// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;

contract AGRO { // Struct to represent a farmer struct Farmer { uint256 id; string name; address farmerAddress; uint256 temperature; uint256 humidity; string pictureHash; bool loanCollateralized; }

mapping(uint256 => Farmer) public farmers;
uint256 public farmersCount;

// Event triggered when a new farmer is registered
event FarmerRegistered(uint256 id, string name, address farmerAddress);

// Function to register a new farmer
function registerFarmer(string memory _name) public {
    farmersCount++;
    farmers[farmersCount] = Farmer(
        farmersCount,
        _name,
        msg.sender,
        0,
        0,
        "",
        false
    );
    emit FarmerRegistered(farmersCount, _name, msg.sender);
}

// Function to update farm data (temperature, humidity, and picture)
function updateFarmData(uint256 _id, uint256 _temperature, uint256 _humidity, string memory _pictureHash) public {
    require(_id <= farmersCount, "Invalid farmer ID");
    Farmer storage farmer = farmers[_id];
    farmer.temperature = _temperature;
    farmer.humidity = _humidity;
    farmer.pictureHash = _pictureHash;
}

// Function to collateralize a loan
function collateralizeLoan(uint256 _id) public {
    require(_id <= farmersCount, "Invalid farmer ID");
    Farmer storage farmer = farmers[_id];
    require(!farmer.loanCollateralized, "Loan already collateralized");
    farmer.loanCollateralized = true;
}

// Function to buy a loan collateralized by a farmer
function buyLoanCollateral(uint256 _id) public payable {
    require(_id <= farmersCount, "Invalid farmer ID");
    Farmer storage farmer = farmers[_id];
    require(farmer.loanCollateralized, "Loan not collateralized");
    // Process the loan purchase and transfer funds to the farmer
}

}