"""
Set command heirarchy.
"""

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

# pylint: disable=import-error
from database_setup.sql_data_classes import CategoryGroup, Guild, engine
from utilities.utils import MAX_LINE_LENGTH, autofill_groups


class SetCog(commands.Cog, name="Set command."):
    """
    Class holds commands for setting variables in guild's database.
    """

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

    @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="Registers the channel for a Category Group's messages.")
    async def group_output_channel(
        self,
        interaction: nextcord.Interaction,
        group_id: str = nextcord.SlashOption(
            name="group", description="Category Group to assign to channel.", required=True
        ),
        channel: nextcord.abc.GuildChannel | None = 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.
            group_id (str): String representation of Group id to register channel to. Is SlashOption.
            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
        with Session(engine) as session:
            stmt = (
                select(CategoryGroup)
                .where(CategoryGroup.GuildId == interaction.guild_id)
                .where(CategoryGroup.GroupId == int(group_id))
            )
            group = session.scalar(stmt)
            group.ChannelId = channel_id
            session.commit()
        await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)

    @set.subcommand(
        description="Set character length for a category. Can cut off username/score. Affects all categories."
    )
    async def pad_length(
        self,
        interaction: nextcord.Interaction,
        group_id: str = nextcord.SlashOption(
            name="group", description="Category Group to assign pad length to.", required=True
        ),
        length: int = nextcord.SlashOption(
            description="Number of characters alloted to a category.",
            required=True,
            default=26,
            min_value=7,
            max_value=MAX_LINE_LENGTH,
        ),
    ) -> None:
        """
        Changes guild's category pad length.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            group_id (str): String representation of Group id to set pad length in. Is SlashOption.
            length (int): Number of characters. Is SlashOption. Defaults to 26.
        """
        with Session(engine) as session:
            stmt = (
                select(CategoryGroup)
                .where(CategoryGroup.GuildId == interaction.guild_id)
                .where(CategoryGroup.GroupId == int(group_id))
            )
            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
            )

    @set.subcommand(
        description="Registers the channel for submission messages. Currently this information is deprecated."
    )
    async def submission_channel(
        self,
        interaction: nextcord.Interaction,
        channel: nextcord.abc.GuildChannel | None = 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

        with Session(engine) as session:
            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)

    @set.subcommand(description="Set username length for a Group of Categories.")
    async def username_length(
        self,
        interaction: nextcord.Interaction,
        group_id: str = nextcord.SlashOption(
            name="group", description="Group to change username length of.", required=True
        ),
        length: int = nextcord.SlashOption(
            description="Number of characters.", required=True, default=12, min_value=1, max_value=30
        ),
    ) -> None:
        """
        Changes guild's username length limit.

        Args:
            interaction (nextcord.Interaction): Interaction that invoked the command
            length (int): Number of characters. Is SlashOption. Defaults to 12.
        """
        with Session(engine) as session:
            stmt = (
                select(CategoryGroup)
                .where(CategoryGroup.GuildId == interaction.guild_id)
                .where(CategoryGroup.GroupId == int(group_id))
            )
            group = session.scalar(stmt)
            group.UsernameLength = length
            session.commit()
        await interaction.response.send_message(f"Username length set to {length}.", ephemeral=True)

    @set.subcommand(description="Registers the channel for verification messages.")
    async def verify_channel(
        self,
        interaction: nextcord.Interaction,
        channel: nextcord.abc.GuildChannel | None = 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]): Channel to register
                Is a SlashOption. Limited to text channels, Defaults to None.
        """
        if not channel:
            channel = interaction.channel
        channel_id = channel.id
        with Session(engine) as session:
            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)

    @group_output_channel.on_autocomplete("group_id")
    @pad_length.on_autocomplete("group_id")
    @username_length.on_autocomplete("group_id")
    async def group_autocomplete(self, interaction: nextcord.Interaction, group_id: str):
        """
        Sends results from autofill_groups back to group_output_channel for autocompletion of group_id.

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