import logging
import pickle
import typing as T
from datetime import datetime
from pathlib import Path

from pqcli.mechanic import Player


class Roster:
    def __init__(self, path: Path, players: T.List[Player]) -> None:
        self.path = path
        self.players = players
        self._last_save = datetime.now()

    @staticmethod
    def load(path: T.Union[str, Path]) -> "Roster":
        real_path = Path(path)
        if real_path.exists():
            return Roster(
                real_path, players=pickle.loads(real_path.read_bytes())
            )
        return Roster(real_path, players=[])

    def save(self) -> None:
        self._last_save = datetime.now()
        old_path = self.path.with_name(self.path.name + ".old")
        tmp_path = self.path.with_name(self.path.name + ".new")
        tmp_path.parent.mkdir(parents=True, exist_ok=True)
        tmp_path.write_bytes(pickle.dumps(self.players))
        if self.path.exists():
            if old_path.exists():
                old_path.unlink()
            self.path.rename(old_path)
        tmp_path.rename(self.path)

    def save_periodically(self) -> None:
        if (datetime.now() - self._last_save).total_seconds() >= 300:
            logging.info("Saving...")
            self.save()