// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "/e2XUsers1.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract TCPointContract is Ownable {
    e2XUsernames public userDataContract;
    IERC20 public e2xToken;
    uint256 public pointsPerToken;
    address public tcPointBurntAccount;

    struct TCPointBalance {
        uint128 balance; // Represents TCPoints balance in multiples of 100
    }

    // Decimal scaling factor
    uint8 private constant DECIMALS = 18;

    modifier onlyAdminOrAuthorizedContract() {
        require(tcPointsAdmins[msg.sender] || authorizedContracts[msg.sender] || msg.sender == owner(), "Not authorized");
        _;
    }

    modifier deductTCPCharges(address _fromUser) {
        // Deduct 1 TCPoint from sender and send it to admin
        tcBalance[_fromUser].balance -= 1;
        tcBalance[owner()].balance += 1;

        emit TCPointDeducted(_fromUser, owner(), 1);

        _; // Continue with the actual function execution
    }

    mapping(address => TCPointBalance) public tcBalance;
    mapping(address => uint256) public totalTCBalance;
    mapping(address => bool) public tcPointsAdmins;
    mapping(address => bool) public authorizedContracts;

    event PointsRatioUpdated(uint256 newPointsPerToken);
    event TCPUpdated(address user, uint256 amount, bool added);
    event AdminAdded(address indexed admin);
    event AdminRemoved(address indexed admin);
    event ContractAuthorized(address indexed contractAddress);
    event ContractUnauthorized(address indexed contractAddress);
    event TCPointDeducted(address indexed from, address indexed to, uint256 amount);

    constructor(address _userDataContract, address _e2xToken) {
        userDataContract = e2XUsernames(_userDataContract);
        e2xToken = IERC20(_e2xToken);
        pointsPerToken = 100; // 100 TCP per E2X token initially
        tcPointsAdmins[msg.sender] = true; // Set contract deployer as admin by default
    }

    function setPointsPerToken(uint256 _newPointsPerToken) external onlyOwner {
        pointsPerToken = _newPointsPerToken;
        emit PointsRatioUpdated(_newPointsPerToken);
    }

    function addAdmin(address _admin) external onlyOwner {
        require(_admin != address(0), "Invalid admin address");
        tcPointsAdmins[_admin] = true;
        emit AdminAdded(_admin);
    }

    function removeAdmin(address _admin) external onlyOwner {
        require(tcPointsAdmins[_admin], "Address is not an admin");
        tcPointsAdmins[_admin] = false;
        emit AdminRemoved(_admin);
    }

    function authorizeContract(address _contractAddress) external onlyOwner {
        require(_contractAddress != address(0), "Invalid contract address");
        authorizedContracts[_contractAddress] = true;
        emit ContractAuthorized(_contractAddress);
    }

    function unauthorizeContract(address _contractAddress) external onlyOwner {
        require(authorizedContracts[_contractAddress], "Contract is not authorized");
        authorizedContracts[_contractAddress] = false;
        emit ContractUnauthorized(_contractAddress);
    }

    function transferE2XToken(uint256 _amount) external {
        require(_amount > 0, "Amount must be greater than 0");
        require(e2xToken.transferFrom(msg.sender, address(this), _amount), "E2X token transfer failed");

        address userAddress = msg.sender;
        // Calculate the number of TCPoints to mint based on the transferred E2X tokens
        uint256 tcPointsToMint = fraction(_amount, 1 ether); // 1 ether represents 1 E2X token

        // Mint TCPoints to the user
        tcBalance[userAddress].balance += uint128(tcPointsToMint);
        totalTCBalance[userAddress] += tcPointsToMint;

        emit TCPUpdated(userAddress, tcPointsToMint, true);
    }

    function transferTCP(address _toUser, uint256 _amount) external deductTCPCharges(msg.sender) {
        address senderAddress = msg.sender;

        uint128 senderBalance = tcBalance[senderAddress].balance;
        uint128 amount = uint128(_amount);

        // Convert balances and amount to decimal system
        uint256 senderBalanceDecimal = uint256(senderBalance) * (10**DECIMALS);
        uint256 amountDecimal = uint256(amount) * (10**DECIMALS);

        require(senderBalanceDecimal >= amountDecimal, "Insufficient TCP balance");

        // Perform the transfer in decimal system
        uint256 newSenderBalanceDecimal = senderBalanceDecimal - amountDecimal;
        uint256 newRecipientBalanceDecimal = uint256(tcBalance[_toUser].balance) * (10**DECIMALS) + amountDecimal;

        // Update balances in fixed-point arithmetic
        tcBalance[senderAddress].balance = uint128(newSenderBalanceDecimal / (10**DECIMALS));
        tcBalance[_toUser].balance = uint128(newRecipientBalanceDecimal / (10**DECIMALS));

        emit TCPointDeducted(senderAddress, _toUser, _amount);
    }

    function transferTCPBetweenMembers(string calldata _fromUser, string calldata _toUser, uint256 _amount) external deductTCPCharges(msg.sender) {
        // Get the sender's address
        address senderAddress = msg.sender;

        // Get the addresses associated with the provided e2xdata usernames
        address fromUserAddress = userDataContract.getAddressByUser(_fromUser);
        address toUserAddress = userDataContract.getAddressByUser(_toUser);

        // Ensure that the sender is the owner of the e2xdata address (_fromUser)
        require(fromUserAddress == senderAddress, "Sender is not the owner of the e2xdata address");

        // Check if the e2xdata addresses exist
        require(fromUserAddress != address(0) && toUserAddress != address(0), "Invalid e2xdata addresses");

        uint128 fromUserBalance = tcBalance[fromUserAddress].balance;
        uint128 amount = uint128(_amount);

        // Convert balances and amount to decimal system
        uint256 fromUserBalanceDecimal = uint256(fromUserBalance) * (10**DECIMALS);
        uint256 amountDecimal = uint256(amount) * (10**DECIMALS);

        require(fromUserBalanceDecimal >= amountDecimal, "Insufficient TCP balance");

        // Deduct 1 TCPoint from the sender and transfer it to the admin
        uint256 newSenderBalanceDecimal = fromUserBalanceDecimal - amountDecimal;
        uint256 newRecipientBalanceDecimal = uint256(tcBalance[toUserAddress].balance) * (10**DECIMALS) + amountDecimal;

        // Update balances in fixed-point arithmetic
        tcBalance[fromUserAddress].balance = uint128(newSenderBalanceDecimal / (10**DECIMALS));
        tcBalance[toUserAddress].balance = uint128(newRecipientBalanceDecimal / (10**DECIMALS));

        // Emit an event to log the TCP transfer
        emit TCPointDeducted(fromUserAddress, toUserAddress, _amount);
    }

    // Rest of the contract functions...

    function fraction(uint256 numerator, uint256 denominator) internal pure returns (uint256) {
        require(denominator > 0, 'TCPointContract::fraction: division by zero');
        if (numerator == 0) return 0;

        uint256 result = (numerator * (1 ether)) / denominator;
        require(result <= type(uint224).max, 'TCPointContract::fraction: overflow');
        return result;
    }
}