#ifndef LIBRARY_INTERNAL_H
#define LIBRARY_INTERNAL_H

#include "EventType.h"
#include "KeyCode.h"
#include "LayoutVersion.h"
#include "GraphicMode.h"
#include "Color.h"

/**
 * the Control Registers
 * @author Julian Hinxlage
 * @since 0.1.0
 */
struct Registers{
    int layout_version;
    int trigger_reset;
    int width_pixels;
    int height_pixels;
    GraphicMode graphicMode;
    int autoRedrawInterval;
    int timerInterruptInterval;
    Color background_color;
    Color foreground_color;
    int characters_per_row;
    int characters_per_column;
    int textMode_font;
    int textMode_font_width;
    int textMode_font_height;
    int mouse_pos_x;
    int mouse_pos_y;
    char keyboardBuffer[16];
    int keyboardBuffer_index_w;
    int keyboardBuffer_index_r;
};

struct InterruptEntry{
    int pid;
    int signum;
};

/**
 * internal values for the library.
 */
struct Internal{
    int sharedMemoryPid;
};
extern Internal internal;

/**
 * set layout version.
 * @param newValue new layout version number.
 */
void setLayoutVersion(LayoutVersion newValue);

/**
 * set characters per line for current font.
 * @param newValue characters per line.
 */
void setCharactersPerLine(int newValue);

/**
 * set characters per row for current font.
 * @param newValue
 */
void setCharactersPerRow(int newValue);

/**
 * call a specific event.
 * @param type
 * @return true if there is a handler registered.
 */
bool callEvent(EventType type);

/**
 * set mouse position to x,y value.
 * @param x x coordinate
 * @param y y coordinate
 */
void setMousePosition(int x, int y);

/**
 * register pressed button.
 * @param keyCode pressed key.
 */
void buttonPressed(KeyCode keyCode);

// Shared Memory Layout
// --------------------------------------------------------------------
// struct ControlRegisters
// char reserved[1024]
// Interrupt Vector Table [64]
// text area [max_textMode_width * max_textMode_height]
// pixel area [max_height_pixels * max_height_pixels * sizeof(uint_32)]


#endif