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 * OPC Foundation MIT License 1.00
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using System.Collections.Generic;
using Microsoft.Extensions.Options;

namespace Opc.Ua.Client.Subscriptions
{
    /// <summary>
    /// Internal contract between
    /// <see cref="ISubscriptionManager.LoadAsync"/> and the V2
    /// <see cref="Subscription"/> constructor that pre-installs
    /// server-assigned identifiers + per-item state so the V2 state
    /// machine can take over an existing server-side subscription via
    /// <c>TransferSubscriptions</c> instead of issuing a fresh
    /// <c>CreateSubscription</c>. This struct deliberately does NOT
    /// surface the public <see cref="SubscriptionStateSnapshot"/> shape
    /// to the engine so the engine has no DTO coupling.
    /// </summary>
    internal sealed record SubscriptionLoadState(
        uint ServerId,
        IReadOnlyList<MonitoredItemLoadState> MonitoredItems);

    /// <summary>
    /// Per-item version of <see cref="SubscriptionLoadState"/>.
    /// </summary>
    internal sealed record MonitoredItemLoadState(
        string Name,
        IOptionsMonitor<MonitoredItems.MonitoredItemOptions> Options,
        uint ClientHandle,
        uint ServerId,
        uint TriggeringItemClientHandle);
}