import import_ipynb

from helpers import *
from item import *
from item_method_container import *

import re

valid_regex = "^(0|-?[1-9][0-9]*|[A-Za-z][0-9A-Z_a-z]*)$"
number_regex = "^-?[0-9]+$"

def is_valid_string(_str):
    return re.search(valid_regex, _str)

def is_number_string(_str):
    return re.search(number_regex, _str)

class ItemMethodContainerString(ItemMethodContainer):
    def insert_before(self, item, other):
        if is_number_string(item.value) and is_number_string(other.value):
            return int(item.value) <= int(other.value)
        else:
            return item.value <= other.value

    def value_equals(self, item, value):
        return item.value == value

item_method_container_string = ItemMethodContainerString()

start = None
begin = True
_input = None

while True:
    if not begin:
        print()
    else:
        begin = False

    _input = input("Awaiting input...\n")

    if len(_input) == 0:
        start = remove_all(start)
        print("\nProgram terminated!")
        break

    elif _input[0] == "~":
        if len(_input) == 1:
            print("\nDeleting list...")
            start = remove_all(start)
        else:
            _input = _input[1:]
            if is_valid_string(_input):
                print("\nRemoving item...")
                start = remove_item(start, _input)
            else:
                print("\nCould not parse input!")

    elif _input == "l":
        print("\nList print...")
        print_list(start)

    elif _input == "i":
        print("\nIterator print...")
        print_iterator(start)

    elif _input == "a":
        print("\nArray print...")
        print_array(start)

    elif is_valid_string(_input):
        print("\nInserting item...")
        start = insert_item(start, _input, item_method_container_string)

    else:
        print("\nCould not parse input!")