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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "./interfaces/IDungeonGame.sol";
import "./interfaces/IDungeonEntry.sol";
import "./interfaces/INFTStats.sol";
import "./interfaces/IPrizePool.sol";
import "./libraries/EncounterLibrary.sol";

/// @title DungeonGame
/// @notice Core game logic for dungeon runs and encounters
contract DungeonGame is IDungeonGame, Ownable(msg.sender), ReentrancyGuard {
    // Events
    event FeesWithdrawn(address indexed owner, uint256 amount);
    event DungeonEntered(
        address indexed collection,
        uint256 indexed tokenId,
        uint256 indexed entryIndex
    );

    event CharacterSurvived(
        address indexed collection,
        uint256 indexed tokenId,
        uint256 newHp,
        uint256 xpGained
    );

    // Allow contract to receive native currency (for Pyth refunds)
    receive() external payable {}

    // Constants
    uint8 public constant ROOM_COUNT = 16;

    uint256 private constant BASE_XP = 100;
    uint256 private constant COMPLETION_BONUS = 500;

    CharacterState private emptyRoom =
        CharacterState({collection: address(0), tokenId: 0, currentHp: 0});

    // Core contract references
    address public dungeonEntry;
    address public immutable nftStats;
    address public immutable prizePool;

    uint256 public currentIndex = 0;
    uint8 public startRoom = 0;

    CharacterState[ROOM_COUNT] public rooms;

    mapping(uint64 => CharacterState) private pendingEntries;
    mapping(address => mapping(uint256 => uint256)) private characterEntryIndex;

    constructor(address _dungeonEntry, address _nftStats, address _prizePool) {
        require(_dungeonEntry != address(0), "Invalid DungeonEntry address");
        require(_nftStats != address(0), "Invalid NFTStats address");
        require(_prizePool != address(0), "Invalid PrizePool address");

        dungeonEntry = _dungeonEntry;
        nftStats = _nftStats;
        prizePool = _prizePool;
    }

    /// @notice Get the state of a specific room
    function getRoomState(
        uint256 roomNumber
    ) external view returns (CharacterState memory) {
        require(
            roomNumber >= 0 && roomNumber <= ROOM_COUNT - 1,
            "Invalid room number"
        );
        return rooms[roomNumber];
    }

    function getAllRoomStates()
        external
        view
        returns (CharacterState[ROOM_COUNT] memory)
    {
        return rooms;
    }

    function getCharacterRoomNumber(
        address collection,
        uint256 tokenId
    ) public view returns (uint8) {
        uint256 entryIndex = characterEntryIndex[collection][tokenId];
        uint8 roomNumber = uint8(
            (currentIndex - entryIndex + startRoom) % ROOM_COUNT
        );
        return roomNumber;
    }

    function getCharacterState(
        address collection,
        uint256 tokenId
    ) external view returns (CharacterState memory) {
        uint8 roomNumber = getCharacterRoomNumber(collection, tokenId);
        return rooms[roomNumber];
    }

    /// @notice Add a new character to the dungeon queue
    /// @dev Only DungeonEntry can add characters
    function enterDungeon(address collection, uint256 tokenId) external {
        require(
            msg.sender == address(dungeonEntry),
            "Only DungeonEntry can add characters"
        );

        bytes32 randomNumber = keccak256(
            abi.encodePacked(block.timestamp, block.prevrandao)
        );

        _processEntry(collection, tokenId, randomNumber);
    }

    /// @notice Process encounter
    function _processEntry(
        address collection,
        uint256 tokenId,
        bytes32 randomNumber
    ) internal {
        // Push all characters forward one room, starting from the last room
        for (uint8 i = 0; i < ROOM_COUNT; i++) {
            uint8 roomIndex = (ROOM_COUNT + startRoom - 1 - i) % ROOM_COUNT;

            CharacterState storage character = rooms[roomIndex];

            // Skip empty rooms
            if (character.collection == address(0)) {
                continue;
            }

