import uuid
from typing import List, Tuple, Union
from datetime import datetime

from sqlalchemy.orm import Session

from .models import Game, Coordinate, Player, Guess
from .. import schemas


def create_game(db: Session, conf: schemas.GameConfig, coords: List[Tuple[str, float, float]]) -> str:
    if len(coords) != conf.rounds:
        raise ValueError("Insufficient number of coordinates")
    
    game_id = str(uuid.uuid4())
    while db.query(Game).get(game_id) is not None:
        # basically impossible collision, but let's be safe
        game_id = str(uuid.uuid4())
    
    new_game = Game(
        game_id=game_id,
        timer=conf.timer,
        rounds=conf.rounds,
        country_lock=conf.country_lock,
        generation_method=conf.generation_method,
        game_mode=conf.game_mode,
        clock_mode=conf.clock_mode,
        score_method=conf.score_method,
        round_point_cap=conf.round_point_cap,
        created_at=datetime.now(),
    )
    db.add(new_game)
    db.add_all([Coordinate(
        game_id=game_id,
        round_number=round_num + 1,
        country_code=cc,
        latitude=lat,
        longitude=lng,
    ) for (round_num, (cc, lat, lng)) in enumerate(coords)])
    db.commit()

    return game_id


def get_recent_games(db: Session, count: int) -> List[Game]:
    return db.query(Game).order_by(Game.created_at.desc()).limit(count).all()


def get_game(db: Session, game_id: str) -> Game:
    return db.query(Game).get(game_id)


def join_game(db: Session, game_id: str, player_name: str) -> str:
    existing = db.query(Player).filter(Player.game_id == game_id, Player.player_name == player_name).first()
    if existing is not None:
        return None
    new_player = Player(game_id=game_id, player_name=player_name)
    db.add(new_player)
    db.commit()
    return str(new_player.player_id)


def link_game(db: Session, game_id: str, linked_game: str):
    db.query(Game).get(game_id).linked_game = linked_game
    db.commit()


def get_player(db: Session, player_id: str) -> Player:
    return db.query(Player).get(int(player_id))


def get_total_score(player: Player) -> int:
    return sum(g.round_score or 0 for g in player.guesses)


def get_next_round_number(player: Player) -> int:
    if len(player.guesses) == 0:
        return 1
    next_round = player.guesses[-1].round_number + 1
    if next_round <= player.game.rounds:
        return next_round
    return None


def get_coordinate(db: Session, game_id: str, round_number: int) -> Coordinate:
    return db.query(Coordinate).get((game_id, round_number))


def get_next_coordinate(db: Session, player: Player) -> Coordinate:
    round_number = get_next_round_number(player)
    if round_number is None:
        return None
    return get_coordinate(db, player.game_id, round_number)


def get_next_round_time(player: Player) -> int:
    if player.game.clock_mode == schemas.ClockModeEnum.time_bank:
        if len(player.guesses) == 0:
            return player.game.timer * player.game.rounds
        return player.guesses[-1].time_remaining
    return player.game.timer


def add_guess(db: Session, guess: schemas.Guess, player: Player, country_code: Union[str, None], round_number: int, score: int) -> bool:
    existing = db.query(Guess).filter(Guess.player_id == player.player_id, Guess.round_number == round_number).first()
    if existing is not None:
        return False
    g = Guess(
        player_id=player.player_id,
        round_number=round_number,
        latitude=guess.lat,
        longitude=guess.lng,
        country_code=country_code,
        round_score=score,
        time_remaining=guess.time_remaining,
    )
    db.add(g)
    db.commit()
    if guess.time_remaining <= 0 and player.game.clock_mode == schemas.ClockModeEnum.time_bank:
        for r in range(round_number, player.game.rounds):
            add_timeout(db, player, r + 1)
    return True


def add_timeout(db: Session, player: Player, round_number: int) -> bool:
    return add_guess(db, schemas.Guess(lat=0, lng=0, time_remaining=0), player, None, round_number, None)


def get_first_submitter(db: Session, game_id: str, round_number: int) -> str:
    first = db.query(Player.player_name, Guess).filter(
            Player.game_id == game_id,
            Guess.round_number == round_number,
            Player.player_id == Guess.player_id,
        ).order_by(Guess.created_at.desc()).first()
    if first is None:
        return None
    return first[0]