import datetime
import os
import shutil
import time

import redis
from celery.exceptions import SoftTimeLimitExceeded
from django.conf import settings

from apps.profile.middleware import DBProfilerMiddleware
from newsblur_web.celeryapp import app
from utils import log as logging
from utils.redis_raw_log_middleware import RedisDumpMiddleware

FEED_TASKING_MAX = 10000


@app.task(name="task-feeds")
def TaskFeeds():
    from apps.rss_feeds.models import Feed

    settings.LOG_TO_STREAM = True
    now = datetime.datetime.utcnow()
    start = time.time()
    r = redis.Redis(connection_pool=settings.REDIS_FEED_UPDATE_POOL)
    tasked_feeds_size = r.zcard("tasked_feeds")

    hour_ago = now - datetime.timedelta(hours=1)
    r.zremrangebyscore("fetched_feeds_last_hour", 0, int(hour_ago.strftime("%s")))

    now_timestamp = int(now.strftime("%s"))
    queued_feeds = r.zrangebyscore("scheduled_updates", 0, now_timestamp)
    r.zremrangebyscore("scheduled_updates", 0, now_timestamp)
    if not queued_feeds:
        logging.debug(" ---> ~SN~FB~BMNo feeds to queue! Exiting...")
        return

    r.sadd("queued_feeds", *queued_feeds)
    logging.debug(
        " ---> ~SN~FBQueuing ~SB%s~SN stale feeds (~SB%s~SN/~FG%s~FB~SN/%s tasked/queued/scheduled)"
        % (len(queued_feeds), r.zcard("tasked_feeds"), r.scard("queued_feeds"), r.zcard("scheduled_updates"))
    )

    # Regular feeds
    if tasked_feeds_size < FEED_TASKING_MAX:
        feeds = r.srandmember("queued_feeds", FEED_TASKING_MAX)
        Feed.task_feeds(feeds, verbose=True)
        active_count = len(feeds)
    else:
        logging.debug(" ---> ~SN~FBToo many tasked feeds. ~SB%s~SN tasked." % tasked_feeds_size)
        active_count = 0
        feeds = []

    logging.debug(
        " ---> ~SN~FBTasking %s feeds took ~SB%s~SN seconds (~SB%s~SN/~FG%s~FB~SN/%s tasked/queued/scheduled)"
        % (
            active_count,
            int((time.time() - start)),
            r.zcard("tasked_feeds"),
            r.scard("queued_feeds"),
            r.zcard("scheduled_updates"),
        )
    )
    logging.debug(" ---> ~FBFeeds being tasked: ~SB%s" % feeds)


@app.task(name="task-broken-feeds")
def TaskBrokenFeeds():
    from apps.rss_feeds.models import Feed

    settings.LOG_TO_STREAM = True
    now = datetime.datetime.utcnow()
    start = time.time()
    r = redis.Redis(connection_pool=settings.REDIS_FEED_UPDATE_POOL)

    logging.debug(" ---> ~SN~FBQueuing broken feeds...")

    # Force refresh feeds
    refresh_feeds = Feed.objects.filter(active=True, fetched_once=False, active_subscribers__gte=1).order_by(
        "?"
    )[:100]
    refresh_count = refresh_feeds.count()
    cp1 = time.time()

    logging.debug(" ---> ~SN~FBFound %s active, unfetched broken feeds" % refresh_count)

    # Mistakenly inactive feeds
    hours_ago = (now - datetime.timedelta(minutes=10)).strftime("%s")
    old_tasked_feeds = r.zrangebyscore("tasked_feeds", 0, hours_ago)
    inactive_count = len(old_tasked_feeds)
    if inactive_count:
        r.zremrangebyscore("tasked_feeds", 0, hours_ago)
        # r.sadd('queued_feeds', *old_tasked_feeds)
        for feed_id in old_tasked_feeds:
            r.zincrby("error_feeds", 1, feed_id)
            feed = Feed.get_by_id(feed_id)
            feed.set_next_scheduled_update()
    logging.debug(
        " ---> ~SN~FBRe-queuing ~SB%s~SN dropped/broken feeds (~SB%s/%s~SN queued/tasked)"
        % (inactive_count, r.scard("queued_feeds"), r.zcard("tasked_feeds"))
    )
    cp2 = time.time()

    old = now - datetime.timedelta(days=1)
    old_feeds = Feed.objects.filter(next_scheduled_update__lte=old, active_subscribers__gte=1).order_by("?")[
        :500
    ]
    old_count = old_feeds.count()
    cp3 = time.time()

    logging.debug(
        " ---> ~SN~FBTasking ~SBrefresh:~FC%s~FB inactive:~FC%s~FB old:~FC%s~SN~FB broken feeds... (%.4s/%.4s/%.4s)"
        % (
            refresh_count,
            inactive_count,
            old_count,
            cp1 - start,
            cp2 - cp1,
            cp3 - cp2,
        )
    )