            EncounterLibrary.Encounter memory encounter = EncounterLibrary
                .generateEncounter(
                    roomIndex + 1, // Add 1 since EncounterLibrary expects 1-based room numbers
                    uint256(randomNumber)
                );

            INFTStats.NFTStatsData memory characterStats = INFTStats(nftStats)
                .getStats(character.collection, character.tokenId);

            EncounterResult memory result = EncounterLibrary.processEncounter(
                encounter,
                characterStats
            );

            int256 newHp = int256(character.currentHp) + result.hpChange;
            bool survived = newHp > 0;

            // Calculate XP (partial XP if failed)
            uint256 xpGained = survived
                ? encounter.baseXp
                : encounter.baseXp / 2;

            // Update character stats
            if (survived) {
                emit CharacterSurvived(
                    character.collection,
                    character.tokenId,
                    uint256(newHp),
                    xpGained
                );
                character.currentHp = uint256(newHp);
                INFTStats(nftStats).awardXP(
                    character.collection,
                    character.tokenId,
                    xpGained,
                    1
                );
            }

            // Only move if they survived the encounter
            if (survived) {
                if (roomIndex == ROOM_COUNT - 1) {
                    // Character completed the dungeon
                    _handleDungeonCompletion(
                        character.collection,
                        character.tokenId
                    );
                }
            } else {
                // End the run in DungeonEntry
                IDungeonEntry(dungeonEntry).endDungeonRun(
                    character.collection,
                    character.tokenId,
                    false
                );

                // Remove dead character
                rooms[roomIndex] = CharacterState({
                    collection: address(0),
                    tokenId: 0,
                    currentHp: 0
                });
            }
        }

        INFTStats.NFTStatsData memory stats = INFTStats(nftStats).getStats(
            collection,
            tokenId
        );

        // Store the entry index for this character
        characterEntryIndex[collection][tokenId] = currentIndex;

        // Place the new character in the start room
        rooms[startRoom] = CharacterState({
            collection: collection,
            tokenId: tokenId,
            currentHp: stats.hp
        });
        emit DungeonEntered(collection, tokenId, currentIndex);

        // Increment indices for next entry
        startRoom = (startRoom + 1) % ROOM_COUNT;
        currentIndex++;
    }

    function _handleDungeonCompletion(
        address collection,
        uint256 tokenId
    ) internal {
        // Award completion bonus XP
        INFTStats(nftStats).awardXP(
            collection,
            tokenId,
            COMPLETION_BONUS,
            ROOM_COUNT
        );

        // Clear the last room
        rooms[ROOM_COUNT - 1] = emptyRoom;

        IPrizePool(prizePool).registerWinner(collection, tokenId);

        emit DungeonCompleted(collection, tokenId);
    }

    /// @notice Withdraw accumulated fees from Pyth refunds
    /// @dev Only callable by contract owner
    function withdrawFees() external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "No fees to withdraw");

        (bool success, ) = msg.sender.call{value: balance}("");
        require(success, "Withdrawal failed");

        emit FeesWithdrawn(msg.sender, balance);
    }

    function getPendingEntry(
        uint64 sequenceNumber
    ) external view returns (CharacterState memory) {
        return pendingEntries[sequenceNumber];
    }

    function setDungeonEntry(address _dungeonEntry) external onlyOwner {
        require(_dungeonEntry != address(0), "Invalid dungeon entry address");
        dungeonEntry = _dungeonEntry;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        _status = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC-721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC-721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or
     *   {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/// @title IDungeonGame
/// @notice Interface for core dungeon game mechanics and progression
interface IDungeonGame {
    /// @notice Structure for dungeon room state
    struct RoomState {
        address collection;
        uint256 tokenId;
        uint256 entryIndex;      // Used for ordering characters
        uint256 currentHp;
        uint256 currentAttack;
        uint256 currentSpeed;
        bool isOccupied;
    }

    /// @notice Structure for encounter results
    struct EncounterResult {
        int256 hpChange;
        string encounterDescription;
    }

