//
// Copyright 2017 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
//

#import "OWSLinkedDeviceReadReceipt.h"
#import <SignalServiceKit/SignalServiceKit-Swift.h>

NS_ASSUME_NONNULL_BEGIN

NSUInteger const OWSLinkedDeviceReadReceiptSchemaVersion = 1;

@interface OWSLinkedDeviceReadReceipt ()

@property (nonatomic, nullable, readonly) NSString *senderPhoneNumber;
@property (nonatomic, nullable, readonly) NSString *senderUUID;
@property (nonatomic, readonly) NSUInteger linkedDeviceReadReceiptSchemaVersion;

@end

@implementation OWSLinkedDeviceReadReceipt

- (instancetype)initWithSenderAci:(AciObjC *)senderAci
                  messageUniqueId:(nullable NSString *)messageUniqueId
               messageIdTimestamp:(uint64_t)messageIdTimestamp
                    readTimestamp:(uint64_t)readTimestamp
{
    OWSAssertDebug(messageIdTimestamp > 0);

    self = [super init];
    if (!self) {
        return self;
    }

    _senderPhoneNumber = nil;
    _senderUUID = senderAci.serviceIdUppercaseString;
    _messageUniqueId = messageUniqueId;
    _messageIdTimestamp = messageIdTimestamp;
    _readTimestamp = readTimestamp;
    _linkedDeviceReadReceiptSchemaVersion = OWSLinkedDeviceReadReceiptSchemaVersion;

    return self;
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-designated-initializers"
- (nullable instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
#pragma clang diagnostic pop
    if (!self) {
        return self;
    }

    // renamed timestamp -> messageIdTimestamp
    if (!_messageIdTimestamp) {
        NSNumber *_Nullable legacyTimestamp = (NSNumber *)[coder decodeObjectForKey:@"timestamp"];
        OWSAssertDebug(legacyTimestamp.unsignedLongLongValue > 0);
        _messageIdTimestamp = legacyTimestamp.unsignedLongLongValue;
    }

    // For legacy objects, before we were tracking read time, use the original messages "sent" timestamp
    // as the local read time. This will always be at least a little bit earlier than the message was
    // actually read, which isn't ideal, but safer than persisting a disappearing message too long, especially
    // since we know they read it on their linked desktop.
    if (_readTimestamp == 0) {
        _readTimestamp = _messageIdTimestamp;
    }

    if (_linkedDeviceReadReceiptSchemaVersion < 1) {
        _senderPhoneNumber = [coder decodeObjectForKey:@"senderId"];
        OWSAssertDebug(_senderPhoneNumber);
    }

    _linkedDeviceReadReceiptSchemaVersion = OWSLinkedDeviceReadReceiptSchemaVersion;

    return self;
}

- (SignalServiceAddress *)senderAddress
{
    return [SignalServiceAddress legacyAddressWithServiceIdString:self.senderUUID phoneNumber:self.senderPhoneNumber];
}

@end

NS_ASSUME_NONNULL_END