"""Provide the Redditor class."""

from __future__ import annotations

from json import dumps
from typing import TYPE_CHECKING, Any

from praw.const import API_PATH
from praw.models.listing.mixins import RedditorListingMixin
from praw.models.reddit.base import RedditBase
from praw.models.reddit.mixins import FullnameMixin, MessageableMixin
from praw.models.util import stream_generator
from praw.util.cache import cachedproperty

if TYPE_CHECKING:
    from collections.abc import Iterator

    import praw.models


class Redditor(MessageableMixin, RedditorListingMixin, FullnameMixin, RedditBase):
    """A class representing the users of Reddit.

    .. include:: ../../typical_attributes.rst

    .. note::

        Shadowbanned accounts are treated the same as non-existent accounts, meaning
        that they will not have any attributes.

    .. note::

        Suspended/banned accounts will only return the ``name`` and ``is_suspended``
        attributes.

    ====================== =============================================================
    Attribute              Description
    ====================== =============================================================
    ``comment_karma``      The comment karma for the :class:`.Redditor`.
    ``comments``           Provide an instance of :class:`.SubListing` for comment
                           access.
    ``submissions``        Provide an instance of :class:`.SubListing` for submission
                           access.
    ``created_utc``        Time the account was created, represented in `Unix Time`_.
    ``has_verified_email`` Whether or not the :class:`.Redditor` has verified their
                           email.
    ``icon_img``           The url of the Redditors' avatar.
    ``id``                 The ID of the :class:`.Redditor`.
    ``is_employee``        Whether or not the :class:`.Redditor` is a Reddit employee.
    ``is_friend``          Whether or not the :class:`.Redditor` is friends with the
                           authenticated user.
    ``is_mod``             Whether or not the :class:`.Redditor` mods any subreddits.
    ``is_gold``            Whether or not the :class:`.Redditor` has active Reddit
                           Premium status.
    ``is_suspended``       Whether or not the :class:`.Redditor` is currently suspended.
    ``link_karma``         The link karma for the :class:`.Redditor`.
    ``name``               The Redditor's username.
    ``subreddit``          If the :class:`.Redditor` has created a user-subreddit,
                           provides a :class:`.UserSubreddit` with additional
                           attributes.
    ====================== =============================================================

    .. _unix time: https://en.wikipedia.org/wiki/Unix_time

    """

    STR_FIELD = "name"

    @classmethod
    def from_data(cls, reddit: praw.Reddit, data: dict[str, Any]) -> Redditor | None:
        """Return an instance of :class:`.Redditor`, or ``None`` from ``data``."""
        if data == "[deleted]":
            return None
        return cls(reddit, data)

    @cachedproperty
    def notes(self) -> praw.models.RedditorModNotes:
        """Provide an instance of :class:`.RedditorModNotes`.

        This provides an interface for managing moderator notes for a redditor.

        .. note::

            The authenticated user must be a moderator of the provided subreddit(s).

        For example, all the notes for u/spez in r/test can be iterated through like so:

        .. code-block:: python

            redditor = reddit.redditor("spez")

            for note in redditor.notes.subreddits("test"):
                print(f"{note.label}: {note.note}")

        """
        from praw.models.mod_notes import RedditorModNotes  # noqa: PLC0415

        return RedditorModNotes(self._reddit, self)

    @cachedproperty
    def stream(self) -> praw.models.reddit.redditor.RedditorStream:
        """Provide an instance of :class:`.RedditorStream`.

        Streams can be used to indefinitely retrieve new comments made by a redditor,
        like:

        .. code-block:: python

            for comment in reddit.redditor("spez").stream.comments():
                print(comment)

        Additionally, new submissions can be retrieved via the stream. In the following
        example all submissions are fetched via the redditor u/spez:

        .. code-block:: python

            for submission in reddit.redditor("spez").stream.submissions():
                print(submission)

        """
        return RedditorStream(self)

    @property
    def _kind(self) -> str:
        """Return the class's kind."""
        return self._reddit.config.kinds["redditor"]

    @property
    def _path(self) -> str:
        return API_PATH["user"].format(user=self)

    def __init__(
        self,
        reddit: praw.Reddit,
        name: str | None = None,
        fullname: str | None = None,
        _data: dict[str, Any] | None = None,
    ) -> None:
        """Initialize a :class:`.Redditor` instance.

        :param reddit: An instance of :class:`.Reddit`.
        :param name: The name of the redditor.
        :param fullname: The fullname of the redditor, starting with ``t2_``.

