// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include <kiwano/2d/LayerActor.h>

namespace kiwano
{
namespace imgui
{
KGE_DECLARE_SMART_PTR(ImGuiLayer);

/// \~chinese
/// @brief ImGui管道
using ImGuiPipeline = Function<void()>;

/**
 * \~chinese
 * @brief ImGui图层
 */
class ImGuiLayer : public LayerActor
{
public:
    /// \~chinese
    /// @brief 创建ImGui图层
    static ImGuiLayerPtr Create();

    /// \~chinese
    /// @brief 创建ImGui图层
    /// @param name 元素名称
    /// @param item 管道
    static ImGuiLayerPtr Create(String const& name, ImGuiPipeline const& item);

    ImGuiLayer();

    virtual ~ImGuiLayer();

    /// \~chinese
    /// @brief 添加 ImGui 元素
    /// @param name 元素名称
    /// @param item 管道
    void AddItem(String const& name, ImGuiPipeline const& item);

    /// \~chinese
    /// @brief 移除 ImGui 元素
    /// @param name 元素名称
    void RemoveItem(String const& name);

    // 移除所有元素
    /// \~chinese
    /// @brief 移除所有元素
    void RemoveAllItems();

public:
    void OnRender(RenderContext& ctx) override;

    bool CheckVisibility(RenderContext& ctx) const override;

private:
    Map<String, ImGuiPipeline> pipelines_;
};
}  // namespace imgui
}  // namespace kiwano