        require(amount >= MINIMUM_AMOUT, "Amount should be greater than 100");

        require(amount > 0, "Amount should be greater than 0");
        require(
            (periodIndex >= 0 && periodInDays.length > periodIndex),
            "Amount should be range"
        );

        require(
            token.balanceOf(address(msg.sender))  >= amount,
            "Insufficient balance"
        );

        require(
            token.transferFrom(address(msg.sender), address(this.owner()), amount),
            "Transfer failed"
        );

        uint256 startdate = _getCurrentDay();
        uint256 enddate = startdate.add(periodInDays[periodIndex]);
        LEND = LEND.add(amount);

        lenders.push(
            LendInterfce(
                address(msg.sender),
                amount,
                STATUS.ACTIVE,
                startdate,
                enddate
            )
        );

        lendingsMap[address(msg.sender)].push(lenders.length - 1);
        emit Lend(address(msg.sender), amount, startdate, enddate);
    }

    function calculateEarn(uint256 index)
        external
        view
        returns (uint256, uint256)
    {
        return _calculateEarn(index);
    }

    function _calculateEarn(uint256 index)
        internal
        view
        returns (uint256, uint256)
    {
        LendInterfce memory ll = lenders[index];
        uint256 pr = 0;
        uint256 di = 0;

        for (uint256 i = 0; i < percent.length; i++) {
            Percent memory item = percent[i];
            uint256 currentDate = _getCurrentDay();

            if (item.edate == 0) {
                if (currentDate < ll.endDay) {
                    uint256 d = currentDate.sub(ll.startDay).sub(item.date);
                    pr += item.amount.mul(d);
                    di += d;
                } else {
                    uint256 d = ll.endDay.sub(item.date);
                    pr += item.amount.mul(d);
                    di += d;
                }
            } else {
                if (currentDate <= item.edate) {
                    if (ll.endDay >= currentDate) {
                        uint256 d = currentDate.sub(item.date);
                        pr += item.amount.mul(d);
                        di += d;
                    }
                    if (ll.endDay >= item.date && ll.endDay < item.edate) {
                        uint256 d = ll.endDay.sub(item.date);
                        pr += item.amount.mul(d);
                        di += d;
                    }
                } else {
                    if (ll.endDay >= item.edate) {
                        uint256 d = item.edate.sub(item.date);
                        pr += item.amount.mul(d);
                        di += d;
                    } else {
                        uint256 d = ll.endDay.sub(item.date);
                        pr += item.amount.mul(d);
                        di += d;
                    }
                }
            }
        }

        return (pr, di);
    }

    function withdrawLend(uint256 index) external calculation(index) {
        (uint256 pr, uint256 di) = _calculateEarn(index);
        require(lenders[index].status == STATUS.ACTIVE, "Lend is completed");

        uint256 date = _getCurrentDay();
        require(date > lenders[index].endDay, "Lend not finished");
        uint256 p = pr.mul(PRECISION).div(di).div(PERCENT_DENOMINATOR);
        uint256 y = (lenders[index].endDay.sub(lenders[index].startDay))
            .mul(PRECISION)
            .div(YEAR);
        uint256 l = lenders[index].amount.mul(p).mul(y).div(
            PRECISION.mul(PRECISION)
        );
        uint256 amount = lenders[index].amount.add(l);
        require(
            token.transfer(address(lenders[index].user), amount),
            "No balance"
        );
        lenders[index].status = STATUS.COMPLETED;
        WITHDRAW = WITHDRAW.add(amount);

        emit Withdraw(address(lenders[index].user), amount, date);
    }
}

// File: IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// File: Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "./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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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: SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}