from typing import Optional

from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
from aiogram.utils.keyboard import InlineKeyboardBuilder

from db.models import Category, Product
from dto.cart import CartItemDTO


def pagination_row(
    *,
    page: int,
    prev_cb: Optional[str] = None,
    next_cb: Optional[str] = None,
) -> list[InlineKeyboardButton]:
    row = []

    if prev_cb:
        row.append(InlineKeyboardButton(text="⬅️", callback_data=prev_cb))

    row.append(InlineKeyboardButton(text=str(page + 1), callback_data="..."))

    if next_cb:
        row.append(InlineKeyboardButton(text="➡️", callback_data=next_cb))

    return row


def cart_btn(cart_items: int) -> InlineKeyboardButton:
    return InlineKeyboardButton(text=f"🛒 Корзина ({cart_items})", callback_data="cart")


def get_back_to_catalogue(
    cat_id: int, *, text: Optional[str] = "⬅️ Назад"
) -> InlineKeyboardMarkup:
    return InlineKeyboardBuilder(
        [[InlineKeyboardButton(text=text, callback_data=f"cat:{cat_id}")]]
    ).as_markup()


def main_menu_kb(cart_items: int) -> InlineKeyboardMarkup:
    return InlineKeyboardBuilder(
        [
            [
                InlineKeyboardButton(text="📦 Каталог", callback_data="cat:root"),
                InlineKeyboardButton(text="🔍", callback_data="find"),
            ],
            [cart_btn(cart_items)],
        ]
    ).as_markup()


def render_category(
    children: list[Category],
    parent_id: Optional[int] = None,
    show_menu: bool = False,
) -> InlineKeyboardMarkup:
    btns = [
        InlineKeyboardButton(
            text=category.name,
            callback_data=f"cat:{category.id}",
        )
        for category in children
    ]

    nav = []

    if parent_id is not None:
        nav.append(
            InlineKeyboardButton(text="⬅️ Назад", callback_data=f"cat:{parent_id}")
        )

    if show_menu:
        nav.append(InlineKeyboardButton(text="⬅️ Назад", callback_data="menu:main"))

    return InlineKeyboardBuilder(
        [btns[i : i + 2] for i in range(0, len(children), 2)] + [nav],
    ).as_markup()


def render_products(
    products: list[Product],
    *,
    parent_id: int,
    cat_id: int,
    page: int = 0,
    show_prev: Optional[bool] = False,
    show_next: Optional[bool] = False,
) -> InlineKeyboardMarkup:
    btns = [
        InlineKeyboardButton(text=product.name, callback_data=f"product:{product.id}")
        for product in products
    ]

    nav = pagination_row(
        page=page,
        prev_cb=f"products:{cat_id}:{page - 1}" if show_prev else None,
        next_cb=f"products:{cat_id}:{page + 1}" if show_next else None,
    )

    return InlineKeyboardBuilder(
        [
            [
                InlineKeyboardButton(
                    text="⬅️ Назад",
                    callback_data=f"cat:{parent_id}",
                )
            ]
        ]
        + [btns[i : i + 2] for i in range(0, len(products), 2)]
        + [nav]
    ).as_markup()


def render_product_interactions(
    *, product_id: int, category_id: int, show_cart: bool = False, cart_amount: int = 0
) -> InlineKeyboardMarkup:
    btns: list[list[InlineKeyboardButton]] = []

    if show_cart:
        btns.append(
            [
                InlineKeyboardButton(
                    text="➖", callback_data=f"cart_action:remove:{product_id}"
                ),
                InlineKeyboardButton(text=f"🛒 {cart_amount}", callback_data="..."),
                InlineKeyboardButton(
                    text="➕", callback_data=f"cart_action:add:{product_id}"
                ),
            ]
        )
        btns.append(
            [
                InlineKeyboardButton(
                    text="❌ Удалить из корзины",
                    callback_data=f"cart_action:clear:{product_id}",
                )
            ]
        )

    else:
        btns.append(
            [
                InlineKeyboardButton(
                    text="🛒 В корзину", callback_data=f"cart_action:add:{product_id}"
                )
            ]
        )

    btns.append([InlineKeyboardButton(text="⬅️", callback_data=f"cat:{category_id}")])

    return InlineKeyboardBuilder(btns).as_markup()


def render_cart(
    cart_items: list[CartItemDTO],
    *,
    page: int = 0,
    show_prev: Optional[bool] = False,
    show_next: Optional[bool] = False,
) -> InlineKeyboardMarkup:
    btns = [
        InlineKeyboardButton(
            text=f"{cart_item.quantity} | {cart_item.name} | {cart_item.total}₽",
            callback_data=f"product:{cart_item.product_id}",
        )
        for cart_item in cart_items
    ]

    nav = pagination_row(
        page=page,
        prev_cb=f"cart:{page - 1}" if show_prev else None,
        next_cb=f"cart:{page + 1}" if show_next else None,
    )

    return InlineKeyboardBuilder(
        [
            [
                InlineKeyboardButton(
                    text="⬅️ Назад",
                    callback_data="menu:main",
                )
            ]
        ]
        + [btns[i : i + 2] for i in range(0, len(cart_items), 2)]
        + [nav]
    ).as_markup()