import uuid

from flask_sqlalchemy import SQLAlchemy

from lib import generate_coord

db = SQLAlchemy()
session = db.session


class Game(db.Model):
    game_id = db.Column(db.String, primary_key=True)
    timer = db.Column(db.Integer)
    rounds = db.Column(db.Integer)
    coordinates = db.relationship("Coordinate", lazy=True, order_by="Coordinate.round_number")
    players = db.relationship("Player", lazy=True)

    @staticmethod
    def create(timer, creator, rounds=5):
        game_id = str(uuid.uuid4())
        while Game.query.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=timer,
            rounds=rounds
        )
        db.session.add(new_game)

        for round_num in range(rounds):
            (lat, lng) = generate_coord()
            coord = Coordinate(
                game_id=game_id,
                round_number=round_num+1,
                latitude=lat,
                longitude=lng
            )
            db.session.add(coord)

        new_game.join(creator) # commits the session

        return new_game

    def join(self, player_name):
        p = Player(
            game_id=self.game_id,
            player_name=player_name
        )
        db.session.add(p)
        db.session.commit()

    def to_dict(self):
        return {
            "gameId": self.game_id,
            "timer": self.timer,
            "rounds": self.rounds,
            "coords": [{
                str(c.round_number): {
                    "lat": c.latitude,
                    "lng": c.longitude,
                }
            } for c in self.coordinates],
            "players": [p.to_dict() for p in self.players],
        }


class Player(db.Model):
    player_id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    game_id = db.Column(db.String, db.ForeignKey("game.game_id"))
    player_name = db.Column(db.String)
    guesses = db.relationship("Guess", lazy=True, order_by="Guess.round_number")

    def get_total_score(self):
        return sum(g.round_score for g in self.guesses)

    def get_current_round(self):
        if len(self.guesses) == 0:
            return 1
        next_round = self.guesses[-1].round_number + 1
        if next_round <= Game.query.get(self.game_id).rounds:
            return next_round
        return None

    def add_guess(self, round_num, lat, lng, score):
        g = Guess(
            player_id=self.player_id,
            round_number=round_num,
            latitude=lat,
            longitude=lng,
            round_score=score,
        )
        db.session.add(g)
        db.session.commit()

    def add_timeout(self, round_num):
        self.add_guess(round_num, -200, -200, 0)

    def to_dict(self):
        return {
            "name": self.player_name,
            "currentRound": self.get_current_round(),
            "totalScore": self.get_total_score(),
            "guesses": [{
                str(g.round_number): {
                    "lat": g.latitude,
                    "lng": g.longitude,
                    "score": g.round_score,
                }
            } for g in self.guesses],
        }


class Coordinate(db.Model):
    game_id = db.Column(db.String, db.ForeignKey("game.game_id"), primary_key=True)
    round_number = db.Column(db.Integer, primary_key=True, autoincrement=False)
    latitude = db.Column(db.Float)
    longitude = db.Column(db.Float)


class Guess(db.Model):
    player_id = db.Column(db.String, db.ForeignKey("player.player_id"), primary_key=True)
    round_number = db.Column(db.Integer, primary_key=True, autoincrement=False)
    latitude = db.Column(db.Float)
    longitude = db.Column(db.Float)
    round_score = db.Column(db.Integer)