batchManager.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 13.10.2025.
//
//
//
#pragma once
 
#include <memory>
#include <unordered_map>
#include <vector>
 
#include "batch.h"
#include "batchGroup.h"
#include "scene/layer.h"
 
namespace visutwin::canvas
{
    class GraphicsDevice;
    class Scene;

    class BatchManager
    {
    public:
        explicit BatchManager(GraphicsDevice* device);

        void addGroup(const BatchGroup& group);

        void removeGroup(int groupId);

        void prepare(Scene* scene = nullptr);

        void destroy(Scene* scene = nullptr);

        void updateAll();
 
        const std::vector<std::unique_ptr<Batch>>& batches() const { return _batches; }

        const BatchGroup* getGroupById(int groupId) const;
 
    private:
        std::unique_ptr<Batch> createBatch(const std::vector<MeshInstance*>& meshInstances,
                                            int batchGroupId);

        std::unique_ptr<Batch> createDynamicBatch(const std::vector<MeshInstance*>& meshInstances,
                                                   int batchGroupId);
 
        GraphicsDevice* _device;
        std::unordered_map<int, BatchGroup> _groups;
        std::vector<std::unique_ptr<Batch>> _batches;
    };
}