/*
 * Copyright (C) 2011 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.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Typeface;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.AppCompatRadioButton;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RelativeLayout;

import org.javarosa.core.model.SelectChoice;
import org.javarosa.core.model.data.IAnswerData;
import org.javarosa.core.model.data.SelectOneData;
import org.javarosa.core.model.data.helper.Selection;
import org.javarosa.form.api.FormEntryCaption;
import org.javarosa.form.api.FormEntryPrompt;
import org.javarosa.xpath.expr.XPathFuncExpr;
import org.odk.collect.android.R;
import org.odk.collect.android.application.Collect;
import org.odk.collect.android.external.ExternalDataUtil;
import org.odk.collect.android.external.ExternalSelectChoice;
import org.odk.collect.android.listeners.AdvanceToNextListener;
import org.odk.collect.android.views.MediaLayout;

import java.util.ArrayList;
import java.util.Vector;

/**
 * SelectOneWidgets handles select-one fields using radio buttons. Unlike the classic SelectOneWidget, when a user
 * clicks an option they are then immediately advanced to the next question.
 *
 * @author Jeff Beorse (jeff@beorse.net)
 */
public class SelectOneAutoAdvanceWidget extends QuestionWidget implements OnCheckedChangeListener {
  Vector<SelectChoice> mItems; // may take a while to compute
  ArrayList<RadioButton> buttons;
  AdvanceToNextListener listener;


  public SelectOneAutoAdvanceWidget(Context context, FormEntryPrompt prompt) {
    super(context, prompt);

    LayoutInflater inflater = LayoutInflater.from(getContext());

    // SurveyCTO-added support for dynamic select content (from .csv files)
    XPathFuncExpr xPathFuncExpr = ExternalDataUtil.getSearchXPathExpression(prompt.getAppearanceHint());
    if (xPathFuncExpr != null) {
      mItems = ExternalDataUtil.populateExternalChoices(prompt, xPathFuncExpr);
    } else {
      mItems = prompt.getSelectChoices();
    }

    buttons = new ArrayList<>();
    listener = (AdvanceToNextListener) context;

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

    // use this for recycle
    Bitmap b = BitmapFactory.decodeResource(getContext().getResources(),
        R.drawable.expander_ic_right);

    if (mItems != null) {
      final int itemCount = mItems.size();
      for (int i = 0; i < itemCount; i++) {

        RelativeLayout thisParentLayout =
            (RelativeLayout) inflater.inflate(R.layout.quick_select_layout, this, false);

        LinearLayout questionLayout = (LinearLayout) thisParentLayout.getChildAt(0);
        ImageView rightArrow = (ImageView) thisParentLayout.getChildAt(1);

        AppCompatRadioButton r = new AppCompatRadioButton(getContext());
        r.setText(prompt.getSelectChoiceText(mItems.get(i)));
        r.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimension(R.dimen.answer_text));
        r.setTag(Integer.valueOf(i));
        r.setId(QuestionWidget.newUniqueId());
        r.setEnabled(!prompt.isReadOnly());
        r.setFocusable(!prompt.isReadOnly());
        r.setTypeface(null, Typeface.NORMAL);
        r.setTextColor(ContextCompat.getColor(context, R.color.primary_text));

        rightArrow.setImageBitmap(b);
        //rightArrow.setColorFilter(ContextCompat.getColor(context, R.color.highlight), PorterDuff.Mode.SRC_IN);
        // Hide the arrow for read only screens
        if (prompt.isReadOnly()) {
          rightArrow.setVisibility(View.GONE);
        }

        buttons.add(r);

        if (mItems.get(i).getValue().equals(s)) {
          r.setChecked(true);
        }

        r.setOnCheckedChangeListener(this);

        String audioURI = null;
        audioURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), FormEntryCaption.TEXT_FORM_AUDIO);

        String imageURI;
        if (mItems.get(i) instanceof ExternalSelectChoice) {
          imageURI = ((ExternalSelectChoice) mItems.get(i)).getImage();
        } else {
          imageURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), FormEntryCaption.TEXT_FORM_IMAGE);
        }

        String videoURI = null;
        videoURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), "video");

        String bigImageURI = null;
        bigImageURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), "big-image");

        MediaLayout mediaLayout = new MediaLayout(getContext());
        mediaLayout.setAVT(prompt.getIndex(), "", r, audioURI, imageURI, videoURI, bigImageURI);
        questionLayout.addView(mediaLayout);
        addView(thisParentLayout);
      }
    }
  }


  @Override
  public void clearAnswer() {
    for (RadioButton button : this.buttons) {
      if (button.isChecked()) {
        button.setChecked(false);
        return;
      }
    }
  }


  @Override
  public IAnswerData getAnswer() {
    int i = getCheckedId();
    if (i == -1) {
      return null;
    } else {
      SelectChoice sc = mItems.elementAt(i);
      return new SelectOneData(new Selection(sc));
    }
  }


  @Override
  public void setFocus(Context context) {
    // Hide the soft keyboard if it's showing.
    InputMethodManager inputManager =
        (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputManager.hideSoftInputFromWindow(this.getWindowToken(), 0);
  }


  public int getCheckedId() {
    for (int i = 0; i < buttons.size(); ++i) {
      RadioButton button = buttons.get(i);
      if (button.isChecked()) {
        return i;
      }
    }
    return -1;
  }


  @Override
  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if (!buttonView.isPressed()) {
      return;
    }
    if (!isChecked) {
      // If it got unchecked, we don't care.
      return;
    }

    for (RadioButton button : this.buttons) {
      if (button.isChecked() && !(buttonView == button)) {
        button.setChecked(false);
      }
    }
    Collect.getInstance().getActivityLogger().logInstanceAction(this, "onCheckedChanged",
        mItems.get((Integer) buttonView.getTag()).getValue(), mPrompt.getIndex());

    listener.advance();
  }


  @Override
  public void setOnLongClickListener(OnLongClickListener l) {
    for (RadioButton r : buttons) {
      r.setOnLongClickListener(l);
    }
  }


  @Override
  public void cancelLongPress() {
    super.cancelLongPress();
    for (RadioButton r : buttons) {
      r.cancelLongPress();
    }
  }

}
