using System.Security.Claims;
using AyCode.Core.Extensions;
using AyCode.Core.Tests.TestModels;
using AyCode.Models.Server.DynamicMethods;
using AyCode.Services.Server.SignalRs;
using AyCode.Services.SignalRs;
using Microsoft.Extensions.Configuration;

namespace AyCode.Services.Server.Tests.SignalRs;

/// <summary>
/// Testable SignalR hub that overrides infrastructure dependencies.
/// Enables unit testing without SignalR server or mocks.
/// </summary>
public class TestableSignalRHub : AcWebSignalRHubBase<TestSignalRTags, TestLogger>
{
    #region Captured Data for Assertions

    /// <summary>
    /// Messages sent via ResponseToCaller or SendMessageToClient
    /// </summary>
    public List<SentMessage> SentMessages { get; } = [];
    
    /// <summary>
    /// Whether notFoundCallback was invoked
    /// </summary>
    public bool WasNotFoundCallbackInvoked { get; private set; }
    
    /// <summary>
    /// The tag name passed to notFoundCallback
    /// </summary>
    public string? NotFoundTagName { get; private set; }

    #endregion

    #region Test Configuration

    /// <summary>
    /// Simulated connection ID
    /// </summary>
    public string TestConnectionId { get; set; } = "test-connection-id";
    
    /// <summary>
    /// Simulated user identifier
    /// </summary>
    public string? TestUserIdentifier { get; set; } = "test-user-id";
    
    /// <summary>
    /// Simulated connection aborted state
    /// </summary>
    public bool TestIsConnectionAborted { get; set; } = false;
    
    /// <summary>
    /// Simulated ClaimsPrincipal (optional)
    /// </summary>
    public ClaimsPrincipal? TestUser { get; set; }

    #endregion

    public TestableSignalRHub() 
        : base(new ConfigurationBuilder().Build(), new TestLogger())
    {
    }

    public TestableSignalRHub(IConfiguration configuration, TestLogger logger) 
        : base(configuration, logger)
    {
    }

    #region Public Test Entry Points

    /// <summary>
    /// Sets the serializer type for testing (JSON or Binary).
    /// </summary>
    public void SetSerializerType(AcSerializerType serializerType)
    {
        SerializerOptions = serializerType == AcSerializerType.Binary 
            ? new AcBinarySerializerOptions() 
            : new AcJsonSerializerOptions();
    }

    /// <summary>
    /// Register a service with SignalR-attributed methods
    /// </summary>
    public void RegisterService(object service)
    {
        DynamicMethodCallModels.Add(new AcDynamicMethodCallModel<SignalRAttribute>(service));
    }

    /// <summary>
    /// Invoke ProcessOnReceiveMessage for testing
    /// </summary>
    public Task InvokeProcessOnReceiveMessage(int messageTag, byte[]? message, int? requestId = null)
    {
        return ProcessOnReceiveMessage(messageTag, message, requestId, async tagName =>
        {
            WasNotFoundCallbackInvoked = true;
            NotFoundTagName = tagName;
            await Task.CompletedTask;
        });
    }

    /// <summary>
    /// Get the logger for assertions
    /// </summary>
    public new TestLogger Logger => base.Logger;

    /// <summary>
    /// Reset captured state for next test
    /// </summary>
    public void Reset()
    {
        SentMessages.Clear();
        WasNotFoundCallbackInvoked = false;
        NotFoundTagName = null;
        Logger.Clear();
    }

    #endregion

    #region Overridden Context Accessors

    protected override string GetConnectionId() => TestConnectionId;
    
    protected override bool IsConnectionAborted() => TestIsConnectionAborted;
    
    protected override string? GetUserIdentifier() => TestUserIdentifier;
    
    protected override ClaimsPrincipal? GetUser() => TestUser;

    #endregion

    #region Overridden Response Methods (capture messages for testing)

    protected override Task ResponseToCaller(int messageTag, ISignalRMessage message, int? requestId)
    {
        SentMessages.Add(new SentMessage(
            MessageTag: messageTag,
            Message: message,
            RequestId: requestId,
            Target: SendTarget.Caller
        ));
        return Task.CompletedTask;
    }

    protected override Task SendMessageToClient(IAcSignalRHubItemServer sendTo, int messageTag, ISignalRMessage message, int? requestId = null)
    {
        SentMessages.Add(new SentMessage(
            MessageTag: messageTag,
            Message: message,
            RequestId: requestId,
            Target: SendTarget.Client
        ));
        return Task.CompletedTask;
    }

    protected override Task SendMessageToOthers(int messageTag, object? content)
    {
        SentMessages.Add(new SentMessage(
            MessageTag: messageTag,
            Message: new SignalResponseJsonMessage(messageTag, SignalResponseStatus.Success, content),
            RequestId: null,
            Target: SendTarget.Others
        ));
        return Task.CompletedTask;
    }

    protected override Task SendMessageToAll(int messageTag, object? content)
    {
        SentMessages.Add(new SentMessage(
            MessageTag: messageTag,
            Message: new SignalResponseJsonMessage(messageTag, SignalResponseStatus.Success, content),
            RequestId: null,
            Target: SendTarget.All
        ));
        return Task.CompletedTask;
    }

    protected override Task SendMessageToUserIdInternal(string userId, int messageTag, ISignalRMessage message, int? requestId)
    {
        SentMessages.Add(new SentMessage(
            MessageTag: messageTag,
            Message: message,
            RequestId: requestId,
            Target: SendTarget.User,
            TargetId: userId
        ));
        return Task.CompletedTask;
    }

    #endregion
}

/// <summary>
/// Captured sent message for assertions
/// </summary>
public record SentMessage(
    int MessageTag,
    ISignalRMessage Message,
    int? RequestId,
    SendTarget Target,
    string? TargetId = null)
{
    /// <summary>
    /// Get the response as SignalResponseJsonMessage for inspection
    /// </summary>
    public SignalResponseJsonMessage? AsJsonResponse => Message as SignalResponseJsonMessage;
}

/// <summary>
/// Target of the sent message
/// </summary>
public enum SendTarget
{
    Caller,
    Client,
    Others,
    All,
    User,
    Group
}