import pytest

from textual.app import App, ComposeResult
from textual.reactive import var
from textual.widgets import Label, Tab, TabbedContent, TabPane, Tabs


async def test_tabbed_content_switch_via_ui():
    """Check tab navigation via the user interface."""

    class TabbedApp(App):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                with TabPane("foo", id="foo"):
                    yield Label("Foo", id="foo-label")
                with TabPane("bar", id="bar"):
                    yield Label("Bar", id="bar-label")
                with TabPane("baz", id="baz"):
                    yield Label("Baz", id="baz-label")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        # Check first tab
        assert tabbed_content.active == "foo"
        await pilot.pause()
        assert app.query_one("#foo-label").region
        assert not app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region

        # Click second tab
        await pilot.click("Tab#bar")
        assert tabbed_content.active == "bar"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region

        # Click third tab
        await pilot.click("Tab#baz")
        assert tabbed_content.active == "baz"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert not app.query_one("#bar-label").region
        assert app.query_one("#baz-label").region

        # Press left
        await pilot.press("left")
        assert tabbed_content.active == "bar"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region

        # Press right
        await pilot.press("right")
        assert tabbed_content.active == "baz"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert not app.query_one("#bar-label").region
        assert app.query_one("#baz-label").region


async def test_tabbed_content_switch_via_code():
    """Check tab navigation via code."""

    class TabbedApp(App):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                with TabPane("foo", id="foo"):
                    yield Label("Foo", id="foo-label")
                with TabPane("bar", id="bar"):
                    yield Label("Bar", id="bar-label")
                with TabPane("baz", id="baz"):
                    yield Label("Baz", id="baz-label")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)

        # Check first tab
        assert tabbed_content.active == "foo"
        assert app.query_one("#foo-label").region
        assert not app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region

        # Click second tab
        tabbed_content.active = "bar"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region

        # Click third tab
        tabbed_content.active = "baz"
        await pilot.pause()
        assert not app.query_one("#foo-label").region
        assert not app.query_one("#bar-label").region
        assert app.query_one("#baz-label").region

        # Check fail with non existent tab
        with pytest.raises(ValueError):
            tabbed_content.active = "X"

        # Check fail with empty tab
        with pytest.raises(ValueError):
            tabbed_content.active = ""


async def test_tabbed_content_initial():
    """Checked tabbed content with non-default tab."""

    class TabbedApp(App):
        def compose(self) -> ComposeResult:
            with TabbedContent(initial="bar"):
                with TabPane("foo", id="foo"):
                    yield Label("Foo", id="foo-label")
                with TabPane("bar", id="bar"):
                    yield Label("Bar", id="bar-label")
                with TabPane("baz", id="baz"):
                    yield Label("Baz", id="baz-label")

    app = TabbedApp()
    async with app.run_test():
        tabbed_content = app.query_one(TabbedContent)
        assert tabbed_content.active == "bar"

        # Check only bar is visible
        assert not app.query_one("#foo-label").region
        assert app.query_one("#bar-label").region
        assert not app.query_one("#baz-label").region


async def test_tabbed_content_messages():
    class TabbedApp(App):
        message = None

        def compose(self) -> ComposeResult:
            with TabbedContent(initial="bar"):
                with TabPane("foo", id="foo"):
                    yield Label("Foo", id="foo-label")

                with TabPane("bar", id="bar"):
                    yield Label("Bar", id="bar-label")
                with TabPane("baz", id="baz"):
                    yield Label("Baz", id="baz-label")

        def on_tabbed_content_tab_activated(
            self, event: TabbedContent.TabActivated
        ) -> None:
            self.message = event

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        tabbed_content.active = "bar"
        await pilot.pause()
        assert isinstance(app.message, TabbedContent.TabActivated)
        assert app.message.tab.label.plain == "bar"


async def test_tabbed_content_add_later_from_empty():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            yield TabbedContent()

