/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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 com.android.dialer.app.filterednumber;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import com.android.dialer.app.R;
import com.android.dialer.app.list.BlockedListSearchFragment;
import com.android.dialer.app.list.SearchFragment;
import com.android.dialer.logging.Logger;
import com.android.dialer.logging.ScreenEvent;

public class BlockedNumbersSettingsActivity extends AppCompatActivity
    implements SearchFragment.HostInterface {

  private static final String TAG_BLOCKED_MANAGEMENT_FRAGMENT = "blocked_management";
  private static final String TAG_BLOCKED_SEARCH_FRAGMENT = "blocked_search";
  private static final String TAG_VIEW_NUMBERS_TO_IMPORT_FRAGMENT = "view_numbers_to_import";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.blocked_numbers_activity);

    // If savedInstanceState != null, the Activity will automatically restore the last fragment.
    if (savedInstanceState == null) {
      showManagementUi();
    }
  }

  /** Shows fragment with the list of currently blocked numbers and settings related to blocking. */
  public void showManagementUi() {
    BlockedNumbersFragment fragment =
        (BlockedNumbersFragment)
            getFragmentManager().findFragmentByTag(TAG_BLOCKED_MANAGEMENT_FRAGMENT);
    if (fragment == null) {
      fragment = new BlockedNumbersFragment();
    }

    getFragmentManager()
        .beginTransaction()
        .replace(R.id.blocked_numbers_activity_container, fragment, TAG_BLOCKED_MANAGEMENT_FRAGMENT)
        .commit();

    Logger.get(this).logScreenView(ScreenEvent.Type.BLOCKED_NUMBER_MANAGEMENT, this);
  }

  /** Shows fragment with search UI for browsing/finding numbers to block. */
  public void showSearchUi() {
    BlockedListSearchFragment fragment =
        (BlockedListSearchFragment)
            getFragmentManager().findFragmentByTag(TAG_BLOCKED_SEARCH_FRAGMENT);
    if (fragment == null) {
      fragment = new BlockedListSearchFragment();
      fragment.setHasOptionsMenu(false);
      fragment.setShowEmptyListForNullQuery(true);
      fragment.setDirectorySearchEnabled(false);
    }

    getFragmentManager()
        .beginTransaction()
        .replace(R.id.blocked_numbers_activity_container, fragment, TAG_BLOCKED_SEARCH_FRAGMENT)
        .addToBackStack(null)
        .commit();

    Logger.get(this).logScreenView(ScreenEvent.Type.BLOCKED_NUMBER_ADD_NUMBER, this);
  }

  /**
   * Shows fragment with UI to preview the numbers of contacts currently marked as send-to-voicemail
   * in Contacts. These numbers can be imported into Dialer's blocked number list.
   */
  public void showNumbersToImportPreviewUi() {
    ViewNumbersToImportFragment fragment =
        (ViewNumbersToImportFragment)
            getFragmentManager().findFragmentByTag(TAG_VIEW_NUMBERS_TO_IMPORT_FRAGMENT);
    if (fragment == null) {
      fragment = new ViewNumbersToImportFragment();
    }

    getFragmentManager()
        .beginTransaction()
        .replace(
            R.id.blocked_numbers_activity_container, fragment, TAG_VIEW_NUMBERS_TO_IMPORT_FRAGMENT)
        .addToBackStack(null)
        .commit();
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
      onBackPressed();
      return true;
    }
    return false;
  }

  @Override
  public void onBackPressed() {
    // TODO: Achieve back navigation without overriding onBackPressed.
    if (getFragmentManager().getBackStackEntryCount() > 0) {
      getFragmentManager().popBackStack();
    } else {
      super.onBackPressed();
    }
  }

  @Override
  public boolean isActionBarShowing() {
    return false;
  }

  @Override
  public boolean isDialpadShown() {
    return false;
  }

  @Override
  public int getDialpadHeight() {
    return 0;
  }

  @Override
  public int getActionBarHeight() {
    return 0;
  }
}