using Dalamud.Plugin;
using Dalamud.Plugin.Ipc;
using Dalamud.Plugin.Services;

namespace Glamourer.Api.Helpers;

/// <summary>
/// Specialized disposable Subscriber for Events.<para />
/// Subscriptions are wrapped to be individually exception-safe.<para/>
/// Can be enabled and disabled.<para/>
/// </summary>
public sealed class EventSubscriber : IDisposable
{
    private readonly string                        _label;
    private readonly IPluginLog                    _log;
    private readonly Dictionary<Action, Action>    _delegates = new();
    private          ICallGateSubscriber<object?>? _subscriber;
    private          bool                          _disabled;

    public EventSubscriber(IDalamudPluginInterface pi, string label, params Action[] actions)
    {
        _label = label;
        _log   = PluginLogHelper.GetLog(pi);
        try
        {
            _subscriber = pi.GetIpcSubscriber<object?>(label);
            foreach (var action in actions)
                Event += action;

            _disabled = false;
        }
        catch (Exception e)
        {
            _log.Error($"Error registering IPC Subscriber for {label}\n{e}");
            _subscriber = null;
        }
    }

    /// <summary>
    /// Enable all currently subscribed actions registered with this EventSubscriber.
    /// Does nothing if it is already enabled.
    /// </summary>
    public void Enable()
    {
        if (_disabled && _subscriber != null)
        {
            foreach (var action in _delegates.Values)
                _subscriber.Subscribe(action);

            _disabled = false;
        }
    }

    /// <summary>
    /// Disable all subscribed actions registered with this EventSubscriber.
    /// Does nothing if it is already disabled.
    /// Does not forget the actions, only disables them.
    /// </summary>
    public void Disable()
    {
        if (!_disabled)
        {
            if (_subscriber != null)
                foreach (var action in _delegates.Values)
                    _subscriber.Unsubscribe(action);

            _disabled = true;
        }
    }

    /// <summary>
    /// Add or remove an action to the IPC event, if it is valid.
    /// </summary>
    public event Action Event
    {
        add
        {
            if (_subscriber != null && !_delegates.ContainsKey(value))
            {
                void Action()
                {
                    try
                    {
                        value();
                    }
                    catch (Exception e)
                    {
                        _log.Error($"Exception invoking IPC event {_label}:\n{e}");
                    }
                }

                if (_delegates.TryAdd(value, Action) && !_disabled)
                    _subscriber.Subscribe(Action);
            }
        }
        remove
        {
            if (_subscriber != null && _delegates.Remove(value, out var action))
                _subscriber.Unsubscribe(action);
        }
    }

    public void Dispose()
    {
        Disable();
        _subscriber = null;
        _delegates.Clear();
    }

    ~EventSubscriber()
        => Dispose();
}

/// <summary><inheritdoc cref="EventSubscriber"/> </summary>
public sealed class EventSubscriber<T1> : IDisposable
{
    private readonly string                             _label;
    private readonly IPluginLog                         _log;
    private readonly Dictionary<Action<T1>, Action<T1>> _delegates = new();
    private          ICallGateSubscriber<T1, object?>?  _subscriber;
    private          bool                               _disabled;

    public EventSubscriber(IDalamudPluginInterface pi, string label, params Action<T1>[] actions)
    {
        _label = label;
        _log   = PluginLogHelper.GetLog(pi);
        try
        {
            _subscriber = pi.GetIpcSubscriber<T1, object?>(label);
            foreach (var action in actions)
                Event += action;

            _disabled = false;
        }
        catch (Exception e)
        {
            _log.Error($"Error registering IPC Subscriber for {label}\n{e}");
            _subscriber = null;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Enable"/> </summary>
    public void Enable()
    {
        if (_disabled && _subscriber != null)
        {
            foreach (var action in _delegates.Values)
                _subscriber.Subscribe(action);

            _disabled = false;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Disable"/> </summary>
    public void Disable()
    {
        if (!_disabled)
        {
            if (_subscriber != null)
                foreach (var action in _delegates.Values)
                    _subscriber.Unsubscribe(action);

            _disabled = true;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Event"/> </summary>
    public event Action<T1> Event
    {
        add
        {
            if (_subscriber != null && !_delegates.ContainsKey(value))
            {
                void Action(T1 a)
                {
                    try
                    {
                        value(a);
                    }
                    catch (Exception e)
                    {
                        _log.Error($"Exception invoking IPC event {_label}:\n{e}");
                    }
                }

                if (_delegates.TryAdd(value, Action) && !_disabled)
                    _subscriber.Subscribe(Action);
            }
        }
        remove
        {
            if (_subscriber != null && _delegates.Remove(value, out var action))
                _subscriber.Unsubscribe(action);
        }
    }

    public void Dispose()
    {
        Disable();
        _subscriber = null;
        _delegates.Clear();
    }

