// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../proxy/utils/Initializable.sol";

/**
 * @title MigratableMockV1
 * @dev This contract is a mock to test initializable functionality through migrations
 */
contract MigratableMockV1 is Initializable {
    uint256 public x;

    function initialize(uint256 value) public payable initializer {
        x = value;
    }
}

/**
 * @title MigratableMockV2
 * @dev This contract is a mock to test migratable functionality with params
 */
contract MigratableMockV2 is MigratableMockV1 {
    bool internal _migratedV2;
    uint256 public y;

    function migrate(uint256 value, uint256 anotherValue) public payable {
        require(!_migratedV2);
        x = value;
        y = anotherValue;
        _migratedV2 = true;
    }
}

/**
 * @title MigratableMockV3
 * @dev This contract is a mock to test migratable functionality without params
 */
contract MigratableMockV3 is MigratableMockV2 {
    bool internal _migratedV3;

    function migrate() public payable {
        require(!_migratedV3);
        uint256 oldX = x;
        x = y;
        y = oldX;
        _migratedV3 = true;
    }
}