// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _setOwner(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

interface iDK {
    function balanceGenesis(address owner) external view returns(uint256);
    function balanceBaby(address owner) external view returns(uint256);
}

contract CWaste is ERC20, Ownable {
    iDK public DK;

    uint256 public genesisRate = 50 ether;
    uint256 public babyRate = 10 ether;

    uint256 public startTimestamp;
    bool claimingPaused = true;

    mapping(address => uint256) public rewards;
    mapping(address => uint256) public lastUpdate;
    mapping(address => bool) public allowedAddresses;

    constructor() ERC20("ColorWaste", "ColorWaste") {
        startTimestamp =  block.timestamp;
    }

    function updateGenesisRate(uint256 _rate) public onlyOwner {
        genesisRate = _rate;
    }

    function updateBabyRate(uint256 _rate) public onlyOwner {
        babyRate = _rate;
    }

    function updateBalance(address from, address to) external {
        require(allowedAddresses[msg.sender], "Address does not have permission to updateBalance");

        if (from != address(0)) {
            rewards[from] += getPendingReward(from);
            lastUpdate[from] = block.timestamp;
        }

        if (to != address(0)) {
            rewards[to] += getPendingReward(to);
            lastUpdate[to] = block.timestamp;
        }
    }
    
    function claimBalance() external {
        require(!claimingPaused, "Claiming balance has been paused!"); 

        _mint(msg.sender, rewards[msg.sender] + getPendingReward(msg.sender));

        rewards[msg.sender] = 0;
        lastUpdate[msg.sender] = block.timestamp;
    }

    function burn(address user, uint256 amount) external {
        require(allowedAddresses[msg.sender], "Address does not have permission to burn");
        _burn(user, amount);
    }

    function getClaimable(address user) external view returns(uint256) {
        return rewards[user] + getPendingReward(user);
    }

    function getPendingReward(address user) internal view returns(uint256) {
        uint256 genesisCalculation =  DK.balanceGenesis(user) * genesisRate;
        uint256 babyCalculation =  DK.balanceBaby(user) * babyRate;

        return (genesisCalculation + babyCalculation) * (block.timestamp - (lastUpdate[user] >= startTimestamp ? lastUpdate[user] : startTimestamp)) / 86400;
    }

    function addRewardsForLP(address user, uint256 amount) public onlyOwner {
        rewards[user] += amount;
        _mint(user, amount);
    }

    function setAllowedAddresses(address _address, bool _access) public onlyOwner {
        allowedAddresses[_address] = _access;
    }

    function toggleClaiming() public onlyOwner {
        claimingPaused = !claimingPaused;
    }

    function setDaijuInterface(address _address) public onlyOwner {
        DK = iDK(_address);
    }
}