    ~EventSubscriber()
        => Dispose();
}

/// <summary><inheritdoc cref="EventSubscriber"/> </summary>
public sealed class EventSubscriber<T1, T2> : IDisposable
{
    private readonly string                                     _label;
    private readonly IPluginLog                                 _log;
    private readonly Dictionary<Action<T1, T2>, Action<T1, T2>> _delegates = new();
    private          ICallGateSubscriber<T1, T2, object?>?      _subscriber;
    private          bool                                       _disabled;

    public EventSubscriber(IDalamudPluginInterface pi, string label, params Action<T1, T2>[] actions)
    {
        _label = label;
        _log = PluginLogHelper.GetLog(pi);
        try
        {
            _subscriber = pi.GetIpcSubscriber<T1, T2, object?>(label);
            foreach (var action in actions)
                Event += action;

            _disabled = false;
        }
        catch (Exception e)
        {
            _log.Error($"Error registering IPC Subscriber for {label}\n{e}");
            _subscriber = null;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Enable"/> </summary>
    public void Enable()
    {
        if (_disabled && _subscriber != null)
        {
            foreach (var action in _delegates.Values)
                _subscriber.Subscribe(action);

            _disabled = false;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Disable"/> </summary>
    public void Disable()
    {
        if (!_disabled)
        {
            if (_subscriber != null)
                foreach (var action in _delegates.Values)
                    _subscriber.Unsubscribe(action);

            _disabled = true;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Event"/> </summary>
    public event Action<T1, T2> Event
    {
        add
        {
            if (_subscriber != null && !_delegates.ContainsKey(value))
            {
                void Action(T1 a, T2 b)
                {
                    try
                    {
                        value(a, b);
                    }
                    catch (Exception e)
                    {
                        _log.Error($"Exception invoking IPC event {_label}:\n{e}");
                    }
                }

                if (_delegates.TryAdd(value, Action) && !_disabled)
                    _subscriber.Subscribe(Action);
            }
        }
        remove
        {
            if (_subscriber != null && _delegates.Remove(value, out var action))
                _subscriber.Unsubscribe(action);
        }
    }

    public void Dispose()
    {
        Disable();
        _subscriber = null;
        _delegates.Clear();
    }

    ~EventSubscriber()
        => Dispose();
}

/// <summary><inheritdoc cref="EventSubscriber"/> </summary>
public sealed class EventSubscriber<T1, T2, T3> : IDisposable
{
    private readonly string                                             _label;
    private readonly IPluginLog                                         _log;
    private readonly Dictionary<Action<T1, T2, T3>, Action<T1, T2, T3>> _delegates = new();
    private          ICallGateSubscriber<T1, T2, T3, object?>?          _subscriber;
    private          bool                                               _disabled;

    public EventSubscriber(IDalamudPluginInterface pi, string label, params Action<T1, T2, T3>[] actions)
    {
        _label = label;
        _log   = PluginLogHelper.GetLog(pi);
        try
        {
            _subscriber = pi.GetIpcSubscriber<T1, T2, T3, object?>(label);
            foreach (var action in actions)
                Event += action;

            _disabled = false;
        }
        catch (Exception e)
        {
            _log.Error($"Error registering IPC Subscriber for {label}\n{e}");
            _subscriber = null;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Enable"/> </summary>
    public void Enable()
    {
        if (_disabled && _subscriber != null)
        {
            foreach (var action in _delegates.Values)
                _subscriber.Subscribe(action);

            _disabled = false;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Disable"/> </summary>
    public void Disable()
    {
        if (!_disabled)
        {
            if (_subscriber != null)
                foreach (var action in _delegates.Values)
                    _subscriber.Unsubscribe(action);

            _disabled = true;
        }
    }

    /// <summary><inheritdoc cref="EventSubscriber.Event"/> </summary>
    public event Action<T1, T2, T3> Event
    {
        add
        {
            if (_subscriber != null && !_delegates.ContainsKey(value))
            {
                void Action(T1 a, T2 b, T3 c)
                {
                    try
                    {
                        value(a, b, c);
                    }
                    catch (Exception e)
                    {
                        _log.Error($"Exception invoking IPC event {_label}:\n{e}");
                    }
                }

                if (_delegates.TryAdd(value, Action) && !_disabled)
                    _subscriber.Subscribe(Action);
            }
        }
        remove
        {
            if (_subscriber != null && _delegates.Remove(value, out var action))
                _subscriber.Unsubscribe(action);
        }
    }

    public void Dispose()
    {
        Disable();
        _subscriber = null;
        _delegates.Clear();
    }

    ~EventSubscriber()
        => Dispose();
}