// SPDX-License-Identifier: GPL-3.0-or-later
// 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 <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@mimic-fi/helpers/contracts/math/FixedPoint.sol';
import '@mimic-fi/v3-connectors/contracts/interfaces/connext/IConnextConnector.sol';

import './BaseBridgeTask.sol';
import '../interfaces/bridge/IConnextBridger.sol';

/**
 * @title Connext bridger
 * @dev Task that extends the base bridge task to use Connext
 */
contract ConnextBridger is IConnextBridger, BaseBridgeTask {
    using FixedPoint for uint256;

    // Execution type for relayers
    bytes32 public constant override EXECUTION_TYPE = keccak256('CONNEXT_BRIDGER');

    /**
     * @dev Connext bridge config. Only used in the initializer.
     */
    struct ConnextBridgeConfig {
        BaseBridgeConfig baseBridgeConfig;
    }

    /**
     * @dev Initializes the Connext bridger
     * @param config Connext bridge config
     */
    function initialize(ConnextBridgeConfig memory config) external virtual initializer {
        __ConnextBridger_init(config);
    }

    /**
     * @dev Initializes the Connext bridger. It does call upper contracts initializers.
     * @param config Connext bridge config
     */
    function __ConnextBridger_init(ConnextBridgeConfig memory config) internal onlyInitializing {
        __BaseBridgeTask_init(config.baseBridgeConfig);
        __ConnextBridger_init_unchained(config);
    }

    /**
     * @dev Initializes the Connext bridger. It does not call upper contracts initializers.
     * @param config Connext bridge config
     */
    function __ConnextBridger_init_unchained(ConnextBridgeConfig memory config) internal onlyInitializing {
        // solhint-disable-previous-line no-empty-blocks
    }

    /**
     * @dev Execute Connext bridger
     */
    function call(address token, uint256 amount, uint256 slippage, uint256 fee)
        external
        override
        authP(authParams(token, amount, slippage, fee))
    {
        if (amount == 0) amount = getTaskAmount(token);
        _beforeConnextBridger(token, amount, slippage, fee);

        uint256 amountAfterFees = amount - fee;
        uint256 minAmountOut = amountAfterFees.mulUp(FixedPoint.ONE - slippage);
        bytes memory connectorData = abi.encodeWithSelector(
            IConnextConnector.execute.selector,
            getDestinationChain(token),
            token,
            amount,
            minAmountOut,
            recipient,
            fee
        );

        ISmartVault(smartVault).execute(connector, connectorData);
        _afterConnextBridger(token, amount, slippage, fee);
    }

    /**
     * @dev Before connext bridger hook
     */
    function _beforeConnextBridger(address token, uint256 amount, uint256 slippage, uint256 fee) internal virtual {
        _beforeBaseBridgeTask(token, amount, slippage, fee);
    }

    /**
     * @dev After connext bridger hook
     */
    function _afterConnextBridger(address token, uint256 amount, uint256 slippage, uint256 fee) internal virtual {
        _afterBaseBridgeTask(token, amount, slippage, fee);
    }
}