# src/cogs/packs.py
import random
import discord
from discord.ext import commands
from typing import Optional, Dict, List, Tuple

from .. import db

# ---- Tunables (override via constants.py if you want) ----
try:
    from ..utils.constants import PACK_MIN_BET, PACK_SIZE, PACK_RARITY_WEIGHTS
except Exception:
    PACK_MIN_BET = 50
    PACK_SIZE = 5
    # weights per rarity (sum doesn't need to be 1; we normalize)
    PACK_RARITY_WEIGHTS = {
        "Common": 600,
        "Uncommon": 250,
        "Rare": 100,
        "Epic": 40,
        "Legendary": 9,
        "Mythic": 1,
    }

# -----------------------------------------------------------------------------
# Catalog: id, emoji, display name, rarity, multiplier (× bet)
# Kept your original 25 items & IDs; expanded to 100 total.
# -----------------------------------------------------------------------------
CATALOG: List[Dict] = [
    # ---------------------- Common (40) ----------------------
    {"id":"cherry","emoji":"🍒","name":"Cherries","rarity":"Common","mult":0.10},
    {"id":"coin","emoji":"🪙","name":"Coin","rarity":"Common","mult":0.12},
    {"id":"mug","emoji":"☕","name":"Mug","rarity":"Common","mult":0.15},
    {"id":"leaf","emoji":"🌿","name":"Leaf","rarity":"Common","mult":0.18},
    {"id":"sock","emoji":"🧦","name":"Sock","rarity":"Common","mult":0.20},
    {"id":"teddy","emoji":"🧸","name":"Teddy","rarity":"Common","mult":0.22},
    {"id":"ice","emoji":"🧊","name":"Ice","rarity":"Common","mult":0.24},
    {"id":"clover","emoji":"🍀","name":"Clover","rarity":"Common","mult":0.25},

    {"id":"apple","emoji":"🍎","name":"Apple","rarity":"Common","mult":0.12},
    {"id":"banana","emoji":"🍌","name":"Banana","rarity":"Common","mult":0.14},
    {"id":"pear","emoji":"🍐","name":"Pear","rarity":"Common","mult":0.13},
    {"id":"peach","emoji":"🍑","name":"Peach","rarity":"Common","mult":0.16},
    {"id":"strawberry","emoji":"🍓","name":"Strawberry","rarity":"Common","mult":0.18},
    {"id":"grapes","emoji":"🍇","name":"Grapes","rarity":"Common","mult":0.20},
    {"id":"carrot","emoji":"🥕","name":"Carrot","rarity":"Common","mult":0.12},
    {"id":"corn","emoji":"🌽","name":"Corn","rarity":"Common","mult":0.15},
    {"id":"bread","emoji":"🍞","name":"Bread","rarity":"Common","mult":0.14},
    {"id":"cheese","emoji":"🧀","name":"Cheese","rarity":"Common","mult":0.18},
    {"id":"egg","emoji":"🥚","name":"Egg","rarity":"Common","mult":0.16},
    {"id":"milk","emoji":"🥛","name":"Milk","rarity":"Common","mult":0.12},
    {"id":"mushroom","emoji":"🍄","name":"Mushroom","rarity":"Common","mult":0.20},
    {"id":"seedling","emoji":"🌱","name":"Seedling","rarity":"Common","mult":0.16},
    {"id":"flower","emoji":"🌼","name":"Flower","rarity":"Common","mult":0.16},
    {"id":"maple","emoji":"🍁","name":"Maple Leaf","rarity":"Common","mult":0.18},
    {"id":"sun","emoji":"☀️","name":"Sun","rarity":"Common","mult":0.24},
    {"id":"moon","emoji":"🌙","name":"Moon","rarity":"Common","mult":0.22},
    {"id":"cloud","emoji":"☁️","name":"Cloud","rarity":"Common","mult":0.18},
    {"id":"snowflake","emoji":"❄️","name":"Snowflake","rarity":"Common","mult":0.20},
    {"id":"umbrella","emoji":"☂️","name":"Umbrella","rarity":"Common","mult":0.18},
    {"id":"balloon","emoji":"🎈","name":"Balloon","rarity":"Common","mult":0.22},
    {"id":"pencil","emoji":"✏️","name":"Pencil","rarity":"Common","mult":0.14},
    {"id":"book","emoji":"📘","name":"Book","rarity":"Common","mult":0.16},
    {"id":"paperclip","emoji":"🖇️","name":"Paperclip","rarity":"Common","mult":0.14},
    {"id":"scissors","emoji":"✂️","name":"Scissors","rarity":"Common","mult":0.16},
    {"id":"bulb","emoji":"💡","name":"Light Bulb","rarity":"Common","mult":0.24},
    {"id":"battery","emoji":"🔋","name":"Battery","rarity":"Common","mult":0.22},
    {"id":"wrench","emoji":"🔧","name":"Wrench","rarity":"Common","mult":0.20},
    {"id":"hammer","emoji":"🔨","name":"Hammer","rarity":"Common","mult":0.20},
    {"id":"camera","emoji":"📷","name":"Camera","rarity":"Common","mult":0.24},
    {"id":"gamepad","emoji":"🎮","name":"Gamepad","rarity":"Common","mult":0.24},

