import os
import re
import numpy as np
import math


def UnpackingMif(file_directory: str):
    try:
        x, y = [], []
        readMif(file_directory, x, y)
        temp_square=Square(x, y)
        x.clear()
        y.clear()
        return temp_square
    except FileNotFoundError:
        return 0
        
def readMif(path: str, x, y):
    with open(path,'r', encoding='Windows-1251') as file:
        t = []
        region = False
        for line in file:
            if 'Region' in line:
                region = True
                continue
            if region:
                t.append(line)
        t = t[1:-3]
        for ch in t:
            ch = re.sub('[\n]', '', ch)
            ch = ch.split(" ")
            if check_float(ch[0]) and check_float(ch[1]):   
                y.append(round(float(ch[0]), 2))
                x.append(round(float(ch[1]), 2))
            else:
                continue

def Square(x, y):
    area = 0.5 * np.abs(np.dot(x, np.roll(y, 1)) - np.dot(y, np.roll(x, 1)))
    rounded_area = math.ceil(area - 0.5) if (area % 1) >= 0.5 else round(area)
    return int(rounded_area)  # Возвращаем целое число
    #return round(0.5 * np.abs(np.dot(x, np.roll(y, 1)) - np.dot(y, np.roll(x, 1))), 0)

def check_float(var):
    try:
        float(var)
    except ValueError:
        return False
    return True