"""Compact Device child for the shared saved display preferences."""

from typing import Protocol

from openpilot.starpilot.ui.feature_settings_state import FeatureSettingsRequest, FeatureSettingsState, row_change
from openpilot.system.ui.lib.application import gui_app
from openpilot.system.ui.widgets.scroller import NavScroller
from openpilot.selfdrive.ui.mici.widgets.button import BigButton, GreyBigButton


class DisplaySession(Protocol):
  def display_snapshot(self) -> FeatureSettingsState: ...
  def display_request(self, request: FeatureSettingsRequest) -> bool: ...


class DisplayCompact:
  def __init__(self, session: DisplaySession):
    self.session = session

  def entry_button(self) -> BigButton:
    button = BigButton("display", "brightness and screen timing")
    button.set_click_callback(self.open)
    return button

  def open(self) -> None:
    page = NavScroller()
    self._populate(page)
    gui_app.push_widget(page)

  def _populate(self, page: NavScroller) -> None:
    state = self.session.display_snapshot()
    cards = [GreyBigButton("display", "saved brightness and screen timing")]
    for row in state.rows:
      description = row.value + (" " + row.unit if row.unit and row.value != "Auto" else "") + (". " + row.reason if row.reason else "")
      if not row.available:
        cards.append(GreyBigButton(row.label.lower(), description.lower()))
        continue
      numeric = row.step > 0 and row.value != "Auto" and not row.repair_value
      for direction in ((-1, 1) if numeric else (1,)):
        label = row.label.lower() + (" set " + row.repair_value.lower() if row.repair_value else
                                    " -" if numeric and direction < 0 else " +" if numeric else "")
        button = BigButton(label, description.lower())
        button.set_enabled(row_change(row, direction) is not None)
        def clicked(source=row, step=direction) -> None:
          request = row_change(source, step)
          if request is not None and self.session.display_request(request):
            self._populate(page)
        button.set_click_callback(clicked)
        cards.append(button)
    page._scroller.items.clear()
    page._scroller.add_widgets(cards)