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import json
import toggle_game as tg


def recieve_game(game_fp) -> dict:
    """
    Load game in from json string, returning game dict
    Raises exception on invalid game
    """
    game = json.load(game_fp)
    if game['size'] < 0 or game['size'] > 100:
        raise Exception("Invalid Board size")
    if game['size'] != len(game['board']):
        raise Exception("Game size and Board size do not match")
    if game['finished']:
        raise Exception("The game is finished")
    if game['human_turn']:
        raise Exception("Not the computer's turn")
    if game['version'] != "0.0.0":
        raise Exception("Invalid version")
    return game


def create_game(length: int) -> None:
    return {
            'size': length,
            'finished': False,
            'board': [True] * length,
            'turn': 0,
            'version': '0.0.0',
            'human_turn': ,
            'winner': ''
            }

def send_game(game: dict) -> str:
    game_json = json.dumps(game)
    return game_json.encode('utf-8')


def play_game(game: dict) -> None:
    if game['turn'] == 0:
        game['human_turn'] = not tg.P(game['size']) > 0
        game['turn'] += 1

    if game['human_turn']:
        return

    game['turn'] += 1
    i = tg.find_move(game)
    game['board'] = tg.make_move(game, i)
    game['human_turn'] = True
    game['finished'] = tg.i_have_won(game)
    if game['finished']:
        game['winner'] = 'Computer'


def application(env, start_response):
    headers = [('Content-Type', 'application/json')]
    start_response('200 OK', headers)

    query = env['QUERY_STRING']
    path_info = env['PATH_INFO']
    match env['REQUEST_METHOD'], env['PATH_INFO']:
        case ('GET', '/toggle/newgame'):
            # TODO: return descriptive status code
            game = create_game(query['size'])
            return [send_game(game)]
        case ('POST', '/toggle/play'):
            # TODO: return descriptive status code
            try:
                game = recieve_game(env['wsgi.input'])
            except json.JSONDecodeError:
                return [json.dumps({'Error': 'json parsing error, is your request formatted correctly?'}).encode('utf-8')]
            play_game(game)
            return [send_game(game)]
        case ('DELETE', _):
            start_response('405 Method Not Allowed', headers)
        case _:
            start_response('404 Not Found', headers)


    return [json.dumps({'not_post': True}).encode('utf-8')]


def main():
    pass