"""
Calculate percentage level of index for regions
inside the Verenigde Nederlanden.
"""

REGIONS = {
    'Northern Netherlands': None,
    'Eastern Netherlands': None,
    'Southern Netherlands': None,
    'Western Netherlands': None,
    'Amsterdam': None,
    'Luxembourg': None,
}

PRINT_DENSE = True


def region_in_string(string):
    """Look for region in string"""
    for region in REGIONS:
        if region in string:
            return True
    return False


def calculate_index():
    """Calculate index bases on file"""
    with open('index.txt', 'r') as file:
        line_nr = 0
        last_percentage = 11
        for line in file:
            line_nr += 1
            if region_in_string(line):
                percentage = 11 - 10 / 998 * (line_nr - 3)
                diff_percentage = last_percentage - percentage
                last_percentage = percentage
                region = line.strip().split('\t')
                REGIONS[region[0].strip()] = percentage
                if not PRINT_DENSE:
                    print('%40s %2s %6.2f %% %6.2f %%' % (
                        region[0],
                        region[1],
                        percentage,
                        diff_percentage
                    ))

        if PRINT_DENSE:
            index = 1
            length = len(REGIONS)
            for region in REGIONS:
                if index == length:
                    print('%.2f' % REGIONS[region])
                else:
                    print('%.2f,' % REGIONS[region], end='')
                index += 1


if __name__ == '__main__':
    calculate_index()