"""Package providing reddit class mixins."""
from json import dumps

from ....const import API_PATH
from .editable import EditableMixin
from .fullname import FullnameMixin
from .gildable import GildableMixin
from .inboxable import InboxableMixin
from .inboxtoggleable import InboxToggleableMixin
from .messageable import MessageableMixin
from .replyable import ReplyableMixin
from .reportable import ReportableMixin
from .savable import SavableMixin
from .votable import VotableMixin


class ThingModerationMixin:
    """Provides moderation methods for Comments and Submissions."""

    REMOVAL_MESSAGE_API = None

    def _add_removal_reason(self, mod_note="", reason_id=None):
        """Add a removal reason for a Comment or Submission.

        :param mod_note: A message for the other moderators.
        :param reason_id: The removal reason ID.

        It is necessary to first call :meth:`~.remove` on the
        :class:`~.Comment` or :class:`~.Submission`.

        If ``reason_id`` is not specified, ``mod_note`` cannot be blank.

        """
        if not reason_id and not mod_note:
            raise ValueError("mod_note cannot be blank if reason_id is not specified")
        # Only the first element of the item_id list is used.
        data = {
            "item_ids": [self.thing.fullname],
            "mod_note": mod_note,
            "reason_id": reason_id,
        }
        self.thing._reddit.post(API_PATH["removal_reasons"], data={"json": dumps(data)})

    def approve(self):
        """Approve a :class:`~.Comment` or :class:`~.Submission`.

        Approving a comment or submission reverts a removal, resets the report
        counter, adds a green check mark indicator (only visible to other
        moderators) on the website view, and sets the ``approved_by`` attribute
        to the authenticated user.

        Example usage:

        .. code-block:: python

           # approve a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.approve()
           # approve a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.approve()

        """
        self.thing._reddit.post(API_PATH["approve"], data={"id": self.thing.fullname})

    def distinguish(self, how="yes", sticky=False):
        """Distinguish a :class:`~.Comment` or :class:`~.Submission`.

        :param how: One of "yes", "no", "admin", "special". "yes" adds a
            moderator level distinguish. "no" removes any distinction. "admin"
            and "special" require special user privileges to use.
        :param sticky: Comment is stickied if ``True``, placing it at the top
            of the comment page regardless of score. If thing is not a
            top-level comment, this parameter is silently ignored.

        Example usage:

        .. code-block:: python

           # distinguish and sticky a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.distinguish(how="yes", sticky=True)
           # undistinguish a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.distinguish(how="no")

        .. seealso:: :meth:`~.undistinguish`

        """
        data = {"how": how, "id": self.thing.fullname}
        if sticky and getattr(self.thing, "is_root", False):
            data["sticky"] = True
        self.thing._reddit.post(API_PATH["distinguish"], data=data)

    def ignore_reports(self):
        """Ignore future reports on a :class:`~.Comment` or :class:`~.Submission`.

        Calling this method will prevent future reports on this Comment or
        Submission from both triggering notifications and appearing in the
        various moderation listings. The report count will still increment on
        the Comment or Submission.

        Example usage:

        .. code-block:: python

           # ignore future reports on a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.ignore_reports()
           # ignore future reports on a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.ignore_reports()

        .. seealso:: :meth:`~.unignore_reports`

        """
        self.thing._reddit.post(
            API_PATH["ignore_reports"], data={"id": self.thing.fullname}
        )

    def lock(self):
        """Lock a :class:`~.Comment` or :class:`~.Submission`.

        Example usage:

        .. code-block:: python

           # lock a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.lock()
           # lock a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.lock()

        .. seealso:: :meth:`~.unlock`

        """
        self.thing._reddit.post(API_PATH["lock"], data={"id": self.thing.fullname})

    def remove(self, spam=False, mod_note="", reason_id=None):
        """Remove a :class:`~.Comment` or :class:`~.Submission`.

        :param mod_note: A message for the other moderators.
        :param spam: When True, use the removal to help train the Subreddit's
            spam filter (default: False).
        :param reason_id: The removal reason ID.

