/*
 * Copyright (C) 2009 University of Washington
 * 
 * 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 org.odk.collect.android.widgets;

import android.content.Context;
import android.text.InputType;
import android.text.method.DigitsKeyListener;

import org.javarosa.core.model.data.IAnswerData;
import org.javarosa.core.model.data.StringData;
import org.javarosa.form.api.FormEntryPrompt;

/**
 * Widget that restricts values to integers.
 *
 * @author Carl Hartung (carlhartung@gmail.com)
 */
public class StringNumberWidget extends StringWidget {

  public StringNumberWidget(Context context, FormEntryPrompt prompt, boolean readOnlyOverride) {
    super(context, prompt, readOnlyOverride, true);

    mAnswer.setInputType(InputType.TYPE_NUMBER_FLAG_SIGNED);

    // needed to make long readonly text scroll
    mAnswer.setHorizontallyScrolling(false);
    final String appearence = prompt.getAppearanceHint();
    if (appearence == null || appearence.trim().isEmpty() || !appearence.equals("multiline")) {
      mAnswer.setSingleLine(true);
    } else {
      mAnswer.setSingleLine(false);
    }

    mAnswer.setKeyListener(new DigitsKeyListener() {
      @Override
      protected char[] getAcceptedChars() {
        return new char[]{
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '-', '+', ' ', ','
        };
      }
    });

    if (prompt.isReadOnly()) {
      setBackgroundDrawable(null);
      setFocusable(false);
      setClickable(false);
    }

    String s = null;
    if (prompt.getAnswerValue() != null) {
      s = (String) prompt.getAnswerValue().getValue();
    }

    if (s != null) {
      mAnswer.setText(s);
    }

    setupChangeListener();
  }


  @Override
  public IAnswerData getAnswer() {
    clearFocus();
    String s = mAnswer.getText().toString();
    if (s == null || s.equals("")) {
      return null;
    } else {
      try {
        return new StringData(s);
      } catch (Exception NumberFormatException) {
        return null;
      }
    }
  }

}
