#ifndef MACHINE_H
#define MACHINE_H

#include <cstdint>

#include "Device.h"

const int MAX_ADDRESS = 0xFFFFF;
const int MAX_DEVICES = 256;

class Machine {
   private:
    uint8_t memory[MAX_ADDRESS + 1];
    Device* devices[MAX_DEVICES];

    // registers
    int A;     // Accumulator (24-bit)
    int X;     // Index (24-bit)
    int L;     // Linkage (24-bit)
    int B;     // Base (24-bit)
    int S;     // General purpose (24-bit)
    int T;     // General purpose (24-bit)
    double F;  // Floating point accumulator (48-bit)
    int PC;    // Program Counter (24-bit)
    int SW;    // Status Word (24-bit)

   public:
    Machine();
    ~Machine();

    // getters
    int getA() const;
    int getX() const;
    int getL() const;
    int getB() const;
    int getS() const;
    int getT() const;
    double getF() const;
    int getPC() const;
    int getSW() const;

    // setters
    void setA(int val);
    void setX(int val);
    void setL(int val);
    void setB(int val);
    void setS(int val);
    void setT(int val);
    void setF(double val);
    void setPC(int val);
    void setSW(int val);

    // condition codes for SW
    void setCC_less();
    void setCC_equal();
    void setCC_greater();
    int getCC() const;

    // 0=A, 1=X, 2=L, 3=B, 4=S, 5=T, 6=F, 8=PC, 9=SW
    int getReg(int reg) const;
    void setReg(int reg, int val);

    int getByte(int addr) const;
    void setByte(int addr, int val);
    
    int getWord(int addr) const;
    void setWord(int addr, int val);

    Device* getDevice(int num) const;
    void setDevice(int num, Device* device);
};

#endif  // MACHINE_H