// Copyright (c) Wojciech Figat. All rights reserved.

#pragma once

#include "../Actor.h"
#include "../SceneInfo.h"
#include "SceneLightmapsData.h"
#include "SceneCSGData.h"
#include "SceneRendering.h"
#include "SceneTicking.h"
#include "SceneNavigation.h"

class MeshCollider;

/// <summary>
/// The scene root object that contains a hierarchy of actors.
/// </summary>
API_CLASS() class FLAXENGINE_API Scene : public Actor
{
    friend class Level;
    friend class ReloadScriptsAction;
    friend class SceneLoader;
    DECLARE_SCENE_OBJECT(Scene);

    /// <summary>
    /// Finalizes an instance of the <see cref="Scene"/> class.
    /// </summary>
    ~Scene();

public:
    /// <summary>
    /// The scene metadata.
    /// </summary>
    SceneInfo Info;

    /// <summary>
    /// The scene rendering manager.
    /// </summary>
    SceneRendering Rendering;

    /// <summary>
    /// The scene ticking manager.
    /// </summary>
    SceneTicking Ticking;

    /// <summary>
    /// The navigation data.
    /// </summary>
    SceneNavigation Navigation;

    /// <summary>
    /// The static light manager for this scene.
    /// </summary>
    SceneLightmapsData LightmapsData;

    /// <summary>
    /// The CSG data container for this scene.
    /// </summary>
    CSG::SceneCSGData CSGData;

    /// <summary>
    /// Gets the lightmap settings (per scene).
    /// </summary>
    API_PROPERTY(Attributes="EditorDisplay(\"Lightmap Settings\", EditorDisplayAttribute.InlineStyle)")
    LightmapSettings GetLightmapSettings() const;

    /// <summary>
    /// Sets the lightmap settings (per scene).
    /// </summary>
    API_PROPERTY() void SetLightmapSettings(const LightmapSettings& value);

public:
    /// <summary>
    /// Removes all baked lightmap textures from the scene.
    /// </summary>
    API_FUNCTION() void ClearLightmaps();

    /// <summary>
    /// Builds the CSG geometry for the given scene.
    /// </summary>
    /// <remarks>Requests are enqueued till the next game scripts update.</remarks>
    /// <param name="timeoutMs">The timeout to wait before building CSG (in milliseconds).</param>
    API_FUNCTION() void BuildCSG(float timeoutMs = 50);

#if USE_EDITOR

    /// <summary>
    /// Gets path to the scene file
    /// </summary>
    API_PROPERTY() String GetPath() const;

    /// <summary>
    /// Gets filename of the scene file
    /// </summary>
    API_PROPERTY() String GetFilename() const;

    /// <summary>
    /// Gets path to the scene data folder
    /// </summary>
    API_PROPERTY() String GetDataFolderPath() const;

    /// <summary>
    /// Gets the asset references (scene asset). Supported only in Editor.
    /// </summary>
    /// <seealso cref="Asset.GetReferences"/>
    /// <returns>The collection of the asset ids referenced by this asset.</returns>
    API_FUNCTION() Array<Guid, HeapAllocation> GetAssetReferences() const;

#endif

private:
    MeshCollider* TryGetCsgCollider();
    StaticModel* TryGetCsgModel();
    void CreateCsgCollider();
    void CreateCsgModel();
    void OnCsgCollisionDataChanged();
    void OnCsgModelChanged();
#if COMPILE_WITH_CSG_BUILDER
    void OnCSGBuildEnd();
#endif

public:
    // [Actor]
    void Serialize(SerializeStream& stream, const void* otherObj) override;
    void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
    void OnDeleteObject() override;
    void EndPlay() override;

protected:
    // [Actor]
    void Initialize() override;
    void BeginPlay(SceneBeginData* data) override;
    void OnTransformChanged() override;
};
