"""Общие UI-хелперы (Flet ≥ 0.80: show_dialog/pop_dialog, SnackBar через show_dialog)."""
import asyncio

import flet as ft


def confirm_dialog(page: ft.Page, title: str, text: str, on_confirm, danger: bool = True):
    """Модальный диалог подтверждения."""
    def close(e=None):
        page.pop_dialog()

    def yes(e):
        page.pop_dialog()
        on_confirm()

    dlg = ft.AlertDialog(
        modal=True,
        title=ft.Text(title),
        content=ft.Text(text),
        actions=[
            ft.TextButton("Отмена", on_click=close),
            ft.FilledButton(
                "Подтвердить", on_click=yes,
                style=ft.ButtonStyle(bgcolor=ft.Colors.RED_700 if danger else None),
            ),
        ],
    )
    page.show_dialog(dlg)


def snack(page: ft.Page, text: str, error: bool = False):
    page.show_dialog(ft.SnackBar(
        ft.Text(text),
        bgcolor=ft.Colors.RED_700 if error else ft.Colors.GREEN_700,
        open=True,
    ))


def log_view(initial: str = "") -> ft.ListView:
    """Скроллящаяся панель лога."""
    return ft.ListView(expand=True, spacing=2, auto_scroll=True)


def append_log(lv: ft.ListView, line: str):
    lv.controls.append(
        ft.Text(line, size=12, font_family="Consolas", selectable=True)
    )
    try:
        lv.update()
    except Exception:
        pass


def open_dialog(page: ft.Page, dlg: ft.AlertDialog):
    page.show_dialog(dlg)


def close_dialog(page: ft.Page):
    page.pop_dialog()


def fmt_mb(v: float) -> str:
    if v >= 1024:
        return f"{v/1024:.1f} ГБ"
    return f"{v:.0f} МБ"