"""Flet GUI router and shell.

Provides:
- Top navigation bar with the 6 pages (Главная / Команды / Макросы / Расписание / Память / Плагины / Настройки)
- Page swap on click, no full reload
- Dark theme matching the Tauri GUI vibe

Each page lives in `gui/pages/<name>.py` and exposes `build(page) -> Control`.
"""

import flet as ft

from gui.pages import home, commands, macros, scheduler, memory, plugins, settings


PAGES = [
    ("Главная", home.build),
    ("Команды", commands.build),
    ("Макросы", macros.build),
    ("Расписание", scheduler.build),
    ("Память", memory.build),
    ("Плагины", plugins.build),
    ("Настройки", settings.build),
]


def _make_app(page: ft.Page):
    page.title = "J.A.R.V.I.S. — Python GUI"
    page.theme_mode = ft.ThemeMode.DARK
    page.window.width = 940
    page.window.height = 720
    page.padding = 0
    page.bgcolor = "#0a1419"

    content_holder = ft.Container(expand=True, padding=20)

    def go(idx: int):
        nav.selected_index = idx
        title, builder = PAGES[idx]
        try:
            content_holder.content = builder(page)
        except (RuntimeError, ValueError, OSError) as exc:
            content_holder.content = ft.Text(
                f"Не удалось открыть «{title}»:\n{exc}",
                color="red",
            )
        page.update()

    nav = ft.NavigationRail(
        selected_index=0,
        label_type=ft.NavigationRailLabelType.ALL,
        min_width=80,
        min_extended_width=180,
        bgcolor="#0d1b21",
        destinations=[
            ft.NavigationRailDestination(icon=ft.Icons.HOME, label="Главная"),
            ft.NavigationRailDestination(icon=ft.Icons.LIST_ALT, label="Команды"),
            ft.NavigationRailDestination(icon=ft.Icons.PLAY_CIRCLE_OUTLINE, label="Макросы"),
            ft.NavigationRailDestination(icon=ft.Icons.SCHEDULE, label="Расписание"),
            ft.NavigationRailDestination(icon=ft.Icons.MEMORY, label="Память"),
            ft.NavigationRailDestination(icon=ft.Icons.EXTENSION, label="Плагины"),
            ft.NavigationRailDestination(icon=ft.Icons.SETTINGS, label="Настройки"),
        ],
        on_change=lambda e: go(int(e.control.selected_index)),
    )

    layout = ft.Row(
        controls=[
            nav,
            ft.VerticalDivider(width=1, color="#1f3540"),
            content_holder,
        ],
        expand=True,
    )

    page.add(layout)
    go(0)


def run():
    ft.app(target=_make_app)