import hashlib
import hmac
import logging
import time
import uuid

from aiogram import F, Router, types
from aiogram.fsm.context import FSMContext
from aiogram.fsm.state import State, StatesGroup
from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
from aiogram.utils.keyboard import InlineKeyboardBuilder
from aiohttp import web
import requests

from config import FREEKASSA_API_KEY, FREEKASSA_SHOP_ID
from database import add_payment, update_balance
from handlers.payments.utils import send_payment_success_notification
from handlers.texts import PAYMENT_OPTIONS

router = Router()
logging.basicConfig(level=logging.DEBUG)


class ReplenishBalanceState(StatesGroup):
    choosing_amount_freekassa = State()
    waiting_for_payment_confirmation_freekassa = State()
    entering_custom_amount_freekassa = State()


def generate_signature(params, api_key):
    sorted_params = {k: params[k] for k in sorted(params)}
    sign_string = "|".join(str(value) for value in sorted_params.values())
    return hmac.new(api_key.encode(), sign_string.encode(), hashlib.sha256).hexdigest()


async def create_payment(user_id, amount, email, ip):
    payment_id = str(uuid.uuid4())
    nonce = int(time.time() * 1000)
    params = {
        "shopId": FREEKASSA_SHOP_ID,
        "amount": amount,
        "currency": "RUB",
        "paymentId": payment_id,
        "email": email,
        "ip": ip,
        "i": 6,
        "nonce": nonce,
    }
    params["signature"] = generate_signature(params, FREEKASSA_API_KEY)

    try:
        response = requests.post("https://api.freekassa.com/v1/orders/create", json=params)
        response_data = response.json()

        logging.debug(f"Ответ от FreeKassa при создании платежа: {response_data}")

        if response_data.get("type") == "success":
            return response_data["location"]
        else:
            logging.error(f"Ошибка создания платежа: {response_data}")
            return None

    except Exception as e:
        logging.error(f"Ошибка запроса к FreeKassa: {e}")
        return None


async def freekassa_webhook(request):
    data = await request.json()
    logging.debug(f"Получен вебхук от FreeKassa: {data}")

    logging.debug(f"Данные вебхука от FreeKassa: {data}")

    if data["status"] == "completed":
        user_id = data["metadata"]["user_id"]
        amount = float(data["amount"])
        await add_payment(int(user_id), float(amount), "freekassa")

        await update_balance(user_id, amount)
        await send_payment_success_notification(user_id, amount)

    return web.Response(status=200)


@router.callback_query(lambda c: c.data == "pay_freekassa")
async def process_callback_pay_freekassa(callback_query: types.CallbackQuery, state: FSMContext):
    builder = InlineKeyboardBuilder()
    for i in range(0, len(PAYMENT_OPTIONS), 2):
        if i + 1 < len(PAYMENT_OPTIONS):
            builder.row(
                InlineKeyboardButton(
                    text=PAYMENT_OPTIONS[i]["text"],
                    callback_data=f'freekassa_{PAYMENT_OPTIONS[i]["callback_data"]}',
                ),
                InlineKeyboardButton(
                    text=PAYMENT_OPTIONS[i + 1]["text"],
                    callback_data=f'freekassa_{PAYMENT_OPTIONS[i + 1]["callback_data"]}',
                ),
            )
        else:
            builder.row(
                InlineKeyboardButton(
                    text=PAYMENT_OPTIONS[i]["text"],
                    callback_data=f'freekassa_{PAYMENT_OPTIONS[i]["callback_data"]}',
                )
            )
    builder.row(
        InlineKeyboardButton(
            text="💰 Ввести свою сумму",
            callback_data="enter_custom_amount_freekassa",
        )
    )
    builder.row(InlineKeyboardButton(text="⬅️ Назад", callback_data="pay"))

    await callback_query.message.answer(
        text="Выберите сумму пополнения через FreeKassa:",
        reply_markup=builder.as_markup(),
    )

    await state.set_state(ReplenishBalanceState.choosing_amount_freekassa)


@router.callback_query(F.data.startswith("freekassa_amount|"))
async def process_amount_selection(callback_query: types.CallbackQuery, state: FSMContext):
    data = callback_query.data.split("|", 1)
    amount_str = data[1]
    try:
        amount = int(amount_str)
    except ValueError:
        await callback_query.message.answer("Некорректная сумма.")
        return

    user_email = f"{callback_query.message.chat.id}@solo.net"
    user_ip = callback_query.message.chat.id
    payment_url = await create_payment(callback_query.message.chat.id, amount, user_email, user_ip)

    if payment_url:
        confirm_keyboard = InlineKeyboardMarkup(
            inline_keyboard=[
                [InlineKeyboardButton(text=f"Оплатить {amount} рублей", url=payment_url)],
                [InlineKeyboardButton(text="⬅️ Назад", callback_data="pay")],
            ]
        )

        await callback_query.message.answer(
            f"Вы выбрали оплату на {amount} рублей. Перейдите по ссылке для завершения оплаты:",
            reply_markup=confirm_keyboard,
        )
    else:
        await callback_query.message.answer(
            "Ошибка при создании платежа. Попробуйте позже.",
        )


@router.callback_query(F.data == "enter_custom_amount_freekassa")
async def process_enter_custom_amount(callback_query: types.CallbackQuery, state: FSMContext):
    await callback_query.message.answer(text="Введите сумму пополнения:")
    await state.set_state(ReplenishBalanceState.entering_custom_amount_freekassa)


@router.message(ReplenishBalanceState.entering_custom_amount_freekassa)
async def process_custom_amount_input(message: types.Message, state: FSMContext):
    if message.text.isdigit():
        amount = int(message.text)
        if amount <= 0:
            await message.answer("Сумма должна быть больше нуля. Пожалуйста, введите сумму еще раз:")
            return

        user_email = f"{message.chat.id}@solo.net"
        user_ip = message.chat.id
        payment_url = await create_payment(message.chat.id, amount, user_email, user_ip)

        if payment_url:
            keyboard = InlineKeyboardMarkup(inline_keyboard=[[InlineKeyboardButton("Оплатить", url=payment_url)]])
            await message.answer(
                f"Вы выбрали оплату на {amount} рублей. Перейдите по ссылке для завершения оплаты:",
                reply_markup=keyboard,
            )
        else:
            await message.answer("Ошибка при создании платежа. Попробуйте позже.")

    else:
        await message.answer("Пожалуйста, введите корректную сумму.")