/*
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "unobstructed_area_service.h"

#include "applib/event_service_client.h"

//! @internal
typedef struct UnobstructedAreaState {
  EventServiceInfo event_info;
  UnobstructedAreaHandlers handlers;
  GRect area;
  void *context;
  bool is_subscribed;
  bool is_changing;
} UnobstructedAreaState;

//! @internal
//! Initializes the unobstructed area state
//! @param state Unobstructed area state belonging to the consuming task
//! @param current_y The current obstruction y to initialize the unobstructed area with
void unobstructed_area_service_init(UnobstructedAreaState *state, int16_t current_y);

//! @internal
//! Deinitializes the unobstructed area state
//! @param state Unobstructed area state belonging to the consuming task
void unobstructed_area_service_deinit(UnobstructedAreaState *state);

//! @internal
//! Returns the last unobstructed area
//! @param state Unobstructed area state belonging to the consuming task
//! @param area The GRect to write the unobstructed area to
void unobstructed_area_service_get_area(UnobstructedAreaState *state, GRect *area);

//! @internal
//! Subscribe to be notified when the app's unobstructed area changes.
//! @param state Unobstructed area state belonging to the consuming task
//! @param handlers The handlers that should be called when the unobstructed area changes.
//! @param context A user-provided context that will be passed to the callback handlers.
void unobstructed_area_service_subscribe(UnobstructedAreaState *state,
                                         const UnobstructedAreaHandlers *handlers,
                                         void *context);

//! @internal
//! @param state Unobstructed area state belonging to the consuming task
//! Unsubscribe from notifications about changes to the app's unobstructed area.
void unobstructed_area_service_unsubscribe(UnobstructedAreaState *state);