#include <cstdio>
#include <cstring>
#include <cstdlib>

class TravelNetwork
{
 private:
   // Create the Data Members for the Travel Network here
  
 public:
  
 // Use a constructor to initialize the Data Members for Travel Network
 TravelNetwork()
 {
  
 }
  
  
 // The main loop for reading in input
 void processCommandLoop (FILE* inFile)
 {
  char  buffer[300];
  char* input;

  input = fgets ( buffer, 300, inFile );   // get a line of input
    
  // loop until all lines are read from the input
  while (input != NULL)
  {
    // process each line of input using the strtok functions 
    char* command;
    command = strtok (input , " \n\t");

    printf ("*%s*\n", command);
    
    if ( command == NULL )
      printf ("Blank Line\n");
 
    else if ( strcmp (command, "q") == 0) 
      exit(1);
     
    else if ( strcmp (command, "?") == 0) 
      showCommands();
     
    else if ( strcmp (command, "t") == 0) 
      doTravel();
     
    else if ( strcmp (command, "r") == 0) 
      doResize();

    else if ( strcmp (command, "i") == 0) 
      doInsert();

    else if ( strcmp (command, "d") == 0) 
      doDelete();

    else if ( strcmp (command, "l") == 0) 
      doList();

    else if ( strcmp (command, "f") == 0) 
      doFile();

    else if ( strcmp (command, "#") == 0) 
      ;
     
    else
      printf ("Command is not known: %s\n", command);
     
    input = fgets ( buffer, 300, inFile );   // get the next line of input

  }
 }
 
 void showCommands()
 {
   printf ("The commands for this project are:\n");
   printf ("  q \n");
   printf ("  ? \n");
   printf ("  # \n");
   printf ("  t <int1> <int2> \n");
   printf ("  r <int> \n");
   printf ("  i <int1> <int2> \n");
   printf ("  d <int1> <int2> \n");
   printf ("  l \n");
   printf ("  f <filename> \n");
 }
 
 void doTravel()
 {
   int val1 = 0;
   int val2 = 0;

   // get an integer value from the input
   char* next = strtok (NULL, " \n\t");
   if ( next == NULL )
   {
     printf ("Integer value expected\n");
     return;
   }
   val1 = atoi ( next );
   if ( val1 == 0 && strcmp (next, "0") != 0)
   {
     printf ("Integer value expected\n");
     return;
   }
   
   // get another integer value from the input
   next = strtok (NULL, " \n\t");
   if ( next == NULL )
   {
     printf ("Integer value expected\n");
     return;
   }
   val2 = atoi ( next );
   if ( val2 == 0 && strcmp (next, "0") != 0)
   {
     printf ("Integer value expected\n");
     return;
   }
   
   
   printf ("Performing the Travel Command from %d to %d\n", 
            val1, val2);
   
 }
 
 void doResize()
 {
   int val1 = 0;
   
   printf ("Performing the Resize Command with %d\n", val1 );
 

 }
 
 void doInsert()
 {

 }
 
 void doDelete()
 {

 }
 
 void doList()
 {
   
 }
 
 void doFile()
 {
   // get a filename from the input
   char* fname = strtok (NULL, " \n\t");
   if ( fname == NULL )
   {
     printf ("Filename expected\n");
     return;
   }
   
   printf ("Performing the File command with file: %s\n", fname);
   
   // next steps:  (if any step fails: print an error message and return ) 
   //  1. verify the file name is not currently in use
   //  2. open the file using fopen creating a new instance of FILE*
   //  3. recursively call processCommandLoop() with this new instance of FILE* as the parameter
   //  4. close the file when processCommandLoop() returns
 }
};

int main (int argc, char** argv)
{
  // set up the variable inFile to read from standard input
  FILE* inFile = stdin;

  // set up the data needed for the airport adjcency list
  TravelNetwork airportData;
   
  // call the method that reads and parses the input
  airportData.processCommandLoop (inFile);
   
  printf ("Goodbye\n");
  return 1;
 }