#pragma once

#include <cstdint>

struct xcb_connection_t;

struct alignas(16) Vec4 {
	float x, y, z, w;
};

namespace ffi {
struct Core;

struct RedrawArgs {
	Vec4 background;
	float cam_yaw;
	float cam_pitch;
	float cam_distance;
	float cam_fovy;
};
} // namespace ffi

using ffi::RedrawArgs;

class MutCore {
	friend class BoxCore;

public:
	explicit operator bool() const { return ptr; }

	void configure(std::uint32_t width, std::uint32_t height) const;
	void redraw(const RedrawArgs& args) const;

private:
	ffi::Core* ptr = nullptr;
	ffi::Core* use() const;
};

class BoxCore {
public:
	BoxCore() = default;
	BoxCore(const BoxCore&) = delete;
	BoxCore(BoxCore&&);
	BoxCore& operator=(const BoxCore&) = delete;
	BoxCore& operator=(BoxCore&&);
	~BoxCore();

	explicit operator bool() const { return !!ptr; }
	const MutCore* operator->() const { return &ptr; }

	void reset();

	static BoxCore from_xcb(xcb_connection_t* connection, std::uint32_t window, std::uint32_t width, std::uint32_t height);

private:
	MutCore ptr;
};