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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";

/**
 * @title IMusicSubscription
 * @notice Interface for MusicSubscription contract
 */
interface IMusicSubscription {
    function recordPlay(address user, uint256 masterTokenId, uint256 duration) external;
}

/**
 * @title PlayOracleV3
 * @notice Oracle contract for recording music plays from backend
 * @dev Authorized operators can submit validated play records to MusicSubscription
 *
 * V3 Changes:
 * - Added DAO timelock support for governance
 * - Added platform operator for registering User Safes
 * - Added pause functionality for emergencies
 * - Added onlyOwnerOrDAO modifier for operator management
 */
contract PlayOracleV3 is Ownable, ReentrancyGuard {

    // MusicSubscription contract reference
    IMusicSubscription public musicSubscription;

    // Authorized operators (backend services, User Safes)
    mapping(address => bool) public operators;

    // Platform operator for registering User Safes
    address public platformOperator;

    // DAO Timelock for governance actions
    address public daoTimelock;

    // Pause state for emergencies
    bool public paused;

    // Minimum replay interval (prevent spam)
    uint256 public minReplayInterval = 30; // 30 seconds default

    // Track last play time per user per song
    mapping(address => mapping(uint256 => uint256)) public lastPlayTime;

    // Total plays recorded
    uint256 public totalPlaysRecorded;

    // ============================================
    // Events
    // ============================================
    event PlayRecorded(address indexed user, uint256 indexed masterTokenId, uint256 duration, uint256 timestamp);
    event OperatorAdded(address indexed operator);
    event OperatorRemoved(address indexed operator);
    event MusicSubscriptionUpdated(address indexed newAddress);
    event ReplayIntervalUpdated(uint256 newInterval);
    event DAOTimelockUpdated(address indexed oldTimelock, address indexed newTimelock);
    event PlatformOperatorUpdated(address indexed oldOperator, address indexed newOperator);
    event Paused(address indexed by);
    event Unpaused(address indexed by);

    // ============================================
    // Modifiers
    // ============================================
    modifier onlyOperator() {
        require(operators[msg.sender] || msg.sender == owner(), "Not an authorized operator");
        _;
    }

    modifier onlyOwnerOrDAO() {
        require(
            msg.sender == owner() || msg.sender == daoTimelock,
            "Only owner or DAO"
        );
        _;
    }

    modifier whenNotPaused() {
        require(!paused, "Oracle is paused");
        _;
    }

    constructor(address _musicSubscription) Ownable(msg.sender) {
        musicSubscription = IMusicSubscription(_musicSubscription);
        // Add deployer as initial operator
        operators[msg.sender] = true;
        emit OperatorAdded(msg.sender);
    }

    // ============================================
    // Core Functions
    // ============================================

    /**
     * @notice Record a validated play from the backend
     * @param user The address of the user who played the song
     * @param masterTokenId The master NFT token ID
     * @param duration Play duration in seconds
     */
    function recordPlay(
        address user,
        uint256 masterTokenId,
        uint256 duration
    ) external onlyOperator nonReentrant whenNotPaused {
        require(user != address(0), "Invalid user address");
        require(masterTokenId > 0, "Invalid masterTokenId");
        require(duration >= 30, "Duration too short");

        // Check replay interval
        require(
            block.timestamp >= lastPlayTime[user][masterTokenId] + minReplayInterval,
            "Replay too soon"
        );

        // Update last play time
        lastPlayTime[user][masterTokenId] = block.timestamp;
        totalPlaysRecorded++;

        // Forward to MusicSubscription
        musicSubscription.recordPlay(user, masterTokenId, duration);

        emit PlayRecorded(user, masterTokenId, duration, block.timestamp);
    }

    /**
     * @notice Batch record multiple plays (gas efficient for high volume)
     * @param users Array of user addresses
     * @param masterTokenIds Array of master token IDs
     * @param durations Array of play durations
     */
    function batchRecordPlays(
        address[] calldata users,
        uint256[] calldata masterTokenIds,
        uint256[] calldata durations
    ) external onlyOperator nonReentrant whenNotPaused {
        require(users.length == masterTokenIds.length && users.length == durations.length, "Array length mismatch");
        require(users.length <= 50, "Batch too large");

        for (uint256 i = 0; i < users.length; i++) {
            address user = users[i];
            uint256 masterTokenId = masterTokenIds[i];
            uint256 duration = durations[i];

            if (user == address(0) || masterTokenId == 0 || duration < 30) {
                continue; // Skip invalid entries
            }

            if (block.timestamp < lastPlayTime[user][masterTokenId] + minReplayInterval) {
                continue; // Skip if replay too soon
            }

            lastPlayTime[user][masterTokenId] = block.timestamp;
            totalPlaysRecorded++;

            musicSubscription.recordPlay(user, masterTokenId, duration);

            emit PlayRecorded(user, masterTokenId, duration, block.timestamp);
        }
    }

