# NOTE: this file contains backports or unintroduced features of next versions of dpy (as for 1.7.3)
# TODO: nuke this file when Red is changed its version to support required features
# from @fixator10
from discord import Role
from discord.http import Route
from discord.utils import _bytes_to_base64_data


async def edit_role_icon(bot, role: Role, reason=None, **fields):
    """|coro|

    Changes specified role's icon

    Parameters
    -----------
    role: :class:`discord.Role`
        A role to edit
    icon: :class:`bytes`
        A :term:`py:bytes-like object` representing the image to upload.
    unicode_emoji: :class:`str`
        A unicode emoji to set
    reason: Optional[:class:`str`]
        The reason for editing this role. Shows up on the audit log.

    Raises
    -------
    Forbidden
        You do not have permissions to change the role.
    HTTPException
        Editing the role failed.
    InvalidArgument
        Wrong image format passed for ``icon``.
        :param bot:
    """
    if "unicode_emoji" in fields:
        fields["icon"] = None
    else:
        try:
            icon_bytes = fields["icon"]
        except KeyError:
            pass
        else:
            if icon_bytes is not None:
                fields["icon"] = _bytes_to_base64_data(icon_bytes)
            else:
                fields["icon"] = None

    r = Route("PATCH", "/guilds/{guild_id}/roles/{role_id}", guild_id=role.guild.id, role_id=role.id)
    await bot.http.request(r, json=fields, reason=reason)