// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

// interfaces

import {IPOAP} from "./IPOAP.sol";
import {ICrossChainEntitlement} from "src/spaces/entitlements/ICrossChainEntitlement.sol";
// libraries

// contracts

contract PoapEntitlement is ICrossChainEntitlement {
    IPOAP immutable poapContract;

    constructor(address poapContractAddress) {
        poapContract = IPOAP(poapContractAddress);
    }

    function isEntitled(
        address[] calldata users,
        bytes calldata data
    ) external view returns (bool) {
        uint256 eventId = abi.decode(data, (uint256));

        for (uint256 i = 0; i < users.length; i++) {
            if (_hasEventPoap(users[i], eventId)) {
                return true;
            }
        }
        return false;
    }

    function parameters() external pure returns (Parameter[] memory) {
        Parameter[] memory schema = new Parameter[](1);
        schema[0] = Parameter(
            "eventId",
            "uint256",
            "The ID of the event associated with the POAP token"
        );
        return schema;
    }

    // =============================================================
    //                           Internals
    // =============================================================
    function _hasEventPoap(address user, uint256 eventId) internal view returns (bool) {
        uint256 balance = poapContract.balanceOf(user);
        for (uint256 j = 0; j < balance; j++) {
            (uint256 ownedEventId, ) = poapContract.tokenDetailsOfOwnerByIndex(user, j);
            if (eventId == ownedEventId) {
                return true;
            }
        }
        return false;
    }
}