"""
Commands for managing the Guild's settings.
"""

from typing import Optional

import nextcord
from nextcord.ext import commands
from sqlalchemy import select

# pylint: disable=import-error
from highscores import CategoryGroup, Guild, session
from utilities.utils import autofill_groups


class SettingsManagementCog(commands.Cog, name="Settings Management"):
    """
    Class holds commands for managing Guild's settings.
    """

    def __init__(self) -> None:
        """
        Default constructor for SettingsManagement class. Does nothing.
        """

    @nextcord.slash_command(default_member_permissions=nextcord.Permissions(administrator=True))
    async def register(self, interaction: nextcord.Interaction):
        """
        Parent slash command, never called.
        """

    @register.subcommand(description="Registers the channel for a Category Group's messages.")
    async def group_output_channel(
        self,
        interaction: nextcord.Interaction,
        category_group: nextcord.SlashOption(description="Category Group to assign to channel.", required=True),
        channel: Optional[nextcord.abc.GuildChannel] = nextcord.SlashOption(
            description="Channel to register",
            required=False,
            channel_types=[nextcord.ChannelType.text],
            default=None,
        ),
    ) -> None:
        """
        Command function to register a CategoryGroup's output channel.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            channel (nextcord.abc.GuildChannel, optional): Channel to register
                Is a SlashOption. Limited to text channels, Defaults to None.
        """
        if not channel:
            channel = interaction.channel
        channel_id = channel.id
        stmt = (
            select(CategoryGroup)
            .where(CategoryGroup.GuildId == interaction.guild_id)
            .where(CategoryGroup.GroupId == category_group)
        )
        group = session.scalar(stmt)
        group.ChannelId = channel_id
        session.commit()
        await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)

    @register.subcommand(description="Registers the channel for submission messages.")
    async def submission(
        self,
        interaction: nextcord.Interaction,
        channel: Optional[nextcord.abc.GuildChannel] = nextcord.SlashOption(
            description="Channel to register",
            required=False,
            channel_types=[nextcord.ChannelType.text],
            default=None,
        ),
    ) -> None:
        """
        Command function to register the submission message channel.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            channel Optional[nextcord.abc.GuildChannel], optional): Channel to register
                Is a SlashOption. Limited to text channels, Defaults to None.
        """
        if not channel:
            channel = interaction.channel
        channel_id = channel.id
        stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
        guild = session.scalar(stmt)
        guild.SubmissionChannel = channel_id
        session.commit()
        await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)

    @register.subcommand(description="Registers the channel for verification messages.")
    async def verify(
        self,
        interaction: nextcord.Interaction,
        channel: Optional[nextcord.abc.GuildChannel] = nextcord.SlashOption(
            description="Channel to register",
            required=False,
            channel_types=[nextcord.ChannelType.text],
            default=None,
        ),
    ) -> None:
        """
        Command function to register the verification message channel.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            channel (Optional[nextcord.abc.GuildChannel], optional): Channel to register
                Is a SlashOption. Limited to text channels, Defaults to None.
        """
        if not channel:
            channel = interaction.channel
        channel_id = channel.id
        stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
        guild = session.scalar(stmt)
        guild.VerificationChannel = channel_id
        session.commit()
        await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)

    @nextcord.slash_command(default_member_permissions=nextcord.Permissions(administrator=True))
    async def set(self, interaction: nextcord.Interaction):
        """
        Parent slash command for setting settings. Never called.
        """

    @set.subcommand(
        description="Set character length for a category. Can cut off username/score. Affects all categories."
    )
    async def category_pad_length(
        self,
        interaction: nextcord.Interaction,
        category_group: nextcord.SlashOption(description="Category Group to assign to channel.", required=True),
        length: Optional[int] = nextcord.SlashOption(description="Number of characters.", required=True, default=26),
    ) -> None:
        """
        Changes guild's category pad length.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            length (Optional[int]): Number of characters. Is SlashOption. Defaults to 26.
        """

        stmt = (
            select(CategoryGroup)
            .where(CategoryGroup.GuildId == interaction.guild_id)
            .where(CategoryGroup.GroupId == category_group)
        )
        group = session.scalar(stmt)
        group.PadLength = length
        session.commit()
        await interaction.response.send_message(
            f"Category pad length set to {length} for {group.GroupName}", ephemeral=True
        )

    @group_output_channel.on_autocomplete("category_group")
    @category_pad_length.on_autocomplete("category_group")
    async def group_id_autocomplete(self, interaction: nextcord.Interaction, category_group: str):
        """
        Sends results from autofill_groups back to group_output_channel for autocompletion of categoru_group.

        Args:
            interaction (nextcord.Interaction): Interaction with command.
            category_group (str): String to run autocompletion against.
        """
        await interaction.response.send_autocomplete(autofill_groups(interaction.guild_id, category_group))

    @set.subcommand(description="Set username length. Limits all submissions to this length.")
    async def username_length(
        self,
        interaction: nextcord.Interaction,
        length: Optional[int] = nextcord.SlashOption(description="Number of characters.", required=True, default=12),
    ) -> None:
        """
        Changes guild's username length limit.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            length (Optional[int]): Number of charactesr. Is SlashOption. Defaults to 12.
        """

        stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
        guild = session.scalar(stmt)
        guild.UsernameLength = length
        session.commit()
        await interaction.response.send_message(f"Username length set to {length}", ephemeral=True)