import requests
import glob

def download_files():
    #This function creates two .dat files necessary for further calculations

    weather_source = requests.get('http://codekata.com/data/04/weather.dat')
    football_source = requests.get('http://codekata.com/data/04/football.dat')

    with open('weather.dat', 'wb') as f:
        f.write(weather_source.content)

    with open('football.dat', 'wb') as f:
        f.write(football_source.content)

def smallest_difference():
    filenames = glob.glob('*.dat')

    for file in filenames:
        data = open(file)
        if file.startswith('weather'):
            weather_data_list = []

            for line in data:
                weather_data_list += [line.split()]

            separate_days_data = [x for x in weather_data_list[2:]]
            temperatures_list = [x[:3] for x in separate_days_data[:-1]]
            numeric_lists = [[elem.replace('*', '') for elem in lst] for lst in
                             temperatures_list]  # Remove asterisks from string
            values = [[int(x) for x in sublist] for sublist in numeric_lists]
            max_temperatures = [x[1] for x in values]
            min_temperatures = [x[2] for x in values]
            subtraction_results = [x - y for x, y in zip(max_temperatures, min_temperatures)]
            day_with_smallest_temp_spread = subtraction_results.index(min(subtraction_results)) + 1

            print(f'Day with smallest temperature spread is {day_with_smallest_temp_spread}th of July 2002')

        elif file.startswith('football'):
            football_data = []

            for line in data:
                football_data += [line.split()]

            separate_teams = [x for x in football_data[1:]]
            separate_teams.pop(17)
            scored_goals = [int(x[6]) for x in separate_teams]
            lost_goals = [int(x[8]) for x in separate_teams]
            goals_difference = [x - y for x, y in zip(scored_goals, lost_goals)]
            team_names = [x[1] for x in separate_teams]
            teams_goals = {k: v for (k, v) in zip(team_names, goals_difference)}
            lowest_goal_difference_team = min(teams_goals, key=lambda v: abs(teams_goals[v]))

            print('Team with smallest difference in "for" and "against" goals is',
                  lowest_goal_difference_team.replace('_', ' '))