import hashlib
import logging
import re
from datetime import datetime, timedelta, tzinfo

import pytz
import requests
from django.apps import apps
from django.contrib.auth import get_user_model
from django.db import models
from django.utils import timezone
from profiles.models import UserProfile
from profiles.utils import now_user_timezone
from scrobbles.constants import LONG_PLAY_MEDIA
from scrobbles.tasks import (
    process_koreader_import,
    process_lastfm_import,
    process_retroarch_import,
)
from webdav.client import get_webdav_client

logger = logging.getLogger(__name__)
User = get_user_model()


def timestamp_user_tz_to_utc(timestamp: int, user_tz: tzinfo) -> datetime:
    return user_tz.localize(datetime.utcfromtimestamp(timestamp)).astimezone(
        pytz.utc
    )


def convert_to_seconds(run_time: str) -> int:
    """Jellyfin sends run time as 00:00:00 string. We want the run time to
    actually be in seconds so we'll convert it"

    This is actually deprecated, as we now convert to seconds before saving.
    But for older videos, we'll leave this here.
    """
    run_time_int = 0
    if ":" in str(run_time):
        run_time_list = run_time.split(":")
        hours = int(run_time_list[0])
        minutes = int(run_time_list[1])
        seconds = int(run_time_list[2])
        run_time_int = int((((hours * 60) + minutes) * 60) + seconds)
    return run_time_int


def get_scrobbles_for_media(media_obj, user: User) -> models.QuerySet:
    Scrobble = apps.get_model(app_label="scrobbles", model_name="Scrobble")

    media_query = None
    media_class = media_obj.__class__.__name__
    if media_class == "Book":
        media_query = models.Q(book=media_obj)
    if media_class == "VideoGame":
        media_query = models.Q(video_game=media_obj)
    if media_class == "Brickset":
        media_query = models.Q(brickset=media_obj)
    if media_class == "Task":
        media_query = models.Q(task=media_obj)

    if not media_query:
        logger.warn(f"Do not know about media {media_class} 🙍")
        return QuerySet()
    return Scrobble.objects.filter(media_query, user=user)


def get_recently_played_board_games(user: User) -> dict:
    ...


def get_long_plays_in_progress(user: User) -> dict:
    """Find all books where the last scrobble is not marked complete"""
    media_dict = {
        "active": [],
        "inactive": [],
    }
    now = now_user_timezone(user.profile)
    for app, model in LONG_PLAY_MEDIA.items():
        media_obj = apps.get_model(app_label=app, model_name=model)
        for media in media_obj.objects.all():
            last_scrobble = media.scrobble_set.filter(user=user).last()
            if last_scrobble and last_scrobble.long_play_complete == False:
                days_past = (now - last_scrobble.timestamp).days
                if days_past > 7:
                    media_dict["inactive"].append(media)
                else:
                    media_dict["active"].append(media)
    media_dict["active"].reverse()
    media_dict["inactive"].reverse()
    return media_dict


def get_long_plays_completed(user: User) -> list:
    """Find all books where the last scrobble is not marked complete"""
    media_list = []
    for app, model in LONG_PLAY_MEDIA.items():
        media_obj = apps.get_model(app_label=app, model_name=model)
        for media in media_obj.objects.all():
            if (
                media.scrobble_set.all()
                and media.scrobble_set.filter(user=user)
                .order_by("timestamp")
                .last()
                .long_play_complete
                == True
            ):
                media_list.append(media)
    return media_list


def import_lastfm_for_all_users(restart=False):
    """Grab a list of all users with LastFM enabled and kickoff imports for them"""
    LastFmImport = apps.get_model("scrobbles", "LastFMImport")
    lastfm_enabled_user_ids = UserProfile.objects.filter(
        lastfm_username__isnull=False,
        lastfm_password__isnull=False,
        lastfm_auto_import=True,
    ).values_list("user_id", flat=True)

    lastfm_import_count = 0

    for user_id in lastfm_enabled_user_ids:
        lfm_import, created = LastFmImport.objects.get_or_create(
            user_id=user_id, processed_finished__isnull=True
        )
        if not created and not restart:
            logger.info(
                f"Not resuming failed LastFM import {lfm_import.id} for user {user_id}, use restart=True to restart"
            )
            continue
        process_lastfm_import.delay(lfm_import.id)
        lastfm_import_count += 1
    return lastfm_import_count


def import_retroarch_for_all_users(restart=False):
    """Grab a list of all users with Retroarch enabled and kickoff imports for them"""
    RetroarchImport = apps.get_model("scrobbles", "RetroarchImport")
    retroarch_enabled_user_ids = UserProfile.objects.filter(
        retroarch_path__isnull=False,
        retroarch_auto_import=True,
    ).values_list("user_id", flat=True)

    retroarch_import_count = 0

    for user_id in retroarch_enabled_user_ids:
        retroarch_import, created = RetroarchImport.objects.get_or_create(
            user_id=user_id, processed_finished__isnull=True
        )
        if not created and not restart:
            logger.info(
                f"Not resuming failed LastFM import {retroarch_import.id} for user {user_id}, use restart=True to restart"
            )
            continue
        process_retroarch_import.delay(retroarch_import.id)
        retroarch_import_count += 1
    return retroarch_import_count


def delete_zombie_scrobbles(dry_run=True):
    """Look for any scrobble over a day old that is not paused and still in progress and delete it"""
    Scrobble = apps.get_model("scrobbles", "Scrobble")
    now = timezone.now()
    three_days_ago = now - timedelta(days=3)