    # -------------------- Uncommon (25) ---------------------
    {"id":"donut","emoji":"🍩","name":"Donut","rarity":"Uncommon","mult":0.35},
    {"id":"pizza","emoji":"🍕","name":"Pizza","rarity":"Uncommon","mult":0.40},
    {"id":"soccer","emoji":"⚽","name":"Soccer Ball","rarity":"Uncommon","mult":0.45},
    {"id":"headset","emoji":"🎧","name":"Headset","rarity":"Uncommon","mult":0.50},
    {"id":"magnet","emoji":"🧲","name":"Magnet","rarity":"Uncommon","mult":0.55},
    {"id":"cat","emoji":"🐱","name":"Cat","rarity":"Uncommon","mult":0.60},

    {"id":"basketball","emoji":"🏀","name":"Basketball","rarity":"Uncommon","mult":0.45},
    {"id":"baseball","emoji":"⚾","name":"Baseball","rarity":"Uncommon","mult":0.42},
    {"id":"guitar","emoji":"🎸","name":"Guitar","rarity":"Uncommon","mult":0.55},
    {"id":"violin","emoji":"🎻","name":"Violin","rarity":"Uncommon","mult":0.58},
    {"id":"joystick","emoji":"🕹️","name":"Joystick","rarity":"Uncommon","mult":0.50},
    {"id":"keyboard","emoji":"⌨️","name":"Keyboard","rarity":"Uncommon","mult":0.48},
    {"id":"laptop","emoji":"💻","name":"Laptop","rarity":"Uncommon","mult":0.60},
    {"id":"robot","emoji":"🤖","name":"Robot","rarity":"Uncommon","mult":0.62},
    {"id":"dog","emoji":"🐶","name":"Dog","rarity":"Uncommon","mult":0.55},
    {"id":"fox","emoji":"🦊","name":"Fox","rarity":"Uncommon","mult":0.58},
    {"id":"penguin","emoji":"🐧","name":"Penguin","rarity":"Uncommon","mult":0.60},
    {"id":"koala","emoji":"🐨","name":"Koala","rarity":"Uncommon","mult":0.60},
    {"id":"panda","emoji":"🐼","name":"Panda","rarity":"Uncommon","mult":0.60},
    {"id":"owl","emoji":"🦉","name":"Owl","rarity":"Uncommon","mult":0.65},
    {"id":"butterfly","emoji":"🦋","name":"Butterfly","rarity":"Uncommon","mult":0.65},
    {"id":"car","emoji":"🚗","name":"Car","rarity":"Uncommon","mult":0.55},
    {"id":"train","emoji":"🚆","name":"Train","rarity":"Uncommon","mult":0.55},
    {"id":"sailboat","emoji":"⛵","name":"Sailboat","rarity":"Uncommon","mult":0.58},
    {"id":"airplane","emoji":"✈️","name":"Airplane","rarity":"Uncommon","mult":0.62},

    # ---------------------- Rare (18) -----------------------
    {"id":"melon","emoji":"🍉","name":"Watermelon","rarity":"Rare","mult":0.85},
    {"id":"tiger","emoji":"🐯","name":"Tiger","rarity":"Rare","mult":1.00},
    {"id":"ufo","emoji":"🛸","name":"UFO","rarity":"Rare","mult":1.10},
    {"id":"unicorn","emoji":"🦄","name":"Unicorn","rarity":"Rare","mult":1.20},

