from re import Match
from aiogram import Router, F
from aiogram.types import CallbackQuery, Message
from aiogram.filters import Command
from aiogram.fsm.context import FSMContext
from sqlalchemy.ext.asyncio import AsyncSession

from config import PAGE_SIZE
from misc.kb import main_menu_kb, render_category
from misc.kb.client import get_back_to_catalogue, render_products
from repositories.categories import CategoriesRepository
from repositories.products import ProductRepository
from services.orders import OrderService

router = Router()


@router.message(Command("start"))
async def main_menu(msg: Message, state: FSMContext):
    await state.clear()

    await msg.answer(
        "hii!", reply_markup=main_menu_kb(msg.from_user.id)
    )  # TODO: Write a welcome message


@router.callback_query(F.data.startswith("menu:"))
async def main_menu_cb(cb: CallbackQuery, state: FSMContext):
    await state.clear()

    await cb.message.edit_text(
        "hii!", reply_markup=main_menu_kb(cb.from_user.id)
    )  # TODO: Write a welcome message


@router.message(Command("orders"))
async def get_orders(
    msg: Message,
    state: FSMContext,
    order_service: OrderService,
    session: AsyncSession,
):
    await state.clear()

    count = await order_service.get_order_count(session, msg.from_user.id)
    await msg.answer(f"you have {count} orders.")


@router.callback_query(F.data.startswith("cat:"))
async def subcatalogue(
    cb: CallbackQuery,
    state: FSMContext,
    session: AsyncSession,
    categories_repo: CategoriesRepository,
    products_repo: ProductRepository,
):
    await state.clear()

    cat_id = cb.data.split(":")[1]

    if cat_id == "root":
        children = await categories_repo.get_categories_by_parent_id(session)
        kb = render_category(children, show_menu=True)
        await cb.message.edit_text(
            "category selection",
            reply_markup=kb,
        )
        return

    cat_id = int(cat_id)

    children = await categories_repo.get_categories_by_parent_id(session, cat_id)
    category = await categories_repo.get_category_by_id(session, cat_id)
    parent_id = category.parent_id or "root"

    if not children:
        products = await products_repo.get_product_by_category(
            session, cat_id, limit=PAGE_SIZE + 1, offset=0
        )
        products_len = len(products)

        if not products:
            await cb.message.edit_text(
                "🍃 Здесь ничего нет...",
                reply_markup=get_back_to_catalogue(parent_id),
            )
            return

        await cb.message.edit_text(
            "hya",
            reply_markup=render_products(
                products[:PAGE_SIZE],
                cat_id=cat_id,
                page=0,
                show_prev=products_len < 0,
                show_next=products_len > PAGE_SIZE,
            ),
        )
        return

    kb = render_category(children, parent_id)

    await cb.message.edit_text(
        "category selection",
        reply_markup=kb,
    )


@router.callback_query(
    F.data.regexp(r"products:(?P<category_id>.*):(?P<page_id>\d+)").as_(
        "pagination_match"
    )
)
async def products_pagination(
    cb: CallbackQuery,
    state: FSMContext,
    pagination_match: Match[str],
    session: AsyncSession,
    products_repo: ProductRepository,
):
    await state.clear()

    pagination_data = pagination_match.groupdict()
    category_id = int(pagination_data.get("category_id"))
    page_id = int(pagination_data.get("page_id", 0))

    products = await products_repo.get_product_by_category(
        session, category_id, limit=PAGE_SIZE + 1, offset=page_id * PAGE_SIZE
    )
    products_len = len(products)

    await cb.message.edit_reply_markup(
        reply_markup=render_products(
            products[:PAGE_SIZE],
            cat_id=category_id,
            page=page_id,
            show_prev=page_id > 0,
            show_next=products_len > PAGE_SIZE,
        ),
    )