// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract EdgeSwarm is ERC20 {
    address public owner;

    // This stores the number of tasks completed by each wallet.
    // Your Android App uses this for the raw integer balance.
    mapping(address => uint256) public ubiEarned;

    struct WorkTask {
        uint256 taskId;
        int256 predictionScore; // The confidence from your LoRA logic
        address worker;
        uint256 timestamp;
        string fileHash;        // <-- ADDED: Stores the JSON fingerprint on-chain
    }

    // Maps Task ID to the result submitted by the phone
    mapping(uint256 => WorkTask) public ledger;

    // <-- ADDED string fileHash: This allows the Dashboard to generate the URL
    event WorkVerified(address indexed worker, uint256 taskId, int256 score, string fileHash);

    constructor() ERC20("Swarm Token", "SWM") {
        owner = msg.sender;
    }

    /**
     * @dev This is the function your Pixel 10 calls.
     * <-- ADDED string memory _fileHash to the required parameters
     */
    function submitWork(uint256 _taskId, int256 _score, string memory _fileHash) public {
        require(ledger[_taskId].worker == address(0), "Task already completed");

        // 1. Record the "Real Work" in the ledger
        ledger[_taskId] = WorkTask({
            taskId: _taskId,
            predictionScore: _score,
            worker: msg.sender,
            timestamp: block.timestamp,
            fileHash: _fileHash // Save the hash to the ledger
        });

        // 2. INCREMENT THE COUNTER: This ensures your app sees the new balance.
        ubiEarned[msg.sender] += 1;

        // 3. Reward the device with 1 full ERC20 token (18 decimals)
        _mint(msg.sender, 1 * 10**18);

        // 4. Emit the event with the hash so the Dashboard can read it
        emit WorkVerified(msg.sender, _taskId, _score, _fileHash);
    }
}