#include <stdio.h>

#define ROWS 5
#define SEATS_IN_ROW 3

#define CHEAP_TICKET_PRICE 25
#define NORMAL_TICKET_PRICE 35
#define VIP_TICKET_PRICE 50

void printCinema(int cinema[][SEATS_IN_ROW], int rows);
int buy_tickets(int seats[][SEATS_IN_ROW], int row, int seatInRow);
int popcorn_amount(int seats[][SEATS_IN_ROW]);
void club_member(int seats[ROWS][SEATS_IN_ROW], int row, int seatInRow);
void owner_gone_mad(int seats[][SEATS_IN_ROW], int newPrice);


int main(void)
{

    int choice = 0;

    int row = 0;
    int seatInRow = 0;
    int returnValue = 0;
    int newSeatPrice = 0;

    int cinema[ROWS][SEATS_IN_ROW] = {{CHEAP_TICKET_PRICE, CHEAP_TICKET_PRICE, CHEAP_TICKET_PRICE},
                                      {NORMAL_TICKET_PRICE, NORMAL_TICKET_PRICE, NORMAL_TICKET_PRICE},
                                      {NORMAL_TICKET_PRICE, VIP_TICKET_PRICE, NORMAL_TICKET_PRICE},
                                      {NORMAL_TICKET_PRICE, NORMAL_TICKET_PRICE, NORMAL_TICKET_PRICE},
                                      {CHEAP_TICKET_PRICE, CHEAP_TICKET_PRICE, CHEAP_TICKET_PRICE}};


    printf("Welcome to cinema.\n");
    printf("Print cinema = 1\n");
    printf("Buy a ticket = 2\n");
    printf("Calculate amount of popcorn = 3\n");
    printf("Club member discount = 4\n");
    printf("Owner be crazy = 5\n");
    printf("Exit program = 6\n");

    while(choice != 6)
    {
        printf("Enter new choice:\n");
        scanf(" %d", &choice);

        switch(choice)
        {
            case 1:
                printCinema(cinema, 0);
                break;
            case 2:
                printf("Choose row:\n");
                scanf(" %d", &row);
                printf("Choose seat number:\n");
                scanf(" %d", &seatInRow);
                returnValue = buy_tickets(cinema, row, seatInRow);
                if (returnValue==1)
                {
                    printf("Purchase sucssesful.\n");
                }
                else
                {
                    printf("Purchase not sucssesful.\n");
                }
                break;
            case 3:
                printf("Amount of popcorn to be made: %d\n", popcorn_amount(cinema));
                break;
            case 4:
                printf("Choose row:\n");
                scanf(" %d", &row);
                printf("Choose seat number:\n");
                scanf(" %d", &seatInRow);
                club_member(cinema, row, seatInRow);
                break;
            case 5:
                printf("Choose new seat price:\n");
                scanf(" %d", &newSeatPrice);
                owner_gone_mad(cinema, newSeatPrice);
                break;
            case 6:
                printf("Thanks for using my cinema.\n");
                return 0;
        }
    }

    return 0;
}

/**
Print a cinema hall ticket prices
Input:     hall, and number of rows
Output: None
*/
void printCinema(int mat[][SEATS_IN_ROW], int rows)
{
    int row = 0;
    int col = 0;
    for(row = 0; row<ROWS; row++)
    {
        for(col = 0 ; col<SEATS_IN_ROW ; col++)
        {
            printf("%d ", mat[row][col]);
        }
        printf("\n");
    }
}

int buy_tickets(int seats[][SEATS_IN_ROW], int row, int seatInRow)
{
    if(seats[row][seatInRow]!=-1)
    {
        seats[row][seatInRow] = -1;
        return 1; //if seat is empty.
    }

    return 0; //if seat isnt empty.
}

int popcorn_amount(int seats[][SEATS_IN_ROW])
{
    int row = 0;
    int col = 0;
    int takenSeats = 0;

    for(row = 0; row<ROWS; row++)
    {
        for(col = 0; col<SEATS_IN_ROW; col++)
        {
            if(seats[row][col]==-1)
            {
                 takenSeats = takenSeats+1;
            }
        }
    }

    return takenSeats;
}

void club_member(int seats[][SEATS_IN_ROW], int row, int seatInRow)
{

    if(seats[row][seatInRow]!=-1)
    {
        seats[row][seatInRow] = seats[row][seatInRow] - seats[row][seatInRow] * 0.1;
    }
}


void owner_gone_mad(int seats[][SEATS_IN_ROW], int newPrice)
{
    int row = 0;
    int col = 0;

    for(row = 0; row<ROWS; row++)
    {
        for(col = 0; col<SEATS_IN_ROW; col++)
        {
            if(seats[row][col]!=-1)
            {
                seats[row][col] = newPrice;
            }
        }
    }
}