#include <iostream.h>
#include <stdio.h>
#pragma hdrstop

#include "airplane.h"

// Constructor performs initialization
Airplane::Airplane(const char* _name, int _type) :
  type(_type), status(ONRAMP), speed(0), altitude(0), heading(0)
{
  switch (type)
  {
    case AIRLINER : ceiling = 35000; break;
    case COMMUTER : ceiling = 20000; break;
    case PRIVATE  : ceiling = 8000;
  }
  name = new char[50];
  strcpy(name, _name);
}

// Destructor performs cleanup.
Airplane::~Airplane()
{
  delete[] name;
}

// Gets a message from the user.
bool Airplane::SendMessage(int msg, char* response,
                           int spd, int dir, int alt)
{
  // Check for bad commands.
  if (spd > 500)
  {
    strcpy(response, "Speed cannot be more than 500.");
    return false;
  }

  if (dir > 360)
  {
    strcpy(response, "Heading cannot be over 360 degrees.");
    return false;
  }

  if (alt < 100 && alt != -1)
  {
    strcpy(response, "I'd crash, bonehead!");
    return false;
  }

  if (alt > ceiling)
  {
    strcpy(response, "I can't go that high.");
    return false;
  }

  // Do something base on which command was sent.
  switch (msg)
  {
    case MSG_TAKEOFF :
    {
      // Can't take off if already in the air!
      if (status != ONRAMP)
      {
        strcpy(response, "I'm already in the air!");
        return false;
      }

      TakeOff(dir);
      break;
    }

    case MSG_CHANGE :
    {
      // Can't change anything if on the ground.
      if (status == ONRAMP)
      {
        strcpy(response, "I'm on the ground");
        return false;
      }

       // Only change if a non-negative value was passed.
      if (spd != -1) speed = spd;
      if (dir != -1) heading = dir;
      if (alt != -1) altitude = alt;

      status = CRUISING;
      break;
    }  // case MSG_CHANGE

    case MSG_LAND :
    {
      if (status == ONRAMP)
      {
        strcpy(response, "I'm already on the ground.");
        return false;
      }

      Land();
      break;
    }  // case MSG_LAND

    case MSG_REPORT : ReportStatus();
  } // switch (msg)

  // Standard reponse if all went well.
  strcpy(response, "Roger.");
  return true;

} // bool Airplane::SendMessage

// Perform takeoff.
void Airplane::TakeOff(int dir)
{
  heading = dir;
  status = TAKINGOFF;
}

// Perform landing.
void Airplane::Land()
{
  speed = heading = altitude = 0;
  status == ONRAMP;
}

// Build a string to report the airplane's status.
int Airplane::GetStatus(char* statusString)
{
  sprintf(statusString, "%s, Altitude: %d, Heading: %d, "
          "Speed: %d\n", name, altitude, heading, speed);
  return status;
}

// Get the status string and output it to the screen.
void Airplane::ReportStatus()
{
  char buff[100];
  GetStatus(buff);
  cout << endl << buff << endl;
}