// Copyright 2010 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include <SDL.h>

#if SDL_VERSION_ATLEAST(1, 3, 0)
#define USE_SDL_HAPTIC
#endif

#if SDL_VERSION_ATLEAST(2, 0, 14)
#define USE_SDL_GAMECONTROLLER
#endif

#ifdef USE_SDL_HAPTIC
#include <SDL_haptic.h>
#endif

#ifdef USE_SDL_GAMECONTROLLER
#include <SDL_gamecontroller.h>
#endif

#include "InputCommon/ControllerInterface/CoreDevice.h"
#include "InputCommon/ControllerInterface/InputBackend.h"

namespace ciface::SDL
{
std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);

class Joystick : public Core::Device
{
private:
  class Button : public Core::Device::Input
  {
  public:
    std::string GetName() const override;
    Button(u8 index, SDL_Joystick* js) : m_js(js), m_index(index) {}
    ControlState GetState() const override;

  private:
    SDL_Joystick* const m_js;
    const u8 m_index;
  };

  class Axis : public Core::Device::Input
  {
  public:
    std::string GetName() const override;
    Axis(u8 index, SDL_Joystick* js, Sint16 range) : m_js(js), m_range(range), m_index(index) {}
    ControlState GetState() const override;

  private:
    SDL_Joystick* const m_js;
    const Sint16 m_range;
    const u8 m_index;
  };

  class Hat : public Input
  {
  public:
    std::string GetName() const override;
    Hat(u8 index, SDL_Joystick* js, u8 direction) : m_js(js), m_direction(direction), m_index(index)
    {
    }
    ControlState GetState() const override;

  private:
    SDL_Joystick* const m_js;
    const u8 m_direction;
    const u8 m_index;
  };

#ifdef USE_SDL_HAPTIC
  class HapticEffect : public Output
  {
  public:
    HapticEffect(SDL_Haptic* haptic);
    ~HapticEffect();

  protected:
    virtual bool UpdateParameters(s16 value) = 0;
    static void SetDirection(SDL_HapticDirection* dir);

    SDL_HapticEffect m_effect = {};

    static constexpr u16 DISABLED_EFFECT_TYPE = 0;

  private:
    virtual void SetState(ControlState state) override final;
    void UpdateEffect();
    SDL_Haptic* const m_haptic;
    int m_id = -1;
  };

  class ConstantEffect : public HapticEffect
  {
  public:
    ConstantEffect(SDL_Haptic* haptic);
    std::string GetName() const override;

  private:
    bool UpdateParameters(s16 value) override;
  };

  class RampEffect : public HapticEffect
  {
  public:
    RampEffect(SDL_Haptic* haptic);
    std::string GetName() const override;

  private:
    bool UpdateParameters(s16 value) override;
  };

  class PeriodicEffect : public HapticEffect
  {
  public:
    PeriodicEffect(SDL_Haptic* haptic, u16 waveform);
    std::string GetName() const override;

  private:
    bool UpdateParameters(s16 value) override;

    const u16 m_waveform;
  };

  class LeftRightEffect : public HapticEffect
  {
  public:
    enum class Motor : u8
    {
      Weak,
      Strong,
    };

    LeftRightEffect(SDL_Haptic* haptic, Motor motor);
    std::string GetName() const override;

  private:
    bool UpdateParameters(s16 value) override;

    const Motor m_motor;
  };
#endif

#if SDL_VERSION_ATLEAST(2, 0, 9)
  class Motor : public Output
  {
  public:
    explicit Motor(SDL_Joystick* js) : m_js(js){};
    std::string GetName() const override;
    void SetState(ControlState state) override;

  private:
    SDL_Joystick* const m_js;
  };
#endif

#ifdef USE_SDL_GAMECONTROLLER
  class MotionInput : public Input
  {
  public:
    MotionInput(std::string name, SDL_GameController* gc, SDL_SensorType type, int index,
                ControlState scale)
        : m_name(std::move(name)), m_gc(gc), m_type(type), m_index(index), m_scale(scale){};

    std::string GetName() const override { return m_name; };
    bool IsDetectable() const override { return false; };
    ControlState GetState() const override;

  private:
    std::string m_name;

    SDL_GameController* const m_gc;
    SDL_SensorType const m_type;
    int const m_index;

    ControlState const m_scale;
  };
#endif

public:
  Joystick(SDL_Joystick* const joystick, const int sdl_index);
  ~Joystick();

  std::string GetName() const override;
  std::string GetSource() const override;
  SDL_Joystick* GetSDLJoystick() const;

private:
  SDL_Joystick* const m_joystick;
  std::string m_name;

#ifdef USE_SDL_HAPTIC
  SDL_Haptic* m_haptic = nullptr;
#endif

#ifdef USE_SDL_GAMECONTROLLER
  SDL_GameController* m_controller = nullptr;
#endif
};
}  // namespace ciface::SDL