#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <string.h>
#define SEATS 12

typedef struct
{
	int seat;
	char first[20];
	char last[20];
	char taken;
}Seating;

void SelectionA(Seating *A);
void SelectionB(Seating *A);
void SelectionC(Seating *A);
void SelectionD(Seating *A);
void SelectionE(Seating *A);
void SelectionF(Seating *A);
void file(Seating *A);

int main(void)
{



	Seating Plan[SEATS];
	int index;
	file(Plan);
	char input;



	do{

	system("cls");

	printf("\t\tECONO-AIRLINES\t\t");
	puts("");
	printf("a.\t Display ALL seat assignment(including Empty)\n");
	printf("b.\t Show ONLY a list of empty seats and show total of empty seats\n");
	printf("c.\t Show ONLY the assigned seats with name of person and total assigned.\n");
	printf("d.\t Assign the customer to an empty seat.\n");
	printf("e.\t Delete ONE seat assignment.\n");
	printf("f.\t Delete ALL seat assignments.\n");
	printf("q.\t Quit Program.\n\n");
	printf("Input your choice? ");

	scanf("%c",&input);
	fflush(stdin);

	switch(input)
	{
		case 'a' :
		system("cls");
		SelectionA(Plan);
		system("pause");
		break;
		case 'b' :
		system("cls");
		SelectionB(Plan);
		system("pause");
		break;
		case 'c' :
		system("cls");
		SelectionC(Plan);
		system("pause");
		break;
		case 'd' :
		system("cls");
		SelectionD(Plan);
		system("pause");
		break;
		case 'e' :
		system("cls");
		SelectionE(Plan);
		system("pause");
		break;
		case 'f' :
		system("cls");
		SelectionF(Plan);
		system("pause");
		break;


	}}while(input != 'q');




	system("pause");
	return (0);

}


void SelectionA(Seating *Plan)
{




	int index;
	int available = 0;
	FILE *fptr;

	printf("\t\t\tSeating Arrangement\n\n");
	printf("\tSeat #\t\t\tUsed\t\t\t LastName\t\t FirstName\n");
	puts("");

	fptr = fopen("plane1.DAT", "rb");

	for(index=0; index < SEATS; index++)
	{
		fread(&Plan[index], sizeof(Seating), 1, fptr);
		printf("\t   %i\t\t\t %c\t\t\t %s\t\t\t %s\n",Plan[index].seat, Plan[index].taken, Plan[index].last, Plan[index].first);
		if (Plan[index].taken == 'n')
		available += 1;
	}

	printf("\nThere are %i Empty Seats.",available);
	fclose(fptr);



}


void SelectionB(Seating *Plan)
{


	int index;
	int available = 0;
	FILE *fptr;

	printf("\t\t\tSeating Arrangement\n\n");
	printf("\tSeat #\t\t\tUsed\t\t\t LastName\t\t\t FirstName\n");
	puts("");

	fptr = fopen("plane1.DAT", "rb");

	for(index=0; index < SEATS; index++)
	{
		fread(&Plan[index], sizeof(Seating), 1, fptr);
		if(Plan[index].taken == 'n')
		{
		printf("\t   %i\t\t\t %c\t\t\t %s\t\t\t\t %s\n",Plan[index].seat, Plan[index].taken, Plan[index].last, Plan[index].first);
		available+=1;
	}

	}

	printf("\nThere are %i Empty Seats.",available);
	fclose(fptr);




}


void SelectionC(Seating *Plan)
{

	int index;
	int available = 0;
	FILE *fptr;

	printf("\t\t\tSeating Arrangement\n\n");
	printf("\tSeat #\t\t\tUsed\t\t\t LastName\t\t\t FirstName\n");
	puts("");
	fptr = fopen("plane1.DAT", "rb");
	for(index = 0; index < SEATS; index ++)
	{
		fread(&Plan[index], sizeof(Seating), 1, fptr);
		if(Plan[index].taken == 'y')
		{
		printf("\t   %i\t\t\t %c\t\t\t %s\t\t\t\t %s\n",Plan[index].seat, Plan[index].taken, Plan[index].last, Plan[index].first);
		available += 1;
	}
	}

	printf("\nThere are %i ASSIGNED Seats.", available);
	fclose(fptr);

