import gc

class Accounting():
    all_bills = []
    counter = 0
    def __init__(self, name:str, surname:str, room_num, key_num, period:str, bill_num:str, bill_status:bool):
        print("Wird Ausgeführt")
        self.name = name
        self.surname = surname
        self.room_num = room_num
        self.key_num = key_num
        self.period = period
        self.bill_num = bill_num
        self.bill_status = bill_status
        Accounting.counter += 1
        gc.get_objects()
        gc.get_threshold()
        
    def show_bill(self):
        
        stay_period = []
        num_string = ""
        for i in self.period:
            if i.isnumeric():
                num_string += i
            if i == ",":
                stay_period.append(num_string)
                num_string = ""
        
        stay_period.append(num_string)
        
        stay_period = tuple(stay_period)
        # Same month
        
        if stay_period[1] == stay_period[3]:
            days = int(stay_period[0]) - int(stay_period[2])
            
        # Across months
        if stay_period[1] != stay_period[3]:
            # Stay period more than 1 month
            if int(stay_period[3]) - int(stay_period[1]) > 1:
                days = 28 - int(stay_period[0]) + int(stay_period[2]) + \
                       ((int(stay_period[3]) - int(stay_period[1])-1) * 28)
            # Stay period 
            else:
                days = 28 - int(stay_period[0]) + int(stay_period[2])
        
        costs = int(days) * int(self.room_num)

        """_______________________________________________________________________"""
        lines = [[] for i in range(13)]
        lines[0].append( '┌─────────────────────────────┐')
        lines[1].append( '│           Rechnung          │')
        lines[2].append( '│                             │')
        lines[3].append( '│Kunde:    {} {}              '.format(self.name, self.surname))
        lines[4].append( '│Zimmer:   {}                 '.format(self.room_num))
        lines[5].append( '│Anz. Tage:{}                 '.format(days))
        lines[6].append( '│pro Nacht:{}€                '.format(self.room_num))
        lines[7].append( '│Kosten:   {}€                '.format(costs))
        lines[8].append( '│                             ')
        lines[9].append( '│Rech. Nr.:{}                 '.format(self.bill_num,))
        lines[10].append('│Beglichen:{}                 '.format(self.bill_status))
        lines[11].append('│                             │')
        lines[12].append('└─────────────────────────────┘')

        for i in lines:
            print(i[0])


    def pay_bill(self):
        self.bill_status = True
        print("Rechnung", self.bill_num, "wurde bezahlt.")


    def __del__(self):
        print("Rechnung wurde storniert.")


#r43 = Accounting("Karl", "Otto", 16, 21,"2,3,4,5", "", False)
bill_list = []


def add_bill():
    name = input("Name : ")
    surname = input("Nachname :")
    client_num = input("Kundennummer :")
    room_num = input("Zimmernummer :")
    period = input("Aufenthaltszeitraum :")
    key_num = input("Schlüsselnummer :")
    bill_numb = "r" + str(Accounting.counter)
            
    c = bill_numb + " = Accounting(" + '"' + str(name) + '"' + "," + '"' +  \
str(surname) + '"' +  "," + '"' + str(room_num) +  '"' +  "," +  '"' + str(key_num) \
+ '"' +  "," + '"' + str(period) + '"' +  ","  + '"'+ str(bill_numb) + '"' + ", False)"
    bill_list.append(bill_numb)
    return c

def show_single_bill():
    while True:
        k = input("Rechnungsnummer? ")
        if k in bill_list:
            break
    c = str(k) + ".show_bill()"
    exec(c)

def delete_bill():
    input_ = input("Rechnungsnummer: ")
    delete = "del " + input_
    exec(delete)

#while True:
#    k = add_bill()
#    exec(k)