// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

contract NAVISToken is ERC20Burnable, Ownable {
    AggregatorV3Interface internal priceFeed; // Chainlink BTC/USD price feed
    uint256 public miningReward;

    // Events
    event TokensConverted(address indexed account, uint256 navisAmount);
    event TokensMined(address indexed account, uint256 minedAmount);
    event UserRewarded(address indexed user, uint256 amount);
    event TokensBurned(uint256 amount);

    constructor(address _priceFeed, uint256 _initialSupply, uint256 _miningReward) ERC20("NAVIS", "NAVIS") {
        priceFeed = AggregatorV3Interface(_priceFeed);
        miningReward = _miningReward;

        // Mint initial tokens to the owner
        _mint(msg.sender, _initialSupply);
    }

    // Function to get the current BTC to USD exchange rate
    function getBTCPrice() public view returns (uint256) {
        (, int256 price, , ,) = priceFeed.latestRoundData();
        require(price > 0, "Invalid price feed");
        return uint256(price);
    }

    // Function to convert BTC to NAVIS tokens (1:1 ratio)
    function convertBTCToNAVIS(uint256 btcAmount) external {
        uint256 navisAmount = btcAmount * getBTCPrice();
        _mint(msg.sender, navisAmount);
        emit TokensConverted(msg.sender, navisAmount);
    }

    // Function to mine new tokens by staking existing tokens
    function mineTokens(uint256 _amount) external {
        require(balanceOf(msg.sender) >= _amount, "Insufficient balance");
        _mint(msg.sender, miningReward);
        emit TokensMined(msg.sender, miningReward);
    }

    // Mint function to be used internally and by other contracts
    function mint(address to, uint256 amount) external onlyOwner {
        _mint(to, amount);
    }

    // Function to reward users for certain actions or achievements in The NAVIS App
    function rewardUser(address user, uint256 amount) external onlyOwner {
        // Additional logic for specific rewards in The NAVIS App
        // (e.g., achievements, activities, etc.)
        _mint(user, amount);
        emit UserRewarded(user, amount);
    }

    // Function to burn a specific amount of tokens (could be used for certain events or mechanics)
    function burnTokens(uint256 amount) external onlyOwner {
        _burn(msg.sender, amount);
        emit TokensBurned(amount);
    }

    // Additional functions and logic specific to The NAVIS App...

    // Customize and add more features based on The NAVIS App requirements...
}