// File: TheAlyssaStevensExhibit.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./libraries/DiamondCloneMinimalLib.sol";

// Contract Author: https://juicelabs.io 

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error FunctionDoesNotExist();

contract TheAlyssaStevensExhibit {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor(address sawAddress, address[] memory facetAddresses) {
        // set the owner
        DiamondCloneMinimalLib.accessControlStorage()._owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);

        // First facet should be the diamondFacet
        (, bytes memory err) = facetAddresses[0].delegatecall(
            abi.encodeWithSelector(
                0xf44a9d52, // initializeDiamondClone Selector
                sawAddress,
                facetAddresses
            )
        );
        if (err.length > 0) {
            revert(string(err));
        }
    }

    // Find facet for function that is called and execute the
    // function if a facet is found and return any value.
    fallback() external payable {
        // retrieve the facet address
        address facet = DiamondCloneMinimalLib._getFacetAddressForCall();

        // check if the facet address exists on the saw AND is included in our local cut
        if (facet == address(0)) revert FunctionDoesNotExist();

        // Execute external function from facet using delegatecall and return any value.
        assembly {
            // copy function selector and any arguments
            calldatacopy(0, 0, calldatasize())
            // execute function call using the facet
            let result := delegatecall(gas(), facet, 0, calldatasize(), 0, 0)
            // get any return value
            returndatacopy(0, 0, returndatasize())
            // return any return value or error back to the caller
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    receive() external payable {}
}

// File: libraries/DiamondCloneMinimalLib.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

error FailedToFetchFacet();

// minimal inline subset of the full DiamondCloneLib to reduce deployment gas costs
library DiamondCloneMinimalLib {
    bytes32 constant DIAMOND_CLONE_STORAGE_POSITION =
        keccak256("diamond.standard.diamond.clone.storage");
    bytes32 constant ACCESS_CONTROL_STORAGE_POSITION =
        keccak256("Access.Control.library.storage");

    struct DiamondCloneStorage {
        // address of the diamond saw contract
        address diamondSawAddress;
        // mapping to all the facets this diamond implements.
        mapping(address => bool) facetAddresses;
        // gas cache
        mapping(bytes4 => address) selectorGasCache;
    }

    struct AccessControlStorage {
        address _owner;
    }

    function diamondCloneStorage()
        internal
        pure
        returns (DiamondCloneStorage storage s)
    {
        bytes32 position = DIAMOND_CLONE_STORAGE_POSITION;
        assembly {
            s.slot := position
        }
    }

    // calls externally to the saw to find the appropriate facet to delegate to
    function _getFacetAddressForCall() internal view returns (address addr) {
        DiamondCloneStorage storage s = diamondCloneStorage();

        addr = s.selectorGasCache[msg.sig];
        if (addr != address(0)) {
            return addr;
        }

        (bool success, bytes memory res) = s.diamondSawAddress.staticcall(
            abi.encodeWithSelector(0x14bc7560, msg.sig) // facetAddressForSelector
        );

        if (!success) revert FailedToFetchFacet();

        assembly {
            addr := mload(add(res, 32))
        }

        return s.facetAddresses[addr] ? addr : address(0);
    }

    function accessControlStorage()
        internal
        pure
        returns (AccessControlStorage storage s)
    {
        bytes32 position = ACCESS_CONTROL_STORAGE_POSITION;
        assembly {
            s.slot := position
        }
    }
}