    {"id":"elephant","emoji":"🐘","name":"Elephant","rarity":"Rare","mult":0.95},
    {"id":"lion","emoji":"🦁","name":"Lion","rarity":"Rare","mult":1.05},
    {"id":"wolf","emoji":"🐺","name":"Wolf","rarity":"Rare","mult":1.05},
    {"id":"dolphin","emoji":"🐬","name":"Dolphin","rarity":"Rare","mult":0.90},
    {"id":"whale","emoji":"🐳","name":"Whale","rarity":"Rare","mult":0.90},
    {"id":"alien","emoji":"👽","name":"Alien","rarity":"Rare","mult":1.10},
    {"id":"ghost","emoji":"👻","name":"Ghost","rarity":"Rare","mult":1.00},
    {"id":"crystalball","emoji":"🔮","name":"Crystal Ball","rarity":"Rare","mult":1.10},
    {"id":"satellite","emoji":"🛰️","name":"Satellite","rarity":"Rare","mult":1.15},
    {"id":"comet","emoji":"☄️","name":"Comet","rarity":"Rare","mult":1.20},
    {"id":"ninja","emoji":"🥷","name":"Ninja","rarity":"Rare","mult":1.10},
    {"id":"mountain","emoji":"⛰️","name":"Mountain","rarity":"Rare","mult":0.95},
    {"id":"volcano","emoji":"🌋","name":"Volcano","rarity":"Rare","mult":1.00},
    {"id":"ring_rare","emoji":"💍","name":"Ring","rarity":"Rare","mult":1.25},

    # ---------------------- Epic (10) -----------------------
    {"id":"dragon","emoji":"🐉","name":"Dragon","rarity":"Epic","mult":2.0},
    {"id":"lab","emoji":"🧪","name":"Lab Flask","rarity":"Epic","mult":2.5},
    {"id":"rocket","emoji":"🚀","name":"Rocket","rarity":"Epic","mult":3.0},

    {"id":"wizard","emoji":"🧙","name":"Wizard","rarity":"Epic","mult":2.2},
    {"id":"wand","emoji":"🪄","name":"Magic Wand","rarity":"Epic","mult":2.6},
    {"id":"dragonface","emoji":"🐲","name":"Dragon Face","rarity":"Epic","mult":2.8},
    {"id":"castle","emoji":"🏰","name":"Castle","rarity":"Epic","mult":2.4},
    {"id":"shield","emoji":"🛡️","name":"Shield","rarity":"Epic","mult":2.3},
    {"id":"swords","emoji":"⚔️","name":"Crossed Swords","rarity":"Epic","mult":2.7},
    {"id":"trophy_epic","emoji":"🏆","name":"Trophy","rarity":"Epic","mult":3.2},

    # ------------------- Legendary (5) ----------------------
    {"id":"crown","emoji":"👑","name":"Crown","rarity":"Legendary","mult":6.0},
    {"id":"eagle","emoji":"🦅","name":"Eagle","rarity":"Legendary","mult":7.5},

    {"id":"medal","emoji":"🥇","name":"Gold Medal","rarity":"Legendary","mult":9.0},
    {"id":"moneybag","emoji":"💰","name":"Money Bag","rarity":"Legendary","mult":8.5},
    {"id":"ring_legend","emoji":"💍","name":"Royal Ring","rarity":"Legendary","mult":10.0},

    # --------------------- Mythic (2) -----------------------
    {"id":"dino","emoji":"🦖","name":"Dino","rarity":"Mythic","mult":25.0},
    {"id":"diamond","emoji":"💎","name":"Diamond","rarity":"Mythic","mult":50.0},
]

# Build rarity index
RARITY_TO_ITEMS: Dict[str, List[Dict]] = {}
for it in CATALOG:
    RARITY_TO_ITEMS.setdefault(it["rarity"], []).append(it)

def _norm_weights(weights: Dict[str, float]) -> Dict[str, float]:
    s = float(sum(weights.values()))
    return {k: (v / s if s > 0 else 0.0) for k, v in weights.items()}

