//  SPDX-License-Identifier: MIT
//
//  ES-DE Frontend
//  InputManager.h
//
//  Low-level input handling.
//  Initiates and maps the keyboard and controllers.
//  Reads and writes the es_input.xml configuration file.
//

#ifndef ES_CORE_INPUT_MANAGER_H
#define ES_CORE_INPUT_MANAGER_H

#include "CECInput.h"

#if defined(__ANDROID__)
#include "InputOverlay.h"
#endif

#include <SDL2/SDL.h>
#include <SDL2/SDL_joystick.h>

#include <map>
#include <memory>
#include <string>

class InputConfig;
class Window;

class InputManager
{
public:
    static InputManager& getInstance();

    void init();
    void deinit();

    void writeDeviceConfig(InputConfig* config);
    void doOnFinish();

    static std::string getConfigPath();
    static std::string getTemporaryConfigPath();

    int getNumConfiguredDevices();
    int getAxisCountByDevice(int deviceId);
    int getButtonCountByDevice(int deviceId);

    std::string getDeviceGUIDString(int deviceId);
    InputConfig* getInputConfigByDevice(int deviceId);

    bool parseEvent(const SDL_Event& event);

    int getNumJoysticks() { return static_cast<int>(mJoysticks.size()); }

private:
    InputManager() noexcept;
    virtual ~InputManager();

    bool initialized() const { return mKeyboardInputConfig != nullptr; }

    bool loadInputConfig(InputConfig* config);
    void loadDefaultKBConfig();
    void loadDefaultControllerConfig(SDL_JoystickID deviceIndex);
    void loadTouchConfig();

    void addControllerByDeviceIndex(Window* window, int deviceIndex);
    void removeControllerByJoystickID(Window* window, SDL_JoystickID joyID);

    Window* mWindow;
    CECInput mCECInput;
#if defined(__ANDROID__)
    InputOverlay& mInputOverlay;
#endif

    static const int DEADZONE_TRIGGERS = 18000;
    static const int DEADZONE_THUMBSTICKS = 23000;
    bool mConfigFileExists;

    std::map<SDL_JoystickID, SDL_Joystick*> mJoysticks;
    std::map<SDL_JoystickID, SDL_GameController*> mControllers;
    std::map<SDL_JoystickID, std::unique_ptr<InputConfig>> mInputConfigs;

    std::unique_ptr<InputConfig> mKeyboardInputConfig;
    std::unique_ptr<InputConfig> mTouchInputConfig;
    std::unique_ptr<InputConfig> mCECInputConfig;

    std::map<std::pair<SDL_JoystickID, int>, int> mPrevAxisValues;
    std::map<std::pair<SDL_JoystickID, int>, int> mPrevButtonValues;
};

#endif // ES_CORE_INPUT_MANAGER_H