// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "forge-std/Test.sol";
import "../../contracts/core/RecursiveLeverageKernel.sol";
import "../../contracts/core/DBISInstitutionalVault.sol";
import "../../contracts/core/FlashLoanRouter.sol";
import "../../contracts/interfaces/IVault.sol";
import "../../contracts/interfaces/IKernel.sol";

/**
 * @title AmortizationInvariantTest
 * @notice Invariant tests ensuring position never worsens
 */
contract AmortizationInvariantTest is Test {
    // Contracts would be initialized in setUp()
    // This is a template for invariant testing

    function test_AmortizationMustImprovePosition() public {
        // 1. Take initial snapshot
        // 2. Execute amortization cycle
        // 3. Verify:
        //    - Debt decreased OR
        //    - Collateral increased OR
        //    - Health factor improved
        // 4. Assert all three improved
    }

    function test_AmortizationRevertsIfHFWorsens() public {
        // Test that if HF would worsen, transaction reverts
    }

    function test_AmortizationRevertsIfDebtIncreases() public {
        // Test that if debt increases, transaction reverts
    }

    function test_AmortizationRevertsIfCollateralDecreases() public {
        // Test that if collateral decreases, transaction reverts
    }

    function invariant_HealthFactorNeverDecreases() public {
        // Foundry invariant test
        // Ensures HF never decreases after any operation
    }

    function invariant_DebtNeverIncreases() public {
        // Foundry invariant test
        // Ensures debt never increases after amortization
    }

    function invariant_CollateralNeverDecreases() public {
        // Foundry invariant test
        // Ensures collateral never decreases after amortization
    }
}