#class=> Library
#Layer of Encapsulation=> Display available books, lend a book, add a book
#class=> Customer
#Layer of abstraction => request a book, return a book
import random
import datetime

today = datetime.datetime.now()
year = today.year
month = today.month + 2
day = today.day
deadline = datetime.datetime(year, month, day)

print("\t\t\tBLESSING'S LIBRARY")
print( )

StudentDetails = { }


class Library():
    def __init__(self, dict_of_books):
        self.availablebooks = dict_of_books

    def display_available_books(self):
        print( )
        print("Available Books: ")
        print("______________________________________")
        for book in self.availablebooks:
            print("\t\t\t", book)
        print("_______________________________________")


    def lend_a_book(self,requestedBook):
        print( )
        global deadline
        my_deadline = deadline.strftime("%A, %B %d, %Y")

        if requestedBook in self.availablebooks and self.availablebooks[requestedBook] >=1:
            print(f"You have borrowed \"{requestedBook}\".")
            print(f"The deadline for submission is on {my_deadline}")
            print()
            self.availablebooks[requestedBook]-=1
        elif requestedBook not in self.availablebooks:
            print(f"Sorry \"{requestedBook}\" not available. Modifications will be made latter")
            print()
        elif requestedBook in self.availablebooks and self.availablebooks[requestedBook]==0:
            print(f"Sorry \"{requestedBook}\" is out of stock. Check up later")
            print()




    def add_a_book(self, returnedBook):
        self.availablebooks[returnedBook]+=1
        print(f"You have returned {returnedBook}. Thank You!")



class Customer():

    def request_a_book(self):
        print("Enter the book you want to request: ")
        self.book = input( ).title()

        return self.book

    def return_a_book(self):
        print("Enter the name of the book you are returning : ")
        self.book = input( ).title()
        return self.book




library = Library({"Lord Of The Rings": 5,"The Colour Of Magic":12,"A Game Of Thrones":25, "The Fellowship Of The Ring":16,"Pride And Prejudice":10,
                   "Fifty Shades Of Grey":4,"The Hating Game":6,"Vision White":14,"Gone With The Wind":2,"The Thorn Birds":7,
                    "The Calculating Stars":3,"Semiosis":13,"Space Opera":7,"The Book Of M":11,"The Gone World":13,"Blackfish City":15,
                    "Into Thin Air":8,"Into The World":12,"Treasure Island":5,"Journey To The Centre Of The Earth":6, "Heart of Darkness":4,
                     "The Power Of Positive Thinking":3,"Think And Grow Rich":2, "You Are A Badass":17, "You Can Heal Your Life":16})


customer = Customer()




while True:

    print("Press 1 to Create Account")
    print("Press 2 to login")
    print("Press 3 to exit")
    print()
    inp = int(input( ))

    if inp == 1:
        accountID = random.randint(100000, 999999)
        def CreateAccount():
            name = input("Enter your Name: ")
            email = input("Enter your Email Address ")
            global accountID
            global StudentDetails
            StudentDetails[name] = [accountID, email]
            return True

        CreateAccount = CreateAccount()



        if CreateAccount is True:
            print("Account Creation Successful")

            print(f"Your Account ID is {accountID}")
            print()
            while True:
                print("Press 1 to display the available books")
                print("Press 2 to request a book")
                print("Press 3 to return a book")
                print("Press 4 to return to previous menu")
                print()

                useroption = int(input())
                if useroption ==1:
                    library.display_available_books()
                    print()
                elif useroption == 2:
                    request = customer.request_a_book()
                    library.lend_a_book(request)
                elif useroption == 3:
                    returnedBook = customer.return_a_book()
                    library.add_a_book(returnedBook)
                elif useroption ==4:
                    break
        else:
            print("Account Creation Failed")
    elif inp == 2:
        def login():
            name = input("Enter your name:")
            email = input("Enter your email address: ")
            accountid = (input("Enter your account Id: "))
            global StudentDetails
            if name in StudentDetails:
                if email and accountid in name:
                    return True
                else:

                    return False
            else:

                return False


        login = login()
        if login is True:
            print("Login Successful")
            print()
            while True:
                print("Press 1 to display the available books")
                print("Press 2 to request a book")
                print("Press 3 to return a book")
                print("Press 4 to return to previous menu")
                print()

                useroption = int(input())
                if useroption == 1:
                    library.display_available_books()
                    print()
                elif useroption == 2:
                    request = customer.request_a_book()
                    library.lend_a_book(request)
                elif useroption == 3:
                    returnedBook = customer.return_a_book()
                    library.add_a_book(returnedBook)
                elif useroption == 4:
                    break
        else:
            print("Login not Successful. Invalid Name or Account ID")
    elif inp ==3:
        quit()