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.active == ""
        assert tabbed_content.tab_count == 0
        await tabbed_content.add_pane(TabPane("Test 1", id="test-1"))
        await pilot.pause()
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "test-1"
        await tabbed_content.add_pane(TabPane("Test 2", id="test-2"))
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert tabbed_content.active == "test-1"


async def test_tabbed_content_add_later_from_composed():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")
                yield TabPane("Test 2", id="initial-2")
                yield TabPane("Test 3", id="initial-3")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 3
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(TabPane("Test 4", id="test-1"))
        await pilot.pause()
        assert tabbed_content.tab_count == 4
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(TabPane("Test 5", id="test-2"))
        await pilot.pause()
        assert tabbed_content.tab_count == 5
        assert tabbed_content.active == "initial-1"


async def test_tabbed_content_add_before_id():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(TabPane("Added", id="new-1"), before="initial-1")
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert tabbed_content.active == "initial-1"
        assert [tab.id for tab in tabbed_content.query(Tab).results(Tab)] == [
            "new-1",
            "initial-1",
        ]


async def test_tabbed_content_add_before_pane():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(
            TabPane("Added", id="new-1"),
            before=pilot.app.query_one("TabPane#initial-1", TabPane),
        )
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert tabbed_content.active == "initial-1"
        assert [tab.id for tab in tabbed_content.query(Tab).results(Tab)] == [
            "new-1",
            "initial-1",
        ]


async def test_tabbed_content_add_before_badly():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        with pytest.raises(Tabs.TabError):
            await tabbed_content.add_pane(
                TabPane("Added", id="new-1"), before="unknown-1"
            )


async def test_tabbed_content_add_after():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(TabPane("Added", id="new-1"), after="initial-1")
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert tabbed_content.active == "initial-1"
        assert [tab.id for tab in tabbed_content.query(Tab).results(Tab)] == [
            "initial-1",
            "new-1",
        ]


async def test_tabbed_content_add_after_pane():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        await tabbed_content.add_pane(
            TabPane("Added", id="new-1"),
            after=pilot.app.query_one("TabPane#initial-1", TabPane),
        )
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert tabbed_content.active == "initial-1"
        assert [tab.id for tab in tabbed_content.query(Tab).results(Tab)] == [
            "initial-1",
            "new-1",
        ]


async def test_tabbed_content_add_after_badly():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        with pytest.raises(Tabs.TabError):
            await tabbed_content.add_pane(
                TabPane("Added", id="new-1"), after="unknown-1"
            )


async def test_tabbed_content_add_before_and_after():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 1
        assert tabbed_content.active == "initial-1"
        with pytest.raises(Tabs.TabError):
            await tabbed_content.add_pane(
                TabPane("Added", id="new-1"), before="initial-1", after="initial-1"
            )


async def test_tabbed_content_removal():
    class TabbedApp(App[None]):
        cleared: var[int] = var(0)

        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")
                yield TabPane("Test 2", id="initial-2")
                yield TabPane("Test 3", id="initial-3")

        def on_tabbed_content_cleared(self) -> None:
            self.cleared += 1

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 3
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-1"
        await tabbed_content.remove_pane("initial-1")
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-2"
        await tabbed_content.remove_pane("initial-2")
        await pilot.pause()
        assert tabbed_content.tab_count == 1
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-3"
        await tabbed_content.remove_pane("initial-3")
        await pilot.pause()
        assert tabbed_content.tab_count == 0
        assert pilot.app.cleared == 1
        assert tabbed_content.active == ""


async def test_tabbed_content_reversed_removal():
    class TabbedApp(App[None]):
        cleared: var[int] = var(0)

        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")
                yield TabPane("Test 2", id="initial-2")
                yield TabPane("Test 3", id="initial-3")

        def on_tabbed_content_cleared(self) -> None:
            self.cleared += 1

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 3
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-1"
        await tabbed_content.remove_pane("initial-3")
        await pilot.pause()
        assert tabbed_content.tab_count == 2
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-1"
        await tabbed_content.remove_pane("initial-2")
        await pilot.pause()
        assert tabbed_content.tab_count == 1
        assert pilot.app.cleared == 0
        assert tabbed_content.active == "initial-1"
        await tabbed_content.remove_pane("initial-1")
        await pilot.pause()
        assert tabbed_content.tab_count == 0
        assert pilot.app.cleared == 1
        assert tabbed_content.active == ""


async def test_tabbed_content_clear():
    class TabbedApp(App[None]):
        cleared: var[int] = var(0)

