json

import json


def clear():
    print("\n"*47)


def json_print(json_filename):
    with open(json_filename, "r") as json_name:
        for i, j in dict(json.load(json_name)).items():
            print(f"{i}: ")
            print(f"\tNumber of copies: {j[0]}")
            print(f"\tPrice: {j[1]}")


def json_add(json_filename):
    with open(json_filename, "r") as json_name:
        tmp_dict = dict(json.load(json_name))

    new_magazine_name = input("Enter magazine name: ")
    tmp = tmp_dict.get(new_magazine_name, -1)
    while tmp != -1:
        print("ERROR: this name was used.")
        print("Please, try again")
        new_magazine_name = input("Enter magazine name: ")
        tmp = tmp_dict.get(new_magazine_name, -1)

    new_number_of_copies = int(input("Enter number of copies magazine: "))
    new_price = int(input("Enter price: "))
    tmp_dict.update({new_magazine_name: (new_number_of_copies, new_price)})

    with open(json_filename, "w") as json_name:
        json.dump(tmp_dict, json_name)


def json_del_elem(json_filename):
    with open(json_filename, "r") as json_name:
        tmp_dict = dict(json.load(json_name))

    del_name = input("Enter name you want to delete: ")
    tmp = tmp_dict.get(del_name, -1)
    while tmp == -1:
        print("ERROR: this name not found.")
        print("Please, try again")
        del_name = input("Enter name you want to delete: ")
        tmp = tmp_dict.get(del_name, -1)

    tmp_dict.pop(del_name)

    with open(json_filename, "w") as json_name:
        json.dump(tmp_dict, json_name)


def json_search(json_filename):
    with open(json_filename, "r") as json_name:
        tmp_dict = dict(json.load(json_name))

    del_name = input("Enter name you want to search: ")
    tmp = tmp_dict.get(del_name, -1)
    if tmp == -1:
        print("This name not found.")
    else:
        print(f"\tNumber of copies: {tmp[0]}")
        print(f"\tPrice: {tmp[1]}")

    return tmp


def json_calc(json_filename):
    with open(json_filename, "r") as json_name:
        tmp_dict = dict(json.load(json_name))

    res = 0
    count = 0
    for i, j in tmp_dict.items():
        if j[0] < 10000:
            count += 1
            res += j[1]
    res /= count
    return res


def menuPrint():
        clear()
        print("1 - Show All element")
        print("2 - Search element")
        print("3 - Delete element")
        print("4 - Add new element or updates")
        print("5 - Average price of magazines with a circulation of less than 10000")
        print("0 - Exit")
        pressKey = input("Enter a selection -> ")
        clear()
        return pressKey


def json_menu(json_filename):
    pressKey = menuPrint()
    if pressKey == '1':
        json_print(file_name)
    elif pressKey == '2':
        json_search(json_filename)
    elif pressKey == '3':
        json_del_elem(file_name)
        json_print(file_name)
    elif pressKey == '4':
        json_add(file_name)
        json_print(file_name)
    elif pressKey == '5':
        average_price = json_calc(file_name)
        print(f"Average price of magazines with a circulation of less than 10000: {average_price}")
    elif pressKey == '0':
        exit(0)
    else:
        print("ERROR: menu under this number does not exist.")
    input("Enter any key to continue -> ")
    json_menu(json_filename)


name_magazine = ("eqwdfszx", "bgfdvscz", "bvvtgf", "sbtygfdfvsd", "asdf")
number_of_copies = [8000, 14000, 20000, 9000, 16000]
price = [1100, 1000, 1200, 500, 1300]

magazine_dict = {k: v for k, v in zip(name_magazine, {k: v for k, v in zip(number_of_copies, price)}.items())}

file_name = "file_name.json"
with open(file_name, "w") as write_json:
    json.dump(magazine_dict, write_json)

json_menu(file_name)