from datetime import datetime
from binascii import hexlify
from gevent.event import Event
from steam.steamid import SteamID
from steam.enums import EFriendRelationship, EPersonaState

class SteamUser(object):
    """Holds various functionality and data related to a steam user
    """
    _pstate = None
    steam_id = SteamID()
    relationship = EFriendRelationship.No   #: friendship status

    def __new__(cls, steam_id, *args, **kwargs):
        return super(SteamUser, cls).__new__(cls, steam_id)

    def __init__(self, steam_id, steam):
        self._pstate_ready = Event()
        self._steam = steam
        self.steam_id = SteamID(steam_id)

    def __repr__(self):
        return "<%s(%s, %s)>" % (
            self.__class__.__name__,
            str(self.steam_id),
            self.state,
            )

    def get_ps(self, field_name, wait_pstate=True):
        if not wait_pstate or self._pstate_ready.wait(timeout=30):
            if self._pstate and self._pstate.HasField(field_name):
                return getattr(self._pstate, field_name)
        return None

    @property
    def last_logon(self):
        """:rtype: :class:`datetime`, :class:`None`"""
        ts = self.get_ps('last_logon')
        return datetime.utcfromtimestamp(ts) if ts else None

    @property
    def last_logoff(self):
        """:rtype: :class:`datetime`, :class:`None`"""
        ts = self.get_ps('last_logoff')
        return datetime.utcfromtimestamp(ts) if ts else None

    @property
    def name(self):
        """Name of the steam user, or ``None`` if it's not available

        :rtype: :class:`str`, :class:`None`
        """
        return self.get_ps('player_name')

    @property
    def state(self):
        """Personsa state (e.g. Online, Offline, Away, Busy, etc)

        :rtype: :class:`.EPersonaState`
        """
        state = self.get_ps('persona_state', False)
        return EPersonaState(state) if state else EPersonaState.Offline

    def get_avatar_url(self, size=2):
        """Get URL to avatar picture

        :param size: possible values are ``0``, ``1``, or ``2`` corresponding to small, medium, large
        :type size: :class:`int`
        :return: url to avatar
        :rtype: :class:`str`
        """
        hashbytes = self.get_ps('avatar_hash')

        if hashbytes != "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000":
            ahash = hexlify(hashbytes).decode('ascii')
        else:
            ahash = 'fef49e7fa7e1997310d705b2a6158ff8dc1cdfeb'

        sizes = {
            0: '',
            1: '_medium',
            2: '_full',
        }
        url = "http://cdn.akamai.steamstatic.com/steamcommunity/public/images/avatars/%s/%s%s.jpg"

        return url % (ahash[:2], ahash, sizes[size])