/*
 * 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.
 */

#include "ble_central.h"

#include "process_state/app_state/app_state.h"

#include "comm/ble/gap_le_connect.h"

static BTErrno prv_bt_errno_for_event(const PebbleBLEConnectionEvent *e) {
  if (e->connected) {
    return BTErrnoConnected;
  }

  // FIXME: PBL-35506 We need to re-evaluate what error code to actually use here
  return e->hci_reason;
}

void ble_central_handle_event(PebbleEvent *e) {
  BLEAppState *ble_app_state = app_state_get_ble_app_state();
  if (!ble_app_state->connection_handler) {
    return;
  }
  const PebbleBLEConnectionEvent *conn_event = &e->bluetooth.le.connection;
  const BTDeviceInternal device = PebbleEventToBTDeviceInternal(conn_event);
  ble_app_state->connection_handler(device.opaque,
                                    prv_bt_errno_for_event(conn_event));
}

BTErrno ble_central_set_connection_handler(BLEConnectionHandler handler) {
  BLEAppState *ble_app_state = app_state_get_ble_app_state();
  const bool is_subscribed = (ble_app_state->connection_handler != NULL);
  ble_app_state->connection_handler = handler;
  if (handler) {
    if (!is_subscribed) {
      event_service_client_subscribe(&ble_app_state->connection_service_info);
    }
  } else {
    if (is_subscribed) {
      event_service_client_unsubscribe(&ble_app_state->connection_service_info);
    }
  }
  return BTErrnoOK;
}