// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";
import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol";
import { ILayerZeroEndpointV2, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";

import { IReceiveUlnE2 } from "../interfaces/IReceiveUlnE2.sol";
import { ReceiveUlnBase } from "../ReceiveUlnBase.sol";
import { ReceiveLibBaseE2 } from "../../ReceiveLibBaseE2.sol";
import { UlnConfig } from "../UlnBase.sol";

/// @dev This is a gluing contract. It simply parses the requests and forward to the super.impl() accordingly.
/// @dev In this case, it combines the logic of ReceiveUlnBase and ReceiveLibBaseE2
contract ReceiveUln302 is IReceiveUlnE2, ReceiveUlnBase, ReceiveLibBaseE2 {
    using PacketV1Codec for bytes;

    /// @dev CONFIG_TYPE_ULN=2 here to align with SendUln302/ReceiveUln302/ReceiveUln301
    uint32 internal constant CONFIG_TYPE_ULN = 2;

    error LZ_ULN_InvalidConfigType(uint32 configType);

    constructor(address _endpoint) ReceiveLibBaseE2(_endpoint) {}

    function supportsInterface(bytes4 _interfaceId) public view override returns (bool) {
        return _interfaceId == type(IReceiveUlnE2).interfaceId || super.supportsInterface(_interfaceId);
    }

    // ============================ OnlyEndpoint ===================================

    // only the ULN config on the receive side
    function setConfig(address _oapp, SetConfigParam[] calldata _params) external override onlyEndpoint {
        for (uint256 i = 0; i < _params.length; i++) {
            SetConfigParam calldata param = _params[i];
            _assertSupportedEid(param.eid);
            if (param.configType == CONFIG_TYPE_ULN) {
                _setUlnConfig(param.eid, _oapp, abi.decode(param.config, (UlnConfig)));
            } else {
                revert LZ_ULN_InvalidConfigType(param.configType);
            }
        }
    }

    // ============================ External ===================================

    /// @dev dont need to check endpoint verifiable here to save gas, as it will reverts if not verifiable.
    function commitVerification(bytes calldata _packetHeader, bytes32 _payloadHash) external {
        _assertHeader(_packetHeader, localEid);

        // cache these values to save gas
        address receiver = _packetHeader.receiverB20();
        uint32 srcEid = _packetHeader.srcEid();

        UlnConfig memory config = getUlnConfig(receiver, srcEid);
        _verifyAndReclaimStorage(config, keccak256(_packetHeader), _payloadHash);

        Origin memory origin = Origin(srcEid, _packetHeader.sender(), _packetHeader.nonce());
        // endpoint will revert if nonce <= lazyInboundNonce
        ILayerZeroEndpointV2(endpoint).verify(origin, receiver, _payloadHash);
    }

    /// @dev for dvn to verify the payload
    function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external {
        _verify(_packetHeader, _payloadHash, _confirmations);
    }

    // ============================ View ===================================

    function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view override returns (bytes memory) {
        if (_configType == CONFIG_TYPE_ULN) {
            return abi.encode(getUlnConfig(_oapp, _eid));
        } else {
            revert LZ_ULN_InvalidConfigType(_configType);
        }
    }

    function isSupportedEid(uint32 _eid) external view override returns (bool) {
        return _isSupportedEid(_eid);
    }

    function version() external pure override returns (uint64 major, uint8 minor, uint8 endpointVersion) {
        return (3, 0, 2);
    }
}