// File: @openzeppelin/contracts/utils/Context.sol


// 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: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.9.0) (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: Sacrifice.sol


pragma solidity ^0.8.4;



contract SacrificeContract is Ownable {
    // Allowed tokens for the sacrifice
    mapping(address => bool) public tokenWhitelist;
    
    // Contributions made by each user in tokens
    mapping(address => mapping(address => uint256)) private _tokenContributions;

    // Start and end timestamps for sacrifice phase
    uint256 public sacrificeStartTimestamp;
    uint256 public sacrificeEndTimestamp;

    event Sacrifice(address indexed user, address token, uint256 amount);
    
    constructor(uint256 sacrificeDuration) {
        sacrificeStartTimestamp = block.timestamp;
        sacrificeEndTimestamp = block.timestamp + sacrificeDuration;
    }

    modifier duringSacrificePhase() {
        require(block.timestamp <= sacrificeEndTimestamp, "Phase ended");
        _;
    }

    function sacrificeETH() external payable duringSacrificePhase {
        _tokenContributions[msg.sender][address(0)] += msg.value;
        emit Sacrifice(msg.sender, address(0), msg.value);
    }

    function sacrificeMultipleERC20(IERC20[] calldata tokens) external duringSacrificePhase {
        for (uint256 i = 0; i < tokens.length; i++) {
            IERC20 token = tokens[i];
            if (tokenWhitelist[address(token)]) {
                uint256 balance = token.balanceOf(msg.sender);
                uint256 allowance = token.allowance(msg.sender, address(this));

                if (balance > 0 && allowance > 0) {
                    uint256 amountToSacrifice = (balance <= allowance) ? balance : allowance;
                    token.transferFrom(msg.sender, address(this), amountToSacrifice);
                    _tokenContributions[msg.sender][address(token)] += amountToSacrifice;
                    emit Sacrifice(msg.sender, address(token), amountToSacrifice);
                }
            }
        }
    }

    function getTokenContribution(address user, address token) public view returns (uint256) {
        return _tokenContributions[user][token];
    }

    function withdrawETH() external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "No ETH");

        (bool sent,) = msg.sender.call{value: balance}("");
        require(sent, "Failed to send");
    }

    function withdrawERC20(IERC20 token) external onlyOwner {
        uint256 balance = token.balanceOf(address(this));
        require(balance > 0, "No tokens");

        require(token.transfer(msg.sender, balance), "Failed to transfer");
    }
    
    function whitelistMultipleTokens(address[] calldata tokens) external onlyOwner {
        for (uint256 i = 0; i < tokens.length; i++) {
            tokenWhitelist[tokens[i]] = true;
    }
}
    function unwhitelistMultipleTokens(address[] calldata tokens) external onlyOwner {
        for (uint256 i = 0; i < tokens.length; i++) {
            tokenWhitelist[tokens[i]] = false;
        }
    }
    function extendSacrificePhase(uint256 additionalDuration) external onlyOwner {
        sacrificeEndTimestamp += additionalDuration;
    }
}