import logging
from aiogram import Router, F, Bot
from aiogram.types import Message, CallbackQuery
from aiogram.filters import Command
from aiogram.fsm.context import FSMContext
from aiogram.fsm.state import State, StatesGroup

from config import ADMIN_IDS
from database.db import (
    get_active_products, get_stock_summary, add_gift_code,
    count_users, get_total_stats, get_pending_delivery_orders,
    get_available_code, mark_code_used, complete_order,
    update_product_price, get_all_user_ids, count_available_codes
)
from keyboards.admin_kb import (
    admin_panel_kb, admin_select_product_kb,
    admin_back_kb, admin_pending_order_kb, cancel_admin_action_kb
)

logger = logging.getLogger(__name__)
router = Router()


# ─────────────────── FSM STATES ───────────────────

class AdminStates(StatesGroup):
    waiting_product_for_code = State()   # Qaysi mahsulotga kod qo'shish
    waiting_gift_link = State()          # Kodni kiritish
    waiting_broadcast_message = State()  # Broadcast xabari
    waiting_product_for_price = State()  # Narx o'zgartirish uchun mahsulot
    waiting_new_price = State()          # Yangi narxni kiritish


# ─────────────────── ADMIN CHECK DECORATOR ───────────────────

def admin_only(func):
    """Faqat adminlar uchun filtr."""
    async def wrapper(event, **kwargs):
        user_id = event.from_user.id if hasattr(event, 'from_user') else None
        if user_id not in ADMIN_IDS:
            if isinstance(event, Message):
                await event.answer("🚫 Ruxsat yo'q!")
            elif isinstance(event, CallbackQuery):
                await event.answer("🚫 Faqat adminlar!", show_alert=True)
            return
        return await func(event, **kwargs)
    return wrapper


# ─────────────────── ADMIN PANEL ───────────────────

@router.message(Command("admin"))
async def cmd_admin(message: Message):
    """Admin paneli — faqat adminlar uchun."""
    if message.from_user.id not in ADMIN_IDS:
        await message.answer("🚫 Bu buyruq faqat adminlar uchun!")
        return
    await message.answer(
        "🛠️ <b>Admin Panel</b>\n\nXohlagan amalni tanlang:",
        reply_markup=admin_panel_kb(),
        parse_mode="HTML"
    )


@router.callback_query(F.data == "admin_panel")
async def show_admin_panel(callback: CallbackQuery, state: FSMContext):
    """Admin panelga qaytish."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return
    await state.clear()
    await callback.message.edit_text(
        "🛠️ <b>Admin Panel</b>\n\nXohlagan amalni tanlang:",
        reply_markup=admin_panel_kb(),
        parse_mode="HTML"
    )
    await callback.answer()


# ─────────────────── ZAXIRA HOLATI ───────────────────

@router.callback_query(F.data == "admin_stock")
async def show_stock(callback: CallbackQuery):
    """Zaxira holati."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    stock = await get_stock_summary()
    lines = ["📦 <b>Zaxira Holati:</b>\n"]
    for item in stock:
        status = "✅" if item["available"] > 0 else "❌"
        lines.append(
            f"{status} {item['emoji']} {item['name']}\n"
            f"   ⭐ Narx: {item['stars_price']} Stars\n"
            f"   📌 Mavjud: <b>{item['available']}</b> ta | "
            f"Ishlatilgan: {item['used']} ta | Jami: {item['total']} ta\n"
        )

    await callback.message.edit_text(
        "\n".join(lines),
        reply_markup=admin_back_kb(),
        parse_mode="HTML"
    )
    await callback.answer()


# ─────────────────── SOVGʻA LINK QO'SHISH ───────────────────

@router.callback_query(F.data == "admin_add_code")
async def admin_add_code_start(callback: CallbackQuery, state: FSMContext):
    """Sovg'a link qo'shish — mahsulot tanlash."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    products = await get_active_products()
    await callback.message.edit_text(
        "➕ <b>Sovg'a Link Qo'shish</b>\n\nQaysi mahsulot uchun link qo'shmoqchisiz?",
        reply_markup=admin_select_product_kb(products, action="addcode"),
        parse_mode="HTML"
    )
    await state.set_state(AdminStates.waiting_product_for_code)
    await callback.answer()


