//============================================================================
//
//   SSSS    tt          lll  lll
//  SS  SS   tt           ll   ll
//  SS     tttttt  eeee   ll   ll   aaaa
//   SSSS    tt   ee  ee  ll   ll      aa
//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
//  SS  SS   tt   ee      ll   ll  aa  aa
//   SSSS     ttt  eeeee llll llll  aaaaa
//
// Copyright (c) 1995-2017 by Bradford W. Mott, Stephen Anthony
// and the Stella Team
//
// See the file "License.txt" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//============================================================================

#ifndef CPU_DEBUG_HXX
#define CPU_DEBUG_HXX

#include "M6502.hxx"
#include "System.hxx"
#include "DebuggerSystem.hxx"

// Function type for CpuDebug instance methods
using CpuMethod = int (CpuDebug::*)() const;

class CpuState : public DebuggerState
{
  public:
    int PC, SP, PS, A, X, Y;
    int srcS, srcA, srcX, srcY;
    BoolArray PSbits;
};

class CpuDebug : public DebuggerSystem
{
  public:
    CpuDebug(Debugger& dbg, Console& console);

    const DebuggerState& getState() override;
    const DebuggerState& getOldState() override { return myOldState; }

    void saveOldState() override;
    string toString() override { return EmptyString; } // Not needed, since CPU stuff is always visible

    // I know, we ain't supposed to do this...
    M6502& m6502() const { return mySystem.m6502(); }

    int pc() const { return mySystem.m6502().PC; }
    int sp() const { return mySystem.m6502().SP; }
    int a()  const { return mySystem.m6502().A;  }
    int x()  const { return mySystem.m6502().X;  }
    int y()  const { return mySystem.m6502().Y;  }

    // These return int, not boolean!
    int n() const { return mySystem.m6502().N;     }
    int v() const { return mySystem.m6502().V;     }
    int b() const { return mySystem.m6502().B;     }
    int d() const { return mySystem.m6502().D;     }
    int i() const { return mySystem.m6502().I;     }
    int z() const { return !mySystem.m6502().notZ; }
    int c() const { return mySystem.m6502().C;     }

    void setPC(int pc);
    void setSP(int sp);
    void setPS(int ps);
    void setA(int a);
    void setX(int x);
    void setY(int y);

    void setN(bool on);
    void setV(bool on);
    void setB(bool on);
    void setD(bool on);
    void setI(bool on);
    void setZ(bool on);
    void setC(bool on);

    void toggleN();
    void toggleV();
    void toggleB();
    void toggleD();
    void toggleI();
    void toggleZ();
    void toggleC();

  private:
    M6502& my6502;

    CpuState myState;
    CpuState myOldState;

  private:
    // Following constructors and assignment operators not supported
    CpuDebug() = delete;
    CpuDebug(const CpuDebug&) = delete;
    CpuDebug(CpuDebug&&) = delete;
    CpuDebug& operator=(const CpuDebug&) = delete;
    CpuDebug& operator=(CpuDebug&&) = delete;
};

#endif
