/**
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

/**
 * MTRThreadOperationalDataset allows converting between an "expanded" view of
 * the dataset (with the separate fields) and a single-blob NSData view.
 *
 * The latter can be used to pass Thread network credentials via
 * MTRCommissioningParameters.
 */
@interface MTRThreadOperationalDataset : NSObject

/**
 * The expected lengths of each of the NSData fields in the MTRThreadOperationalDataset
 */
extern size_t const MTRSizeThreadNetworkName;
extern size_t const MTRSizeThreadExtendedPANID;
extern size_t const MTRSizeThreadMasterKey;
extern size_t const MTRSizeThreadPSKc;
extern size_t const MTRSizeThreadPANID;

/**
 * The Thread Network name
 */
@property (nonatomic, copy, readonly) NSString * networkName;
/**
 * The Thread Network extendended PAN ID
 */
@property (nonatomic, copy, readonly) NSData * extendedPANID;
/**
 * The 16 byte Master Key
 */
@property (nonatomic, copy, readonly) NSData * masterKey;
/**
 * The Thread PSKc
 */
@property (nonatomic, copy, readonly) NSData * PSKc;
/**
 * The Thread network channel.  Always an unsigned 16-bit integer.
 */
@property (nonatomic, copy, readonly) NSNumber * channel;
/**
 * A uint16_t stored as 2-bytes in host order representing the Thread PAN ID
 */
@property (nonatomic, copy, readonly) NSData * panID;

- (instancetype)init NS_UNAVAILABLE;
+ (instancetype)new NS_UNAVAILABLE;

/**
 * Create a Thread Operational Dataset object with the individual network
 * fields.
 *
 * @param extendedPANID Must be MTRSizeThreadExtendedPANID bytes.  Otherwise nil
 *                      will be returned.
 * @param masterKey Must be MTRSizeThreadMasterKey bytes. Otherwise nil will be
 *                  returned.
 * @param PSKc Must be MTRSizeThreadPSKc bytes.  Otherwise nil will be returned.
 * @param channel Must be an unsigned 16-bit value.
 * @param panID Must be MTRSizeThreadPANID bytes.  Otherwise nil will be
 *              returned.  In particular, it's expected to be a 16-bit unsigned
 *              integer stored as 2 bytes in host order.
 */
- (instancetype _Nullable)initWithNetworkName:(NSString *)networkName
                                extendedPANID:(NSData *)extendedPANID
                                    masterKey:(NSData *)masterKey
                                         PSKc:(NSData *)PSKc
                                      channel:(NSNumber *)channel
                                        panID:(NSData *)panID;

/**
 * Create a Thread Operational Dataset object with a RCP formatted active operational dataset.
 * This initializer will return nil if the input data cannot be parsed correctly
 */
- (instancetype _Nullable)initWithData:(NSData *)data;

/**
 * Get the underlying data that represents the Thread Active Operational Dataset
 * This can be used for the threadOperationalDataset of MTRCommissioningParameters.
 */
- (NSData *)data;

@end

NS_ASSUME_NONNULL_END