//============================================================================
//
//   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) 1995-2021 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 DEBUGGER_SYSTEM_HXX
#define DEBUGGER_SYSTEM_HXX

class Debugger;

#include "Console.hxx"

/**
  The DebuggerState class is used as a base class for state in all
  DebuggerSystem objects.  We make it a class so we can take advantage
  of the copy constructor.
 */
class DebuggerState
{
  public:
    DebuggerState()  = default;
    virtual ~DebuggerState() = default;

    DebuggerState(const DebuggerState&) = default;
    DebuggerState(DebuggerState&&) = delete;
    DebuggerState& operator=(const DebuggerState&) = default;
    DebuggerState& operator=(DebuggerState&&) = delete;
};

/**
  The base class for all debugger objects.  Its real purpose is to
  clean up the Debugger API, partitioning it into separate
  subsystems.
 */
class DebuggerSystem
{
  public:
    DebuggerSystem(Debugger& dbg, Console& console) :
      myDebugger(dbg), myConsole(console), mySystem(console.system()) { }
    virtual ~DebuggerSystem() = default;

    virtual const DebuggerState& getState() = 0;
    virtual const DebuggerState& getOldState() = 0;

    virtual void saveOldState() = 0;
    virtual string toString() = 0;

  protected:
    Debugger& myDebugger;
    Console& myConsole;
    System& mySystem;

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

#endif