@router.callback_query(F.data.startswith("addcode_"), AdminStates.waiting_product_for_code)
async def admin_add_code_product_selected(callback: CallbackQuery, state: FSMContext):
    """Mahsulot tanlandi — link kiritishni kutish."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    product_id = int(callback.data.split("_")[1])
    await state.update_data(product_id=product_id)
    await state.set_state(AdminStates.waiting_gift_link)

    await callback.message.edit_text(
        "🔗 <b>Gift Linkni Yuboring</b>\n\n"
        "Fragment yoki Telegram Premium sovg'a linkini yuboring.\n"
        "Masalan: <code>https://t.me/premium?gift=...</code>\n\n"
        "Bir nechta link qo'shmoqchi bo'lsangiz, har birini alohida xabar sifatida yuboring.\n"
        "Tugatgach, <b>❌ Bekor Qilish</b> tugmasini bosing.",
        reply_markup=cancel_admin_action_kb(),
        parse_mode="HTML"
    )
    await callback.answer()


@router.message(AdminStates.waiting_gift_link)
async def admin_receive_gift_link(message: Message, state: FSMContext):
    """Admin tomonidan yuborilgan gift linkni saqlash."""
    if message.from_user.id not in ADMIN_IDS:
        return

    data = await state.get_data()
    product_id = data.get("product_id")
    gift_link = message.text.strip()

    # URL tekshirish (oddiy)
    if not gift_link.startswith("https://"):
        await message.answer(
            "⚠️ Noto'g'ri format! Link <code>https://</code> bilan boshlanishi kerak.\n"
            "Qaytadan yuboring:",
            parse_mode="HTML",
            reply_markup=cancel_admin_action_kb()
        )
        return

    success = await add_gift_code(product_id=product_id, gift_link=gift_link)
    available = await count_available_codes(product_id)

    if success:
        await message.answer(
            f"✅ <b>Link muvaffaqiyatli qo'shildi!</b>\n\n"
            f"📦 Ushbu mahsulot uchun mavjud linklar soni: <b>{available}</b> ta\n\n"
            f"Yana link qo'shmoqchi bo'lsangiz, yuboring:",
            parse_mode="HTML",
            reply_markup=cancel_admin_action_kb()
        )
    else:
        await message.answer(
            f"⚠️ Bu link allaqachon bazada mavjud! Boshqa link yuboring:",
            reply_markup=cancel_admin_action_kb()
        )


# ─────────────────── STATISTIKA ───────────────────

@router.callback_query(F.data == "admin_stats")
async def show_stats(callback: CallbackQuery):
    """Umumiy statistika."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    stats = await get_total_stats()
    user_count = await count_users()

    text = (
        "📊 <b>Bot Statistikasi</b>\n\n"
        f"👥 Jami foydalanuvchilar: <b>{user_count}</b> ta\n\n"
        f"✅ Bajarilgan buyurtmalar: <b>{stats['total_completed']}</b> ta\n"
        f"⭐ Jami Stars tushumi: <b>{stats['total_stars']:,}</b>\n"
        f"⏳ Yetkazilishi kutilayotgan: <b>{stats['pending_delivery']}</b> ta\n\n"
    )

    # Zaxira holati
    stock = await get_stock_summary()
    text += "📦 <b>Zaxira:</b>\n"
    for item in stock:
        icon = "✅" if item["available"] > 0 else "❌"
        text += f"  {icon} {item['emoji']} {item['name']}: <b>{item['available']}</b> ta\n"

    await callback.message.edit_text(
        text,
        reply_markup=admin_back_kb(),
        parse_mode="HTML"
    )
    await callback.answer()