NORM_RARITY = _norm_weights(PACK_RARITY_WEIGHTS)

def _weighted_choice(items: List[Tuple[float, Dict]]) -> Dict:
    """items: list of (weight, item) where weight >= 0"""
    total = sum(w for w, _ in items)
    r = random.random() * total
    upto = 0.0
    for w, it in items:
        upto += w
        if r <= upto:
            return it
    return items[-1][1]

def pick_one() -> Dict:
    # pick rarity
    rar_roll = _weighted_choice([(p, {"rarity": r}) for r, p in NORM_RARITY.items()])["rarity"]
    pool = RARITY_TO_ITEMS.get(rar_roll, CATALOG)
    # equal within rarity
    return random.choice(pool)

def money(n: int) -> str:
    return f"${n:,}"

# ---------- Pagination helpers ----------
RARITY_RANK = {"Mythic": 0, "Legendary": 1, "Epic": 2, "Rare": 3, "Uncommon": 4, "Common": 5}
SORTED_CATALOG = sorted(
    CATALOG,
    key=lambda it: (RARITY_RANK.get(it["rarity"], 99), -float(it["mult"]), it["name"])
)
# Attach rank (1 = rarest)
for i, it in enumerate(SORTED_CATALOG, 1):
    it["_rank"] = i

PAGE_SIZE = 20  # 100 items -> 5 pages

def _collection_page_lines(user_id: int, page: int) -> Tuple[str, int, int, int]:
    """
    Returns (text, start_idx, end_idx, total_pages) for the given page (0-based).
    """
    coll = db.get_packs_collection(user_id)
    total = len(SORTED_CATALOG)
    pages = max(1, (total + PAGE_SIZE - 1) // PAGE_SIZE)
    page = max(0, min(page, pages - 1))
    start = page * PAGE_SIZE
    end = min(total, start + PAGE_SIZE)

    lines: List[str] = []
    for it in SORTED_CATALOG[start:end]:
        owned = coll.get(it["id"], 0) > 0
        idx = it["_rank"]
        if owned:
            lines.append(f"**#{idx:02d}** {it['emoji']} **{it['name']}** · *{it['rarity']}*")
        else:
            lines.append(f"**#{idx:02d}** ?")
    text = "\n".join(lines)
    return text, start, end, pages

def _collection_embed(user_id: int, page: int) -> discord.Embed:
    coll = db.get_packs_collection(user_id)
    have = sum(1 for it in SORTED_CATALOG if coll.get(it["id"], 0) > 0)
    total = len(SORTED_CATALOG)
    text, start, end, pages = _collection_page_lines(user_id, page)
    e = discord.Embed(
        title="🗂️ Packs Collection",
        description=f"**Progress:** {have}/{total} collected\n"
                    f"Rarest is **#01**, Common end is **#{total:02d}**.\n\n{text}",
        color=discord.Color.dark_gold()
    )
    e.set_footer(text=f"Page {page+1}/{pages}  •  Showing #{start+1:02d}–#{end:02d}")
    return e

# ---------- UI: Set Bet modal ----------
class SetBetModal(discord.ui.Modal, title="Set Packs Bet"):
    def __init__(self, view: "PacksView"):
        super().__init__()
        self.view = view
        self.amount = discord.ui.TextInput(
            label=f"Amount (min {PACK_MIN_BET})",
            placeholder=str(self.view.bet),
            required=True, min_length=1, max_length=10,
        )
        self.add_item(self.amount)

    async def on_submit(self, itx: discord.Interaction):
        if itx.user.id != self.view.user_id:
            return await itx.response.send_message("This isn’t your Packs panel.", ephemeral=True)
        if self.view.busy:
            return await itx.response.send_message("Please wait a moment.", ephemeral=True)
        raw = str(self.amount.value)
        try:
            amt = int("".join(ch for ch in raw if ch.isdigit()))
        except Exception:
            return await itx.response.send_message("Enter a valid number.", ephemeral=True)
        self.view.bet = max(PACK_MIN_BET, amt)
        await itx.response.defer(ephemeral=True)
        if self.view.message:
            await self.view.message.edit(embed=self.view.render(), view=self.view)

