/***************************************************************************
* file: client.c
*
* This file contains the client code for the room reservation application.
****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


#include "room_res.h"     /* the header file created by the IDL compiler */


/**************************************************************************
* function: main
* returns:  int
*
* This is the main function for the room reservation application.  The
* only thing it does is parse the command line and then call the 
* appropriate command.  Everything else happens at the server end.
**************************************************************************/
int main (int argc, char *argv[]) 
{ 

   int         count = 1;
   char        *char_ptr;

   char        description[MAX_STRING];
   char        name[MAX_STRING];
   int         length = 1;
   long        result;
   int         okayToReserve = 1;	
   int         okayToCancel = 1;
   roomnum_t   room_num = -1;
   date_t      date = 0;
   restime_t   time = 0;
   int         listRooms = FALSE;
   int         cancelRoom = FALSE;
   int         num_people = 0;	
   int         i = 0;

   listOut_t   outBuffer;


	/********************************
	* Initialize the local storage 
    * arrays and the server.
	*********************************/

    InitServer();   /* This is a remote procedure call */

	for (i = 0; i < 256; i++)
	{
		description[i] = '\0';
		name[i] = '\0';
	}	


   /*****************************
   * Parse the command line
   ******************************/

   char_ptr = argv[count];

	if (argc > 1) 
	{
		while (count < argc)
		{
			char_ptr++;
     		switch (*char_ptr) 
			{

           	case 'r':
						count++;
						char_ptr = argv[count];
						room_num = atoi (argv[count]);
              		break;


				case 'd':
						count++;
						char_ptr = argv[count];
						date = atoi (argv[count]);
						break;

				case 't':
						count++;
						char_ptr = argv[count];
						time = atoi (argv[count]);	
						break;

				case 'n':
						count++;
						char_ptr = argv[count];
						num_people = atoi (argv[count]);
						break;

				case 'l':
						count++;
						char_ptr = argv[count];
						length = atoi (argv[count]);
						break;

				case 'm':
						count++;
						strcpy (description, argv[count]);
						break;
					
				case 'w':
						count++;
						strcpy (name, argv[count]);
						break;	

				case 'L':
						listRooms = TRUE;		
						break;

				case 'C':
						cancelRoom = TRUE;
						break;							

			}
			count++;
			char_ptr = argv[count];
		}
	}

   char_ptr = argv[count];


   /*********************************************
   * Check to make sure all necessary args
   * are present, then call requested function. 
   **********************************************/

    /**********************
    * Make a reservation
    ***********************/
   if (!listRooms && !cancelRoom)
   {
      if (!date)
      {
         fprintf (stderr, "Error!! Date must be specified ");
         fprintf (stderr, "using -d flag\n");
         fflush (stderr);
         okayToReserve = 0;
      }

      if (!time)
		{
         fprintf (stderr, "Error!! Time must be specified ");
         fprintf (stderr, "using -t flag\n");
         fflush (stderr);
         okayToReserve = 0;
      }
	
      if (!num_people)
      {
         fprintf (stderr, "Error!! Number of people must be specified ");
         fprintf (stderr, "using -n flag\n");
         fflush (stderr);
         okayToReserve = 0;
      }
	
      if (name[0] == '\0')
      {
         fprintf (stderr, "Error!! A name must be specified ");
         fprintf (stderr, "using -w flag\n");
         fflush (stderr);
         okayToReserve = 0;
      }

      if (description[0] == '\0')
      {
         fprintf (stderr, "Error!! A description must be specified ");
         fprintf (stderr, "using -m flag\n");
         fflush (stderr);
         okayToReserve = 0;
      }


      if (okayToReserve)  /* do the remote procedure call */
      {	
         result =  ReserveRoom (time, date, num_people, room_num, length, 
                                name, description, outBuffer);
         printf ("%s\n", outBuffer);  
      }
   }


    /************************
    * Cancel a reservation
    *************************/
   if (cancelRoom)
   {
      if (room_num == (-1) )
      {
         fprintf (stderr, "Error!! The room number to cancel must be ");
         fprintf (stderr, "specified using -r flag\n"); 
         fflush (stderr);
         okayToCancel = 0;
      }

      if (!date)
      {
         fprintf (stderr, "Error!! Date must be specified ");
         fprintf (stderr, "using -d flag\n");
         fflush (stderr);
         okayToCancel = 0;	
      } 

      if (!time)
      {
         fprintf (stderr, "Error!! Time must be specified ");
         fprintf (stderr, "using -t flag\n");
         fflush (stderr);
         okayToCancel = 0;
      }
		
      if (okayToCancel)
      {	
         result = Cancel (room_num, date, time, outBuffer); 
         printf ("%s\n", outBuffer);
         
      }

   }

   /****************** 
   * List the rooms 
   *******************/

   if (listRooms && (room_num > 0) && !date && !time)
   {
      ListReservationsByRoom (room_num, outBuffer);
      printf ("%s\n", outBuffer);
   }
   else if (listRooms)
   {
      ListReservations (date, room_num, outBuffer); 
      printf ("%s\n", outBuffer);
   }
	


   /**********************
   * Clean up the Server
   ***********************/

   ShutDown (); 

   return 0;

}