    /// @notice Structure for character state
    struct CharacterState {
        address collection;
        uint256 tokenId;
        uint256 currentHp;
    }

    /// @notice Event emitted when an encounter is completed
    event EncounterCompleted(
        address indexed collection,
        uint256 indexed tokenId,
        uint256 roomNumber,
        uint256 xpGained,
        bool survived,
        string encounterDescription
    );
    
    /// @notice Event emitted when a dungeon run is completed
    event DungeonCompleted(
        address indexed collection,
        uint256 indexed tokenId
    );

    /// @notice Add a new character to the dungeon queue
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    function enterDungeon(address collection, uint256 tokenId) external;

    /// @notice Get the current room number for a character
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return Current room number
    function getCharacterRoomNumber(address collection, uint256 tokenId) external view returns (uint8);

    /// @notice Get the current room state for a character
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return Current room state
    function getCharacterState(address collection, uint256 tokenId) external view returns (CharacterState memory);


    /// @notice Get the state of a specific room
    /// @param roomNumber Room number to get state for
    /// @return CharacterState Memory of the room state
    function getRoomState(uint256 roomNumber) external view returns (CharacterState memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/// @title IDungeonEntry
/// @notice Interface for managing dungeon entry and run initialization
interface IDungeonEntry {
    /// @notice Structure for active dungeon run state
    struct DungeonRun {
        uint256 currentHp;
        uint256 currentRoom;
        bool isActive;
    }

    /// @notice Event emitted when a dungeon run is started
    event DungeonRunStarted(
        address indexed collection,
        uint256 indexed tokenId,
        address indexed player,
        uint256 entryFee
    );
    
    /// @notice Event emitted when a dungeon run is ended
    event DungeonRunEnded(
        address indexed collection,
        uint256 indexed tokenId,
        bool success
    );

    /// @notice Start a new dungeon run for an NFT
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    function startDungeonRun(address collection, uint256 tokenId) external payable;

    /// @notice End an active dungeon run (called by DungeonGame)
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @param success Whether the run was successful
    function endDungeonRun(address collection, uint256 tokenId, bool success) external;


    /// @notice Check if an NFT has an active dungeon run
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return bool True if NFT has an active run
    function hasActiveRun(address collection, uint256 tokenId) external view returns (bool);

    /// @notice Get the current entry fee for dungeon runs
    /// @return uint256 Current entry fee in wei
    function getEntryFee() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/// @title INFTStats
/// @notice Interface for managing individual NFT stats and progression
interface INFTStats {
    /// @notice Structure for NFT permanent stats
    struct NFTStatsData {
        uint256 hp;
        uint256 attack;
        uint256 speed;
        uint256 level;
        uint256 currentXP;
        uint256 xpToNextLevel;
        uint256 dungeonRuns;
        uint256 successfulRuns;
        uint256 roomsCleared;
        bool initialized;
    }

    /// @notice Event emitted when an NFT's stats are initialized
    event StatsInitialized(address indexed collection, uint256 indexed tokenId, uint256 hp, uint256 attack, uint256 speed);
    
    /// @notice Event emitted when an NFT's stats are boosted
    event StatsBoosted(address indexed collection, uint256 indexed tokenId, uint256 newHp, uint256 newAttack, uint256 newSpeed);
    
    /// @notice Event emitted when XP is gained
    event XPGained(address indexed collection, uint256 indexed tokenId, uint256 xpGained, uint256 newTotalXP);
    
    /// @notice Event emitted when a level up occurs
    event LevelUp(address indexed collection, uint256 indexed tokenId, uint256 newLevel);
    
    /// @notice Event emitted when a run is recorded
    event RunRecorded(address indexed collection, uint256 indexed tokenId, bool success, uint256 roomsCleared, uint256 xpGained);

    /// @notice Initialize stats for an NFT based on its collection's base stats
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    function initializeStats(address collection, uint256 tokenId) external;

