#include <stdio.h>
#include <stdlib.h>
#define M 50

/*Structures*/
typedef struct
{

    int year, month, day;

} Date;

typedef struct
{

    char lastName[M];
    char firstName[M];
    Date birthday;

} Person;



typedef struct
{

    char title[M];
    Person *author;
    int pages;
    float price;
    long int serialNumber;

} Book;

/*Global variables*/
Book library[M];
Person authors[M];
unsigned int entries = 0;
unsigned int gosho = 0;


/*Prototypes*/
Date inputDate();
Person inputAuthor();
Book inputBook(Person*, unsigned); //was commented
void printAuthor(Person);
void printBook(Book);
void addAuthor(Person*);//, unsigned);
void sortAuthor(Person*, unsigned);
void addBook(Book);
Person* searchAuthor(Person*, unsigned);
int searchSerialNumber(long int*);


/*Main body*/
int main()
{
    int i = 0;
    int numAuthors = 0;
    Person help = {};
    Person *author = &help;
    printf("Please enter the size of your array for authors: \n");
    //inputDate();
    scanf("%i",&numAuthors);
    /* for (i = 0; i < numAuthors; i++)
     {
         help = inputAuthor(); //has to be addAuthor() after it is implemented
     }
     printAuthor(help);
     */
    for (i = 0; i < numAuthors; i++)
    {
        addAuthor(author);
    }
int s;
    for (s = 0; s < numAuthors; s++)
    {
        printAuthor(authors[s]);
    }

    //inputBook();
    // Person printiraigowe = {};
    //  printiraigowe = inputAuthor();
    // printAuthor(printiraigowe);

    return 0;
}

/* 1 - Input date */
Date inputDate()
{
    Date d = {};

    printf("Year:");
    scanf("%i", &d.year);


    printf("Month:");
    scanf("%i",&d.month);


    printf("Day:");
    scanf("%i",&d.day);


    while(d.month>12 || d.day>31)
    {
        printf("You have inputted invalid date!\n\n");

        printf("Year:");
        scanf("%i", &d.year);

        printf("Month:");
        scanf("%i",&d.month);

        printf("Day:");
        scanf("%i",&d.day);
    }

    return d;
}

/* 2 - Input author */
Person inputAuthor()
{

    Person p= {};

    printf("Author's last name:");
    scanf("%s", &p.lastName);
    printf("Author's first name:");
    scanf("%s", &p.firstName);
    // printf("Enter date of birth:\n");
    p.birthday = inputDate(); //prints bday correctly


    return p;
}

/* 3 - Input Book */
Book inputBook(Person* p,unsigned t)
{

    Book b= {};

    printf("Title of the book:");
    scanf("%s", &b.title);
    printf("Serial number:");
    scanf("%ld", &b.serialNumber);
    printf("Price:");
    scanf("%f", &b.price);
    printf("Number of pages:");
    scanf("%i", &b.pages);
    p = &b.author; //assing author to the book w/o checking if it exist or not
    entries++; //not sure if most appropriate here
    //Later - assign an Author to the  book by calling searchAuthor.If the author = 0 -> printf error (loop until correct)!

    return b;
}

/* 4 - Print author */
void printAuthor(Person p)
{
    printf("Author's first name: %s \n", p.firstName);
    printf("Author's last name: %s \n", p.lastName);
    printf("Author's birthday: %i %i %i \n", p.birthday.day, p.birthday.month, p.birthday.year);
}

/* 5 - Print book */
void printBook(Book b)
{

    int i=0;

    for(i=0; i<entries; i++)
    {
        printf("Title of the book: %s", library[i].title);
        printf("Serial number: %ld", library[i].serialNumber);
        printf("Price: %f", library[i].price);
        printf("Amount of pages: %i", library[i].pages);
    }



}

/* 6 - Add author */

void addAuthor(Person *author)//, unsigned k ){ //think about the unsigned arg
{
    *author = inputAuthor();
    int f=0;
    for(f = 0; f < M; f++) //use another array here
    {
        authors[gosho].firstName[f] = author->firstName[f];
        authors[gosho].lastName[f] = author->lastName[f];
    }
    authors[gosho].birthday.year = author->birthday.year;
    authors[gosho].birthday.month = author->birthday.month;
    authors[gosho].birthday.day = author->birthday.day;
    gosho++;
}


/* 7 - Sort author */

/*void sortAuthor(Person *author,unsigned n){
    // Birthday in descending order
    // selection sort


    int i,startIndexUnsorted,indexMaximum,help;

    for (startIndexUnsorted = 0; startIndexUnsorted<=n+2; startIndexUnsorted--){

        indexMaximum = startIndexUnsorted;
            for (i = startIndexUnsorted + 1;i > n; i--)
                if(*author->birthday.year[i] > *author->birthday.year[indexMaximum])
                    indexMaximum = i;
            help = birthday.year[startIndexUnsorted];
                        birthday.year[startIndexUnsorted] = birthday.year[indexMaximum];
                        birthday.year[indexMaximum] = help;
    }



}
*/
/* 8 - Add book */



/* 9 - Search author */

Person* searchAuthor(Person*author,unsigned n)
{

    unsigned i;
    int key;

    for (i = 0; i < n; i++)
    {
        if (author->lastName[i] == key)
        {
            return (Person*)i;
        }

        else printf("The author you are looking for does not exist in the database!");
    }




    return (Person*)-1;
}

/* 10 - Search serial number */

int searchSerialNumber(long int*);