// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import {Script} from "forge-std/Script.sol";
import {console} from "forge-std/console.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";

/**
 * @title Standard USDT Token
 * @notice ERC20 token with pausable and ownable features
 * @dev Can be used as native USDT or wrapped USDT depending on deployment strategy
 */
contract StandardUSDT is ERC20, Ownable, Pausable {
    uint8 private constant DECIMALS = 6; // USDT standard decimals
    
    constructor(
        address initialOwner,
        uint256 initialSupply
    ) ERC20("Tether USD", "USDT") {
        _transferOwnership(initialOwner);
        if (initialSupply > 0) {
            _mint(initialOwner, initialSupply);
        }
    }
    
    function decimals() public pure override returns (uint8) {
        return DECIMALS;
    }
    
    /**
     * @notice Mint new tokens (only owner)
     * @param to Address to mint to
     * @param amount Amount to mint
     */
    function mint(address to, uint256 amount) external onlyOwner {
        _mint(to, amount);
    }
    
    /**
     * @notice Burn tokens (only owner)
     * @param from Address to burn from
     * @param amount Amount to burn
     */
    function burn(address from, uint256 amount) external onlyOwner {
        _burn(from, amount);
    }
    
    /**
     * @notice Pause token transfers (only owner)
     */
    function pause() external onlyOwner {
        _pause();
    }
    
    /**
     * @notice Unpause token transfers (only owner)
     */
    function unpause() external onlyOwner {
        _unpause();
    }
    
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal override whenNotPaused {
        super._beforeTokenTransfer(from, to, amount);
    }
}

/**
 * @title DeployUSDT
 * @notice Deployment script for USDT token
 */
contract DeployUSDT is Script {
    function run() external {
        address deployer = msg.sender;
        address owner = vm.envOr("USDT_OWNER", deployer);
        uint256 initialSupply = vm.envOr("USDT_INITIAL_SUPPLY", uint256(0));
        
        console.log("Deploying USDT Token...");
        console.log("Deployer:", vm.toString(deployer));
        console.log("Owner:", vm.toString(owner));
        console.log("Initial Supply:", initialSupply);
        
        vm.startBroadcast();
        
        StandardUSDT usdt = new StandardUSDT(owner, initialSupply);
        
        vm.stopBroadcast();
        
        console.log("USDT Token deployed at:", vm.toString(address(usdt)));
        console.log("Name:", usdt.name());
        console.log("Symbol:", usdt.symbol());
        console.log("Decimals:", usdt.decimals());
        console.log("Total Supply:", usdt.totalSupply());
    }
}