import hashlib

from asyncio import sleep

from aiogram import F
from aiogram.fsm.context import FSMContext
from aiogram.fsm.state import State, StatesGroup
from aiogram.types import CallbackQuery, Message
from sqlalchemy import delete, select
from sqlalchemy.ext.asyncio import AsyncSession

from database.models import Admin

from . import router
from .keyboard import (
    AdminPanelCallback,
    build_admin_back_kb_to_admins,
    build_admins_kb,
    build_role_selection_kb,
    build_single_admin_menu,
    build_token_result_kb,
)


class AdminState(StatesGroup):
    waiting_for_tg_id = State()


@router.callback_query(AdminPanelCallback.filter(F.action == "admins"))
async def show_admins(callback: CallbackQuery, session: AsyncSession):
    result = await session.execute(select(Admin.tg_id, Admin.role))
    admins = result.all()
    await callback.message.edit_text("👑 <b>Список админов</b>", reply_markup=build_admins_kb(admins))


@router.callback_query(AdminPanelCallback.filter(F.action == "add_admin"))
async def prompt_new_admin(callback: CallbackQuery, state: FSMContext):
    await callback.message.edit_text(
        "Введите <code>tg_id</code> нового админа:", reply_markup=build_admin_back_kb_to_admins()
    )
    await state.set_state(AdminState.waiting_for_tg_id)


@router.message(AdminState.waiting_for_tg_id)
async def save_new_admin(message: Message, session: AsyncSession, state: FSMContext):
    try:
        tg_id = int(message.text.strip())
    except ValueError:
        await message.answer("❌ Неверный формат. Введите числовой <code>tg_id</code>.")
        return

    result = await session.execute(select(Admin).where(Admin.tg_id == tg_id))
    if result.scalar_one_or_none():
        await message.answer("⚠️ Такой админ уже существует.")
    else:
        session.add(Admin(tg_id=tg_id, role="moderator", description="Добавлен вручную"))
        await session.commit()
        await message.answer(f"✅ Админ <code>{tg_id}</code> добавлен.", reply_markup=build_admin_back_kb_to_admins())

    await state.clear()


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("admin_menu|")))
async def open_admin_menu(callback: CallbackQuery, callback_data: AdminPanelCallback, session: AsyncSession):
    tg_id = int(callback_data.action.split("|")[1])

    result = await session.execute(select(Admin.role).where(Admin.tg_id == tg_id))
    admin = result.scalar_one_or_none()
    role = admin or "moderator"

    await callback.message.edit_text(
        f"👤 <b>Управление админом</b> <code>{tg_id}</code>", reply_markup=build_single_admin_menu(tg_id, role)
    )


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("generate_token|")))
async def generate_token(callback: CallbackQuery, callback_data: AdminPanelCallback, session: AsyncSession):
    tg_id = int(callback_data.action.split("|")[1])

    result = await session.execute(select(Admin).where(Admin.tg_id == tg_id))
    admin = result.scalar_one_or_none()
    if not admin:
        await callback.message.edit_text("❌ Админ не найден.")
        return

    token = Admin.generate_token()
    token_hash = hashlib.sha256(token.encode()).hexdigest()
    admin.token = token_hash
    await session.commit()

    msg = await callback.message.edit_text(
        f"🎟 <b>Новый токен для</b> <code>{tg_id}</code>:\n\n"
        f"<code>{token}</code>\n\n"
        f"⚠️ Это сообщение исчезнет через 5 минут.",
        reply_markup=build_token_result_kb(token),
    )

    await sleep(300)
    try:
        await msg.delete()
    except Exception:
        pass


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("edit_role|")))
async def edit_admin_role(callback: CallbackQuery, callback_data: AdminPanelCallback):
    tg_id = int(callback_data.action.split("|")[1])
    await callback.message.edit_text(
        f"✏ <b>Выберите новую роль для</b> <code>{tg_id}</code>:", reply_markup=build_role_selection_kb(tg_id)
    )


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("set_role|")))
async def set_admin_role(callback: CallbackQuery, callback_data: AdminPanelCallback, session: AsyncSession):
    try:
        _, tg_id_str, role = callback_data.action.split("|")
        tg_id = int(tg_id_str)
        if role not in ("superadmin", "moderator"):
            raise ValueError
    except Exception:
        await callback.message.edit_text("❌ Неверный формат.")
        return

    if tg_id == callback.from_user.id:
        await callback.message.edit_text(
            "🚫 <b>Нельзя изменить свою собственную роль!</b>", reply_markup=build_single_admin_menu(tg_id)
        )
        return

    result = await session.execute(select(Admin).where(Admin.tg_id == tg_id))
    admin = result.scalar_one_or_none()
    if not admin:
        await callback.message.edit_text("❌ Админ не найден.")
        return

    admin.role = role
    await session.commit()

    await callback.message.edit_text(
        f"✅ Роль админа <code>{tg_id}</code> изменена на <b>{role}</b>.", reply_markup=build_single_admin_menu(tg_id)
    )


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("delete_admin|")))
async def delete_admin(callback: CallbackQuery, callback_data: AdminPanelCallback, session: AsyncSession):
    tg_id = int(callback_data.action.split("|")[1])

    await session.execute(delete(Admin).where(Admin.tg_id == tg_id))
    await session.commit()

    await callback.message.edit_text(
        f"🗑 Админ <code>{tg_id}</code> удалён.", reply_markup=build_admin_back_kb_to_admins()
    )