        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield TabPane("Test 1", id="initial-1")
                yield TabPane("Test 2", id="initial-2")
                yield TabPane("Test 3", id="initial-3")

        def on_tabbed_content_cleared(self) -> None:
            self.cleared += 1

    async with TabbedApp().run_test() as pilot:
        tabbed_content = pilot.app.query_one(TabbedContent)
        assert tabbed_content.tab_count == 3
        assert tabbed_content.active == "initial-1"
        assert pilot.app.cleared == 0
        await tabbed_content.clear_panes()
        await pilot.pause()
        assert tabbed_content.tab_count == 0
        assert tabbed_content.active == ""
        assert pilot.app.cleared == 1


async def test_disabling_does_not_deactivate_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

        def on_mount(self) -> None:
            self.query_one("Tab#tab-1").disabled = True

    app = TabbedApp()
    async with app.run_test():
        assert app.query_one(Tabs).active == "tab-1"


async def test_disabled_tab_cannot_be_clicked():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one("Tab#tab-2").disabled = True

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"


async def test_disabling_via_tabbed_content():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one(TabbedContent).disable_tab("tab-2")

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"


async def test_disabling_via_tab_pane():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one("TabPane#tab-2").disabled = True

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.pause()
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"


async def test_creating_disabled_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                with TabPane("first"):
                    yield Label("hello")
                with TabPane("second", disabled=True):
                    yield Label("world")

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"


async def test_navigation_around_disabled_tabs():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")
                yield Label("tab-3")
                yield Label("tab-4")

        def on_mount(self) -> None:
            self.query_one("Tab#tab-1").disabled = True
            self.query_one("Tab#tab-3").disabled = True

    app = TabbedApp()
    async with app.run_test():
        tabs = app.query_one(Tabs)
        assert tabs.active == "tab-1"
        tabs.action_next_tab()
        assert tabs.active == "tab-2"
        tabs.action_next_tab()
        assert tabs.active == "tab-4"
        tabs.action_next_tab()
        assert tabs.active == "tab-2"
        tabs.action_previous_tab()
        assert tabs.active == "tab-4"


async def test_reenabling_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one("Tab#tab-2").disabled = True

        def reenable(self) -> None:
            app.query_one("Tab#tab-2").disabled = False

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"
        app.reenable()
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-2"


async def test_reenabling_via_tabbed_content():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one(TabbedContent).disable_tab("tab-2")

        def reenable(self) -> None:
            self.query_one(TabbedContent).enable_tab("tab-2")

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"
        app.reenable()
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-2"


async def test_reenabling_via_tab_pane():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

        def on_mount(self) -> None:
            self.query_one("TabPane#tab-2").disabled = True

        def reenable(self) -> None:
            self.query_one("TabPane#tab-2").disabled = False

    app = TabbedApp()
    async with app.run_test() as pilot:
        await pilot.pause()
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-1"
        app.reenable()
        await pilot.click("Tab#tab-2")
        assert app.query_one(Tabs).active == "tab-2"


async def test_disabling_unknown_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

    app = TabbedApp()
    async with app.run_test():
        with pytest.raises(Tabs.TabError):
            app.query_one(TabbedContent).disable_tab("foo")


async def test_enabling_unknown_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

    app = TabbedApp()
    async with app.run_test():
        with pytest.raises(Tabs.TabError):
            app.query_one(TabbedContent).enable_tab("foo")


async def test_hide_unknown_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

    app = TabbedApp()
    async with app.run_test():
        with pytest.raises(Tabs.TabError):
            app.query_one(TabbedContent).hide_tab("foo")


async def test_show_unknown_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