        If either ``reason_id`` or ``mod_note`` are provided, a second API
        call is made to add the removal reason.

        Example usage:

        .. code-block:: python

           # remove a comment and mark as spam:
           comment = reddit.comment("dkk4qjd")
           comment.mod.remove(spam=True)
           # remove a submission
           submission = reddit.submission(id="5or86n")
           submission.mod.remove()
           # remove a submission with a removal reason
           reason = reddit.subreddit.mod.removal_reasons["110ni21zo23ql"]
           submission = reddit.submission(id="5or86n")
           submission.mod.remove(reason_id=reason.id)

        """
        data = {"id": self.thing.fullname, "spam": bool(spam)}
        self.thing._reddit.post(API_PATH["remove"], data=data)
        if any([reason_id, mod_note]):
            self._add_removal_reason(mod_note, reason_id)

    def send_removal_message(
        self,
        message,
        title="ignored",
        type="public",  # pylint: disable=redefined-builtin
    ):
        """Send a removal message for a :class:`~.Comment` or :class:`~.Submission`.

        .. warning:: The object has to be removed before giving it a removal
            reason. Remove the object with :meth:`.remove`. Trying to add a
            removal reason without removing the object will result in
            :class:`.RedditAPIException` being thrown with an ``INVALID_ID``
            error_type.

        Reddit adds human-readable information about the object to the message.

        :param type: One of "public", "private", "private_exposed".
            "public" leaves a stickied comment on the post.
            "private" sends a Modmail message with hidden username.
            "private_exposed" sends a Modmail message without hidden username.
        :param title: The short reason given in the message.
            (Ignored if type is "public".)
        :param message: The body of the message.

        If ``type`` is "public", the new :class:`~.Comment` is returned.
        """
        # The API endpoint used to send removal messages is different
        # for posts and comments, so the derived classes specify which one.
        if self.REMOVAL_MESSAGE_API is None:
            raise NotImplementedError("ThingModerationMixin must be extended.")
        url = API_PATH[self.REMOVAL_MESSAGE_API]

        # Only the first element of the item_id list is used.
        data = {
            "item_id": [self.thing.fullname],
            "message": message,
            "title": title,
            "type": type,
        }

        return self.thing._reddit.post(url, data={"json": dumps(data)}) or None

    def undistinguish(self):
        """Remove mod, admin, or special distinguishing from an object.

        Also unstickies the object if applicable.

        Example usage:

        .. code-block:: python

           # undistinguish a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.undistinguish()
           # undistinguish a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.undistinguish()

        .. seealso:: :meth:`~.distinguish`

        """
        self.distinguish(how="no")

    def unignore_reports(self):
        """Resume receiving future reports on a Comment or Submission.

        Future reports on this :class:`~.Comment` or :class:`~.Submission`
        will cause notifications, and appear in the various moderation
        listings.

        Example usage:

        .. code-block:: python

           # accept future reports on a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.unignore_reports()
           # accept future reports on a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.unignore_reports()

        .. seealso:: :meth:`~.ignore_reports`

        """
        self.thing._reddit.post(
            API_PATH["unignore_reports"], data={"id": self.thing.fullname}
        )

    def unlock(self):
        """Unlock a :class:`~.Comment` or :class:`~.Submission`.

        Example usage:

        .. code-block:: python

           # unlock a comment:
           comment = reddit.comment("dkk4qjd")
           comment.mod.unlock()
           # unlock a submission:
           submission = reddit.submission(id="5or86n")
           submission.mod.unlock()

        .. seealso:: :meth:`~.lock`

        """
        self.thing._reddit.post(API_PATH["unlock"], data={"id": self.thing.fullname})


class UserContentMixin(
    EditableMixin,
    GildableMixin,
    InboxToggleableMixin,
    ReplyableMixin,
    ReportableMixin,
    SavableMixin,
    VotableMixin,
):
    """A convenience mixin that applies to both Comments and Submissions."""
