pragma solidity ^0.4.25;

import "./erc20.sol";

contract AccessToken {

    address public owner; // Trader wallet
    address public manager;
    address public accessToken;

    modifier onlyManager() {
        require(msg.sender == manager, "Only visible for tokens owners");

        _;
    }

    constructor(address _owner) public {
        manager = msg.sender;
        owner = _owner;

        accessToken = new TradToken("TRC", "Access Token");

        ERC20Interface(accessToken).transfer(manager, 1);
        ERC20Interface(accessToken).transfer(owner, 1);
    }

    function enableAccountAccess(address _account) private onlyManager {
        require(ERC20Interface(accessToken).balanceOf(_account) == 0, "Duplicated account");

        ERC20Interface(accessToken).transfer(_account, 1);
    }

    function doIHaveAccess() view public {
        require(ERC20Interface(accessToken).balanceOf(msg.sender) == 1, "You don't have access");
    }

    function disableAccountAccess(address _account) private onlyManager {
        require(_account != owner, "Owner cannot disable the account");
        require(_account != manager, "Manager cannot disable the account");

        require(ERC20Interface(accessToken).balanceOf(_account) > 0, "Disabled account");

        ERC20Interface(accessToken).transferFrom(_account, this, ERC20Interface(accessToken).balanceOf(_account));
    }

}