/*
 * 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.blocking;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.telephony.PhoneNumberUtils;
import android.text.TextUtils;
import android.view.View;
import android.widget.Toast;
import com.android.contacts.common.util.ContactDisplayUtils;
import com.android.dialer.blocking.FilteredNumberAsyncQueryHandler.OnBlockNumberListener;
import com.android.dialer.blocking.FilteredNumberAsyncQueryHandler.OnUnblockNumberListener;
import com.android.dialer.logging.InteractionEvent;
import com.android.dialer.logging.Logger;
import com.android.dialer.voicemailstatus.VisualVoicemailEnabledChecker;

/**
 * Fragment for confirming and enacting blocking/unblocking a number. Also invokes snackbar
 * providing undo functionality.
 */
public class BlockNumberDialogFragment extends DialogFragment {

  private static final String BLOCK_DIALOG_FRAGMENT = "BlockNumberDialog";
  private static final String ARG_BLOCK_ID = "argBlockId";
  private static final String ARG_NUMBER = "argNumber";
  private static final String ARG_COUNTRY_ISO = "argCountryIso";
  private static final String ARG_DISPLAY_NUMBER = "argDisplayNumber";
  private static final String ARG_PARENT_VIEW_ID = "parentViewId";
  private String mNumber;
  private String mDisplayNumber;
  private String mCountryIso;
  private FilteredNumberAsyncQueryHandler mHandler;
  private View mParentView;
  private VisualVoicemailEnabledChecker mVoicemailEnabledChecker;
  private Callback mCallback;

  public static BlockNumberDialogFragment show(
      Integer blockId,
      String number,
      String countryIso,
      String displayNumber,
      Integer parentViewId,
      FragmentManager fragmentManager,
      Callback callback) {
    final BlockNumberDialogFragment newFragment =
        BlockNumberDialogFragment.newInstance(
            blockId, number, countryIso, displayNumber, parentViewId);

    newFragment.setCallback(callback);
    newFragment.show(fragmentManager, BlockNumberDialogFragment.BLOCK_DIALOG_FRAGMENT);
    return newFragment;
  }

  private static BlockNumberDialogFragment newInstance(
      Integer blockId,
      String number,
      String countryIso,
      String displayNumber,
      Integer parentViewId) {
    final BlockNumberDialogFragment fragment = new BlockNumberDialogFragment();
    final Bundle args = new Bundle();
    if (blockId != null) {
      args.putInt(ARG_BLOCK_ID, blockId.intValue());
    }
    if (parentViewId != null) {
      args.putInt(ARG_PARENT_VIEW_ID, parentViewId.intValue());
    }
    args.putString(ARG_NUMBER, number);
    args.putString(ARG_COUNTRY_ISO, countryIso);
    args.putString(ARG_DISPLAY_NUMBER, displayNumber);
    fragment.setArguments(args);
    return fragment;
  }

  public void setFilteredNumberAsyncQueryHandlerForTesting(
      FilteredNumberAsyncQueryHandler handler) {
    mHandler = handler;
  }

  @Override
  public Context getContext() {
    return getActivity();
  }

  @Override
  public Dialog onCreateDialog(Bundle savedInstanceState) {
    super.onCreateDialog(savedInstanceState);
    final boolean isBlocked = getArguments().containsKey(ARG_BLOCK_ID);

    mNumber = getArguments().getString(ARG_NUMBER);
    mDisplayNumber = getArguments().getString(ARG_DISPLAY_NUMBER);
    mCountryIso = getArguments().getString(ARG_COUNTRY_ISO);

    if (TextUtils.isEmpty(mDisplayNumber)) {
      mDisplayNumber = mNumber;
    }

    mHandler = new FilteredNumberAsyncQueryHandler(getContext());
    mVoicemailEnabledChecker = new VisualVoicemailEnabledChecker(getActivity(), null);
    // Choose not to update VoicemailEnabledChecker, as checks should already been done in
    // all current use cases.
    mParentView = getActivity().findViewById(getArguments().getInt(ARG_PARENT_VIEW_ID));

    CharSequence title;
    String okText;
    String message;
    if (isBlocked) {
      title = null;
      okText = getString(R.string.unblock_number_ok);
      message =
          ContactDisplayUtils.getTtsSpannedPhoneNumber(
                  getResources(), R.string.unblock_number_confirmation_title, mDisplayNumber)
              .toString();
    } else {
      title =
          ContactDisplayUtils.getTtsSpannedPhoneNumber(
              getResources(), R.string.block_number_confirmation_title, mDisplayNumber);
      okText = getString(R.string.block_number_ok);
      if (FilteredNumberCompat.useNewFiltering(getContext())) {
        message = getString(R.string.block_number_confirmation_message_new_filtering);
      } else if (mVoicemailEnabledChecker.isVisualVoicemailEnabled()) {
        message = getString(R.string.block_number_confirmation_message_vvm);
      } else {
        message = getString(R.string.block_number_confirmation_message_no_vvm);
      }
    }

    AlertDialog.Builder builder =
        new AlertDialog.Builder(getActivity())
            .setTitle(title)
            .setMessage(message)
            .setPositiveButton(
                okText,
                new DialogInterface.OnClickListener() {
                  @Override
                  public void onClick(DialogInterface dialog, int id) {
                    if (isBlocked) {
                      unblockNumber();
                    } else {
                      blockNumber();
                    }
                  }
                })
            .setNegativeButton(android.R.string.cancel, null);
    return builder.create();
  }

