"""Discord slash commands for MoltMic voice bot."""

from typing import Optional

import discord
from discord import app_commands

from utils.logging import get_logger

try:
    from discord.ext import voice_recv
    HAS_VOICE_RECV = True
except ImportError:
    voice_recv = None
    HAS_VOICE_RECV = False

logger = get_logger(__name__)


class MoltMicCommands(app_commands.Group):
    """Slash commands for MoltMic voice bot."""

    def __init__(self, bot):
        super().__init__(name="moltmic", description="MoltMic voice commands")
        self.bot = bot

    @app_commands.command(name="join", description="Join your voice channel and start listening")
    @app_commands.describe(channel="Voice channel to join (defaults to your current channel)")
    async def join(self, interaction: discord.Interaction, channel: Optional[discord.VoiceChannel] = None):
        await interaction.response.defer(thinking=True)

        try:
            target = channel or (interaction.user.voice and interaction.user.voice.channel)
            if not target:
                await interaction.followup.send("❌ You're not in a voice channel.", ephemeral=True)
                return

            # Already in this channel?
            if interaction.guild.voice_client and interaction.guild.voice_client.channel.id == target.id:
                await interaction.followup.send(f"Already in {target.mention}", ephemeral=True)
                return

            # Move or connect
            if interaction.guild.voice_client:
                await interaction.guild.voice_client.move_to(target)
                voice_client = interaction.guild.voice_client
            else:
                connect_cls = voice_recv.VoiceRecvClient if HAS_VOICE_RECV else discord.VoiceClient
                voice_client = await target.connect(cls=connect_cls, self_deaf=False, timeout=60.0)

            await self.bot.on_voice_join(interaction.guild, target, voice_client)
            await interaction.followup.send(f"🎙️ Joined {target.mention} and listening...")

        except discord.errors.ClientException as e:
            logger.error(f"Failed to join: {e}")
            await interaction.followup.send(f"❌ Failed to join: {e}", ephemeral=True)
        except Exception as e:
            logger.exception(f"Join error: {e}")
            await interaction.followup.send("❌ Unexpected error", ephemeral=True)

    @app_commands.command(name="leave", description="Leave the voice channel")
    async def leave(self, interaction: discord.Interaction):
        await interaction.response.defer(thinking=True)

        try:
            if not interaction.guild.voice_client:
                await interaction.followup.send("❌ Not in a voice channel.", ephemeral=True)
                return

            await self.bot.on_voice_leave(interaction.guild)
            await interaction.followup.send("👋 Left voice channel.")

        except Exception as e:
            logger.exception(f"Leave error: {e}")
            await interaction.followup.send("❌ Error leaving.", ephemeral=True)

    @app_commands.command(name="status", description="Show bot status")
    async def status(self, interaction: discord.Interaction):
        await interaction.response.defer(thinking=True)

        try:
            session = self.bot.session_manager.get_session(interaction.guild.id)
            if not session:
                await interaction.followup.send("❌ Not in a voice channel.", ephemeral=True)
                return

            embed = discord.Embed(title="🎙️ MoltMic Status", color=discord.Color.green())
            embed.add_field(name="Channel", value=f"<#{session.channel_id}>", inline=True)
            embed.add_field(name="Duration", value=f"{session.duration:.0f}s", inline=True)
            embed.add_field(name="Users", value=str(session.get_user_count()), inline=True)
            await interaction.followup.send(embed=embed)

        except Exception as e:
            logger.exception(f"Status error: {e}")
            await interaction.followup.send("❌ Error.", ephemeral=True)


async def setup_commands(bot):
    """Register slash commands."""
    cmds = MoltMicCommands(bot)
    bot.tree.add_command(cmds)
    logger.info("Slash commands registered (moltmic: join, leave, status)")
    return cmds