// File: Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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;
    }
}
// File: IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// File: ITokenLock.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface ITokenLock {
    function setERC20(address tokenAddress) external ;
    function unLock() external;
    function getReceiverIndex() external view returns (uint256);
}

// File: Ownable.sol



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

pragma solidity ^0.8.20;

import {Context} from "./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 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: TokenLock.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./Ownable.sol";
import "./IERC20.sol";
import "./TokenLockConst.sol";
import "./ITokenLock.sol";

contract TokenLock is Ownable, TokenLockConst, ITokenLock {

    event UnLock(address sender, address receiver, uint256 amount);

    uint8 public immutable _receiverIndex; 
    IERC20 public _erc20Token = IERC20(address(0)); 
    uint256 public _totalUnLock = 0; 
    address public immutable _multiSigWallet;

    uint256[] public _scheduleAmount = [
            1500000000000000, 0, 0,
                        0, 0, 0,
            1500000000000000, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0, 0, 0,
                        0
        ];

    constructor(uint8 receiverIndex, address walletSigAddress) Ownable(msg.sender) {
        require(walletSigAddress != address(0), "walletSigAddress is null");
        require(receiverIndex >= 0 && receiverIndex <= 6, "The scope of the receiverIndex variable is incorrect.");
        require(isSorted(SCHEDULE_TIMES), "The array is not sorted.");
        require(TokenLockConst.SCHEDULE_TIMES.length == TokenLockConst.CONST_SCHEDULE_COUNT, "The array is not sorted.");
        require(_scheduleAmount.length == TokenLockConst.CONST_SCHEDULE_COUNT, "Array is incorrect.");

        _receiverIndex = receiverIndex; 
        _multiSigWallet = walletSigAddress;
    }

    function isSorted(uint256[] memory arr) internal pure returns (bool) {
        for (uint i = 1; i < arr.length; i++) {
            if (arr[i] < arr[i - 1]) {
                return false; 
            }
        }
        return true; 
    }

    function setERC20(address tokenAddress) public virtual onlyOwner {
        require(tokenAddress != address(0), "ERC20 is null");
        require(_erc20Token == IERC20(address(0)), "It's already been assigned");
        _erc20Token = IERC20(tokenAddress); 
    }

    function unLock() public virtual {
        require(_multiSigWallet == msg.sender, "multiSigWallet is wrong");

        uint256 sum = 0;

        for (uint256 i = 0; i < TokenLockConst.SCHEDULE_TIMES.length; i++) {
            uint256 ts = TokenLockConst.SCHEDULE_TIMES[i];
            if(block.timestamp < ts) {
                break;
            } 

            uint256 balance = _scheduleAmount[i];
            if(balance > 0) {
                sum += _scheduleAmount[i];
                _scheduleAmount[i] = 0;
            }
        }

        if(sum > 0) {
            _totalUnLock += sum;
            _erc20Token.transfer(TokenLockConst.CONST_RECEIVERS[_receiverIndex], sum);
            emit UnLock(address(this), TokenLockConst.CONST_RECEIVERS[_receiverIndex], sum);
        }

    }

    function getDataUnLock() public pure returns (bytes memory) {
        return abi.encodeWithSignature("unLock()");
    }

    function getReceiver() public view returns (address) {
        return TokenLockConst.CONST_RECEIVERS[_receiverIndex];
    }

    function tokenBalance() public view returns (uint256) {
        return _erc20Token.balanceOf(address(this));
    }

    function totalLockAmount() public view returns (uint256) {
        uint256 balance = 0;
        for (uint256 i = 0; i < _scheduleAmount.length; i++) {
            balance += _scheduleAmount[i];
        }
        return balance;
    }

    function getReceiverIndex() public view virtual returns (uint256) {
        return _receiverIndex;
    }
}

// File: TokenLockConst.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract TokenLockConst {

    address[] CONST_RECEIVERS = 
        [0x99924219eA26c9A6B682D525e85283521507d791, // 0
        0x0A8325851AB45A81faCE64e20a246e466Cde98D4, // 1
        0x415445c732f37F0fB80ffc0F8bE0AaD151E7f059, // 2
        0x02F5A4119143fA542d7B22dE995e3B3011a52CB1, // 3
        0xA4c51aF2C017dD5c5d594653d3a79D1BED1E04f5, // 4
        0xAfe3c07793B40407a60f59E7Ed66bAE6c53192F5, // 5
        0xC1B3e3B052Cca74E100c18E6e164849432370393  // 6
    ];

    uint256 CONST_SCHEDULE_COUNT = 49; 
    
    uint256[] SCHEDULE_TIMES = [1, 
        1705276800, 1707955200, 1710460800, 1713139200, 1715731200, 
        1718409600, 1721001600, 1723680000, 1726358400, 1728950400, 
        1731628800, 1734220800, 1736899200, 1739577600, 1741996800, 
        1744675200, 1747267200, 1749945600, 1752537600, 1755216000, 
        1757894400, 1760486400, 1763164800, 1765756800, 1768435200, 
        1771113600, 1773532800, 1776211200, 1778803200, 1781481600, 
        1784073600, 1786752000, 1789430400, 1792022400, 1794700800, 
        1797292800, 1799971200, 1802649600, 1805068800, 1807747200, 
        1810339200, 1813017600, 1815609600, 1818288000, 1820966400, 
        1823558400, 1826236800, 1828828800];

}