    /// @notice Award XP for dungeon progress
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @param xpAmount Amount of XP to award
    /// @param roomsCleared Number of rooms cleared in this run
    function awardXP(
        address collection,
        uint256 tokenId,
        uint256 xpAmount,
        uint256 roomsCleared
    ) external;

    /// @notice Calculate XP required for next level
    /// @param currentLevel Current level of the NFT
    /// @return uint256 XP required for next level
    function getXPForNextLevel(uint256 currentLevel) external pure returns (uint256);

    /// @notice Get the stat increases for a level up
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return hpIncrease Amount HP increases
    /// @return attackIncrease Amount Attack increases
    /// @return speedIncrease Amount Speed increases
    function getLevelUpStats(
        address collection,
        uint256 tokenId
    ) external view returns (
        uint256 hpIncrease,
        uint256 attackIncrease,
        uint256 speedIncrease
    );

    /// @notice Record a dungeon run attempt
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @param success Whether the run was successful
    function recordRun(address collection, uint256 tokenId, bool success) external;

    /// @notice Get current stats for an NFT
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return NFTStatsData struct containing current stats
    function getStats(address collection, uint256 tokenId) external view returns (NFTStatsData memory);

    /// @notice Check if an NFT has been initialized
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    /// @return bool True if NFT has been initialized
    function isInitialized(address collection, uint256 tokenId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/// @title IPrizePool
/// @notice Interface for managing dungeon rewards and prize distribution
interface IPrizePool {
    /// @notice Event emitted when entry fee is deposited
    event EntryFeeDeposited(address indexed collection, uint256 indexed tokenId, uint256 amount);
    
    /// @notice Event emitted when reward is claimed
    event RewardClaimed(address indexed collection, uint256 indexed tokenId, address indexed recipient, uint256 amount);
    
    /// @notice Event emitted when prize pool parameters are updated
    event PrizePoolParametersUpdated(uint256 entryFee, uint256 winnerShare);

    /// @notice Deposit entry fee for a dungeon run
    function depositEntryFee() external payable;

    /// @notice Register a winner and immediately transfer their prize
    /// @param collection Address of the NFT collection
    /// @param tokenId Token ID of the NFT
    function registerWinner(address collection, uint256 tokenId) external;

    /// @notice Get current prize pool amount
    /// @return uint256 Current prize pool amount
    function getCurrentPrizePool() external view returns (uint256);

    /// @notice Gets the current entry fee
    /// @return uint256 Current entry fee
    function getEntryFee() external view returns (uint256);

    /// @notice Gets total entry fees collected
    /// @return uint256 Total entry fees
    function getTotalEntryFees() external view returns (uint256);

    /// @notice Gets total prizes paid out
    /// @return uint256 Total prizes paid
    function getTotalPrizesPaid() external view returns (uint256);

    /// @notice Gets current treasury balance
    /// @return uint256 Current treasury balance
    function getTreasuryBalance() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "../interfaces/IDungeonGame.sol";
import "../interfaces/INFTStats.sol";

/// @title EncounterLibrary
/// @notice Library for generating and processing dungeon encounters
library EncounterLibrary {
    // Encounter types
    enum EncounterType {
        Combat,      // Standard combat encounter
        Trap,       // Environmental hazard
        Blessing,   // Positive encounter
        Elite,      // Stronger combat encounter
        Boss        // Room 16 boss encounter
    }

    // Encounter definition
    struct Encounter {
        EncounterType encounterType;
        uint256 difficulty;       // 1-100 scale
        int256 baseHpChange;     // Base HP modification
        int256 baseAttackMod;    // Temporary attack modification
        int256 baseSpeedMod;     // Temporary speed modification
        uint256 baseXp;          // Base XP reward
        string description;       // Encounter description
    }

    // Constants for encounter generation
    uint256 private constant BASE_DIFFICULTY_PER_ROOM = 6; // ~100 difficulty by room 16
    uint256 private constant ELITE_CHANCE = 15;           // 15% chance for elite encounter
    uint256 private constant BLESSING_CHANCE = 10;        // 10% chance for blessing
    uint256 private constant TRAP_CHANCE = 20;           // 20% chance for trap
    
