/*
Sean McGuire,	G00330886.
Rugby Assignment.
*/

#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif

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

// define struct
struct node
{
	int IRFU;
	char firstName[20];
	char secondName[20];
	int age;
	float height;
	float weight;
	char club[20];
	char email[30];
	char pos[10];
	int tacklesMissed;
	int meters;

	struct node* NEXT;
};

void menu();
void parseChoice(int choice);
void addPlayer(struct node* headptr, int newIRFU);
void addElement_AtStart(struct node** head_ptr, int newIRFU);
void displayPlayers(struct node* headptr);
void displayPlayersDetails(struct node* headptr);
int search(struct node* headptr, int IRFU);

void main()
{
	// Initialize all local variables.
	char buffer[256] = { 0 };
	char username[6];
	char password[6];
	char c;
	char line[1000];
	int pos = 0;
	int found = 0;
	int lineNumber = 1;
	int choice;
	// Declare and open the files used.
	FILE * fp;
	fp = fopen("users.txt", "r");

	// Firstly, ask the user for their username, if it's valid, it will ask for their password.
	printf("Enter username: ");
	scanf("%s", username);

	// Enter this while loop for every line the file has,
	// The file contains a list of usernames followed by their passwords directly after.
	while (fgets(line, sizeof(line), fp))
	{
		lineNumber++;
		// Each line ends with an end of line \n, so using strtok removes it, allowing strcmp to compare the strings
		strtok(line, "\n");
		// Check if the username entered is equal to the current lines string,
		// And make sure the line number is divisible by 2 as the usernames  in the file are always followed by the password.
		if (strcmp(username, line) == 0 && lineNumber % 2 == 0)
		{
			// If a username is found, call fgets to move to the next line, call strtok again, and assign the password to the current line.
			fgets(line, sizeof(line), fp);
			strtok(line, "\n");
			strcpy(password, line);
			// Then print that it was found, and break the while loop.
			printf("\nusername found, Please Enter password: ");
			found += 1;
		}
	}

	if (found == 0)
	{
		printf("\nnot found\n");
		main();
	}
	// Enter the do while loop for the password
	do {
		c = _getch();
		// Check if the character entered is a valid char, and for that character, print a "*" character.
		if (isprint(c))
		{
			buffer[pos++] = c;
			printf("%c", '*');
		}
		else if (c == 8 && pos)
		{
			buffer[pos--] = '\0';
			printf("%s", "\b \b");
		}
	} while (c != 13);
	// If the buffer and password are equal, print a succesfull login, and call other methods
	if (!strcmp(buffer, password))
	{
		printf("\n%s\n", "Logged on succesfully!");

		//###########################################
		menu();
		scanf("%d", &choice);
		parseChoice(choice);


	}
	else
	{
		printf("\n%s\n", "Incorrect login!, Please try again");
		main();
	}

	fclose(fp);
	_getch();
}

void menu()
{
	printf("\n1) Add Player");
	printf("\n2) Display Players");
	printf("\n3) Display Players Details");
	printf("\n4) Update a Player’s statistic");
	printf("\n5) Delete a Player");
	printf("\n6) Generate Statistics");
	printf("\n7) Print Players Details to File");
	printf("\n8) Display Players order of Height");
	printf("\n9) Exit the program\n");

}

void parseChoice(int choice)
{
	int newIRFU = 0;
	struct node* head_ptr;
	int option = 0;

	head_ptr = NULL;

	if (choice != 0 || choice > 0)
	{
		switch (choice)
		{
		case 1:
			printf("\nAdding Player...");
			printf("\nPlease Enter new IRFU Number: ");
			scanf("%d", &newIRFU);

			if (head_ptr == NULL)
			{
				addElement_AtStart(&head_ptr, newIRFU);
			}
			else
			{
				if (!(search(head_ptr, newIRFU) == 1))
				{
					addPlayer(head_ptr, newIRFU);
				}
				else
				{
					printf("\nThis Player already exists\n");
				}
			}

			break;
		case 2:
			printf("\nDisplaying Players");
			displayPlayers(head_ptr);
			break;
		case 3:
			printf("\nDisplaying Players Details");
			displayPlayersDetails(head_ptr);

			break;
		case 4:
			printf("\nUpdating Players stats");
			break;
		case 5:
			printf("\nDeleting a Player");
			break;
		case 6:
			printf("\nGeneraing stats");
			break;
		case 7:
			printf("\nPrinting Players to File...");
			break;
		case 8:
			printf("\nDisplaying Players in order of Height\n");
			break;
		case 9:
			printf("\nExiting\n");
			exit(0);
			break;
		default:
			printf("\nInvalid\n");
			menu();
			scanf("%d", &choice);

			parseChoice(choice);
			break;
		}

		menu();
		scanf("%d", &choice);

		parseChoice(choice);
	}
	else
	{
		printf("\nInvalid\n");
		menu();
		scanf("%d", &choice);
		parseChoice(choice);
	}


