//
//  InputConfig.h
//
//  Input device configuration functions.
//

#pragma once
#ifndef ES_CORE_INPUT_CONFIG_H
#define ES_CORE_INPUT_CONFIG_H

#include <CECInput.h>
#include <map>
#include <sstream>
#include <vector>

#ifdef __linux__
#include <SDL2/SDL_joystick.h>
#include <SDL2/SDL_keyboard.h>
#else
#include "SDL_joystick.h"
#include "SDL_keyboard.h"
#endif

#define DEVICE_KEYBOARD -1
#define DEVICE_CEC      -2

enum InputType {
    TYPE_AXIS,
    TYPE_BUTTON,
    TYPE_HAT,
    TYPE_KEY,
    TYPE_CEC_BUTTON,
    TYPE_COUNT
};

namespace pugi
{
    class xml_node;
}

struct Input
{
public:
    int device;
    InputType type;
    int id;
    int value;
    bool configured;

    Input()
    {
        device = DEVICE_KEYBOARD;
        configured = false;
        id = -1;
        value = -999;
        type = TYPE_COUNT;
    }

    Input(
            int dev,
            InputType t,
            int i,
            int val,
            bool conf)
            : device(dev),
            type(t),id(i),
            value(val),
            configured(conf)
    {
    }

    std::string getHatDir(int val)
    {
        if (val & SDL_HAT_UP)
            return "up";
        else if (val & SDL_HAT_DOWN)
            return "down";
        else if (val & SDL_HAT_LEFT)
            return "left";
        else if (val & SDL_HAT_RIGHT)
            return "right";
        return "neutral?";
    }

    std::string getCECButtonName(int keycode)
    {
        return CECInput::getKeyCodeString(keycode);
    }

    std::string string()
    {
        std::stringstream stream;
        switch (type) {
            case TYPE_BUTTON:
                stream << "Button " << id;
                break;
            case TYPE_AXIS:
                stream << "Axis " << id << (value > 0 ? "+" : "-");
                break;
            case TYPE_HAT:
                stream << "Hat " << id << " " << getHatDir(value);
                break;
            case TYPE_KEY:
                stream << "Key " << SDL_GetKeyName((SDL_Keycode)id);
                break;
            case TYPE_CEC_BUTTON:
                stream << "CEC-Button " << getCECButtonName(id);
                break;
            default:
                stream << "Input to string error";
                break;
        }

        return stream.str();
    }
};

class InputConfig
{
public:
    InputConfig(int deviceId, const std::string& deviceName, const std::string& deviceGUID);

    void clear();
    void mapInput(const std::string& name, Input input);
    void unmapInput(const std::string& name); // Unmap all Inputs mapped to this name.

    inline int getDeviceId() const { return mDeviceId; };
    inline const std::string& getDeviceName() { return mDeviceName; }
    inline const std::string& getDeviceGUIDString() { return mDeviceGUID; }

    // Returns true if Input is mapped to this name, false otherwise.
    bool isMappedTo(const std::string& name, Input input);
    bool isMappedLike(const std::string& name, Input input);

    // Returns a list of names this input is mapped to.
    std::vector<std::string> getMappedTo(Input input);

    // Returns true if there is an Input mapped to this name, false otherwise.
    // Writes Input mapped to this name to result if true.
    bool getInputByName(const std::string& name, Input* result);

    void loadFromXML(pugi::xml_node& root);
    void writeToXML(pugi::xml_node& parent);

    bool isConfigured();

private:
    std::map<std::string, Input> mNameMap;
    const int mDeviceId;
    const std::string mDeviceName;
    const std::string mDeviceGUID;
};

#endif // ES_CORE_INPUT_CONFIG_H