        Exactly one of ``name``, ``fullname`` or ``_data`` must be provided.

        """
        if sum(1 for value in (name, fullname, _data) if value is not None) != 1:
            msg = "Exactly one of 'name', 'fullname', or '_data' must be provided."
            raise TypeError(msg)
        if _data:
            assert (  # noqa: PT018
                isinstance(_data, dict) and "name" in _data
            ), "Please file a bug with PRAW."
        self._listing_use_sort = True
        if name:
            self.name = name
        elif fullname:
            self._fullname = fullname
        super().__init__(reddit, _data=_data, _extra_attribute_to_check="_fullname")

    def __setattr__(self, name: str, value: Any) -> None:
        """Objectify the subreddit attribute."""
        if name == "subreddit" and value:
            from praw.models.reddit.user_subreddit import UserSubreddit  # noqa: PLC0415

            value = UserSubreddit(reddit=self._reddit, _data=value)
        super().__setattr__(name, value)

    def _fetch(self) -> None:
        data = self._fetch_data()
        data = data["data"]
        other = type(self)(self._reddit, _data=data)
        self.__dict__.update(other.__dict__)
        super()._fetch()

    def _fetch_info(self) -> tuple[str, dict[str, str], None]:
        if hasattr(self, "_fullname"):
            self.name = self._fetch_username(self._fullname)
        return "user_about", {"user": self.name}, None

    def _fetch_username(self, fullname: str) -> str:
        return self._reddit.get(API_PATH["user_by_fullname"], params={"ids": fullname})[fullname]["name"]

    def _friend(self, *, data: dict[str, Any], method: str) -> None:
        url = API_PATH["friend_v1"].format(user=self)
        self._reddit.request(data=dumps(data), method=method, path=url)

    def block(self) -> None:
        """Block the :class:`.Redditor`.

        For example, to block :class:`.Redditor` u/spez:

        .. code-block:: python

            reddit.redditor("spez").block()

        .. note::

            Blocking a trusted user will remove that user from your trusted list.

        .. seealso::

            :meth:`.trust`

        """
        self._reddit.post(API_PATH["block_user"], params={"name": self.name})

    def distrust(self) -> None:
        """Remove the :class:`.Redditor` from your whitelist of trusted users.

        For example, to remove :class:`.Redditor` u/spez from your whitelist:

        .. code-block:: python

            reddit.redditor("spez").distrust()

        .. seealso::

            :meth:`.trust`

        """
        self._reddit.post(API_PATH["remove_whitelisted"], data={"name": self.name})

    def friend(self, *, note: str | None = None) -> None:
        """Friend the :class:`.Redditor`.

        :param note: A note to save along with the relationship. Requires Reddit Premium
            (default: ``None``).

        Calling this method subsequent times will update the note.

        For example, to friend u/spez:

        .. code-block:: python

            reddit.redditor("spez").friend()

        To add a note to the friendship (requires Reddit Premium):

        .. code-block:: python

            reddit.redditor("spez").friend(note="My favorite admin")

        """
        self._friend(data={"note": note} if note else {}, method="PUT")

    def friend_info(self) -> praw.models.Redditor:
        """Return a :class:`.Redditor` instance with specific friend-related attributes.

        :returns: A :class:`.Redditor` instance with fields ``date``, ``id``, and
            possibly ``note`` if the authenticated user has Reddit Premium.

        For example, to get the friendship information of :class:`.Redditor` u/spez:

        .. code-block:: python

            info = reddit.redditor("spez").friend_info
            friend_data = info.date

        """
        return self._reddit.get(API_PATH["friend_v1"].format(user=self))

    def moderated(self) -> list[praw.models.Subreddit]:
        """Return a list of the redditor's moderated subreddits.

        :returns: A list of :class:`.Subreddit` objects. Return ``[]`` if the redditor
            has no moderated subreddits.

        :raises: ``prawcore.ServerError`` in certain circumstances. See the note below.

        .. note::

            The redditor's own user profile subreddit will not be returned, but other
            user profile subreddits they moderate will be returned.

        Usage:

        .. code-block:: python

            for subreddit in reddit.redditor("spez").moderated():
                print(subreddit.display_name)
                print(subreddit.title)

        .. note::

            A ``prawcore.ServerError`` exception may be raised if the redditor moderates
            a large number of subreddits. If that happens, try switching to
            :ref:`read-only mode <read_only_application>`. For example,

            .. code-block:: python

                reddit.read_only = True
                for subreddit in reddit.redditor("reddit").moderated():
                    print(str(subreddit))

            It is possible that requests made in read-only mode will also raise a
            ``prawcore.ServerError`` exception.

