#pragma once

#include "rendering/renderer_backend.h"

// Live-window Vulkan backend: owns the instance, surface, device, swapchain,
// render pass, framebuffers and per-frame synchronization, and drives the
// acquire -> record -> submit -> present loop. Implements the shared
// RendererBackend interface (SceneObject / BlackHoleParams live there). Pure-C++
// header (no vulkan.h / glfw leak); the GLFW window is passed as an opaque handle.
namespace Donut
{
    // Must be called BEFORE glfwInit() when the Vulkan API is selected: points
    // GLFW at the loader the app links against (GLFW's own dlopen fails on
    // macOS/Homebrew) and configures the MoltenVK ICD / layer paths.
    auto vulkan_prepare_glfw() -> void;

    class VulkanRenderer : public RendererBackend
    {
    public:
        VulkanRenderer();
        ~VulkanRenderer() override;

        // glfwWindow must be a GLFW window created with GLFW_NO_API.
        auto init(void* glfwWindow, int width, int height) -> bool override;
        auto init_ui() -> bool override;
        auto shutdown() -> void override;
        auto resize(int width, int height) -> void override;

        auto draw_frame(const glm::vec4& clear_color,
                        const std::function<void()>& build_ui) -> void override;

        auto set_scene_mode(bool enabled) -> void override;
        auto is_scene_mode() const -> bool override;
        auto set_free_fly(bool enabled) -> void override;   // seeds the fly pose from the orbital framing
        auto is_free_fly() const -> bool override;
        auto reset_camera() -> void override;

        auto set_hdri(const std::string& path) -> void override;  // rebuilds the cubemap (device-idle)
        auto current_hdri() const -> const std::string& override;
        auto scene_objects() -> std::vector<SceneObject>& override;
        auto set_selected_object(int index) -> void override;
        auto black_hole_params() -> BlackHoleParams& override;

        auto device_name() const -> const std::string& override;

    private:
        struct Impl;
        Impl* m_impl = nullptr;
    };
}