from __future__ import annotations
from datetime import datetime


class Player:
    all_players: list[Player] = []

    name: str
    elo: int
    total_games: int

    def __init__(self, name: str):
        self.name = name
        self.elo = 1000
        self.total_games = 0
        self.all_players.append(self)

    def __str__(self):
        return self.name

    @staticmethod
    def print_ladder():
        print(f"Ladder ({datetime.now().strftime('%d/%m/%Y %H:%M')}):")
        print("=" * 30)
        for rank, player in enumerate(
            sorted(Player.all_players, key=lambda player: player.elo, reverse=True)
        ):
            print(
                f"{rank+1}.\t{player.name:<20}: {player.elo:>4d} points, {player.total_games:>3d} games"
            )


Emma = Player(name="Emma")
Kim = Player(name="Kim")
Pierre = Player(name="Pierre")
Theo = Player(name="Théo")
Leila = Player(name="Leïla")
Martin = Player(name="Martin")
Clementine = Player(name="Clémentine")
Thomas = Player(name="Thomas")
Baptiste = Player(name="Baptiste")
Tanguy = Player(name="Tanguy")

D = 400
K = 32


class Game:
    scores: dict[Player, int]
    played_at: datetime

    def __str__(self) -> str:
        total_points = sum(self.scores.values())
        return f"Game played at {self.played_at} ({total_points} total points)"

    def __init__(self, played_at: datetime, scores: dict[Player, int]):
        self.scores = scores
        self.played_at = played_at

    def get_players_elo_updates(self) -> dict[Player, float]:
        players_elo_updates = {player: 0.0 for player in self.scores}
        for player in self.scores:
            player.total_games += 1
        for player_1, score_1 in self.scores.items():
            for player_2, score_2 in self.scores.items():
                if player_1 != player_2:
                    expected_score = 1 / (1 + 10 ** ((player_2.elo - player_1.elo) / D))
                    result = (
                        1.0 if score_1 > score_2 else 0.0 if score_1 < score_2 else 0.5
                    )
                    players_elo_updates[player_1] += K * (result - expected_score)

        return players_elo_updates


games: list[Game] = [
    Game(
        datetime(2022, 11, 11, 16, 30),
        {Theo: 53, Leila: 32, Clementine: 53, Emma: 48, Kim: 50, Martin: 51},
    ),
    Game(
        datetime(2022, 11, 11, 17, 0),
        {Emma: 53, Kim: 57, Pierre: 48, Theo: 44, Leila: 32, Martin: 57},
    ),
    Game(
        datetime(2022, 11, 11, 18, 45),
        {Thomas: 58, Baptiste: 45, Pierre: 54, Theo: 65, Emma: 42, Martin: 53},
    ),
    Game(
        datetime(2022, 11, 11, 21, 0),
        {Kim: 50, Theo: 50, Emma: 53, Clementine: 55, Pierre: 46, Baptiste: 54},
    ),
    Game(
        datetime(2022, 11, 11, 21, 30),
        {
            Kim: 41,
            Leila: 32,
            Theo: 48,
            Emma: 49,
            Clementine: 52,
            Pierre: 54,
            Baptiste: 59,
        },
    ),
    Game(
        datetime(2022, 11, 11, 22, 0), {Clementine: 47, Pierre: 46, Theo: 57, Emma: 42}
    ),
    Game(
        datetime(2022, 11, 11, 22, 32), {Clementine: 43, Pierre: 51, Theo: 40, Emma: 39}
    ),
    Game(
        datetime(2022, 11, 12, 12, 48),
        {Pierre: 58, Theo: 52, Emma: 59, Thomas: 50, Baptiste: 52},
    ),
    Game(datetime(2022, 11, 12, 13, 18), {Emma: 41, Theo: 53, Pierre: 44}),
    Game(datetime(2022, 11, 12, 13, 47), {Emma: 65, Thomas: 59, Pierre: 54}),
    Game(
        datetime(2022, 11, 12, 14, 15),
        {Pierre: 57, Emma: 52, Martin: 45, Clementine: 47},
    ),
    Game(datetime(2022, 11, 12, 14, 47), {Pierre: 51, Emma: 47, Clementine: 56}),
    Game(
        datetime(2022, 11, 12, 19, 6),
        {Clementine: 43, Kim: 47, Theo: 13, Pierre: 47, Emma: 62},
    ),
    Game(
        datetime(2022, 11, 13, 12, 31),
        {Theo: 43, Thomas: 37, Tanguy: 44, Pierre: 47, Emma: 61},
    ),
    Game(
        datetime(2022, 11, 13, 12, 54),
        {
            Tanguy: 54,
            Clementine: 47,
            Theo: 65,
            Thomas: 44,
            Pierre: 60,
            Kim: 58,
            Emma: 46,
        },
    ),
    Game(datetime(2022, 11, 13, 13, 25), {Pierre: 52, Emma: 68, Clementine: 57}),
]

for game in games:
    print(game)
    print("=" * 30)
    players_elo_updates = game.get_players_elo_updates()

    for (player, elo_update) in players_elo_updates.items():
        player.elo += int(elo_update)
        print(f"\t{player.name:<20}{int(elo_update):+}\t({player.elo:>4d})")

Player.print_ladder()