}

void SelectionD(Seating *Plan)
{



	int index;
	int available = 0;
	int choice;
	FILE *fptr;
	printf("The following seats are available -\n");
	fptr = fopen("plane1.DAT", "rb");

	for(index = 0; index < SEATS; index ++)
	{
		if(Plan[index].taken == 'n')
		{
		available += 1;
		printf("\t\n   %i",Plan[index].seat);
		}
	}


	printf("\nThere are %i Available Seats\n\n",available);

	printf("Which seat would you like (0 to exit)?");
	scanf("%i",&choice);
	fflush(stdin);


	if(choice == 0)
	{
		system("cls");
		fflush(stdin);
		return;
	}
	else{

	Plan[choice-1].seat = choice;
	Plan[choice-1].taken = 'y';
	printf("Input last name? \n");
	gets(Plan[choice-1].last);
	printf("Input first name? \n");
	gets(Plan[choice-1].first);

	fptr = fopen("plane1.DAT", "wb");
	for (index = 0; index< SEATS; index ++)
	{
	fwrite(&Plan[index], sizeof(Seating), 1, fptr);
	}


}
 fclose(fptr);
}


void SelectionE(Seating *Plan)
{
	int index;
	int choice;
	int taken=0;
	FILE *fptr;



	printf("Here are the seats you can delete.\n");

	for(index=0; index < SEATS; index++)
	{
		if(Plan[index].taken == 'y')
		{
			taken += 1;
			printf("\n\t%i\t%s\t\t%s\n",Plan[index].seat, Plan[index].last, Plan[index].first);
		}
	}

	printf("\nWhich seat would you like to delete(0 to exit) ");
	scanf("%i",&choice);

	(Plan + choice - 1)->taken = 'n';
	strcpy 	((Plan + choice - 1)->first, "SEAT");
	strcpy 	((Plan + choice - 1)->last, "EMPTY");
	fptr = fopen("plane1.DAT", "wb");
	for (index = 0; index< SEATS; index++)
	{
	fwrite(&Plan[index], sizeof(Seating), 1, fptr);
	}
	fclose(fptr);


	getchar();
}

	void SelectionF(Seating *Plan)
{
	int index;
	int choice;
	int taken=0;
	FILE *fptr;


	printf("Are you sure you would like to delete all seats? (y/n)");
	scanf(" %c",&choice);


	if(choice == 'y')
	{
		fptr = fopen("plane1.DAT", "wb");
	for(index = 0; index < SEATS; index++)
			{
					Plan[index].seat = index+1;
					Plan[index].taken = 'n';
					strcpy (Plan[index].first, "SEAT");
					strcpy (Plan[index].last, "EMPTY");
					fwrite(&Plan[index], sizeof(Seating), 1, fptr);
			}
			printf("All assigned seating have been deleted\n");
			fclose(fptr);
	}
	if(choice == 'n')
	{
		exit;
	}

}


void file(Seating *Plan)
{
int index;

	FILE *fptr;

	fptr = fopen("plane1.DAT", "rb");

	if (fptr != NULL)
	{
	fclose(fptr);
	}


	else
{
fptr = fopen("plane1.DAT", "wb");
for (index = 0; index < SEATS; index ++)
	{
		Plan[index].seat = index+1;
		Plan[index].taken = 'n';
		strcpy (Plan[index].last, "EMPTY");
		strcpy (Plan[index].first, "SEAT");
		fwrite(&Plan[index], sizeof(Seating), 1, fptr);
	}
	fclose(fptr);

}

}