    // Constants for encounter effects
    uint256 private constant BASE_DAMAGE = 20;
    uint256 private constant ELITE_DAMAGE_MULTIPLIER = 2;
    uint256 private constant BOSS_DAMAGE_MULTIPLIER = 3;
    int256 private constant MAX_STAT_MODIFICATION = 50;   // Maximum temporary stat change

    /// @notice Generate an encounter for a specific room
    /// @param roomNumber Current room number (1-16)
    /// @param randomness Random number for encounter generation
    /// @return Encounter struct with encounter details
    function generateEncounter(
        uint256 roomNumber,
        uint256 randomness
    ) internal pure returns (Encounter memory) {
        require(roomNumber > 0 && roomNumber <= 16, "Invalid room number");

        // Room 16 is always a boss encounter
        if (roomNumber == 16) {
            return _generateBossEncounter();
        }

        // Use randomness to determine encounter type
        uint256 encounterRoll = randomness % 100;
        
        // Scale difficulty with room number
        uint256 difficulty = BASE_DIFFICULTY_PER_ROOM * roomNumber;
        
        // Select encounter type based on roll
        if (encounterRoll < BLESSING_CHANCE) {
            return _generateBlessing(roomNumber, difficulty);
        } else if (encounterRoll < BLESSING_CHANCE + TRAP_CHANCE) {
            return _generateTrap(roomNumber, difficulty);
        } else if (encounterRoll < BLESSING_CHANCE + TRAP_CHANCE + ELITE_CHANCE) {
            return _generateEliteEncounter(roomNumber, difficulty);
        } else {
            return _generateCombatEncounter(roomNumber, difficulty);
        }
    }

    /// @notice Process an encounter for a character
    /// @param encounter The encounter to process
    /// @param characterStats Current character stats
    /// @return IDungeonGame.EncounterResult Result of the encounter
    function processEncounter(
        Encounter memory encounter,
        INFTStats.NFTStatsData memory characterStats
    ) internal pure returns (IDungeonGame.EncounterResult memory) {
        // Calculate final HP change based on character stats
        int256 hpChange = _calculateHpChange(encounter, characterStats);

        
        return IDungeonGame.EncounterResult({
            hpChange: hpChange,
            encounterDescription: encounter.description
        });
    }

    // Internal encounter generation functions

    function _generateCombatEncounter(
        uint256 roomNumber,
        uint256 difficulty
    ) private pure returns (Encounter memory) {
        int256 damage = -int256(BASE_DAMAGE + (difficulty / 2));
        return Encounter({
            encounterType: EncounterType.Combat,
            difficulty: difficulty,
            baseHpChange: damage,
            baseAttackMod: 0,
            baseSpeedMod: 0,
            baseXp: 100 + (roomNumber * 10),
            description: "A hostile enemy appears!"
        });
    }

    function _generateEliteEncounter(
        uint256 roomNumber,
        uint256 difficulty
    ) private pure returns (Encounter memory) {
        int256 damage = -int256((BASE_DAMAGE + (difficulty / 2)) * ELITE_DAMAGE_MULTIPLIER);
        return Encounter({
            encounterType: EncounterType.Elite,
            difficulty: difficulty,
            baseHpChange: damage,
            baseAttackMod: int256(MAX_STAT_MODIFICATION / 2),
            baseSpeedMod: -int256(MAX_STAT_MODIFICATION / 4),
            baseXp: (150 + (roomNumber * 15)),
            description: "An elite enemy blocks your path!"
        });
    }

    function _generateBossEncounter() private pure returns (Encounter memory) {
        return Encounter({
            encounterType: EncounterType.Boss,
            difficulty: 100,
            baseHpChange: -int256(BASE_DAMAGE * BOSS_DAMAGE_MULTIPLIER),
            baseAttackMod: -int256(MAX_STAT_MODIFICATION),
            baseSpeedMod: -int256(MAX_STAT_MODIFICATION / 2),
            baseXp: 1000,
            description: "The dungeon boss emerges!"
        });
    }

