"""Entry point for the Discord bot.

Usage:
    ./start_server.sh
"""

import asyncio
import os
import sys
import logging
import random
import discord
from discord.ext import commands
from discord.app_commands import Command as AppCommand, CommandTree

# from handlers.gif_emotes import setup as setup_gif_emotes
# from handlers.reactions import setup as setup_reactions
from handlers.voice import setup as setup_voice
from handlers.voice_gen import setup as setup_voice_gen
from handlers.love_emotes import setup as setup_love_emotes
from handlers.utils import setup as setup_utils
from handlers.memes import process_meme
from commands.ping import ping
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

# Configure logging
logging.basicConfig(
    level=logging.DEBUG if os.environ.get("APP_DEBUG") == "1" else logging.INFO,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
    handlers=[logging.StreamHandler(sys.stdout),
              logging.FileHandler("bot.log")]
)


# ─── Bot Setup ───────────────────────────────────────────────────────────────

intents = discord.Intents.default()
intents.message_content = True
intents.members = True
intents.messages = True
intents.voice_states = True

bot = commands.Bot(
    command_prefix="!",
    intents=intents,
)

tree: CommandTree = bot.tree

# ─── Slash Commands ──────────────────────────────────────────────────────────

tree.add_command(AppCommand(name="ping", callback=ping, description="Check bot latency."))

# ─── Event Handlers ──────────────────────────────────────────────────────────


@bot.event
async def on_ready() -> None:
    """Entry point after successful login."""
    assert bot.user is not None
    print(f"Logged in as {bot.user} (ID: {bot.user.id})")
    print(f"Bot is running with {len(bot.guilds)} guilds")

    # Register handlers
    await setup_voice(bot)
    await setup_love_emotes(bot)
    await setup_utils(bot)
    await setup_voice_gen(bot)

    # Sync slash commands
    await tree.sync()
    print("Slash commands synced.")

    print("All handlers registered.")


@bot.event
async def on_command_error(ctx: commands.Context, error: commands.CommandError) -> None:
    """Global error handler for all commands."""
    logger = logging.getLogger(__name__)
    logger.debug(f"Command error for {ctx.author.name} ({ctx.author.id}): {error}")
    if isinstance(error, commands.CommandNotFound):
        await ctx.send("Command not found. Type `!list-commands` for a list of commands.")
    elif isinstance(error, commands.CheckFailure):
        await ctx.send("You do not have permission to use this command.")
    elif isinstance(error, commands.MissingPermissions):
        await ctx.send("You don't have permission to use this command.")
    elif isinstance(error, commands.MissingRequiredArgument):
        await ctx.send(f"Missing argument: {error.param.name}.")
    elif isinstance(error, commands.BadArgument):
        await ctx.send(f"Bad argument: {error.argument}.")
    elif isinstance(error, commands.CommandOnCooldown):
        remaining = int(error.retry_after)
        await ctx.send(
            f"This command is on cooldown. Try again in {remaining} seconds."
        )
    else:
        await ctx.send(f"An error occurred: {error.__traceback__.__str__()}")


@bot.event
async def on_message(message: discord.Message) -> None:
    """Handle text messages sent in channels (prefix commands)."""
    # Ignore bot's own messages
    if message.author == bot.user:
        return
    logging.debug(f"Got message: {message.content} with @mentions: {message.mentions}")
    # Ignore messages in DMs
    if message.guild is None:
        return
    msg = message.content
    if bot.user in message.mentions:
        await message.channel.send("Let the rich eat cake!")
    if msg.startswith("!"):
        await bot.process_commands(message)
    # The meme train
    if random.randint(1, 100) > 25:
        await process_meme(message)

# ─── Entry Point ─────────────────────────────────────────────────────────────


def main() -> None:
    """Run the bot."""
    token = os.getenv("DISCORD_TOKEN")
    if not token:
        print("Error: DISCORD_TOKEN environment variable is not set.")
        print("Create a .env file with your Discord bot token.")
        sys.exit(1)

    asyncio.run(bot.start(token))


if __name__ == "__main__":
    main()