# ---------- UI: Collection View ----------
class PacksCollectionView(discord.ui.View):
    def __init__(self, user_id: int, *, start_page: int = 0, timeout: int = 180):
        super().__init__(timeout=timeout)
        self.user_id = user_id
        self.page = start_page
        self.pages = max(1, (len(SORTED_CATALOG) + PAGE_SIZE - 1) // PAGE_SIZE)
        self.message: Optional[discord.Message] = None

    async def on_timeout(self):
        for c in self.children:
            c.disabled = True
        try:
            if self.message:
                await self.message.edit(view=self)
        except:
            pass

    async def interaction_check(self, interaction: discord.Interaction) -> bool:
        if interaction.user.id != self.user_id:
            await interaction.response.send_message("This collection belongs to someone else.", ephemeral=True)
            return False
        return True

    def _sync(self):
        # enable/disable nav buttons based on current page
        for c in self.children:
            if isinstance(c, discord.ui.Button):
                if c.custom_id == "first": c.disabled = (self.page <= 0)
                if c.custom_id == "prev":  c.disabled = (self.page <= 0)
                if c.custom_id == "next":  c.disabled = (self.page >= self.pages - 1)
                if c.custom_id == "last":  c.disabled = (self.page >= self.pages - 1)

    def embed(self) -> discord.Embed:
        self._sync()
        return _collection_embed(self.user_id, self.page)

    @discord.ui.button(label="⏮️", style=discord.ButtonStyle.secondary, custom_id="first")
    async def first(self, itx: discord.Interaction, _):
        self.page = 0
        await itx.response.edit_message(embed=self.embed(), view=self)

    @discord.ui.button(label="◀️", style=discord.ButtonStyle.secondary, custom_id="prev")
    async def prev(self, itx: discord.Interaction, _):
        if self.page > 0:
            self.page -= 1
        await itx.response.edit_message(embed=self.embed(), view=self)

    @discord.ui.button(label="▶️", style=discord.ButtonStyle.secondary, custom_id="next")
    async def next(self, itx: discord.Interaction, _):
        if self.page < self.pages - 1:
            self.page += 1
        await itx.response.edit_message(embed=self.embed(), view=self)

    @discord.ui.button(label="⏭️", style=discord.ButtonStyle.secondary, custom_id="last")
    async def last(self, itx: discord.Interaction, _):
        self.page = self.pages - 1
        await itx.response.edit_message(embed=self.embed(), view=self)

    @discord.ui.button(label="Close", style=discord.ButtonStyle.danger)
    async def close(self, itx: discord.Interaction, _):
        try:
            await itx.message.delete()
        except:
            try:
                for c in self.children: c.disabled = True
                await itx.response.edit_message(view=self)
            except:
                pass

# ---------- Packs game UI ----------
class PacksView(discord.ui.View):
    """
    Row 0: Set Bet · ×2 · ½ · Open Pack
    Row 1: Open Again · Collection
    """
    def __init__(self, user_id: int, initial_bet: int = 100, *, timeout: int = 180):
        super().__init__(timeout=timeout)
        self.user_id = user_id
        self.bet = max(PACK_MIN_BET, initial_bet)
        self.last_pack: Optional[List[Dict]] = None
        self.last_return: int = 0
        self.last_net: int = 0
        self.busy = False
        self.message: Optional[discord.Message] = None

    async def on_timeout(self):
        for c in self.children: c.disabled = True
        try:
            if self.message: await self.message.edit(view=self)
        except: pass

    # ---- render
    def render(self) -> discord.Embed:
        color = discord.Color.blurple()
        if self.last_pack is not None:
            color = discord.Color.green() if self.last_net > 0 else (discord.Color.red() if self.last_net < 0 else discord.Color.orange())
        e = discord.Embed(title="📦 Packs", color=color)

        cash, _ = db.get_wallet(self.user_id)
        desc = [f"**Bet:** {money(self.bet)}   •   **Balance:** {money(cash)}"]
        if self.last_pack is None:
            desc += ["Open a pack of 5 items. Each item pays its multiplier × your bet. Collect them all!"]
        e.description = "\n".join(desc)

        if self.last_pack is not None:
            lines = []
            for it in self.last_pack:
                tag = "NEW" if it.get("_new") else "DUP"
                lines.append(f"{it['emoji']} **{it['name']}** · *{it['rarity']}* · ×{it['mult']:.2f}  `{tag}`")
            e.add_field(name="Last Pack", value="\n".join(lines), inline=False)
            e.add_field(
                name="Result",
                value=f"Return: **{money(self.last_return)}**  •  Net: **{'+' if self.last_net>0 else ''}{money(self.last_net)}**",
                inline=False
            )
        return e

