#ifndef __SIMULATEDHARDDISK_H__
#define __SIMULATEDHARDDISK_H__

#include <afxwin.h>  // DWORD WINAPI

/**
@class SimulatedHardDisk

@author Stan Birchfield (STB)
*/

class SimulatedHardDisk
{
public:

  // number of bytes in a sector
  enum { SHD_SECTOR_SIZE = 256 };

  // parameter indicates whether write (true) or read (false) has finished
  typedef void (*InterruptHandler)(bool write);

  // create a file on the real hard disk to contain a simulated hard disk
  // 'real_filename':  name of the real file
  // 'total_size':  size of the file in bytes
  static void FormatHardDisk(const char* real_filename, int total_size);

  SimulatedHardDisk();
  ~SimulatedHardDisk();

  // set the device name 
  // (i.e., the name of the real file that contains the simulated hard disk)
  bool SetDevice(const char* real_filename);

  // get the device name
  // (i.e., the name of the real file that contains the simulated hard disk)
  // returns the empty string if no device has been set
  const char* GetDevice() const;

  // set the function to be called whenever a read or write is complete
  void SetInterruptHandler(InterruptHandler interrupt_handler);

public:
  // to read or write bytes, follow these steps:
  //   1.  set 'sector' to the sector number
  //   2.  set 'read' or 'write' to true
  //   3.  the read or write will begin
  //   4.  when the read or write is complete, the interrupt handler will be called (if set).
  //       However, 'write' and 'read' will NOT be set to false automatically.  You will need
  //       to do this yourself in the interrupt handler, or another write/read will be initiated automatically.
  int sector;
  bool write, read;
  unsigned char buffer[ SHD_SECTOR_SIZE ];

// protected:
//  virtual void Interrupt(bool write) = 0;

private:
  static DWORD WINAPI ThreadProc(LPVOID lpParameter);
  void MainLoop();

  struct Data;
  Data* m_data;
};

#endif // __SIMULATEDHARDDISK_H__