from __future__ import annotations
from typing import Iterable, List, Tuple, Optional
from telegram import InlineKeyboardButton, InlineKeyboardMarkup


class KbBuilder:
    @staticmethod
    def channels(channels: Iterable) -> InlineKeyboardMarkup:
        rows = [[InlineKeyboardButton(ch.title or str(ch.chat_id), callback_data=f"channel:{ch.id}")]
                for ch in channels]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def post_types() -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("Текст", callback_data="type:text"),
             InlineKeyboardButton("Фото", callback_data="type:photo")],
            [InlineKeyboardButton("Видео", callback_data="type:video"),
             InlineKeyboardButton("GIF", callback_data="type:animation")],
        ]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def parse_modes() -> InlineKeyboardMarkup:
        rows = [[InlineKeyboardButton("HTML", callback_data="fmt:HTML"),
                 InlineKeyboardButton("MarkdownV2", callback_data="fmt:MarkdownV2")]]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def send_confirm() -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("Отправить сейчас", callback_data="send:now")],
            [InlineKeyboardButton("Запланировать", callback_data="send:schedule")],
        ]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def templates_list(items: List, page: int, total: int, page_size: int) -> InlineKeyboardMarkup:
        rows: List[List[InlineKeyboardButton]] = []
        for t in items:
            rows.append([
                InlineKeyboardButton((t.title or t.name), callback_data=f"tpluse:{t.name}"),
                InlineKeyboardButton("👁 Предпросмотр", callback_data=f"tplprev:{t.name}")
            ])

        nav: List[InlineKeyboardButton] = []
        if page > 0:
            nav.append(InlineKeyboardButton("◀️ Назад", callback_data=f"tplpage:{page-1}"))
        if (page + 1) * page_size < total:
            nav.append(InlineKeyboardButton("Вперёд ▶️", callback_data=f"tplpage:{page+1}"))
        if nav:
            rows.append(nav)

        rows.append([InlineKeyboardButton("Отмена", callback_data="tpl:cancel")])
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def preview_actions() -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("✅ Использовать", callback_data="pv:use")],
            [InlineKeyboardButton("✏️ Изменить переменные", callback_data="pv:edit")],
            [InlineKeyboardButton("Отмена", callback_data="tpl:cancel")],
        ]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def tpl_types() -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("Текст", callback_data="tpltype:text"),
             InlineKeyboardButton("Фото", callback_data="tpltype:photo")],
            [InlineKeyboardButton("Видео", callback_data="tpltype:video"),
             InlineKeyboardButton("GIF", callback_data="tpltype:animation")],
        ]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def tpl_formats() -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("HTML (по умолчанию)", callback_data="tplfmt:HTML")],
            [InlineKeyboardButton("MarkdownV2", callback_data="tplfmt:MarkdownV2")],
        ]
        return InlineKeyboardMarkup(rows)

    @staticmethod
    def tpl_confirm_delete(tpl_id: int) -> InlineKeyboardMarkup:
        rows = [
            [InlineKeyboardButton("Да, удалить", callback_data=f"tpldelok:{tpl_id}")],
            [InlineKeyboardButton("Отмена", callback_data="tpl:cancel")],
        ]
        return InlineKeyboardMarkup(rows)