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

import "../interfaces/IAdapter.sol";

/**
 * @title AaveAdapter
 * @notice Adapter for Aave lending protocol
 */
contract AaveAdapter is IAdapter {
    string public constant override name = "Aave V3";
    
    // Mock Aave pool (in production, use actual Aave pool)
    address public pool;

    constructor(address _pool) {
        pool = _pool;
    }

    function executeStep(bytes calldata data) external override returns (bool success, bytes memory returnData) {
        // Decode operation type and parameters
        // (uint8 operation, address asset, uint256 amount, address collateral)
        (uint8 operation, address asset, uint256 amount, address collateral) = 
            abi.decode(data, (uint8, address, uint256, address));

        if (operation == 0) {
            // Borrow
            // In production: pool.borrow(asset, amount, ...)
            success = true;
            returnData = abi.encode(amount);
        } else if (operation == 1) {
            // Repay
            // In production: pool.repay(asset, amount, ...)
            success = true;
            returnData = abi.encode(uint256(0));
        } else {
            success = false;
            returnData = "";
        }
    }

    function prepareStep(bytes calldata data) external override returns (bool prepared) {
        // Check if borrow/repay can be prepared (collateral check, etc.)
        return true;
    }

    function adapterType() external pure override returns (uint8) {
        return 0; // DEFI
    }
}