/*
 * Copyright (C) 2018 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.main.impl;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.content.LocalBroadcastManager;
import com.android.dialer.blockreportspam.ShowBlockReportSpamDialogReceiver;
import com.android.dialer.calllog.CallLogComponent;
import com.android.dialer.calllog.ui.NewCallLogFragment;
import com.android.dialer.common.concurrent.DefaultFutureCallback;
import com.android.dialer.main.MainActivityPeer;
import com.android.dialer.main.impl.bottomnav.BottomNavBar;
import com.android.dialer.main.impl.bottomnav.BottomNavBar.OnBottomNavTabSelectedListener;
import com.android.dialer.main.impl.bottomnav.BottomNavBar.TabIndex;
import com.android.dialer.voicemail.listui.NewVoicemailFragment;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.MoreExecutors;

/** MainActivityPeer that implements the new fragments. */
public class NewMainActivityPeer implements MainActivityPeer {

  private final MainActivity mainActivity;
  private final ShowBlockReportSpamDialogReceiver showBlockReportSpamDialogReceiver;

  public NewMainActivityPeer(MainActivity mainActivity) {
    this.mainActivity = mainActivity;
    this.showBlockReportSpamDialogReceiver =
        new ShowBlockReportSpamDialogReceiver(mainActivity.getFragmentManager());
  }

  @Override
  public void onActivityCreate(Bundle saveInstanceState) {
    mainActivity.setContentView(R.layout.main_activity);
    MainBottomNavBarBottomNavTabListener bottomNavBarBottomNavTabListener =
        new MainBottomNavBarBottomNavTabListener(
            mainActivity.getSupportFragmentManager(), mainActivity.getApplicationContext());
    BottomNavBar bottomNav = mainActivity.findViewById(R.id.bottom_nav_bar);
    bottomNav.addOnTabSelectedListener(bottomNavBarBottomNavTabListener);
    bottomNav.selectTab(TabIndex.SPEED_DIAL);
  }

  @Override
  public void onActivityResume() {
    LocalBroadcastManager.getInstance(mainActivity)
        .registerReceiver(
            showBlockReportSpamDialogReceiver, ShowBlockReportSpamDialogReceiver.getIntentFilter());
  }

  @Override
  public void onUserLeaveHint() {}

  @Override
  public void onActivityPause() {
    LocalBroadcastManager.getInstance(mainActivity)
        .unregisterReceiver(showBlockReportSpamDialogReceiver);
  }

  @Override
  public void onActivityStop() {}

  @Override
  public void onActivityDestroyed() {}

  @Override
  public void onNewIntent(Intent intent) {}

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {}

  @Override
  public void onSaveInstanceState(Bundle bundle) {}

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

  /**
   * Implementation of {@link OnBottomNavTabSelectedListener} that handles logic for showing each of
   * the main tabs.
   */
  private static final class MainBottomNavBarBottomNavTabListener
      implements OnBottomNavTabSelectedListener {

    private static final String CALL_LOG_TAG = "call_log";
    private static final String VOICEMAIL_TAG = "voicemail";

    private final FragmentManager supportFragmentManager;
    private final Context appContext;

    private MainBottomNavBarBottomNavTabListener(
        FragmentManager supportFragmentManager, Context appContext) {
      this.supportFragmentManager = supportFragmentManager;
      this.appContext = appContext;
    }

    @Override
    public void onSpeedDialSelected() {
      hideAllFragments();
      // TODO(calderwoodra): Implement SpeedDialFragment when FragmentUtils#getParent works
    }

    @Override
    public void onCallLogSelected() {
      hideAllFragments();
      NewCallLogFragment fragment =
          (NewCallLogFragment) supportFragmentManager.findFragmentByTag(CALL_LOG_TAG);
      if (fragment == null) {
        supportFragmentManager
            .beginTransaction()
            .add(R.id.fragment_container, new NewCallLogFragment(), CALL_LOG_TAG)
            .commit();
      } else {
        supportFragmentManager.beginTransaction().show(fragment).commit();
      }
    }

    @Override
    public void onContactsSelected() {
      hideAllFragments();
      // TODO(calderwoodra): Implement ContactsFragment when FragmentUtils#getParent works
    }

    @Override
    public void onVoicemailSelected() {
      hideAllFragments();
      NewVoicemailFragment fragment =
          (NewVoicemailFragment) supportFragmentManager.findFragmentByTag(VOICEMAIL_TAG);
      if (fragment == null) {
        supportFragmentManager
            .beginTransaction()
            .add(R.id.fragment_container, new NewVoicemailFragment(), VOICEMAIL_TAG)
            .commit();
      } else {
        supportFragmentManager.beginTransaction().show(fragment).commit();
      }
    }

    private void hideAllFragments() {
      FragmentTransaction supportTransaction = supportFragmentManager.beginTransaction();
      Fragment callLogFragment = supportFragmentManager.findFragmentByTag(CALL_LOG_TAG);
      if (callLogFragment != null) {
        if (callLogFragment.isVisible()) {
          // If the user taps any bottom nav button and the call log is showing, immediately cancel
          // missed calls (unbold them and clear their notifications).
          Futures.addCallback(
              // TODO(zachh): Use dagger to create Peer and MainBottomNavBarBottomNavTabListener.
              CallLogComponent.get(appContext).getClearMissedCalls().clearAll(),
              new DefaultFutureCallback<>(),
              MoreExecutors.directExecutor());
        }
        supportTransaction.hide(callLogFragment);
      }
      if (supportFragmentManager.findFragmentByTag(VOICEMAIL_TAG) != null) {
        supportTransaction.hide(supportFragmentManager.findFragmentByTag(VOICEMAIL_TAG));
      }
      supportTransaction.commit();
    }
  }
}