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/**
 *     NOTICE
 *
 *     The T-REX software is licensed under a proprietary license or the GPL v.3.
 *     If you choose to receive it under the GPL v.3 license, the following applies:
 *     T-REX is a suite of smart contracts implementing the ERC-3643 standard and
 *     developed by Tokeny to manage and transfer financial assets on EVM blockchains
 *
 *     Copyright (C) 2023, Tokeny sàrl.
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

pragma solidity 0.8.17;

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "../storage/CTRStorage.sol";
import "../interface/IClaimTopicsRegistry.sol";

contract ClaimTopicsRegistry is IClaimTopicsRegistry, OwnableUpgradeable, CTRStorage {

    function init() external initializer {
        __Ownable_init();
    }

    /**
     *  @dev See {IClaimTopicsRegistry-addClaimTopic}.
     */
    function addClaimTopic(uint256 _claimTopic) external override onlyOwner {
        uint256 length = _claimTopics.length;
        require(length < 15, "cannot require more than 15 topics");
        for (uint256 i = 0; i < length; i++) {
            require(_claimTopics[i] != _claimTopic, "claimTopic already exists");
        }
        _claimTopics.push(_claimTopic);
        emit ClaimTopicAdded(_claimTopic);
    }

    /**
     *  @dev See {IClaimTopicsRegistry-removeClaimTopic}.
     */
    function removeClaimTopic(uint256 _claimTopic) external override onlyOwner {
        uint256 length = _claimTopics.length;
        for (uint256 i = 0; i < length; i++) {
            if (_claimTopics[i] == _claimTopic) {
                _claimTopics[i] = _claimTopics[length - 1];
                _claimTopics.pop();
                emit ClaimTopicRemoved(_claimTopic);
                break;
            }
        }
    }

    /**
     *  @dev See {IClaimTopicsRegistry-getClaimTopics}.
     */
    function getClaimTopics() external view override returns (uint256[] memory) {
        return _claimTopics;
    }
}