    function _generateBlessing(
        uint256 roomNumber,
        uint256 difficulty
    ) private pure returns (Encounter memory) {
        return Encounter({
            encounterType: EncounterType.Blessing,
            difficulty: difficulty,
            baseHpChange: int256(BASE_DAMAGE),
            baseAttackMod: int256(MAX_STAT_MODIFICATION / 2),
            baseSpeedMod: int256(MAX_STAT_MODIFICATION / 2),
            baseXp: 50 + (roomNumber * 5),
            description: "You discover a magical blessing!"
        });
    }

    function _generateTrap(
        uint256 roomNumber,
        uint256 difficulty
    ) private pure returns (Encounter memory) {
        return Encounter({
            encounterType: EncounterType.Trap,
            difficulty: difficulty,
            baseHpChange: -int256(BASE_DAMAGE / 2),
            baseAttackMod: -int256(MAX_STAT_MODIFICATION / 4),
            baseSpeedMod: -int256(MAX_STAT_MODIFICATION / 4),
            baseXp: 75 + (roomNumber * 7),
            description: "You triggered a trap!"
        });
    }

    // Internal helper functions
    function _calculateHpChange(
        Encounter memory encounter,
        INFTStats.NFTStatsData memory characterStats
    ) private pure returns (int256) {
        // Base damage
        int256 hpChange = encounter.baseHpChange;

        // Modify based on character stats
        if (encounter.encounterType == EncounterType.Combat || 
            encounter.encounterType == EncounterType.Elite ||
            encounter.encounterType == EncounterType.Boss) {
            // Higher attack reduces damage taken
            uint256 attackMitigation = characterStats.attack / 10;
            // Higher speed increases chance to dodge
            uint256 speedMitigation = characterStats.speed / 20;
            
            hpChange += int256(attackMitigation + speedMitigation);
        }
        
        return hpChange;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@pythnetwork/entropy-sdk-solidity/=../node_modules/@pythnetwork/entropy-sdk-solidity/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "pyth-sdk-solidity/=lib/pyth-sdk-solidity/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IDungeonGame.CharacterState[16]","name":"","type":"tuple[16]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getCharacterRoomNumber","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getCharacterState","outputs":[{"components":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"currentHp","type":"uint256"}],"internalType":"struct IDungeonGame.CharacterState","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"sequenceNumber","type":"uint64"}],"name":"getPendingEntry","outputs":[{"components":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"currentHp","type":"uint256"}],"internalType":"struct IDungeonGame.CharacterState","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"roomNumber","type":"uint256"}],"name":"getRoomState","outputs":[{"components":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"currentHp","type":"uint256"}],"internalType":"struct IDungeonGame.CharacterState","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftStats","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"prizePool","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rooms","outputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"currentHp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_dungeonEntry","type":"address"}],"name":"setDungeonEntry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startRoom","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000cd68ef73be45b626a3a96782be4e52db2c4be9a300000000000000000000000087ec3b1f830c03a2f736429f52de34130331609c00000000000000000000000023855d7e3fd8d51bb44e3463eda898737fcc9ca8

-----Decoded View---------------
Arg [0] : _dungeonEntry (address): 0xCD68eF73be45B626A3A96782BE4e52Db2C4bE9a3
Arg [1] : _nftStats (address): 0x87ec3b1F830c03a2f736429f52De34130331609C
Arg [2] : _prizePool (address): 0x23855D7E3fd8D51BB44E3463EdA898737fCC9CA8

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000cd68ef73be45b626a3a96782be4e52db2c4be9a3
Arg [1] : 00000000000000000000000087ec3b1f830c03a2f736429f52de34130331609c
Arg [2] : 00000000000000000000000023855d7e3fd8d51bb44e3463eda898737fcc9ca8