// File: @openzeppelin/contracts/access/Ownable.sol



// 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);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/Pausable.sol



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

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// File: contracts/Contributions.sol



// SPDX-License-Identifier: PHUNKY

/******** Contributions.sol *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░▓▓▓▓░░░░░░▓▓▓▓░░░░░░ *
* ░░░░░▒▒██░░░░░░▒▒██░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░████░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░██░░░░░░░░ *
* ░░░░░░░░░██████░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░ *
****************************/

pragma solidity 0.8.20;

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

import "./interfaces/IPoints.sol";

contract Contributions is Ownable, Pausable {

    // Beneficiary address
    address payable public beneficiary;
    // Address of the Points contract
    address public pointsAddress;
    // State variable to store total contributions
    uint256 public totalContributions;

    // Mapping to keep track of contributions per address
    mapping(address => uint256) public contributions;

    // Event to be emitted on contribution
    event ContributionReceived(address indexed contributor, uint256 amount);
    // Event to be emitted when beneficiary is changed
    event BeneficiaryChanged(address indexed newBeneficiary);

    // Constructor to set the initial owner and beneficiary
    constructor(
        address payable _beneficiary,
        address _pointsAddress
    ) Ownable(msg.sender) {
        beneficiary = _beneficiary;
        pointsAddress = _pointsAddress;
    }

    // Function to allow withdrawal of all funds to the beneficiary
    function withdrawAllToBeneficiary() public whenNotPaused {
        uint256 amount = address(this).balance;
        require(amount > 0, "No funds to withdraw");

        // Reset total contributions since the entire balance is being withdrawn
        totalContributions = 0;

        // Transfer all funds to the beneficiary
        (bool sent, ) = beneficiary.call{value: amount}("");
        require(sent, "Failed to send Ether");
    }

    // Function for the owner to change the beneficiary address
    function setBeneficiary(address payable _newBeneficiary) public onlyOwner {
        beneficiary = _newBeneficiary;
        emit BeneficiaryChanged(_newBeneficiary);
    }

    function _addPoints(address phunk, uint256 amount) internal {
        IPoints pointsContract = IPoints(pointsAddress);
        pointsContract.addPoints(phunk, amount);
    }

    // The receive function that gets called when the contract receives Ether
    receive() external payable whenNotPaused {
        require(msg.value > 0, "Contribution must be more than 0");

        // Update total contributions and individual contributions
        totalContributions += msg.value;
        contributions[msg.sender] += msg.value;

        // The minimum ETH amount required to earn points
        uint256 minEthForPoints = 0.0001 ether;

        // Check if the sent amount is at least the minimum required for points
        if (msg.value >= minEthForPoints) {
            // One point for every 0.0001 ETH sent
            uint256 points = (msg.value * 10000) / (1 ether);
            _addPoints(msg.sender, points);
        }

        // Emit the event
        emit ContributionReceived(msg.sender, msg.value);
    }
}

// File: contracts/interfaces/IPoints.sol



// SPDX-License-Identifier: PHUNKY
pragma solidity 0.8.20;

interface IPoints {
    function addPoints(address user, uint256 amount) external;
}