/*
 * Copyright 2013-2015 µg Project Team
 *
 * 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.
 */

package org.microg.nlp.geocode;

import android.content.Context;
import android.location.Address;
import android.location.GeocoderParams;

import com.android.location.provider.GeocodeProvider;

import java.util.List;

class GeocodeProviderV1 extends GeocodeProvider implements org.microg.nlp.geocode.GeocodeProvider {
    private final BackendFuser backendFuser;

    public GeocodeProviderV1(Context context) {
        backendFuser = new BackendFuser(context);
        backendFuser.bind();
    }

    @Override
    public String onGetFromLocation(double latitude, double longitude, int maxResults,
                                    GeocoderParams params, List<Address> addresses) {
        List<Address> fuserResult = backendFuser
                .getFromLocation(latitude, longitude, maxResults, params.getLocale().toString());
        return handleResult(addresses, fuserResult);
    }

    @Override
    public String onGetFromLocationName(String locationName, double lowerLeftLatitude,
                                        double lowerLeftLongitude, double upperRightLatitude,
                                        double upperRightLongitude, int maxResults,
                                        GeocoderParams params, List<Address> addresses) {
        List<Address> fuserResult = backendFuser.getFromLocationName(locationName, maxResults,
                lowerLeftLatitude, lowerLeftLongitude, upperRightLatitude, upperRightLongitude,
                params.getLocale().toString());
        return handleResult(addresses, fuserResult);
    }

    private String handleResult(List<Address> realResult, List<Address> fuserResult) {
        if (fuserResult == null) {
            return "no backend";
        } else if (fuserResult.isEmpty()) {
            return "no result";
        } else {
            realResult.addAll(fuserResult);
            return null;
        }
    }

    @Override
    public void reload() {
        backendFuser.unbind();
        backendFuser.reset();
        backendFuser.bind();
    }

    @Override
    public void destroy() {
        backendFuser.unbind();
    }
}