# Released under the MIT License. See LICENSE for details.
#
"""Functionality related to teams sessions."""
from __future__ import annotations

import copy
import random
from typing import TYPE_CHECKING

import _ba
from ba._session import Session
from ba._error import NotFoundError, print_error

if TYPE_CHECKING:
    from typing import Any, Sequence
    import ba

DEFAULT_TEAM_COLORS = ((0.1, 0.25, 1.0), (1.0, 0.25, 0.2))
DEFAULT_TEAM_NAMES = ('Blue', 'Red')


class MultiTeamSession(Session):
    """Common base class for ba.DualTeamSession and ba.FreeForAllSession.

    Category: **Gameplay Classes**

    Free-for-all-mode is essentially just teams-mode with each ba.Player having
    their own ba.Team, so there is much overlap in functionality.
    """

    # These should be overridden.
    _playlist_selection_var = 'UNSET Playlist Selection'
    _playlist_randomize_var = 'UNSET Playlist Randomize'
    _playlists_var = 'UNSET Playlists'

    def __init__(self) -> None:
        """Set up playlists and launches a ba.Activity to accept joiners."""
        # pylint: disable=cyclic-import
        from ba import _playlist
        from bastd.activity.multiteamjoin import MultiTeamJoinActivity

        app = _ba.app
        cfg = app.config

        if self.use_teams:
            team_names = cfg.get('Custom Team Names', DEFAULT_TEAM_NAMES)
            team_colors = cfg.get('Custom Team Colors', DEFAULT_TEAM_COLORS)
        else:
            team_names = None
            team_colors = None

        # print('FIXME: TEAM BASE SESSION WOULD CALC DEPS.')
        depsets: Sequence[ba.DependencySet] = []

        super().__init__(
            depsets,
            team_names=team_names,
            team_colors=team_colors,
            min_players=1,
            max_players=self.get_max_players(),
        )

        self._series_length = app.teams_series_length
        self._ffa_series_length = app.ffa_series_length

        show_tutorial = cfg.get('Show Tutorial', True)

        self._tutorial_activity_instance: ba.Activity | None
        if show_tutorial:
            from bastd.tutorial import TutorialActivity

            # Get this loading.
            self._tutorial_activity_instance = _ba.newactivity(TutorialActivity)
        else:
            self._tutorial_activity_instance = None

        self._playlist_name = cfg.get(
            self._playlist_selection_var, '__default__'
        )
        self._playlist_randomize = cfg.get(self._playlist_randomize_var, False)

        # Which game activity we're on.
        self._game_number = 0

        playlists = cfg.get(self._playlists_var, {})

        if (
            self._playlist_name != '__default__'
            and self._playlist_name in playlists
        ):

            # Make sure to copy this, as we muck with it in place once we've
            # got it and we don't want that to affect our config.
            playlist = copy.deepcopy(playlists[self._playlist_name])
        else:
            if self.use_teams:
                playlist = _playlist.get_default_teams_playlist()
            else:
                playlist = _playlist.get_default_free_for_all_playlist()

        # Resolve types and whatnot to get our final playlist.
        playlist_resolved = _playlist.filter_playlist(
            playlist,
            sessiontype=type(self),
            add_resolved_type=True,
            name='default teams' if self.use_teams else 'default ffa',
        )
        default_playlist_resolved = _playlist.filter_playlist(
            _playlist.get_default_teams_playlist(),
            sessiontype=type(self),
            add_resolved_type=True,
            name='default teams' if self.use_teams else 'default ffa',
        )
        if not playlist_resolved:
            print("PLAYLIST CONTAINS NO VALID GAMES , FALLING BACK TO DEFAULT TEAM PLAYLIST")
            playlist_resolved = default_playlist_resolved
            # raise RuntimeError('Playlist contains no valid games.')

        self._playlist = ShuffleList(
            playlist_resolved, shuffle=self._playlist_randomize
        )

        # Get a game on deck ready to go.
        self._current_game_spec: dict[str, Any] | None = None
        self._next_game_spec: dict[str, Any] = self._playlist.pull_next()
        self._next_game: type[ba.GameActivity] = self._next_game_spec[
            'resolved_type'
        ]

        # Go ahead and instantiate the next game we'll
        # use so it has lots of time to load.
        self._instantiate_next_game()

        # Start in our custom join screen.
        self.setactivity(_ba.newactivity(MultiTeamJoinActivity))

    def get_ffa_series_length(self) -> int:
        """Return free-for-all series length."""
        return self._ffa_series_length

    def get_series_length(self) -> int:
        """Return teams series length."""
        return self._series_length

    def get_next_game_description(self) -> ba.Lstr:
        """Returns a description of the next game on deck."""
        # pylint: disable=cyclic-import
        from ba._gameactivity import GameActivity

        gametype: type[GameActivity] = self._next_game_spec['resolved_type']
        assert issubclass(gametype, GameActivity)
        return gametype.get_settings_display_string(self._next_game_spec)

    def get_game_number(self) -> int:
        """Returns which game in the series is currently being played."""
        return self._game_number

    def on_team_join(self, team: ba.SessionTeam) -> None:
        team.customdata['previous_score'] = team.customdata['score'] = 0

    def get_max_players(self) -> int:
        """Return max number of ba.Player-s allowed to join the game at once"""
        if self.use_teams:
            return _ba.app.config.get('Team Game Max Players', 8)
        return _ba.app.config.get('Free-for-All Max Players', 8)

    def _instantiate_next_game(self) -> None:
        self._next_game_instance = _ba.newactivity(
            self._next_game_spec['resolved_type'],
            self._next_game_spec['settings'],
        )

    def on_activity_end(self, activity: ba.Activity, results: Any) -> None:
        # pylint: disable=cyclic-import
        from bastd.tutorial import TutorialActivity
        from bastd.activity.multiteamvictory import (
            TeamSeriesVictoryScoreScreenActivity,
        )
        from ba._activitytypes import (
            TransitionActivity,
            JoinActivity,
            ScoreScreenActivity,
        )

