from typing import Tuple
from random import shuffle, sample
from app.data import Player, DisplayPlayer, Team, Game
from app.data import MAX_LEVEL, PLAYER_PER_COURT


def _shuffle_two_lists(a: list, b: list) -> Tuple[list, list]:
    indices = list(range(len(a)))
    shuffle(indices)
    a = [a[index] for index in indices]
    b = [b[index] for index in indices]
    return a, b


def _pick_from_list_after_sorting_other(a: list, b: list[int]) -> list:
    indices = [i[0] for i in sorted(enumerate(b), key=lambda x: x[1])]
    return [a[index] for index in indices]


def sample_list(indices: list, cost: list[int], count=None) -> list:
    if count is None:
        count = len(indices)
    indices, cost = _shuffle_two_lists(indices, cost)
    indices = _pick_from_list_after_sorting_other(indices, cost)[:count]
    return indices


def _create_placeholders(courts: dict, name: str) -> list[Game]:
    dummy_player = Player(id=-1, first=name)
    dummy_team = Team(
        player1=DisplayPlayer(dummy_player), player2=DisplayPlayer(dummy_player)
    )
    games = [Game(court, dummy_team, dummy_team) for court in courts]
    return games


def _normalize_skill(level: int, new_max: int) -> int:
    new_level = round((new_max - 1) * (level / MAX_LEVEL)) + 1
    return new_level


def _select_players(players: list[Player], count: int) -> list[Player]:
    identifiers = [player.id for player in players]
    play_count = [int(player.count) for player in players]
    ids = sample_list(identifiers, play_count, count)
    selected_players = [player for player in players if player.id in ids]
    return selected_players


def _create_groups_of_four_players(
    players: list[Player], new_max: int
) -> list[list[Player]]:
    identifiers = [player.id for player in players]
    player_levels = [_normalize_skill(int(player.level), new_max) for player in players]
    identifiers = sample_list(identifiers, player_levels)
    court_players = []
    for i in range(0, len(players), PLAYER_PER_COURT):
        court_ids = identifiers[i : i + PLAYER_PER_COURT]
        selected_players = [player for player in players if player.id in court_ids]
        court_players.append(selected_players)
    return court_players


def _create_shuffle_games(
    courts: dict, players: list[Player], levels: int
) -> list[Game]:
    court_players = _create_groups_of_four_players(players, levels)
    games = []
    for court, players in zip(courts, court_players):
        team1 = Team(
            player1=DisplayPlayer(players[0]), player2=DisplayPlayer(players[3])
        )
        team2 = Team(
            player1=DisplayPlayer(players[1]), player2=DisplayPlayer(players[2])
        )
        games.append(Game(court, team1, team2))
    return games


def _create_team_games(courts: dict, teams: dict) -> tuple[list[Game], list[Player]]:
    games = []
    selected_players = []
    for court, (_, players) in zip(courts, teams.items()):
        players = sample(players, PLAYER_PER_COURT)
        selected_players += players
        players.sort(key=lambda x: x.level, reverse=True)
        team1 = Team(
            player1=DisplayPlayer(players[0]), player2=DisplayPlayer(players[3])
        )
        team2 = Team(
            player1=DisplayPlayer(players[1]), player2=DisplayPlayer(players[2])
        )
        games.append(Game(court, team1, team2))
    return games, selected_players


def separate_teams_and_players(players: list[Player]) -> Tuple[dict, list[Player]]:
    unique_team_id = {player.team for player in players}
    grouped_players_by_team = {team_id: [] for team_id in unique_team_id}
    for player in players:
        team = player.team
        grouped_players_by_team[team].append(player)
    active_teams = {}
    players_without_team = []
    for team_id in grouped_players_by_team:
        if team_id == 0:
            players_without_team += [
                player for player in grouped_players_by_team[team_id]
            ]
        else:
            if len(grouped_players_by_team[team_id]) >= 4:
                active_teams[team_id] = grouped_players_by_team[team_id]
            else:
                players_without_team += [
                    player for player in grouped_players_by_team[team_id]
                ]
    return active_teams, players_without_team


def split_courts(courts: dict, n) -> Tuple[dict, dict]:
    first_half = {k: v for (k, v) in [x for x in courts.items()][:n]}
    second_half = {k: v for (k, v) in [x for x in courts.items()][n:]}
    return first_half, second_half