using UnityEngine;
using UnityEngine.Events;

public abstract class ActDetectorBase : MonoBehaviour
{
    protected const string CONTAINER_NAME = "anticheat detectors";
    protected const string MENU_PATH = "poc/anticheat/";
    protected const string GAME_OBJECT_MENU_PATH = "GameObject/Create Other/" + MENU_PATH;

    protected static GameObject detectorsContainer;

    /// <summary>
    /// Allows to start detector automatically.
    /// Otherwise, you'll need to call StartDetection() method to start it.
    /// </summary>
    /// Useful in conjunction with proper Detection Event configuration in the inspector.
    /// Allows to use detector without writing any code except the actual reaction on cheating.
    [Tooltip("Automatically start detector. Detection Event will be called on detection.")]
    public bool autoStart = false;

    /// <summary>
    /// Detector will survive new level (scene) load if checked. Otherwise it will be destroyed.
    /// </summary>
    /// On dispose Detector follows 2 rules:
    /// - if Game Object's name is "Anti-Cheat Toolkit Detectors": it will be automatically 
    /// destroyed if no other Detectors left attached regardless of any other components or children;<br/>
    /// - if Game Object's name is NOT "Anti-Cheat Toolkit Detectors": it will be automatically destroyed only
    /// if it has neither other components nor children attached;
    [Tooltip("Detector will survive new level (scene) load if checked.")]
    public bool keepAlive = true;

    /// <summary>
    /// Detector component will be automatically disposed after firing callback if enabled.
    /// Otherwise, it will just stop internal processes.
    /// </summary>
    /// On dispose Detector follows 2 rules:
    /// - if Game Object's name is "Anti-Cheat Toolkit Detectors": it will be automatically 
    /// destroyed if no other Detectors left attached regardless of any other components or children;<br/>
    /// - if Game Object's name is NOT "Anti-Cheat Toolkit Detectors": it will be automatically destroyed only
    /// if it has neither other components nor children attached;
    [Tooltip("Automatically dispose Detector after firing callback.")]
    public bool autoDispose = true;

    [SerializeField]
    protected UnityEvent detectionEvent = null;
    protected UnityAction detectionAction = null;

    [SerializeField]
    protected bool detectionEventHasListener = false;

    protected bool isRunning;
    protected bool started;

    #region detectors placement

#if UNITY_EDITOR
    /*[UnityEditor.MenuItem(GAME_OBJECT_MENU_PATH + "All detectors", false, 0)]
    private static void AddAllDetectorsToScene()
    {
        AddInjectionDetectorToScene();
        AddSpeedHackDetectorToScene();
    }

    [UnityEditor.MenuItem(GAME_OBJECT_MENU_PATH + InjectionDetector.COMPONENT_NAME, false, 1)]
    private static void AddInjectionDetectorToScene()
    {
        SetupDetectorInScene<InjectionDetector>();
    }

    [UnityEditor.MenuItem(GAME_OBJECT_MENU_PATH + SpeedHackDetector.COMPONENT_NAME, false, 1)]
    private static void AddSpeedHackDetectorToScene()
    {
        SetupDetectorInScene<SpeedHackDetector>();
    }*/


    static void SetupDetectorInScene<T>() where T : ActDetectorBase
    {
        T component = FindObjectOfType<T>();

        string detectorName = typeof(T).Name;
        if(component !=null)
        {
            if(component.gameObject.name == CONTAINER_NAME)
            {
                UnityEditor.EditorUtility.DisplayDialog(detectorName + " already exists!", detectorName + " already exists in scene and correctly placed on object \"" + CONTAINER_NAME + "\"", "OK");
            }
            else
            {
                int dialogResult = UnityEditor.EditorUtility.DisplayDialogComplex(detectorName + " already exists!", detectorName + " already exists in scene and placed on object \"" + component.gameObject.name + "\". Do you wish to move it to the Game Object \"" + CONTAINER_NAME + "\" or delete it from scene at all?", "Move", "Delete", "Cancel");
                switch (dialogResult)
                {
                    case 0:
                        GameObject container = GameObject.Find(CONTAINER_NAME);
                        if (container == null)
                        {
                            container = new GameObject(CONTAINER_NAME);
                        }
                        T newComponent = container.AddComponent<T>();
                        UnityEditor.EditorUtility.CopySerialized(component, newComponent);
                        DestroyDetectorImmediate(component);
                        break;
                    case 1:
                        DestroyDetectorImmediate(component);
                        break;
                }
            }
        }else
        {
            GameObject container = GameObject.Find(CONTAINER_NAME);
            if (container == null)
            {
                container = new GameObject(CONTAINER_NAME);

                UnityEditor.Undo.RegisterCreatedObjectUndo(container, "Create " + CONTAINER_NAME);
            }
            UnityEditor.Undo.AddComponent<T>(container);

            UnityEditor.EditorUtility.DisplayDialog(detectorName + " added!", detectorName + " successfully added to the object \"" + CONTAINER_NAME + "\"", "OK");
        }
    }

    static void DestroyDetectorImmediate(ActDetectorBase component)
    {
        if (component.transform.childCount == 0 && component.GetComponentsInChildren<Component>(true).Length <= 2)
        {
            DestroyImmediate(component.gameObject);
        }
        else
        {
            DestroyImmediate(component);
        }
    }
#endif
    #endregion

    #region UNITY_MESSAGES
    private void Start()
    {
        if (detectorsContainer == null && gameObject.name == CONTAINER_NAME)
        {
            detectorsContainer = gameObject;
        }

        if (autoStart && !started)
        {
            StartDetectionAutomatically();
        }
    }

    private void OnEnable()
    {
        if (!started || (!detectionEventHasListener && detectionAction == null))
            return;

        ResumeDetector();
    }

    private void OnDisable()
    {
        if (!started) return;

        PauseDetector();
    }

    private void OnApplicationQuit()
    {
        DisposeInternal();
    }

    protected virtual void OnDestroy()
    {
        StopDetectionInternal();

        if (transform.childCount == 0 && GetComponentsInChildren<Component>().Length <= 2)
        {
            Destroy(gameObject);
        }
        else if (name == CONTAINER_NAME && GetComponentsInChildren<ActDetectorBase>().Length <= 1)
        {
            Destroy(gameObject);
        }
    }
    #endregion

    protected virtual bool Init(ActDetectorBase instance, string detectorName)
    {
        if (instance != null && instance != this && instance.keepAlive)
        {
            Destroy(this);
            return false;
        }

        DontDestroyOnLoad(gameObject);
        return true;
    }

    protected virtual void DisposeInternal()
    {
        Destroy(this);
    }

    internal virtual void OnCheatingDetected()
    {
        if (detectionAction != null) detectionAction();
        if (detectionEventHasListener) detectionEvent.Invoke();

        //if (autoDispose)
        //{
        //    DisposeInternal();
        //}
        //else
        //{
        //    StopDetectionInternal();
        //}
    }

    protected abstract void StartDetectionAutomatically();
    protected abstract void StopDetectionInternal();
    protected abstract void PauseDetector();
    protected abstract void ResumeDetector();
}