content: /*
   * Copyright 2019 ACINQ SAS
   *
   * 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 fr.acinq.eclair.wallet.fragments;
  
  import android.app.Dialog;
  import android.content.Context;
  import androidx.databinding.DataBindingUtil;
  import android.os.Handler;
  import android.preference.PreferenceManager;
  import android.text.Editable;
  import android.text.TextWatcher;
  import android.view.HapticFeedbackConstants;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.widget.Button;
  import com.google.common.base.Strings;
  import fr.acinq.eclair.wallet.R;
  import fr.acinq.eclair.wallet.databinding.DialogPinBinding;
  import fr.acinq.eclair.wallet.utils.Constants;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class PinDialog extends Dialog {
  
    private static final String PIN_PLACEHOLDER = "\u25CF";
    private DialogPinBinding mBinding;
    private String mPinValue = "";
    private PinDialogCallback mPinCallback;
  
    public PinDialog(final Context context, final int themeResId, final PinDialogCallback pinCallback) {
      this(context, themeResId, pinCallback, context.getString(R.string.pindialog_title_default));
    }
  
    public PinDialog(final Context context, final int themeResId, final PinDialogCallback pinCallback, final String title) {
      super(context, themeResId);
  
      mPinCallback = pinCallback;
      mBinding = DataBindingUtil.inflate(LayoutInflater.from(getContext()), R.layout.dialog_pin, null, false);
      setContentView(mBinding.getRoot());
      setOnCancelListener(dialogInterface -> mPinCallback.onPinCancel(PinDialog.this));
      mBinding.pinTitle.setText(title);
  
      final List<View> mButtonsList = new ArrayList<>();
      mButtonsList.add(mBinding.pinNum1);
      mButtonsList.add(mBinding.pinNum2);
      mButtonsList.add(mBinding.pinNum3);
      mButtonsList.add(mBinding.pinNum4);
      mButtonsList.add(mBinding.pinNum5);
      mButtonsList.add(mBinding.pinNum6);
      mButtonsList.add(mBinding.pinNum7);
      mButtonsList.add(mBinding.pinNum8);
      mButtonsList.add(mBinding.pinNum9);
      mButtonsList.add(mBinding.pinNum0);
  
      mBinding.pinDisplay.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
          if (s != null && s.length() == Constants.PIN_LENGTH) {
            // automatically confirm pin when pin is 6 chars long
            new Handler().postDelayed(() -> mPinCallback.onPinConfirm(PinDialog.this, mPinValue), 300);
          }
        }
        @Override
        public void afterTextChanged(Editable s) {}
      });
  
      for (View v : mButtonsList) {
        v.setOnClickListener(view -> {
          if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(Constants.SETTING_HAPTIC_FEEDBACK, true)) {
            view.setHapticFeedbackEnabled(true);
            view.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY, HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
          }
          if (mPinValue == null) mPinValue = "";
          if (mPinValue.equals("") || mPinValue.length() != Constants.PIN_LENGTH) {
            final String val = ((Button) view).getText().toString();
            mPinValue = mPinValue.concat(val);
            mBinding.pinDisplay.setText(Strings.repeat(PIN_PLACEHOLDER, mPinValue.length()));
          }
        });
      }
  
      mBinding.pinNumClear.setOnClickListener(view -> {
        mPinValue = "";
        mBinding.pinDisplay.setText("");
      });
  
      mBinding.pinBackspace.setOnClickListener(view -> {
        if (mPinValue != null && mPinValue.length() > 0) {
          mPinValue = mPinValue.substring(0, mPinValue.length() - 1);
          mBinding.pinDisplay.setText(Strings.repeat(PIN_PLACEHOLDER, mPinValue.length()));
        }
      });
    }
  
    public void reset() {
      this.mPinValue = "";
      this.mBinding.pinDisplay.setText("");
    }
  
    public void animateSuccess() {
      this.dismiss();
    }
  
    public void animateFailure() {
      this.dismiss();
    }
  
    public interface PinDialogCallback {
      void onPinConfirm(final PinDialog dialog, final String pinValue);
  
      void onPinCancel(final PinDialog dialog);
    }
  }
  