    Feed.task_feeds(refresh_feeds, verbose=False)
    Feed.task_feeds(old_feeds, verbose=False)

    logging.debug(
        " ---> ~SN~FBTasking broken feeds took ~SB%s~SN seconds (~SB%s~SN/~FG%s~FB~SN/%s tasked/queued/scheduled)"
        % (
            int((time.time() - start)),
            r.zcard("tasked_feeds"),
            r.scard("queued_feeds"),
            r.zcard("scheduled_updates"),
        )
    )


@app.task(name="update-feeds", time_limit=10 * 60, soft_time_limit=9 * 60, ignore_result=True)
def UpdateFeeds(feed_pks):
    from apps.rss_feeds.models import Feed
    from apps.statistics.models import MStatistics

    r = redis.Redis(connection_pool=settings.REDIS_FEED_UPDATE_POOL)

    mongodb_replication_lag = int(MStatistics.get("mongodb_replication_lag", 0))
    compute_scores = bool(mongodb_replication_lag < 10)

    profiler = DBProfilerMiddleware()
    profiler_activated = profiler.process_celery()
    if profiler_activated:
        settings.MONGO_COMMAND_LOGGER.process_celery(profiler)
        redis_middleware = RedisDumpMiddleware()
        redis_middleware.process_celery(profiler)

    options = {
        "quick": float(MStatistics.get("quick_fetch", 0)),
        "updates_off": MStatistics.get("updates_off", False),
        "compute_scores": compute_scores,
        "mongodb_replication_lag": mongodb_replication_lag,
    }

    if not isinstance(feed_pks, list):
        feed_pks = [feed_pks]

    for feed_pk in feed_pks:
        feed = Feed.get_by_id(feed_pk)
        if not feed or feed.pk != int(feed_pk):
            logging.info(
                " ---> ~FRRemoving feed_id %s from tasked_feeds queue, points to %s..."
                % (feed_pk, feed and feed.pk)
            )
            r.zrem("tasked_feeds", feed_pk)
        if not feed:
            continue
        try:
            feed.update(**options)
        except SoftTimeLimitExceeded as e:
            feed.save_feed_history(505, "Timeout", e)
            logging.info(" ---> [%-30s] ~BR~FWTime limit hit!~SB~FR Moving on to next feed..." % feed)
        if profiler_activated:
            profiler.process_celery_finished()


@app.task(name="new-feeds", time_limit=10 * 60, soft_time_limit=9 * 60, ignore_result=True)
def NewFeeds(feed_pks):
    from apps.rss_feeds.models import Feed

    if not isinstance(feed_pks, list):
        feed_pks = [feed_pks]

    options = {}
    for feed_pk in feed_pks:
        feed = Feed.get_by_id(feed_pk)
        if not feed:
            continue
        feed.update(options=options)


@app.task(name="push-feeds", ignore_result=True)
def PushFeeds(feed_id, xml):
    from apps.rss_feeds.models import Feed
    from apps.statistics.models import MStatistics

    mongodb_replication_lag = int(MStatistics.get("mongodb_replication_lag", 0))
    compute_scores = bool(mongodb_replication_lag < 60)

    options = {
        "feed_xml": xml,
        "compute_scores": compute_scores,
        "mongodb_replication_lag": mongodb_replication_lag,
    }
    feed = Feed.get_by_id(feed_id)
    if feed:
        feed.update(options=options)


@app.task()
def ScheduleImmediateFetches(feed_ids, user_id=None):
    from apps.rss_feeds.models import Feed

    if not isinstance(feed_ids, list):
        feed_ids = [feed_ids]

    Feed.schedule_feed_fetches_immediately(feed_ids, user_id=user_id)


@app.task()
def SchedulePremiumSetup(feed_ids):
    from apps.rss_feeds.models import Feed

    if not isinstance(feed_ids, list):
        feed_ids = [feed_ids]

    Feed.setup_feeds_for_premium_subscribers(feed_ids)


@app.task()
def ScheduleCountTagsForUser(user_id):
    from apps.rss_feeds.models import MStarredStoryCounts

    MStarredStoryCounts.count_for_user(user_id)