# coding=utf-8
import datetime
import sys

from subzero.sandbox import restore_builtins

module = sys.modules['__main__']
restore_builtins(module, {})

globals = getattr(module, "__builtins__")["globals"]
for key, value in getattr(module, "__builtins__").iteritems():
    if key != "globals":
        globals()[key] = value

import logger

sys.modules["logger"] = logger

import subliminal
import support

import interface
sys.modules["interface"] = interface

from subzero.constants import OS_PLEX_USERAGENT, PERSONAL_MEDIA_IDENTIFIER
from interface.menu import *
from support.plex_media import media_to_videos, get_media_item_ids, scan_videos
from support.subtitlehelpers import get_subtitles_from_metadata
from support.storage import whack_missing_parts, save_subtitles
from support.items import is_ignored
from support.config import config
from support.lib import get_intent
from support.helpers import track_usage, get_title_for_video_metadata, get_identifier, cast_bool
from support.history import get_history


def Start():
    HTTP.CacheTime = 0
    HTTP.Headers['User-agent'] = OS_PLEX_USERAGENT

    # configured cache to be in memory as per https://github.com/Diaoul/subliminal/issues/303
    subliminal.region.configure('dogpile.cache.memory')

    # clear expired intents
    intent = get_intent()
    intent.cleanup()

    # clear expired menu history items
    now = datetime.datetime.now()
    if "menu_history" in Dict:
        for key, timeout in Dict["menu_history"].items():
            if now > timeout:
                del Dict["menu_history"][key]

    # init defaults; perhaps not the best idea to use ValidatePrefs here, but we'll see
    ValidatePrefs()
    Log.Debug(config.full_version)

    if not config.permissions_ok:
        Log.Error("Insufficient permissions on library folders:")
        for title, path in config.missing_permissions:
            Log.Error("Insufficient permissions on library %s, folder: %s" % (title, path))
        return

    # run task scheduler
    scheduler.run()

    if "anon_id" not in Dict:
        Dict["anon_id"] = get_identifier()

    # track usage
    if cast_bool(Prefs["track_usage"]):
        if "first_use" not in Dict:
            Dict["first_use"] = datetime.datetime.utcnow()
            Dict.Save()
            track_usage("General", "plugin", "first_start", 1)
        else:
            track_usage("General", "plugin", "start", 1)


def download_best_subtitles(video_part_map, min_score=0):
    hearing_impaired = Prefs['subtitles.search.hearingImpaired']
    languages = config.lang_list
    if not languages:
        return

    missing_languages = False
    for video, part in video_part_map.iteritems():
        if not Prefs['subtitles.save.filesystem']:
            # scan for existing metadata subtitles
            meta_subs = get_subtitles_from_metadata(part)
            for language, subList in meta_subs.iteritems():
                if subList:
                    video.subtitle_languages.add(language)
                    Log.Debug("Found metadata subtitle %s for %s", language, video)

        missing_subs = (languages - video.subtitle_languages)

        # all languages are found if we either really have subs for all languages or we only want to have exactly one language
        # and we've only found one (the case for a selected language, Prefs['subtitles.only_one'] (one found sub matches any language))
        found_one_which_is_enough = len(video.subtitle_languages) >= 1 and Prefs['subtitles.only_one']
        if not missing_subs or found_one_which_is_enough:
            if found_one_which_is_enough:
                Log.Debug('Only one language was requested, and we\'ve got a subtitle for %s', video)
            else:
                Log.Debug('All languages %r exist for %s', languages, video)
            continue
        missing_languages = True
        break

    if missing_languages:
        Log.Debug("Download best subtitles using settings: min_score: %s, hearing_impaired: %s" % (min_score, hearing_impaired))

        return subliminal.api.download_best_subtitles(video_part_map.keys(), languages, min_score, hearing_impaired, providers=config.providers,
                                                      provider_configs=config.provider_settings)
    Log.Debug("All languages for all requested videos exist. Doing nothing.")


def update_local_media(metadata, media, media_type="movies"):
    # Look for subtitles
    if media_type == "movies":
        for item in media.items:
            for part in item.parts:
                support.localmedia.find_subtitles(part)
        return