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    String e164Number = PhoneNumberUtils.formatNumberToE164(mNumber, mCountryIso);
    if (!FilteredNumbersUtil.canBlockNumber(getContext(), e164Number, mNumber)) {
      dismiss();
      Toast.makeText(
              getContext(),
              ContactDisplayUtils.getTtsSpannedPhoneNumber(
                  getResources(), R.string.invalidNumber, mDisplayNumber),
              Toast.LENGTH_SHORT)
          .show();
    }
  }

  @Override
  public void onPause() {
    // Dismiss on rotation.
    dismiss();
    mCallback = null;

    super.onPause();
  }

  public void setCallback(Callback callback) {
    mCallback = callback;
  }

  private CharSequence getBlockedMessage() {
    return ContactDisplayUtils.getTtsSpannedPhoneNumber(
        getResources(), R.string.snackbar_number_blocked, mDisplayNumber);
  }

  private CharSequence getUnblockedMessage() {
    return ContactDisplayUtils.getTtsSpannedPhoneNumber(
        getResources(), R.string.snackbar_number_unblocked, mDisplayNumber);
  }

  private int getActionTextColor() {
    return getContext().getResources().getColor(R.color.dialer_snackbar_action_text_color);
  }

  private void blockNumber() {
    final CharSequence message = getBlockedMessage();
    final CharSequence undoMessage = getUnblockedMessage();
    final Callback callback = mCallback;
    final int actionTextColor = getActionTextColor();
    final Context applicationContext = getContext().getApplicationContext();

    final OnUnblockNumberListener onUndoListener =
        new OnUnblockNumberListener() {
          @Override
          public void onUnblockComplete(int rows, ContentValues values) {
            Snackbar.make(mParentView, undoMessage, Snackbar.LENGTH_LONG).show();
            if (callback != null) {
              callback.onChangeFilteredNumberUndo();
            }
          }
        };

    final OnBlockNumberListener onBlockNumberListener =
        new OnBlockNumberListener() {
          @Override
          public void onBlockComplete(final Uri uri) {
            final View.OnClickListener undoListener =
                new View.OnClickListener() {
                  @Override
                  public void onClick(View view) {
                    // Delete the newly created row on 'undo'.
                    Logger.get(applicationContext)
                        .logInteraction(InteractionEvent.Type.UNDO_BLOCK_NUMBER);
                    mHandler.unblock(onUndoListener, uri);
                  }
                };

            Snackbar.make(mParentView, message, Snackbar.LENGTH_LONG)
                .setAction(R.string.block_number_undo, undoListener)
                .setActionTextColor(actionTextColor)
                .show();

            if (callback != null) {
              callback.onFilterNumberSuccess();
            }

            if (FilteredNumbersUtil.hasRecentEmergencyCall(applicationContext)) {
              FilteredNumbersUtil.maybeNotifyCallBlockingDisabled(applicationContext);
            }
          }
        };

    mHandler.blockNumber(onBlockNumberListener, mNumber, mCountryIso);
  }

  private void unblockNumber() {
    final CharSequence message = getUnblockedMessage();
    final CharSequence undoMessage = getBlockedMessage();
    final Callback callback = mCallback;
    final int actionTextColor = getActionTextColor();
    final Context applicationContext = getContext().getApplicationContext();

    final OnBlockNumberListener onUndoListener =
        new OnBlockNumberListener() {
          @Override
          public void onBlockComplete(final Uri uri) {
            Snackbar.make(mParentView, undoMessage, Snackbar.LENGTH_LONG).show();
            if (callback != null) {
              callback.onChangeFilteredNumberUndo();
            }
          }
        };

    mHandler.unblock(
        new OnUnblockNumberListener() {
          @Override
          public void onUnblockComplete(int rows, final ContentValues values) {
            final View.OnClickListener undoListener =
                new View.OnClickListener() {
                  @Override
                  public void onClick(View view) {
                    // Re-insert the row on 'undo', with a new ID.
                    Logger.get(applicationContext)
                        .logInteraction(InteractionEvent.Type.UNDO_UNBLOCK_NUMBER);
                    mHandler.blockNumber(onUndoListener, values);
                  }
                };

            Snackbar.make(mParentView, message, Snackbar.LENGTH_LONG)
                .setAction(R.string.block_number_undo, undoListener)
                .setActionTextColor(actionTextColor)
                .show();

            if (callback != null) {
              callback.onUnfilterNumberSuccess();
            }
          }
        },
        getArguments().getInt(ARG_BLOCK_ID));
  }

  /**
   * Use a callback interface to update UI after success/undo. Favor this approach over other more
   * standard paradigms because of the variety of scenarios in which the DialogFragment can be
   * invoked (by an Activity, by a fragment, by an adapter, by an adapter list item). Because of
   * this, we do NOT support retaining state on rotation, and will dismiss the dialog upon rotation
   * instead.
   */
  public interface Callback {

    /** Called when a number is successfully added to the set of filtered numbers */
    void onFilterNumberSuccess();

    /** Called when a number is successfully removed from the set of filtered numbers */
    void onUnfilterNumberSuccess();

    /** Called when the action of filtering or unfiltering a number is undone */
    void onChangeFilteredNumberUndo();
  }
}