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

import "./UniversalCCIPBridge.sol";
import "../iso4217w/interfaces/IISO4217WToken.sol";

/**
 * @title ISO4217WCCIPBridge
 * @notice Specialized bridge for ISO-4217W eMoney/CBDC tokens
 * @dev Enforces KYC compliance and reserve backing verification
 */
contract ISO4217WCCIPBridge is UniversalCCIPBridge {
    
    mapping(address => bool) public kycVerified;
    mapping(address => uint256) public kycExpiration;
    mapping(string => bool) public allowedJurisdictions;
    mapping(address => string) public userJurisdictions;
    mapping(address => uint256) public verifiedReserves;

    event KYCVerified(address indexed user, uint256 expirationTime);
    event KYCRevoked(address indexed user);
    event JurisdictionEnabled(string indexed jurisdiction);
    event ReserveVerified(address indexed token, uint256 amount);

    function bridgeISO4217W(
        address token,
        uint256 amount,
        uint64 destinationChain,
        address recipient,
        bytes calldata complianceProof
    ) external nonReentrant returns (bytes32 messageId) {
        UniversalAssetRegistry.UniversalAsset memory asset = assetRegistry.getAsset(token);
        require(asset.assetType == UniversalAssetRegistry.AssetType.ISO4217W, "Not ISO-4217W");
        require(asset.isActive, "Asset not active");
        
        require(_checkKYC(msg.sender), "KYC required");
        require(_checkKYC(recipient), "Recipient KYC required");
        
        string memory senderJurisdiction = userJurisdictions[msg.sender];
        string memory recipientJurisdiction = userJurisdictions[recipient];
        require(
            allowedJurisdictions[senderJurisdiction] &&
            allowedJurisdictions[recipientJurisdiction],
            "Jurisdiction not allowed"
        );
        
        require(_verifyReserveBacking(token, amount), "Insufficient reserves");
        
        BridgeOperation memory op = BridgeOperation({
            token: token,
            amount: amount,
            destinationChain: destinationChain,
            recipient: recipient,
            assetType: bytes32(uint256(UniversalAssetRegistry.AssetType.ISO4217W)),
            usePMM: false,
            useVault: false,
            complianceProof: complianceProof,
            vaultInstructions: ""
        });
        
        messageId = this.bridge(op);
        
        return messageId;
    }

    function _verifyReserveBacking(address token, uint256 amount) internal view returns (bool) {
        try IISO4217WToken(token).verifiedReserve() returns (uint256 reserve) {
            return reserve >= amount;
        } catch {
            return verifiedReserves[token] >= amount;
        }
    }

    function _checkKYC(address user) internal view returns (bool) {
        return kycVerified[user] && block.timestamp < kycExpiration[user];
    }

    function setKYCStatus(address user, bool status, uint256 expirationTime) 
        external onlyRole(BRIDGE_OPERATOR_ROLE) {
        kycVerified[user] = status;
        kycExpiration[user] = expirationTime;
        
        if (status) {
            emit KYCVerified(user, expirationTime);
        } else {
            emit KYCRevoked(user);
        }
    }

    function enableJurisdiction(string calldata jurisdiction) external onlyRole(DEFAULT_ADMIN_ROLE) {
        allowedJurisdictions[jurisdiction] = true;
        emit JurisdictionEnabled(jurisdiction);
    }

    function setUserJurisdiction(address user, string calldata jurisdiction) 
        external onlyRole(BRIDGE_OPERATOR_ROLE) {
        userJurisdictions[user] = jurisdiction;
    }

    function updateVerifiedReserve(address token, uint256 reserve)
        external onlyRole(BRIDGE_OPERATOR_ROLE) {
        verifiedReserves[token] = reserve;
        emit ReserveVerified(token, reserve);
    }
}