    # Look for subtitles for each episode.
    for s in media.seasons:
        # If we've got a date based season, ignore it for now, otherwise it'll collide with S/E folders/XML and PMS
        # prefers date-based (why?)
        if int(s) < 1900 or metadata.guid.startswith(PERSONAL_MEDIA_IDENTIFIER):
            for e in media.seasons[s].episodes:
                for i in media.seasons[s].episodes[e].items:

                    # Look for subtitles.
                    for part in i.parts:
                        support.localmedia.find_subtitles(part)
        else:
            pass


class SubZeroAgent(object):
    agent_type = None
    agent_type_verbose = None
    languages = [Locale.Language.English]
    primary_provider = False
    score_prefs_key = None

    def __init__(self, *args, **kwargs):
        super(SubZeroAgent, self).__init__(*args, **kwargs)
        self.agent_type = "movies" if isinstance(self, Agent.Movies) else "series"
        self.name = "Sub-Zero Subtitles (%s, %s)" % (self.agent_type_verbose, config.get_version())

    def search(self, results, media, lang):
        Log.Debug("Sub-Zero %s, %s search" % (config.version, self.agent_type))
        results.Append(MetadataSearchResult(id='null', score=100))

    def update(self, metadata, media, lang):
        Log.Debug("Sub-Zero %s, %s update called" % (config.version, self.agent_type))
        intent = get_intent()

        if not media:
            Log.Error("Called with empty media, something is really wrong with your setup!")
            return

        item_ids = []
        try:
            config.init_subliminal_patches()
            videos = media_to_videos(media, kind=self.agent_type)

            # media ignored?
            use_any_parts = False
            for video in videos:
                if is_ignored(video["id"]):
                    Log.Debug(u"Ignoring %s" % video)
                    continue
                use_any_parts = True

            if not use_any_parts:
                Log.Debug(u"Nothing to do.")
                return

            set_refresh_menu_state(media, media_type=self.agent_type)

            try:
                use_score = int(Prefs[self.score_prefs_key].strip())
            except ValueError:
                Log.Error("Please only put numbers into the scores setting. Exiting")
                return

            # scanned_video_part_map = {subliminal.Video: plex_part, ...}
            scanned_video_part_map = scan_videos(videos, kind=self.agent_type)

            # downloaded_subtitles = {subliminal.Video: [subtitle, subtitle, ...]}
            downloaded_subtitles = download_best_subtitles(scanned_video_part_map, min_score=use_score)
            item_ids = get_media_item_ids(media, kind=self.agent_type)

            whack_missing_parts(scanned_video_part_map)

            if downloaded_subtitles:
                save_subtitles(scanned_video_part_map, downloaded_subtitles)
                track_usage("Subtitle", "refreshed", "download", 1)

                for video, video_subtitles in downloaded_subtitles.items():
                    # store item(s) in history
                    for subtitle in video_subtitles:
                        item_title = get_title_for_video_metadata(video.plexapi_metadata, add_section_title=False)
                        history = get_history()
                        history.add(item_title, video.id, section_title=video.plexapi_metadata["section"],
                                    subtitle=subtitle)

            update_local_media(metadata, media, media_type=self.agent_type)

        finally:
            # update the menu state
            set_refresh_menu_state(None)

            # notify any running tasks about our finished update
            for item_id in item_ids:
                scheduler.signal("updated_metadata", item_id)

                # resolve existing intent for that id
                intent.resolve("force", item_id)

            Dict.Save()


class SubZeroSubtitlesAgentMovies(SubZeroAgent, Agent.Movies):
    contributes_to = ['com.plexapp.agents.imdb', 'com.plexapp.agents.xbmcnfo', 'com.plexapp.agents.themoviedb', 'com.plexapp.agents.hama']
    score_prefs_key = "subtitles.search.minimumMovieScore1"
    agent_type_verbose = "Movies"


class SubZeroSubtitlesAgentTvShows(SubZeroAgent, Agent.TV_Shows):
    contributes_to = ['com.plexapp.agents.thetvdb', 'com.plexapp.agents.themoviedb',
                      'com.plexapp.agents.thetvdbdvdorder', 'com.plexapp.agents.xbmcnfotv', 'com.plexapp.agents.hama']
    score_prefs_key = "subtitles.search.minimumTVScore1"
    agent_type_verbose = "TV"