from typing import Dict, Optional, TypedDict

from django.db.models import Q
from django.utils.timezone import now as timezone_now

from zerver.lib.users import check_user_can_access_all_users, get_accessible_user_ids
from zerver.models import Realm, UserProfile, UserStatus


class UserInfoDict(TypedDict, total=False):
    status_text: str
    emoji_name: str
    emoji_code: str
    reaction_type: str
    away: bool


class RawUserInfoDict(TypedDict):
    user_profile_id: int
    user_profile__presence_enabled: bool
    status_text: str
    emoji_name: str
    emoji_code: str
    reaction_type: str


def format_user_status(row: RawUserInfoDict) -> UserInfoDict:
    # Deprecated way for clients to access the user's `presence_enabled`
    # setting, with away != presence_enabled. Can be removed when clients
    # migrate "away" (also referred to as "unavailable") feature to directly
    # use and update the user's presence_enabled setting.
    presence_enabled = row["user_profile__presence_enabled"]
    away = not presence_enabled
    status_text = row["status_text"]
    emoji_name = row["emoji_name"]
    emoji_code = row["emoji_code"]
    reaction_type = row["reaction_type"]

    dct: UserInfoDict = {}
    if away:
        dct["away"] = away
    if status_text:
        dct["status_text"] = status_text
    if emoji_name:
        dct["emoji_name"] = emoji_name
        dct["emoji_code"] = emoji_code
        dct["reaction_type"] = reaction_type

    return dct


def get_user_status_dict(realm: Realm, user_profile: UserProfile) -> Dict[str, UserInfoDict]:
    query = UserStatus.objects.filter(
        user_profile__realm_id=realm.id,
        user_profile__is_active=True,
    ).exclude(
        Q(user_profile__presence_enabled=True)
        & Q(status_text="")
        & Q(emoji_name="")
        & Q(emoji_code="")
        & Q(reaction_type=UserStatus.UNICODE_EMOJI),
    )

    if not check_user_can_access_all_users(user_profile):
        accessible_user_ids = get_accessible_user_ids(realm, user_profile)
        query = query.filter(user_profile_id__in=accessible_user_ids)

    rows = query.values(
        "user_profile_id",
        "user_profile__presence_enabled",
        "status_text",
        "emoji_name",
        "emoji_code",
        "reaction_type",
    )

    user_dict: Dict[str, UserInfoDict] = {}
    for row in rows:
        user_id = row["user_profile_id"]
        user_dict[str(user_id)] = format_user_status(row)

    return user_dict


def update_user_status(
    user_profile_id: int,
    status_text: Optional[str],
    client_id: int,
    emoji_name: Optional[str],
    emoji_code: Optional[str],
    reaction_type: Optional[str],
) -> None:
    timestamp = timezone_now()

    defaults = dict(
        client_id=client_id,
        timestamp=timestamp,
    )

    if status_text is not None:
        defaults["status_text"] = status_text

    if emoji_name is not None:
        defaults["emoji_name"] = emoji_name

        if emoji_code is not None:
            defaults["emoji_code"] = emoji_code

        if reaction_type is not None:
            defaults["reaction_type"] = reaction_type

    UserStatus.objects.update_or_create(
        user_profile_id=user_profile_id,
        defaults=defaults,
    )