"""/drb — server-level DRB setup. Today: /drb link (server-26#213 item 1)."""
import discord
from discord import app_commands
from discord.ext import commands

from app.internal import guild_gate
from app.internal.c2_client import c2


class DRBCommands(commands.Cog):
    drb = app_commands.Group(
        name="drb",
        description="Set up DRB in this server.",
        guild_only=True,
        default_permissions=discord.Permissions(manage_guild=True),
    )

    def __init__(self, bot: commands.Bot):
        self.bot = bot

    @drb.command(name="link", description="Link this server to your DRB organization.")
    @app_commands.describe(code="The code from DRB → Settings → Organization → Discord servers.")
    async def link(self, interaction: discord.Interaction, code: str):
        await interaction.response.defer(ephemeral=True)
        # default_permissions is only the default — a server admin can grant
        # the command to anyone under Integrations. Linking decides which
        # organization's radio this whole server gets, so hold the line here.
        perms = getattr(interaction.user, "guild_permissions", None)
        if not perms or not perms.manage_guild:
            await interaction.followup.send("Only members with **Manage Server** can link this server.",
                                            ephemeral=True)
            return
        ok, body = await c2.redeem_guild_link(
            interaction.guild_id, code, str(interaction.user.id),
            interaction.guild.name if interaction.guild else None,
        )
        guild_gate.forget(interaction.guild_id)
        radio = self.bot.get_cog("RadioCommands")
        if radio is not None:
            radio._overview.pop(interaction.guild_id, None)
        if not ok:
            await interaction.followup.send(body.get("detail") or "DRB could not link this server.",
                                            ephemeral=True)
            return
        org = body.get("org_name") or "your DRB organization"
        if body.get("already_linked"):
            text = f"This server was already linked to **{org}**. Nothing changed."
        else:
            text = (f"This server is now linked to **{org}**.\n"
                    "`/join`, `/leave` and `/status` now act for that organization only.")
        await interaction.followup.send(text, ephemeral=True)


async def setup(bot: commands.Bot):
    await bot.add_cog(DRBCommands(bot))