// SPDX-License-Identifier: MIT
pragma solidity ^0.8.29;

// interfaces
import {ITextResolver} from "@ensdomains/ens-contracts/resolvers/profiles/ITextResolver.sol";

/// @title TextResolverMod
/// @notice Stores and retrieves arbitrary text records (key-value strings) for ENS nodes with versioning support
/// @dev Implements ENS ITextResolver storage; records are keyed by (version, node, key) for atomic clearing
library TextResolverMod {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STORAGE                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // keccak256(abi.encode(uint256(keccak256("ens.domains.text.resolver.storage")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 constant STORAGE_SLOT =
        0xccd57d47affdb87d4363b03aa46f3e8c1b9394057f472ce512f3a1ec1c667400;

    /// @notice Storage layout with versioned text records: version => node => key => value
    struct Layout {
        mapping(uint64 => mapping(bytes32 => mapping(string => string))) versionable_texts;
    }

    /// @notice Returns the storage layout for this module
    function getStorage() internal pure returns (Layout storage $) {
        assembly {
            $.slot := STORAGE_SLOT
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         FUNCTIONS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @notice Sets the text data associated with an ENS node and key
    /// @param node The node to update
    /// @param key The key to set
    /// @param value The text data value to set
    function setText(
        Layout storage $,
        uint64 version,
        bytes32 node,
        string calldata key,
        string calldata value
    ) internal {
        $.versionable_texts[version][node][key] = value;
        emit ITextResolver.TextChanged(node, key, key, value);
    }

    /// @notice Returns the text data associated with an ENS node and key
    /// @param node The ENS node to query
    /// @param key The text data key to query
    /// @return The associated text data
    function text(
        Layout storage $,
        uint64 version,
        bytes32 node,
        string calldata key
    ) internal view returns (string memory) {
        return $.versionable_texts[version][node][key];
    }
}