# ─────────────────── KUTILAYOTGAN BUYURTMALAR ───────────────────

@router.callback_query(F.data == "admin_pending")
async def show_pending_orders(callback: CallbackQuery):
    """Yetkazilishi kutilayotgan buyurtmalar."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    orders = await get_pending_delivery_orders()

    if not orders:
        await callback.message.edit_text(
            "✅ <b>Kutilayotgan buyurtmalar yo'q!</b>\n\nHamma buyurtmalar bajarilgan.",
            reply_markup=admin_back_kb(),
            parse_mode="HTML"
        )
        await callback.answer()
        return

    for order in orders:
        username_str = f"@{order['username']}" if order['username'] else "username_yoq"
        await callback.message.answer(
            f"⏳ <b>Kutilayotgan Buyurtma #{order['id']}</b>\n\n"
            f"👤 {order['full_name']} ({username_str})\n"
            f"🆔 User ID: <code>{order['user_id']}</code>\n"
            f"📦 Mahsulot: {order['product_name']}\n"
            f"⭐ To'langan: {order['stars_amount']} Stars\n"
            f"📅 Sana: {order['created_at'][:16]}",
            reply_markup=admin_pending_order_kb(
                order_id=order["id"],
                user_id=order["user_id"],
                product_id=order["product_id"]
            ),
            parse_mode="HTML"
        )

    await callback.answer()


@router.callback_query(F.data.startswith("send_pending_"))
async def send_pending_gift(callback: CallbackQuery, bot: Bot):
    """Kutilayotgan buyurtmaga link yuborish."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    # Callback data: send_pending_{order_id}_{user_id}_{product_id}
    # parts[0]=send, parts[1]=pending, parts[2]=order_id, parts[3]=user_id, parts[4]=product_id
    parts = callback.data.split("_")
    order_id = int(parts[2])
    user_id = int(parts[3])
    product_id = int(parts[4])

    code = await get_available_code(product_id)

    if not code:
        await callback.answer(
            "❌ Zaxirada bu mahsulot uchun link yo'q! Avval link qo'shing.",
            show_alert=True
        )
        return

    await mark_code_used(code_id=code["id"], user_id=user_id, order_id=order_id)
    await complete_order(
        order_id=order_id,
        gift_code_id=code["id"],
        charge_id="manual_delivery"
    )

    # Foydalanuvchiga link yuborish
    try:
        await bot.send_message(
            user_id,
            f"🎉 <b>Sizning Premium Sovg'angiz Tayyor!</b>\n\n"
            f"Buyurtma ID: #{order_id}\n\n"
            f"🔗 Premium linkingiz:\n{code['gift_link']}\n\n"
            f"⚠️ <i>Ushbu link bir marta ishlatiladi!</i>",
            parse_mode="HTML",
            disable_web_page_preview=True
        )
        await callback.message.edit_text(
            f"✅ <b>Link muvaffaqiyatli yuborildi!</b>\n\n"
            f"Buyurtma #{order_id} bajarildi.",
            reply_markup=admin_back_kb(),
            parse_mode="HTML"
        )
        await callback.answer("✅ Yuborildi!")
    except Exception as e:
        logger.error(f"send_pending_gift xatosi: {e}")
        await callback.answer(
            f"❌ Xabar yuborishda xato: {e}",
            show_alert=True
        )


# ─────────────────── BROADCAST ───────────────────

@router.callback_query(F.data == "admin_broadcast")
async def start_broadcast(callback: CallbackQuery, state: FSMContext):
    """Broadcast boshlash."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    user_count = await count_users()
    await callback.message.edit_text(
        f"📢 <b>Xabar Yuborish (Broadcast)</b>\n\n"
        f"Jami foydalanuvchilar: <b>{user_count}</b> ta\n\n"
        f"Barcha foydalanuvchilarga yuboriladigan xabarni yozing:\n"
        f"(HTML formatida yozishingiz mumkin: <b>bold</b>, <i>italic</i>, <code>code</code>)",
        reply_markup=cancel_admin_action_kb(),
        parse_mode="HTML"
    )
    await state.set_state(AdminStates.waiting_broadcast_message)
    await callback.answer()


