"""The surface picker and 3D preview are one set of widgets shared by two pages."""

from __future__ import annotations


def _inside(widget, page) -> bool:
    while widget is not None:
        if widget is page:
            return True
        widget = widget.parentWidget()
    return False


def test_the_views_follow_the_open_tab(make_window):
    window = make_window()
    finger, sequence = window.finger_panel, window.sequence_panel
    preview, picker = finger.preview, finger.view

    window.workspace.set_current_key("sequence")
    assert _inside(preview, sequence) and _inside(picker, sequence)
    assert not sequence.preview_label.isVisibleTo(sequence)
    assert finger.views_lent

    window.workspace.set_current_key("finger")
    assert _inside(preview, finger) and _inside(picker, finger)
    assert sequence.preview_label.isVisibleTo(sequence) or not sequence.has_views
    assert not finger.views_lent

    # Going back and forth never creates a second copy.
    window.workspace.set_current_key("sequence")
    window.workspace.set_current_key("axes")
    assert finger.preview is preview and finger.view is picker
    assert _inside(preview, finger)
    window.close()


def test_a_point_picked_on_the_sequence_page_is_the_geometry_pages_point(make_window):
    window = make_window()
    window.workspace.set_current_key("sequence")
    seen: list[tuple[int, int]] = []
    window.finger_panel.pickRequested.connect(lambda x, y: seen.append((x, y)))
    window.finger_panel.view.pixelPicked.emit(10, 20)
    assert seen == [(10, 20)]
    window.close()


def test_the_sequence_page_gives_the_views_room_and_drops_the_long_legend(make_window):
    window = make_window()
    finger, sequence = window.finger_panel, window.sequence_panel
    window.workspace.set_current_key("sequence")
    assert finger.preview.parentWidget().minimumHeight() >= 400
    assert not finger.legend_label.isVisibleTo(finger.legend_label.parentWidget())
    window.workspace.set_current_key("finger")
    assert finger.preview.parentWidget().minimumHeight() == 0
    assert not finger.legend_label.isHidden()
    window.close()