#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
using namespace std;

// Function prototypes
bool validFilename(const string filename);
void readData(Roster[] &MyRoster, const int lines, ifstream &fp);
void sortData();
int isPie();
int isCake();
void sortArray();
void printReport();

// Structs

struct Roster {
  string LName;
  string FName;
  char Cheesecake;
};
struct Roster * MyRoster;

// Illegal characters for file names, according to the NTFS specification
// Characters ranging from dec 1 through 31 inclusive are not listed here
// for brevity.
const char illegalchars[] = { '"', '*', ':', '<', '>', '?', '\\', '/', '|' };

int main (void){

	char filename[80];
	ifstream file;

	// Some bool variables for the do while input loop
	bool isvalid = true; // Will change to false if failing the first loop
	bool isopened = false;
	bool failedopen = false;

	do {
    if ( failedopen ){
      cout << "There was an error opening the file." << endl;
    }
    isvalid = true; // Reset for each loop

    cout << "Enter filename: ";
    cin.width(80);
    cin >> filename;

    isvalid = validFilename(filename);

    // If the filename is valid, try to open the file
    if(isvalid){
      file.open(filename);

      if ( file.fail() ){
        // File was not opened
        isopened = false;
      }
      else {
        // File was opened;
        isopened = true;
      }
    }
  } while ( !isvalid || !isopened );

	// Count the number of lines to determine how much space to allocate for array
	int lines;
	while ( file.getline() ){
    lines++;
  }

	// Close file
	file.close();

	// Dynamically allocate an array with exactly the amount of storage required
	// to hold the records.
	MyRoster = new Roster[lines];

	// Open the file and read it into the array
	file.open(filename, 'r');
	readData(MyRoster, file, lines);

	// Sort the array by last name in ascending order

	// Output the array records

	// Output the summary

	// Output the number of participants

	// Check that the votes for either cheesecake or pie add up to the total number of votes


}

/* Function to valid filename
 *
 * Arguments: filename string
 *
 * Returns false if any character in the filename string matches any chracter
 * in the illegalchars array, or if any character in the filename is an
 * ASCII character between 1 and 31.
 */
bool validFilename(const string filename){
  for (int i = 0 ; i < filename.length() ; i++){
    // First check against array
    for (int j = 0 ; j < 9 ; j++){
      if( filename.at(i) == illegalchars[j] ){
        return false;
      }
    }
    // Then check to see if the character is an ASCII character between 1 and 31
    if ( (int) filename > 0 && (int) filename < 32 ){
      return false;
    }
  }
  // Since nothing matched, string is good.
  return true;
}

void readData(const Roster[] &MyRoster, const int lines, ifstream &fp){
  for(int i=0 ; i < lines - 1; i++){
    fin >> MyRoster[i].LName;
    fin >> MyRoster[i].FName;
    fin >> MyRoster[i].Cheesecake;
  }
}