/*
 * Copyright 2020 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
 *
 *      https://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 com.google.android.apps.exposurenotification.roaming;

import android.content.Context;
import com.google.android.apps.exposurenotification.R;
import com.google.android.apps.exposurenotification.roaming.Qualifiers.HomeCountry;
import dagger.Module;
import dagger.Provides;
import dagger.hilt.InstallIn;
import dagger.hilt.android.qualifiers.ApplicationContext;
import dagger.hilt.components.SingletonComponent;

@Module
@InstallIn(SingletonComponent.class)
public class HomeCountryModule {

  @Provides
  @HomeCountry
  public String provideHomeCountryCode(@ApplicationContext Context context) {
    // Sometimes the regionIdentifier is smaller than a country (e.g. a US state), specified in the
    // form "US-CA".
    String region = context.getString(R.string.enx_regionIdentifier);
    if (region.length() < 2) {
      throw new RuntimeException("Failed to determine user's home region from configuration.");
    }
    return context.getString(R.string.enx_regionIdentifier).substring(0, 2);
  }
}
