# cogs/admin.py
import discord
from discord import app_commands
from discord.ext import commands
import os
import time
import aiohttp
import urllib.parse
import logging
import asyncio

from database.db import db
from utils.image_prep import prepare_database_image

logger = logging.getLogger(__name__)

class AdminCog(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

    # ==========================================================
    # 👤 ADD SINGLE CHARACTER
    # ==========================================================
    @app_commands.command(name="add_character", description="[ADMIN] Add a character or alternate variant")
    @app_commands.default_permissions(administrator=True)
    @app_commands.describe(
        name="Character Name (e.g. Raiden Shogun)",
        series="Anime/Game Series",
        rarity="Rarity (Common, Rare, Epic, Legendary, Mythic)",
        element="Element type",
        atk="Base Attack Stat",
        defense="Base Defense Stat",
        image="Upload the RAW character image",
        variant="Optional: Create an alt version (e.g. Summer)"
    )
    @app_commands.choices(rarity=[
        app_commands.Choice(name="Common", value="C"),
        app_commands.Choice(name="Rare", value="R"),
        app_commands.Choice(name="Epic", value="SR"),
        app_commands.Choice(name="Legendary", value="SSR"),
        app_commands.Choice(name="Mythic", value="UR")
    ])
    async def add_character(self, interaction: discord.Interaction, name: str, series: str, rarity: app_commands.Choice[str], element: str, atk: int, defense: int, image: discord.Attachment, variant: str = None):
        await interaction.response.defer(ephemeral=True)

        base_name = name.strip()
        final_name = f"{base_name} ({variant.strip()})" if variant else base_name

        async with db.pool.acquire() as conn:
            exists = await conn.fetchval("SELECT 1 FROM characters WHERE name ILIKE $1", final_name)
            if exists:
                if variant:
                    return await interaction.followup.send(f"❌ Error: The variant **{final_name}** already exists!", ephemeral=True)
                else:
                    count = await conn.fetchval("SELECT COUNT(*) FROM characters WHERE name ILIKE $1", f"{base_name} (Alt %)")
                    alt_num = count + 1 if count else 1
                    final_name = f"{base_name} (Alt {alt_num})"
                    while await conn.fetchval("SELECT 1 FROM characters WHERE name ILIKE $1", final_name):
                        alt_num += 1
                        final_name = f"{base_name} (Alt {alt_num})"

        supabase_url = os.getenv("SUPABASE_URL")
        supabase_key = os.getenv("SUPABASE_KEY")
        bucket_name = os.getenv("SUPABASE_BUCKET", "gacha-images")

        if not supabase_url or not supabase_key:
            return await interaction.followup.send("❌ Error: Supabase keys are missing from your .env file.", ephemeral=True)

        raw_image_bytes = await image.read()
        
        try:
            optimized_bytes = await asyncio.to_thread(prepare_database_image, raw_image_bytes)
            
            safe_filename = f"single_{int(time.time())}_{final_name.replace(' ', '_').lower()}.webp"
            upload_url = f"{supabase_url}/storage/v1/object/{bucket_name}/{safe_filename}"
            
            headers = {
                "Authorization": f"Bearer {supabase_key}",
                "apikey": supabase_key,
                "Content-Type": "image/webp"
            }

            async with aiohttp.ClientSession() as session:
                async with session.post(upload_url, headers=headers, data=optimized_bytes) as resp:
                    if resp.status not in [200, 201]:
                        error_json = await resp.json()
                        logger.error(f"Supabase upload failed: {error_json}")
                        return await interaction.followup.send("❌ Supabase API rejected the upload.", ephemeral=True)
                    
                    public_url = f"{supabase_url}/storage/v1/object/public/{bucket_name}/{safe_filename}"

            async with db.pool.acquire() as conn:
                await conn.execute(
                    """
                    INSERT INTO characters (name, series, rarity, element, atk, def, image_url) 
                    VALUES ($1, $2, $3, $4, $5, $6, $7)
                    """,
                    final_name, series, rarity.value, element, atk, defense, public_url
                )

            embed = discord.Embed(title="✅ Character Added Safely!", color=discord.Color.green())
            embed.add_field(name="Name", value=final_name, inline=True)
            embed.add_field(name="Series", value=series, inline=True)
            embed.add_field(name="Rarity", value=rarity.name, inline=True)
            embed.set_thumbnail(url=public_url)
            
            await interaction.followup.send(embed=embed)

        except Exception as e:
            logger.error(f"Add Character Error: {e}", exc_info=True)
            await interaction.followup.send("❌ An unexpected error occurred.", ephemeral=True)

    @app_commands.command(name="add_frame", description="[ADMIN] Upload a card frame directly to your bot's assets")
    @app_commands.default_permissions(administrator=True)
    @app_commands.choices(rarity=[
        app_commands.Choice(name="Common", value="C"),
        app_commands.Choice(name="Rare", value="R"),
        app_commands.Choice(name="Epic", value="SR"),
        app_commands.Choice(name="Legendary", value="SSR"),
        app_commands.Choice(name="Mythic", value="UR")
    ])
    async def add_frame(self, interaction: discord.Interaction, rarity: app_commands.Choice[str], frame_image: discord.Attachment):
        await interaction.response.defer(ephemeral=True)
        if not frame_image.filename.lower().endswith('.png'):
            return await interaction.followup.send("❌ Error: Frame images MUST be `.png` files.", ephemeral=True)

        base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
        frames_dir = os.path.join(base_dir, "assets", "frames")
        os.makedirs(frames_dir, exist_ok=True)
        save_path = os.path.join(frames_dir, f"{rarity.value}.png")
        
        try:
            await frame_image.save(save_path)
            await interaction.followup.send(f"✅ The **{rarity.name}** frame has been uploaded!")
        except Exception as e:
            await interaction.followup.send("❌ Failed to save the frame.", ephemeral=True)

async def setup(bot):
    await bot.add_cog(AdminCog(bot))