    # ---- actions
    async def _open_pack(self, itx: discord.Interaction):
        if self.busy: return
        self.busy = True

        cash, _ = db.get_wallet(self.user_id)
        if self.bet > cash:
            self.busy = False
            return await itx.response.send_message("Not enough cash for that bet.", ephemeral=True)

        # debit
        db.add_cash(self.user_id, -self.bet)

        # current collection to mark NEW/DUP
        coll = db.get_packs_collection(self.user_id)  # dict card_id -> qty

        pulled: List[Dict] = []
        total_mult = 0.0
        for _ in range(PACK_SIZE):
            it = pick_one().copy()
            it["_new"] = (coll.get(it["id"], 0) == 0)
            pulled.append(it)
            total_mult += it["mult"]
            # persist collection increment
            db.add_pack_card(self.user_id, it["id"], 1)
            coll[it["id"]] = coll.get(it["id"], 0) + 1

        returned = int(self.bet * total_mult)
        if returned > 0:
            db.add_cash(self.user_id, returned)

        db.record_packs_open(self.user_id, bet=self.bet, return_amount=returned, won=(returned > self.bet))

        self.last_pack = pulled
        self.last_return = returned
        self.last_net = returned - self.bet

        await itx.response.edit_message(embed=self.render(), view=self)
        self.busy = False

    # ----- Buttons
    @discord.ui.button(label="Set Bet", style=discord.ButtonStyle.secondary, row=0)
    async def set_bet(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id: return await itx.response.send_message("Not your panel.", ephemeral=True)
        await itx.response.send_modal(SetBetModal(self))

    @discord.ui.button(label="×2", style=discord.ButtonStyle.secondary, row=0)
    async def x2(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id: return await itx.response.send_message("Not your panel.", ephemeral=True)
        self.bet = max(PACK_MIN_BET, self.bet * 2)
        await itx.response.edit_message(embed=self.render(), view=self)

    @discord.ui.button(label="½", style=discord.ButtonStyle.secondary, row=0)
    async def half(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id: return await itx.response.send_message("Not your panel.", ephemeral=True)
        self.bet = max(PACK_MIN_BET, self.bet // 2)
        await itx.response.edit_message(embed=self.render(), view=self)

    @discord.ui.button(label="Open Pack", style=discord.ButtonStyle.success, emoji="🎁", row=0)
    async def open_pack(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id: return await itx.response.send_message("Not your panel.", ephemeral=True)
        await self._open_pack(itx)

    @discord.ui.button(label="Open Again", style=discord.ButtonStyle.primary, emoji="🔁", row=1)
    async def open_again(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id: return await itx.response.send_message("Not your panel.", ephemeral=True)
        await self._open_pack(itx)

    @discord.ui.button(label="Collection", style=discord.ButtonStyle.secondary, emoji="🗂️", row=1)
    async def collection(self, itx: discord.Interaction, _):
        if itx.user.id != self.user_id:
            return await itx.response.send_message("This isn’t your Packs panel.", ephemeral=True)
        view = PacksCollectionView(self.user_id, start_page=0, timeout=180)
        await itx.response.send_message(embed=view.embed(), view=view, ephemeral=True)

# ---------- Cog ----------
class PacksCog(commands.Cog):
    def __init__(self, bot): self.bot = bot

    @commands.command(name="packs")
    async def packs(self, ctx: commands.Context, bet: int = None):
        uid = ctx.author.id
        view = PacksView(uid, initial_bet=bet or PACK_MIN_BET, timeout=180)
        msg = await ctx.send(embed=view.render(), view=view)
        view.message = msg

    @commands.command(name="collection", aliases=["packdex","packsdex"])
    async def collection(self, ctx: commands.Context):
        uid = ctx.author.id
        view = PacksCollectionView(uid, start_page=0, timeout=180)
        msg = await ctx.send(embed=view.embed(), view=view)
        view.message = msg

async def setup(bot):
    # make sure DB tables exist for packs
    db.ensure_packs_tables()
    await bot.add_cog(PacksCog(bot))