    # TODO This should be part of a custom manager
    zombie_scrobbles = Scrobble.objects.filter(
        timestamp__lte=three_days_ago,
        is_paused=False,
        played_to_completion=False,
    )

    zombies_found = zombie_scrobbles.count()

    if not dry_run:
        logger.info(f"Deleted {zombies_found} zombie scrobbles")
        zombie_scrobbles.delete()
        return zombies_found

    logger.info(
        f"Found {zombies_found} zombie scrobbles to delete, use dry_run=False to proceed"
    )
    return zombies_found


def import_from_webdav_for_all_users(restart=False):
    """Grab a list of all users with WebDAV enabled and kickoff imports for them"""
    from scrobbles.models import KoReaderImport
    from books.koreader import fetch_file_from_webdav

    # LastFmImport = apps.get_model("scrobbles", "LastFMImport")
    webdav_enabled_user_ids = UserProfile.objects.filter(
        webdav_url__isnull=False,
        webdav_user__isnull=False,
        webdav_pass__isnull=False,
        webdav_auto_import=True,
    ).values_list("user_id", flat=True)
    logger.info(
        f"start import of {webdav_enabled_user_ids.count()} webdav accounts"
    )

    koreader_import_count = 0

    for user_id in webdav_enabled_user_ids:
        webdav_client = get_webdav_client(user_id)

        try:
            webdav_client.info("var/koreader/statistics.sqlite3")
            koreader_found = True
        except:
            koreader_found = False
            logger.info(
                "no koreader stats file found on webdav",
                extra={"user_id": user_id},
            )

        if koreader_found:
            last_import = (
                KoReaderImport.objects.filter(
                    user_id=user_id, processed_finished__isnull=False
                )
                .order_by("processed_finished")
                .last()
            )

            koreader_file_path = fetch_file_from_webdav(1)
            new_hash = get_file_md5_hash(koreader_file_path)
            old_hash = None
            if last_import:
                old_hash = last_import.file_md5_hash()

            if old_hash and new_hash == old_hash:
                logger.info(
                    "koreader stats file has not changed",
                    extra={
                        "user_id": user_id,
                        "new_hash": new_hash,
                        "old_hash": old_hash,
                        "last_import_id": last_import.id,
                    },
                )
                continue

            koreader_import, created = KoReaderImport.objects.get_or_create(
                user_id=user_id, processed_finished__isnull=True
            )

            if not created and not restart:
                logger.info(
                    f"Not resuming failed KoReader import {koreader_import.id} for user {user_id}, use restart=True to restart"
                )
                continue

            koreader_import.save_sqlite_file_to_self(koreader_file_path)

            process_koreader_import.delay(koreader_import.id)
            koreader_import_count += 1
    return koreader_import_count


def media_class_to_foreign_key(media_class: str) -> str:
    return re.sub(r"(?<!^)(?=[A-Z])", "_", media_class).lower()


def get_file_md5_hash(file_path: str) -> str:
    with open(file_path, "rb") as f:
        file_hash = hashlib.md5()
        while chunk := f.read(8192):
            file_hash.update(chunk)
    return file_hash.hexdigest()


def deduplicate_tracks():
    from music.models import Track

    # TODO This whole thing should iterate over users
    dups = []

    for t in Track.objects.all():
        if Track.objects.filter(title=t.title, artist=t.artist).exists():
            dups.append(t)

    for b in dups:
        tracks = Track.objects.filter(artist=b.artist, title=b.title)
        first = tracks.first()
        for other in tracks.exclude(id=first.id):
            print("moving scrobbles for ", other.id, " to ", first.id)
            other.scrobble_set.update(track=first)
            print("deleting ", other.id, " - ", other)
            other.delete()


def send_notifications_for_scrobble(scrobble_id):
    from scrobbles.models import Scrobble

    scrobble = Scrobble.objects.get(id=scrobble_id)
    profile = scrobble.user.profile
    if profile and profile.ntfy_enabled and profile.ntfy_url:
        # TODO allow prority and tags to be configured in the profile
        notify_str = f"{scrobble.media_obj}"
        if scrobble.log and scrobble.log.get("description"):
            notify_str += f" - {scrobble.log.get('description')}"
        requests.post(
            profile.ntfy_url,
            data=notify_str.encode(encoding="utf-8"),
            headers={
                "Title": scrobble.media_obj.strings.verb,
                "Priority": scrobble.media_obj.strings.priority,
                "Tags": scrobble.media_obj.strings.tags,
            },
        )