    // ============================================
    // View Functions
    // ============================================

    /**
     * @notice Check if a user can play a song (replay interval passed)
     */
    function canPlay(address user, uint256 masterTokenId) external view returns (bool) {
        return block.timestamp >= lastPlayTime[user][masterTokenId] + minReplayInterval;
    }

    /**
     * @notice Get last play timestamp for a user and song
     */
    function getLastPlayTime(address user, uint256 masterTokenId) external view returns (uint256) {
        return lastPlayTime[user][masterTokenId];
    }

    // ============================================
    // Operator Management (DAO Governed)
    // ============================================

    /**
     * @notice Add an operator (owner or DAO)
     * @param operator Address to add as operator
     */
    function addOperator(address operator) external onlyOwnerOrDAO {
        require(operator != address(0), "Invalid operator");
        require(!operators[operator], "Already an operator");
        operators[operator] = true;
        emit OperatorAdded(operator);
    }

    /**
     * @notice Remove an operator (owner or DAO)
     * @param operator Address to remove
     */
    function removeOperator(address operator) external onlyOwnerOrDAO {
        require(operators[operator], "Not an operator");
        operators[operator] = false;
        emit OperatorRemoved(operator);
    }

    /**
     * @notice Register a User Safe as an operator (for delegated execution)
     * @dev Called by platform operator when user creates their Safe
     * @param userSafe The User Safe address to authorize
     */
    function registerUserSafeAsOperator(address userSafe) external {
        require(msg.sender == platformOperator, "Only platform operator");
        require(userSafe != address(0), "Invalid Safe address");
        operators[userSafe] = true;
        emit OperatorAdded(userSafe);
    }

    // ============================================
    // Admin Functions
    // ============================================

    /**
     * @notice Set DAO timelock address for future governance
     * @param _daoTimelock Address of the DAO timelock contract
     */
    function setDAOTimelock(address _daoTimelock) external onlyOwner {
        address oldTimelock = daoTimelock;
        daoTimelock = _daoTimelock;
        emit DAOTimelockUpdated(oldTimelock, _daoTimelock);
    }

    /**
     * @notice Set platform operator address
     * @param _platformOperator Address of platform operator
     */
    function setPlatformOperator(address _platformOperator) external onlyOwner {
        address oldOperator = platformOperator;
        platformOperator = _platformOperator;
        emit PlatformOperatorUpdated(oldOperator, _platformOperator);
    }

    /**
     * @notice Update MusicSubscription contract address
     * @param _musicSubscription New MusicSubscription address
     */
    function setMusicSubscription(address _musicSubscription) external onlyOwner {
        require(_musicSubscription != address(0), "Invalid address");
        musicSubscription = IMusicSubscription(_musicSubscription);
        emit MusicSubscriptionUpdated(_musicSubscription);
    }

    /**
     * @notice Set minimum replay interval
     * @param _interval New interval in seconds (10 to 3600)
     */
    function setMinReplayInterval(uint256 _interval) external onlyOwner {
        require(_interval >= 10 && _interval <= 3600, "Interval out of range");
        minReplayInterval = _interval;
        emit ReplayIntervalUpdated(_interval);
    }

    /**
     * @notice Pause oracle operations (emergency only)
     */
    function pause() external onlyOwnerOrDAO {
        paused = true;
        emit Paused(msg.sender);
    }

    /**
     * @notice Unpause oracle operations
     */
    function unpause() external onlyOwnerOrDAO {
        paused = false;
        emit Unpaused(msg.sender);
    }
}

// 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 v5.0.0) (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 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 v5.0.0) (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;
    }
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "forge-std/=lib/forge-std/src/",
    "ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "hardhat/=node_modules/hardhat/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "prague",
  "viaIR": true
}

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000000000000000000000000cb11282e5797e036c98d321b276cb162cde845e5

-----Decoded View---------------
Arg [0] : _musicSubscription (address): 0xCB11282E5797E036C98D321b276Cb162cde845E5

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000cb11282e5797e036c98d321b276cb162cde845e5