}

void addPlayer(struct node* headptr, int newIRFU)
{
	char email[25];
	int found = 0;

	// add to end
	struct node *temp;
	temp = (struct node*)malloc(sizeof(struct node));
	temp = headptr;

	while (temp->NEXT != NULL) // go to the last node
	{
		temp = temp->NEXT;
	}

	struct node *newNode;
	newNode = (struct node*)malloc(sizeof(struct node));

	newNode->IRFU = newIRFU;

	printf("Please Enter The First Name: ");
	scanf("%s", newNode->firstName);
	printf("Please Enter The Last Name: ");
	scanf("%s", newNode->secondName);
	printf("Enter the Age: ");
	scanf("%d", &newNode->age);
	printf("Please Enter the Height: ");
	scanf("%f", &newNode->height);
	printf("Please Enter the Weight: ");
	scanf("%f", &newNode->weight);
	printf("Please Enter the Name of the club: ");
	scanf("%s", newNode->club);
	printf("Please Enter the Email of the Player: ");
	scanf("%s", newNode->email);

	newNode->NEXT = NULL;
	temp->NEXT = newNode;
}


void addElement_AtStart(struct node** head_ptr, int newIRFU)
{
	char email[25];
	int found = 0;

	//Create new node and populate it with data
	struct node *newNode;

	newNode = (struct node*)malloc(sizeof(struct node));
	newNode->IRFU = newIRFU;

	printf("Enter The First Name: ");
	scanf("%s", newNode->firstName);
	printf("Enter The Last Name: ");
	scanf("%s", newNode->secondName);
	printf("Enter the Age: ");
	scanf("%d", &newNode->age);
	printf("Enter the Height: ");
	scanf("%f", &newNode->height);
	printf("Enter the Weight: ");
	scanf("%f", &newNode->weight);
	printf("Enter the Name of the club: ");
	scanf("%s", newNode->club);
	printf("Enter the Email of the Player: ");
	scanf("%s", newNode->email);

	//Connect up the node so that the new node is the headpointer
	newNode->NEXT = *head_ptr;
	*head_ptr = newNode;
}

void displayPlayers(struct node* headptr)
{
	printf("\nPrinting all the players\n");
	struct node *temp;
	temp = (struct node*)malloc(sizeof(struct node));
	temp = headptr;

	if (headptr != NULL) {
		printf("All Player Details\n");
		printf("Player Name	 IRFU	 Age	Height	Weight	  Club	Email\n");
	}

	while (temp != NULL)
	{
		printf("%-7s %-7s  %-7d %-2d  %6.2f %8.2f %13s %18s ", temp->firstName, temp->secondName, temp->IRFU, temp->age, temp->height, temp->weight, temp->club, temp->email);
		temp = temp->NEXT;
	}
}

void displayPlayersDetails(struct node* headptr)
{
	printf("\nPrinting all the players details\n");
	struct node *temp;
	temp = (struct node*)malloc(sizeof(struct node));

	temp = headptr;

	while (temp != NULL)
	{
		printf("The IRFU is: %d\n", temp->IRFU);
		printf("The name is: %s %s\n", temp->firstName, temp->secondName);
		printf("The age is: %d\n", temp->age);
		printf("The height is: %f\n", temp->height);
		printf("The weight is: %f\n", temp->weight);
		printf("The weight is: %f\n", temp->weight);

		temp = temp->NEXT;
	}
}

int search(struct node* headptr, int IRFU)
{
	struct node *temp;
	int found = 0;

	//serach all the values in the linked list
	temp = headptr;
	while (temp != NULL)
	{
		//if found return 1 if not return 0
		if (temp->IRFU == IRFU) {
			found = 1;
		}

		temp = temp->NEXT;
	}

	return found;

}