from functools import wraps
import uuid

from flask import Blueprint, abort, request, current_app, jsonify

from db import db, Game, CoordSet, GuessSet
from lib import generate_coord, score

game = Blueprint("game", __name__)


def require_name():
    name = request.headers.get("Authorization", type=str)
    if name is None:
        abort(401)
    return name.split(maxsplit=1)[-1]


def require_game(game_id):
    g = Game.query.get(game_id)
    if g is None:
        abort(404)
    return g


def require_guess_set(game_id):
    name = require_name()
    gs = GuessSet.query.get((game_id, name))
    if gs is None:
        abort(404)
    return gs


@game.route("", methods=["PUT"])
def create_game():
    name = require_name()
    timer = request.json.get("timer", None)
    if not isinstance(timer, int) or timer <= 0:
        abort(400)

    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())

    key = current_app.config["GOOGLE_API_KEY"]
    cs = CoordSet()
    for round_num in "12345":
        coord = generate_coord(key)
        while coord is None:
            # very unlikely, but it is possible for generate_coord to fail
            coord = generate_coord(key)
        cs.set_coord(round_num, *coord)
    db.session.add(cs)
    db.session.commit()

    new_game = Game(
        game_id=game_id,
        timer=timer,
        creator=name,
        coord_set=cs
    )
    db.session.add(new_game)
    db.session.commit()

    gs = GuessSet(game_id=game_id, player_name=name, coord_set=CoordSet())
    db.session.add(gs)
    db.session.commit()

    return jsonify({
        "gameId": game_id
    })


@game.route("/<game_id>")
def game_settings(game_id):
    g = require_game(game_id)

    return jsonify({
        "gameId": g.game_id,
        "creator": g.creator,
        "timer": g.timer,
        "coords": g.coord_set.to_dict(),
        "players": sorted([
            {
                "name": gs.player_name,
                "currentRound": gs.get_current_round(),
                "totalScore": gs.get_total_score(),
                "guesses": gs.to_dict(),
            } for gs in g.guess_sets
        ], key=lambda x: x["totalScore"] or 0, reverse=True),
    })


@game.route("/<game_id>/join", methods=["POST"])
def join(game_id):
    name = require_name()
    g = require_game(game_id)

    if GuessSet.query.get((g.game_id, name)) is not None:
        abort(409)

    cs = CoordSet()
    db.session.add(cs)
    db.session.commit()

    gs = GuessSet(game_id=g.game_id, player_name=name, coord_set=cs)
    db.session.add(gs)
    db.session.commit()
    return "", 201


@game.route("/<game_id>/guesses")
def guesses(game_id):
    gs = require_guess_set(game_id)
    return jsonify({
        "currentRound": gs.get_current_round(),
        "guesses": gs.to_dict(),
    })


@game.route("/<game_id>/guesses/<round_num>", methods=["POST"])
def make_guess(game_id, round_num):
    gs = require_guess_set(game_id)
    if round_num != gs.get_current_round():
        abort(409)

    timed_out = request.json.get("timeout", False)
    if timed_out:
        gs.set_timed_out(round_num)
        db.session.commit()
        return jsonify({
            "score": 0,
            "totalScore": gs.get_total_score(),
        }), 201

    lat = request.json.get("lat", None)
    lng = request.json.get("lng", None)
    if not isinstance(lat, float) or not isinstance(lng, float):
        abort(400)

    target = require_game(game_id).coord_set.get_coord(round_num)
    guess_score = score(target, (lat, lng))
    gs.set_guess(round_num, lat, lng, guess_score)
    db.session.commit()
    return jsonify({
        "score": guess_score,
        "totalScore": gs.get_total_score(),
    }), 201