#define _CRT_SECURE_NO_WARNINGS
//-------------------------------//
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <ctype.h>
 
//----------------Structure array--------------//
typedef struct stam{
	char name[30];
	char ID[10];
	char address[30];
	int adults, children; // erkev mishpaha
	double fee;  // dmey manuyot 
}subscriber; 
//--------------structure array---------------//
 
 
//-----------All Function declearations---------------//
subscriber* add_subscribers(subscriber * club, int * size);
subscriber *del_subscriber(subscriber *club, int *size, char *id);
void  print_subscribers (subscriber * club, int size);
void id_sorting(subscriber * club, int size);
void  fee_sorting(subscriber * club, int size);
void menu();
//---------------All Function declearations------------//
 
 
 
//-------------------------------*****VOID MAIN - MAIN FUNCTION*****-------------------------------//
void main()
{
	//---Declearation of Variables--//
	int option, size = 0, count = 1;
	char id[10];
	subscriber *subs = NULL;
	//-----------------------------//
 
	while(1)
	{
		printf("\tWelcome To Pool Club!\n\n");
		menu(); // MENU FOR USER
 
		scanf("%d", &option);
		switch(option)
		{
		case(1):        // Option 1 - Add Subscriber
			{
				subs = add_subscribers(subs, &size);                 
				break;
			}
		case(2):       // Option 2 - Delete Subscriber
			{
				fflush(stdin);     //for Solving the conflict of SCANF and GETS in one function 
				printf("Enter ID for deleting\n");
				gets(id);
				subs = del_subscriber(subs, &size, id);
				break;
			}
		case(3):     // Option 3 - Print Subscribers
			{
				print_subscribers (subs, size);
 
				break;
			}
		case(4):     // Option 4 - Sort By ID
			{
				id_sorting(subs, size);
				break;
			}
		case(5):     // Option 5 - Sort By Fee
			{
				fee_sorting(subs, size);
				break;
			}
		case(6):    // Option 6 - Exit from Program
			{
				exit(1);
			}
		default:
				printf("Invaild option has been entered, Try again!\n"); //if the option is not in the range (1 - 6)
				break;
		}
 
	}
}
//------------------------------------------------------*****END VOID MAIN - MAIN FUNCTION*****----------------------------------------------//
 
 
 
//-------------------!!!!!!!!!!!!!!!!!First Function - Add Subscribers!!!!!!!!!!!!!!!!!------------------------------------------------------//
subscriber* add_subscribers(subscriber * club, int * size)
{
	//----------Declearations of function 2-------//
	int i, newsize = 0, scount = 1, j = 0;
    subscriber *newsubs;
	//-------------------------------------------//
 
	printf("Enter number of subscribers for adding:\n");
	do
	{
		scanf("%d", &newsize);                    //Entering buffer size for enterig new subscribers to.
 
		newsubs = (subscriber*)malloc(sizeof(subscriber)*(*size+newsize));           //Creating dynamic buffer for subscribers.
 
	}while ((newsubs == NULL)&&printf("Memory allocation failed! - Not enough memory in system, enter smaller number!:\n\n"));   //Cheacking if dynamic mem aloc is succeed.
 
	//---------------Loop for filling (dynamic array) information for subscribers-----------------------------//
	for (i = 0; i < newsize; i++)
	{
		printf("Please Enter the folowing information for the subscriber [%d]:\n\n", scount);     
		fflush(stdin);
		printf("Enter Name of subscriber:\n");
		gets(newsubs[i].name);
		printf("Enter Address of subscriber:\n");
		gets(newsubs[i].address);
		printf("Enter ID of subscriber:\n");
		gets(newsubs[i].ID);
		printf("Enter number of adults of subscriber:\n");
		scanf("%d", &newsubs[i].adults);
		printf("Enter number of children of subscriber:\n");
		scanf("%d", &newsubs[i].children);
 
		newsubs[i].fee = ((newsubs[i].adults*2000) + (newsubs[i].children*900));
		printf("The fee of subscriber is: %.1lf\n\n", newsubs[i].fee);
		scount++;
	}
	//--------------------------------------------------------------------------------------------------------//
 
	//---------------------------Loop for copying the old buffer to new allocated buffer---------------------//
	for (i = newsize; i < *size+newsize; i++)
	{
		newsubs[i] = club[j];
		j++;
	}
	//-------------------------------------------------------------------------------------------------------//
 
	//------------------------------------------Free the old buffer and return the new one-------------------//
	free(club);
	*size = *size+newsize;
 
	return newsubs;
	//-------------------------------------------------------------------------------------------------------//
}
//-----------------------------------!!!!!End First Function!!!!!!-----------------------------------//
 
 
 
 
//----------------------------!!!!!!FUNCTION TWO - DELETING SUBSCRIBERS!!!!!!!-------------------------------//
subscriber *del_subscriber(subscriber *club, int *size, char *id)
{
	//-----------------Function 2 Declearations------------//
	int i, j = 0, index = 0;
	subscriber *newsubs;
	//-----------------------------------------------------//
 
	//---------------Loop for searching the id fr deleting----------------------//
	for (i = 0; i < *size; i++)
	{
		if (strcmp(club[i].ID, id) == 0)                    
		{
			index = i;
			break;                  //if found - do not continue (break)
		}
	}
	//----------------------------------------------------------------------------//
 
