using FieldLogger.Models;

namespace FieldLogger.Services.Sync;

/// <summary>
/// Placeholder for the future MQTT synchronization layer:
/// - subscribe to receive jobs configured on the server
/// - publish logged points as they are captured
/// - reconcile the Synced flags on <see cref="Job"/> and <see cref="LoggedPoint"/>
/// Planned implementation: MQTTnet client against the configured broker.
/// </summary>
public interface IMqttSyncService
{
    bool IsConnected { get; }
    Task ConnectAsync(CancellationToken cancellationToken = default);
    Task DisconnectAsync();
    Task PublishPointAsync(LoggedPoint point, CancellationToken cancellationToken = default);
}

/// <summary>No-op stand-in until the MQTT backend exists.</summary>
public sealed class NullMqttSyncService : IMqttSyncService
{
    public bool IsConnected => false;
    public Task ConnectAsync(CancellationToken cancellationToken = default) => Task.CompletedTask;
    public Task DisconnectAsync() => Task.CompletedTask;
    public Task PublishPointAsync(LoggedPoint point, CancellationToken cancellationToken = default) => Task.CompletedTask;
}