@router.message(AdminStates.waiting_broadcast_message)
async def send_broadcast(message: Message, state: FSMContext, bot: Bot):
    """Broadcast xabarini barcha foydalanuvchilarga yuborish."""
    if message.from_user.id not in ADMIN_IDS:
        return

    await state.clear()
    user_ids = await get_all_user_ids()
    total = len(user_ids)
    success_count = 0
    fail_count = 0

    status_msg = await message.answer(
        f"📤 Yuborilmoqda... 0/{total}"
    )

    for i, uid in enumerate(user_ids, 1):
        try:
            await bot.send_message(uid, message.text, parse_mode="HTML")
            success_count += 1
        except Exception:
            fail_count += 1

        # Har 20 ta foydalanuvchida status yangilash
        if i % 20 == 0:
            try:
                await status_msg.edit_text(f"📤 Yuborilmoqda... {i}/{total}")
            except Exception:
                pass

    await status_msg.edit_text(
        f"✅ <b>Broadcast yakunlandi!</b>\n\n"
        f"📤 Yuborildi: <b>{success_count}</b> ta\n"
        f"❌ Xato: <b>{fail_count}</b> ta\n"
        f"📊 Jami: <b>{total}</b> ta",
        parse_mode="HTML",
        reply_markup=admin_back_kb()
    )


# ─────────────────── NARX O'ZGARTIRISH ───────────────────

@router.callback_query(F.data == "admin_prices")
async def admin_prices_start(callback: CallbackQuery, state: FSMContext):
    """Narxlarni o'zgartirish — mahsulot tanlash."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    products = await get_active_products()
    await callback.message.edit_text(
        "💰 <b>Narxni O'zgartirish</b>\n\nQaysi mahsulot narxini o'zgartirmoqchisiz?",
        reply_markup=admin_select_product_kb(products, action="setprice"),
        parse_mode="HTML"
    )
    await state.set_state(AdminStates.waiting_product_for_price)
    await callback.answer()


@router.callback_query(F.data.startswith("setprice_"), AdminStates.waiting_product_for_price)
async def admin_price_product_selected(callback: CallbackQuery, state: FSMContext):
    """Narx o'zgartirish uchun mahsulot tanlandi."""
    if callback.from_user.id not in ADMIN_IDS:
        await callback.answer("🚫 Ruxsat yo'q!", show_alert=True)
        return

    product_id = int(callback.data.split("_")[1])
    await state.update_data(product_id=product_id)
    await state.set_state(AdminStates.waiting_new_price)

    products = await get_active_products()
    product = next((p for p in products if p["id"] == product_id), None)

    if not product:
        await callback.answer("❌ Mahsulot topilmadi!", show_alert=True)
        await state.clear()
        return

    await callback.message.edit_text(
        f"💰 <b>{product['name']}</b>\n\n"
        f"Joriy narx: <b>{product['stars_price']} ⭐ Stars</b>\n\n"
        f"Yangi narxni (faqat raqam) yuboring:",
        reply_markup=cancel_admin_action_kb(),
        parse_mode="HTML"
    )
    await callback.answer()


@router.message(AdminStates.waiting_new_price)
async def admin_set_new_price(message: Message, state: FSMContext):
    """Yangi narxni saqlash."""
    if message.from_user.id not in ADMIN_IDS:
        return

    if not message.text.isdigit():
        await message.answer(
            "⚠️ Faqat raqam kiriting! Masalan: <code>750</code>",
            parse_mode="HTML",
            reply_markup=cancel_admin_action_kb()
        )
        return

    new_price = int(message.text)
    if new_price < 1:
        await message.answer("⚠️ Narx 1 dan katta bo'lishi kerak!")
        return

    data = await state.get_data()
    product_id = data.get("product_id")
    await update_product_price(product_id, new_price)
    await state.clear()

    await message.answer(
        f"✅ <b>Narx muvaffaqiyatli o'zgartirildi!</b>\n\n"
        f"Yangi narx: <b>{new_price} ⭐ Stars</b>",
        parse_mode="HTML",
        reply_markup=admin_back_kb()
    )