    app = TabbedApp()
    async with app.run_test():
        with pytest.raises(Tabs.TabError):
            app.query_one(TabbedContent).show_tab("foo")


async def test_hide_show_messages():
    hide_msg = False
    show_msg = False

    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

        def on_tabs_tab_hidden(self) -> None:
            nonlocal hide_msg
            hide_msg = True

        def on_tabs_tab_shown(self) -> None:
            nonlocal show_msg
            show_msg = True

    app = TabbedApp()
    async with app.run_test() as pilot:
        app.query_one(TabbedContent).hide_tab("tab-1")
        await pilot.pause()
        assert hide_msg
        app.query_one(TabbedContent).show_tab("tab-1")
        await pilot.pause()
        assert show_msg


async def test_hide_last_tab_means_no_tab_active():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        tabbed_content.hide_tab("tab-1")
        await pilot.pause()
        assert not tabbed_content.active


async def test_hiding_tabs_moves_active_to_next_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")
                yield Label("tab-3")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        tabbed_content.hide_tab("tab-1")
        await pilot.pause()
        assert tabbed_content.active == "tab-2"
        tabbed_content.hide_tab("tab-2")
        await pilot.pause()
        assert tabbed_content.active == "tab-3"


async def test_showing_tabs_does_not_change_active_tab():
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")
                yield Label("tab-3")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        tabbed_content.hide_tab("tab-1")
        tabbed_content.hide_tab("tab-2")
        await pilot.pause()
        # sanity check
        assert tabbed_content.active == "tab-3"

        tabbed_content.show_tab("tab-1")
        tabbed_content.show_tab("tab-2")
        assert tabbed_content.active == "tab-3"


@pytest.mark.parametrize("tab_id", ["tab-1", "tab-2"])
async def test_showing_first_tab_activates_tab(tab_id: str):
    class TabbedApp(App[None]):
        def compose(self) -> ComposeResult:
            with TabbedContent():
                yield Label("tab-1")
                yield Label("tab-2")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabbed_content = app.query_one(TabbedContent)
        tabbed_content.hide_tab("tab-1")
        tabbed_content.hide_tab("tab-2")
        await pilot.pause()
        # sanity check
        assert not tabbed_content.active

        tabbed_content.show_tab(tab_id)
        await pilot.pause()
        assert tabbed_content.active == tab_id


async def test_disabling_nested_tabs():
    """Regression test for https://github.com/Textualize/textual/issues/3145."""

    class TabbedApp(App):
        def compose(self) -> ComposeResult:
            with TabbedContent(id="tabbed-content"):
                with TabPane("Tab Pane 1"):
                    yield Label("foo")
                with TabPane("Tab Pane 2"):
                    yield Label("bar")
                with TabPane("Tab Pane 3"):
                    with TabbedContent():
                        with TabPane("Inner Pane 1"):
                            yield Label("fizz")
                        with TabPane("Inner Pane 2"):
                            yield Label("bang")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabber = app.query_one("#tabbed-content", expect_type=TabbedContent)
        tabber.disable_tab("tab-1")
        await pilot.pause()
        tabber.enable_tab("tab-1")
        await pilot.pause()


async def test_hiding_nested_tabs():
    """Regression test for https://github.com/Textualize/textual/issues/3145."""

    class TabbedApp(App):
        def compose(self) -> ComposeResult:
            with TabbedContent(id="tabbed-content"):
                with TabPane("Tab Pane 1"):
                    yield Label("foo")
                with TabPane("Tab Pane 2"):
                    yield Label("bar")
                with TabPane("Tab Pane 3"):
                    with TabbedContent():
                        with TabPane("Inner Pane 1"):
                            yield Label("fizz")
                        with TabPane("Inner Pane 2"):
                            yield Label("bang")

    app = TabbedApp()
    async with app.run_test() as pilot:
        tabber = app.query_one("#tabbed-content", expect_type=TabbedContent)
        tabber.hide_tab("tab-1")
        await pilot.pause()
        tabber.show_tab("tab-1")
        await pilot.pause()