// Copyright 2010 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <algorithm>
#include <map>
#include <sstream>
#include <string>
#include <vector>

#include "Common/CommonTypes.h"
#include "Common/Thread.h"
#include "InputCommon/ControllerInterface/Device.h"
#include "InputCommon/ControllerInterface/ExpressionParser.h"

// enable disable sources
#ifdef _WIN32
#define CIFACE_USE_XINPUT
#define CIFACE_USE_DINPUT
#endif
#if defined(HAVE_X11) && HAVE_X11
#define CIFACE_USE_XLIB
#endif
#if defined(__APPLE__)
#define CIFACE_USE_OSX
#endif
#if defined(HAVE_SDL) && HAVE_SDL
#define CIFACE_USE_SDL
#endif
#if defined(HAVE_LIBEVDEV) && defined(HAVE_LIBUDEV)
#define CIFACE_USE_EVDEV
#endif
#if defined(USE_PIPES)
#define CIFACE_USE_PIPES
#endif

//
// ControllerInterface
//
// Some crazy shit I made to control different device inputs and outputs
// from lots of different sources, hopefully more easily.
//
class ControllerInterface : public ciface::Core::DeviceContainer
{
public:
  //
  // ControlReference
  //
  // These are what you create to actually use the inputs, InputReference or OutputReference.
  //
  // After being bound to devices and controls with ControllerInterface::UpdateReference,
  // each one can link to multiple devices and controls
  // when you change a ControlReference's expression,
  // you must use ControllerInterface::UpdateReference on it to rebind controls
  //
  class ControlReference
  {
    friend class ControllerInterface;

  public:
    virtual ControlState State(const ControlState state = 0) = 0;
    virtual ciface::Core::Device::Control* Detect(const unsigned int ms,
                                                  ciface::Core::Device* const device) = 0;

    ControlState range;
    std::string expression;
    const bool is_input;
    ciface::ExpressionParser::ExpressionParseStatus parse_error;

    virtual ~ControlReference() { delete parsed_expression; }
    int BoundCount()
    {
      if (parsed_expression)
        return parsed_expression->num_controls;
      else
        return 0;
    }

  protected:
    ControlReference(const bool _is_input)
        : range(1), is_input(_is_input), parsed_expression(nullptr)
    {
    }
    ciface::ExpressionParser::Expression* parsed_expression;
  };

  //
  // InputReference
  //
  // Control reference for inputs
  //
  class InputReference : public ControlReference
  {
  public:
    InputReference() : ControlReference(true) {}
    ControlState State(const ControlState state) override;
    ciface::Core::Device::Control* Detect(const unsigned int ms,
                                          ciface::Core::Device* const device) override;
  };

  //
  // OutputReference
  //
  // Control reference for outputs
  //
  class OutputReference : public ControlReference
  {
  public:
    OutputReference() : ControlReference(false) {}
    ControlState State(const ControlState state) override;
    ciface::Core::Device::Control* Detect(const unsigned int ms,
                                          ciface::Core::Device* const device) override;
  };

  ControllerInterface() : m_is_init(false), m_hwnd(nullptr) {}
  void Initialize(void* const hwnd);
  void Reinitialize();
  void Shutdown();
  void AddDevice(std::shared_ptr<ciface::Core::Device> device);
  void RemoveDevice(std::function<bool(const ciface::Core::Device*)> callback);
  bool IsInit() const { return m_is_init; }
  void UpdateReference(ControlReference* control,
                       const ciface::Core::DeviceQualifier& default_device) const;
  void UpdateInput();

  void RegisterHotplugCallback(std::function<void(void)> callback);
  void InvokeHotplugCallbacks() const;

private:
  std::vector<std::function<void()>> m_hotplug_callbacks;
  bool m_is_init;
  void* m_hwnd;
};

extern ControllerInterface g_controller_interface;