	//----------------------Case that index (of ID) not found in the loop below----------//
	if (i == *size)
	{
		printf ("ID: [%d] is not found!!!\n\n", id);
		return club;
	}
	//-----------------------------------------------------------------------------------//
 
	//-----------------------------If index (ID) found - do the following------------------------//
	else
	{
		newsubs = (subscriber*)malloc((*size-1)*sizeof(subscriber));        //Dynamically allocated memory for new buffer
 
		//--------------------------------------Checking if allocation is succeed---------------------------//
		if (newsubs == NULL)
		{
			printf ("Deleting subscriber is failed! - The memory allocation is failed!\n\n");
			return club;
		}
		//-------------------------------------------------------------------------------------------------//
 
		//----------------------------------Coping the old buffer to new one withount the index (of ID)-----//
		for (i = 0; i < *size; i++)
		{
			if (i != index)
				newsubs[j++] = club[i];
		}
		//--------------------------------------------------------------------------------------------------//
 
		printf ("The ID: [%d] removed successcfuly\n\n", id);
 
		free(club);                    //Free old buffer
		*size = *size-1;
 
		//----------------------------in case that buffer left empty--------------------------------------//
		if (*size == 0)
		{
			free(newsubs);
			newsubs = NULL;
		}
		//------------------------------------------------------------------------------------------------//
 
		return newsubs;              //Return the new buffer
	}
	//----------------------------------------------------------------------------------//
}
//------------------------------------------!!!!!!!!END FUNCTION TWO!!!!!!!!-------------------------------------------------//
 
 
 
 
 
//--------------------------------------------FUNCTION THREE - PRINT ALL SSUBSCRIBERS--------------------------------------------//
void  print_subscribers (subscriber * club, int  size)
{
	int i;  // Declearations of func 3
 
	//---------------------------------------------IF buffer is empty---------------------//
	if (club == NULL)                                       
		printf("There are no subscribers!\n\n");
	//-----------------------------------------------------------------------------------//
 
	//------------------IF NOT - Loop for printing all subscribers that exist in buffer-----------------//
	else
	{
		printf("The list of subscribers:\n\n");
 
		for (i = 0; i < size; i++)
		{
			printf("%s\t\t", club[i].name);
			printf("%s\t\t", club[i].address);
			printf("%s\t\t", club[i].ID);
			printf("%.1lf\n", club[i].fee);
		}
	}
	printf("\n");
	//-------------------------------------------------------------------------------------------------//
}
//-------------------------------!!!!!END FUNCTION THREE!!!!!-----------------------------//
 
 
 
 
 
//-------------------------------!!!!!FUNCTION FOUR - SORTING SUBSCRIBERS BY ID!!!!!-----------------------//
void id_sorting(subscriber * club, int size)
{
	int i, j, result = 0;   //Declearations fo func 4
 
	if (club != NULL)           //IF buffer is not empty
	{
		subscriber temp_arr;           //Temporary structure for coping
 
		//---------------------------Loop for comparing index and sorting--------------------//
		for (i = 0 ; i < size ; i++)
		{
		for (j = 0 ; j < size-i-1 ; j++)
		{
			result = strcmp (club[j].ID, club[j+1].ID);
			if (result > 0)
			{
				temp_arr = club[j]; 
				club[j]=club[j+1];
				club[j+1]=temp_arr;
			}
		}
		}
		//----------------------------------------------------------------------------------//
 
		printf("The array sorting by ID is succeeded!\n\n");
	}
	else         //IF Buffer Is Empty
		printf("The array is empty! Nothing to sort!\n\n");
}
//------------------------------------------!!!!!END FUNCTION FOUR!!!!!---------------------------------------//
 
 
 
 
 
//------------------------------------------!!!!FUNCTION FIVE - SORTING SUBSCRIBERS BY FEE!!!!!------------//
void  fee_sorting(subscriber * club, int size)
{
	//----------------Declearations of function 5-----------//
	int i, j; 
	subscriber temp_arr;
	//-----------------------------------------------------//
 
	if (club != NULL) //IF Buffer Is NOT Empty
	{
		//--------------------------Loop - for comparing each index and sort--------------------------------//
		for (i = 0 ; i < size ; i++)
		{
			for (j = 0 ; j < size-i-1 ; j++)
			{
				if(club[j].fee > club[j+1].fee)
				{
					temp_arr = club[j]; 
					club[j] = club[j+1];
					club[j+1] = temp_arr;
				}
			}
		}
		//--------------------------------------------------------------------------------------------------//
		printf("The array sorting by fee is succeeded!\n\n");
	}
	else             //IF Buffer IS Empty
		printf("The array is empty! Nothing to sort!\n\n");
}
 
//------------------------------------------!!!!!END FUNCTION FIVE!!!!!--------------------------------------//
 
 
 
 
 
//---------!!!!!MENU FUNCTION - PRINTING THE OPTION MENU!!!!!----------------------//
void menu()
{
	printf("Choose one of the following options:\n" "1 - Add subscribers\n"
		"2 - Delete subscriber\n"
		"3 - Print all subscribers \n"
		"4 - Sort subscribers by ID\n"
		"5 - Sort subscribers by fee\n"
		"6 - Exit\n");
}
//----------------------------!!!!!END MENU!!!!!-----------------------------------//
 
 
 
//***************************************************END PROGRAM************************************************//