# -- Importing some important modules ...
# from collections import OrderedDict
from logging import exception
import os
import json
from datetime import date
import time
import Student_Module as std
def clear(): return os.system('cls' if os.name in ('nt', 'dos') else 'clear')



# >> ....................................... Auxillary functions ....................................... <<

# // Function for spacing 
def tab(n):
    a=" "
    b=str()
    for i in range(n):
        b=b+a
    return b

# // Function to return today's date
def today_date():
    dateIs = date.isoformat(date.today())
    return dateIs

# // Function for returning the no. of available records of books
def serial_no():
    f = open("Stationaries.txt")
    ser = int()
    while True:
        try:
            a=f.readline()
            if a=="":
                break
            ser = ser+1
            print(ser)
        except:
            break

    f.close()
    return ser+1

# // Function for printing the list of books/students
def printList(takeList,arg1):
    clear()
    bookName=[]
    Class=[]
    Bool=[]
    Status=[]
    Date=[]
    Sn=[]

    for item in takeList:

        bookName.append(item['Book'])
        Class.append(item['Class'])
        Bool.append(item['Bool'])
        Status.append(item['Status'])
        Date.append(item['Date'])
        Sn.append(item['SerialNo'])

    if arg1 == "C" or arg1 == "D":

        print(" Sn. I  Book   I    Class  I   Type   I      Date     I      Status    I")

        for i in range(len(Sn)):
            stat=Status[i]
            if stat==True:
                stats="Available"
            elif stat==False:
                stats="Unavailable"
            print(f" {i}.{tab(4)}{bookName[i]}{tab(15-len(bookName[i]))}{Class[i]}{tab(9-len(str(Class[i])))}{Bool[i]}{tab(8-len(str(Bool[i])))}{tab(3)}{Date[i]}        {stats}\n")

    elif arg1=="P":
        pass

# >> ..................................................................................................... <<



# >> ........................................... Main Functions .......................................... <<

# // Returns the list of books [returns list]
def listOfBooks():
    clear()
    f = open("Stationaries.txt")

    def sortDateWise():
        sorted_list1 = []
        while True:
            try:
                a=f.readline()
                b=json.loads(a)
                sorted_list1.append(b)
            except:
                break 
        print(sorted_list1)
        time.sleep(2)
        return sorted_list1

    def sortClassWise():
        a = sortDateWise()
        li = {}
        sorted_list2 = []
        for item in a:
            dict1 = item
            sr = dict1['SerialNo']
            cl = dict1['Class']
            li[sr] = cl
        sort_orders = sorted(li.items(), key=lambda x: x[1])
        # print(sort_orders)
        # time.sleep(4)
        for item in sort_orders:
            seri = item[0]
            for item2 in a:
                seri2 = item2['SerialNo']
                if seri2 == seri:
                    sorted_list2.append(item2)
        print(sorted_list2)
        time.sleep(2)
        return sorted_list2
    
    def sortPendingWise():
        pass

    print("""
    Sort according to Date or Class -
    \n 1.Date [D]
    \n 2.Class [C]
    \n 3.Pending Books[P]
    """)
    user_response = input("Choose any one : ")
    if user_response == "d":
        sorted_list = sortDateWise()
        f.close()
        return sorted_list,"D"
    elif user_response == "c":
        sorted_list = sortClassWise()
        f.close()
        return sorted_list,"C"
    elif user_response == "p":
        sorted_list = sortPendingWise()
        f.close()
        return sorted_list,"P"

# // Add new item
def addNewBook():
    f = open("Stationaries.txt", "a")
    clear()
    print("Fill the data below ...\n")
    a = str(input("Subject : "))
    b = int(input("Class : "))
    c = input("Book[b] or Copy[c] : ")
    if c == "b":
        bol = True
    elif c == "c":
        bol = False
    dict_of_item = {"Book": a, "Class": b,                           # -- Here Bool and Status class are boolean keys in this dict_of_item  
                    "Bool": bol, "Status":True,                      # -- Bool [True:Book & False:Copy] and Status[True:Availabe and False:Unavailable]
                    "Date": today_date(), "SerialNo": serial_no()}
    str_of_dict=json.dumps(dict_of_item)
    f.write(str_of_dict+'\n')
    f.close()

# // If user wants to borrow any book
def borrowBook():
    f=open("Stationaries.txt","r")
    
    #.. ***********Input section************
    std_name=input("Enter the student's name : ")
    std_class=input("Enter its class :")
    result=std.check(std_name,std_class)
    d=str()
    if result==True:
        bk_name=input("Enter the name of the book/subject : ")
        while True:
            try:
                a=f.readline()
                if a==" ":
                    break
                b=json.loads(a)
                book_name=b['Book']
                avail=b['Status']
                if avail==True:  
                    if bk_name.casefold()==book_name.casefold():
                        b['Status']=False
                        c=json.dumps(b)
                        d=d+c+'\n'
                    else:
                       c=json.dumps(b)
                       d=d+c+'\n' 
                else:
                    c=json.dumps(b)
                    d=d+c+'\n'
            except:
                break        
    elif result==False:
        pass
    fn=open("Stationaries.txt","w")  
    fn.write(d)
    fn.close()
    f.close()

# // If user wants to return any borrowed book
def returnBook():
    pass

# // library function
def libraryHeader():

    while True:

        clear()

        print("""
1.See the list of Books/Copies\n
2.Add new Book/Copy\n
3.Borrow any Book/Copy\n
4.Return the Book/Copy\n
        """)
    # try:
        user_input=int()
        user_input=int(input("Enter Your Choice [1, 2, 3, 4]: "))

            
        if user_input == 1:
            list_of_books,Wise=listOfBooks()
            printList(list_of_books,Wise)
            break
        elif user_input == 2:
            addNewBook()
            break
        elif user_input == 3:
            borrowBook()
            break
        elif user_input == 4:
            returnBook()
            break
        else:
            print("Invalid Input !")
    # except:
    #     print("Invalid Input !")
        time.sleep(2)
        clear()



# .. Main  body of the program
if __name__ == "__main__":
    clear()