            When used in read-only mode, this method does not retrieve information about
            subreddits that require certain special permissions to access, e.g., private
            subreddits and premium-only subreddits.

        .. seealso::

            :meth:`.User.moderator_subreddits`

        """
        return self._reddit.get(API_PATH["moderated"].format(user=self)) or []

    def multireddits(self) -> list[praw.models.Multireddit]:
        """Return a list of the redditor's public multireddits.

        For example, to to get :class:`.Redditor` u/spez's multireddits:

        .. code-block:: python

            multireddits = reddit.redditor("spez").multireddits()

        """
        return self._reddit.get(API_PATH["multireddit_user"].format(user=self))

    def trophies(self) -> list[praw.models.Trophy]:
        """Return a list of the redditor's trophies.

        :returns: A list of :class:`.Trophy` objects. Return ``[]`` if the redditor has
            no trophies.

        :raises: :class:`.RedditAPIException` if the redditor doesn't exist.

        Usage:

        .. code-block:: python

            for trophy in reddit.redditor("spez").trophies():
                print(trophy.name)
                print(trophy.description)

        """
        return list(self._reddit.get(API_PATH["trophies"].format(user=self)))

    def trust(self) -> None:
        """Add the :class:`.Redditor` to your whitelist of trusted users.

        Trusted users will always be able to send you PMs.

        Example usage:

        .. code-block:: python

            reddit.redditor("AaronSw").trust()

        Use the ``accept_pms`` parameter of :meth:`.Preferences.update` to toggle your
        ``accept_pms`` setting between ``"everyone"`` and ``"whitelisted"``. For
        example:

        .. code-block:: python

            # Accept private messages from everyone:
            reddit.user.preferences.update(accept_pms="everyone")
            # Only accept private messages from trusted users:
            reddit.user.preferences.update(accept_pms="whitelisted")

        You may trust a user even if your ``accept_pms`` setting is switched to
        ``"everyone"``.

        .. note::

            You are allowed to have a user on your blocked list and your friends list at
            the same time. However, you cannot trust a user who is on your blocked list.

        .. seealso::

            - :meth:`.distrust`
            - :meth:`.Preferences.update`
            - :meth:`.trusted`

        """
        self._reddit.post(API_PATH["add_whitelisted"], data={"name": self.name})

    def unblock(self) -> None:
        """Unblock the :class:`.Redditor`.

        For example, to unblock :class:`.Redditor` u/spez:

        .. code-block:: python

            reddit.redditor("spez").unblock()

        """
        data = {
            "container": self._reddit.user.me().fullname,
            "name": str(self),
            "type": "enemy",
        }
        url = API_PATH["unfriend"].format(subreddit="all")
        self._reddit.post(url, data=data)

    def unfriend(self) -> None:
        """Unfriend the :class:`.Redditor`.

        For example, to unfriend :class:`.Redditor` u/spez:

        .. code-block:: python

            reddit.redditor("spez").unfriend()

        """
        self._friend(data={"id": str(self)}, method="DELETE")


class RedditorStream:
    """Provides submission and comment streams."""

    def __init__(self, redditor: praw.models.Redditor) -> None:
        """Initialize a :class:`.RedditorStream` instance.

        :param redditor: The redditor associated with the streams.

        """
        self.redditor = redditor

    def comments(self, **stream_options: str | int | dict[str, str]) -> Iterator[praw.models.Comment]:
        """Yield new comments as they become available.

        Comments are yielded oldest first. Up to 100 historical comments will initially
        be returned.

        Keyword arguments are passed to :func:`.stream_generator`.

        For example, to retrieve all new comments made by redditor u/spez, try:

        .. code-block:: python

            for comment in reddit.redditor("spez").stream.comments():
                print(comment)

        """
        return stream_generator(self.redditor.comments.new, **stream_options)

    def submissions(self, **stream_options: str | int | dict[str, str]) -> Iterator[praw.models.Submission]:
        """Yield new submissions as they become available.

        Submissions are yielded oldest first. Up to 100 historical submissions will
        initially be returned.

        Keyword arguments are passed to :func:`.stream_generator`.

        For example, to retrieve all new submissions made by redditor u/spez, try:

        .. code-block:: python

            for submission in reddit.redditor("spez").stream.submissions():
                print(submission)

        """
        return stream_generator(self.redditor.submissions.new, **stream_options)