        # If we have a tutorial to show, that's the first thing we do no
        # matter what.
        if self._tutorial_activity_instance is not None:
            self.setactivity(self._tutorial_activity_instance)
            self._tutorial_activity_instance = None

        # If we're leaving the tutorial activity, pop a transition activity
        # to transition us into a round gracefully (otherwise we'd snap from
        # one terrain to another instantly).
        elif isinstance(activity, TutorialActivity):
            self.setactivity(_ba.newactivity(TransitionActivity))

        # If we're in a between-round activity or a restart-activity, hop
        # into a round.
        elif isinstance(
            activity, (JoinActivity, TransitionActivity, ScoreScreenActivity)
        ):

            # If we're coming from a series-end activity, reset scores.
            if isinstance(activity, TeamSeriesVictoryScoreScreenActivity):
                self.stats.reset()
                self._game_number = 0
                for team in self.sessionteams:
                    team.customdata['score'] = 0

            # Otherwise just set accum (per-game) scores.
            else:
                self.stats.reset_accum()

            next_game = self._next_game_instance

            self._current_game_spec = self._next_game_spec
            self._next_game_spec = self._playlist.pull_next()
            self._game_number += 1

            # Instantiate the next now so they have plenty of time to load.
            self._instantiate_next_game()

            # (Re)register all players and wire stats to our next activity.
            for player in self.sessionplayers:
                # ..but only ones who have been placed on a team
                # (ie: no longer sitting in the lobby).
                try:
                    has_team = player.sessionteam is not None
                except NotFoundError:
                    has_team = False
                if has_team:
                    self.stats.register_sessionplayer(player)
            self.stats.setactivity(next_game)

            # Now flip the current activity.
            self.setactivity(next_game)

        # If we're leaving a round, go to the score screen.
        else:
            self._switch_to_score_screen(results)

    def _switch_to_score_screen(self, results: Any) -> None:
        """Switch to a score screen after leaving a round."""
        del results  # Unused arg.
        print_error('this should be overridden')

    def announce_game_results(
        self,
        activity: ba.GameActivity,
        results: ba.GameResults,
        delay: float,
        announce_winning_team: bool = True,
    ) -> None:
        """Show basic game result at the end of a game.

        (before transitioning to a score screen).
        This will include a zoom-text of 'BLUE WINS'
        or whatnot, along with a possible audio
        announcement of the same.
        """
        # pylint: disable=cyclic-import
        # pylint: disable=too-many-locals
        from ba._math import normalized_color
        from ba._general import Call
        from ba._gameutils import cameraflash
        from ba._language import Lstr
        from ba._freeforallsession import FreeForAllSession
        from ba._messages import CelebrateMessage

        _ba.timer(delay, Call(_ba.playsound, _ba.getsound('boxingBell')))

        if announce_winning_team:
            winning_sessionteam = results.winning_sessionteam
            if winning_sessionteam is not None:
                # Have all players celebrate.
                celebrate_msg = CelebrateMessage(duration=10.0)
                assert winning_sessionteam.activityteam is not None
                for player in winning_sessionteam.activityteam.players:
                    if player.actor:
                        player.actor.handlemessage(celebrate_msg)
                cameraflash()

                # Some languages say "FOO WINS" different for teams vs players.
                if isinstance(self, FreeForAllSession):
                    wins_resource = 'winsPlayerText'
                else:
                    wins_resource = 'winsTeamText'
                wins_text = Lstr(
                    resource=wins_resource,
                    subs=[('${NAME}', winning_sessionteam.name)],
                )
                activity.show_zoom_message(
                    wins_text,
                    scale=0.85,
                    color=normalized_color(winning_sessionteam.color),
                )


class ShuffleList:
    """Smart shuffler for game playlists.

    (avoids repeats in maps or game types)
    """

    def __init__(self, items: list[dict[str, Any]], shuffle: bool = True):
        self.source_list = items
        self.shuffle = shuffle
        self.shuffle_list: list[dict[str, Any]] = []
        self.last_gotten: dict[str, Any] | None = None

    def pull_next(self) -> dict[str, Any]:
        """Pull and return the next item on the shuffle-list."""

        # Refill our list if its empty.
        if not self.shuffle_list:
            self.shuffle_list = list(self.source_list)

        # Ok now find an index we should pull.
        index = 0

        if self.shuffle:
            for _i in range(4):
                index = random.randrange(0, len(self.shuffle_list))
                test_obj = self.shuffle_list[index]

                # If the new one is the same map or game-type as the previous,
                # lets try to keep looking.
                if len(self.shuffle_list) > 1 and self.last_gotten is not None:
                    if (
                        test_obj['settings']['map']
                        == self.last_gotten['settings']['map']
                    ):
                        continue
                    if test_obj['type'] == self.last_gotten['type']:
                        continue

                # Sufficiently different; lets go with it.
                break

        obj = self.shuffle_list.pop(index)
        self.last_gotten = obj
        return obj