/*
 * Copyright (C) 2013 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.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore.Images;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TableLayout;
import android.widget.TextView;
import android.widget.Toast;

import org.javarosa.core.model.data.IAnswerData;
import org.javarosa.core.model.data.StringData;
import org.javarosa.form.api.FormEntryPrompt;
import org.odk.collect.android.R;
import org.odk.collect.android.activities.FormEntryActivity;
import org.odk.collect.android.application.Collect;
import org.odk.collect.android.utilities.FileUtils;
import org.odk.collect.android.utilities.MediaUtils;
import org.odk.collect.android.views.ButtonBuilder;

import java.io.File;

/**
 * Widget that allows user to invoke the aligned-image camera to take pictures and add them to the form. Modified to
 * launch the Aligned-image camera app.
 *
 * @author Carl Hartung (carlhartung@gmail.com)
 * @author Yaw Anokwa (yanokwa@gmail.com)
 * @author mitchellsundt@gmail.com
 * @author Mitchell Tyler Lee
 */
public class AlignedImageWidget extends QuestionWidget implements IBinaryWidget {
  private static final String ODK_CAMERA_TAKE_PICTURE_INTENT_COMPONENT = "org.opendatakit.camera.TakePicture";

  private static final String ODK_CAMERA_INTENT_PACKAGE = "org.opendatakit.camera";

  private static final String RETAKE_OPTION_EXTRA = "retakeOption";

  private static final String DIMENSIONS_EXTRA = "dimensions";

  private static final String FILE_PATH_EXTRA = "filePath";

  private final static String t = "AlignedImageWidget";

  private Button mCaptureButton;
  private Button mChooseButton;
  private ImageView mImageView;

  private String mBinaryName;

  private String mInstanceFolder;

  private TextView mErrorTextView;

  private int iArray[] = new int[6];

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

    String appearance = prompt.getAppearanceHint();
    String alignments = appearance.substring(appearance.indexOf(":") + 1);
    String[] splits = alignments.split(" ");
    if (splits.length != 6) {
      Log.w(t, "Only have " + splits.length + " alignment values");
    }
    for (int i = 0; i < 6; ++i) {
      if (splits.length < i) {
        iArray[i] = 0;
      } else {
        iArray[i] = Integer.valueOf(splits[i]);
      }
    }

    mInstanceFolder =
        Collect.getInstance().getFormController().getInstancePath().getParent();

    setOrientation(LinearLayout.VERTICAL);

    TableLayout.LayoutParams params = new TableLayout.LayoutParams();
    params.setMargins(7, 5, 7, 5);

    mErrorTextView = new TextView(context);
    mErrorTextView.setId(QuestionWidget.newUniqueId());
    mErrorTextView.setText("Selected file is not a valid image");

    // setup capture button
    final ButtonBuilder captureeButtonBuilder = new ButtonBuilder(context);
    captureeButtonBuilder.withParent(this);
    captureeButtonBuilder.readOnly(prompt.isReadOnly());
    mCaptureButton = captureeButtonBuilder.buildCaptureImageButton();
    mCaptureButton.setLayoutParams(params);

    // launch capture intent on click
    mCaptureButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Collect.getInstance().getActivityLogger().logInstanceAction(this, "captureButton",
            "click", mPrompt.getIndex());
        mErrorTextView.setVisibility(View.GONE);

        Intent i = new Intent();
        i.setComponent(new ComponentName(ODK_CAMERA_INTENT_PACKAGE,
            ODK_CAMERA_TAKE_PICTURE_INTENT_COMPONENT));
        i.putExtra(FILE_PATH_EXTRA, Collect.CACHE_PATH);
        i.putExtra(DIMENSIONS_EXTRA, iArray);
        i.putExtra(RETAKE_OPTION_EXTRA, false);

        // We give the camera an absolute filename/path where to put the
        // picture because of bug:
        // http://code.google.com/p/android/issues/detail?id=1480
        // The bug appears to be fixed in Android 2.0+, but as of feb 2,
        // 2010, G1 phones only run 1.6. Without specifying the path the
        // images returned by the camera in 1.6 (and earlier) are ~1/4
        // the size. boo.

        // if this gets modified, the onActivityResult in
        // FormEntyActivity will also need to be updated.
        try {
          Collect.getInstance().getFormController().setIndexWaitingForData(mPrompt.getIndex());
          ((Activity) getContext()).startActivityForResult(i, FormEntryActivity.ALIGNED_IMAGE);
        } catch (ActivityNotFoundException e) {
          Toast.makeText(getContext(),
              getContext().getString(R.string.activity_not_found, "aligned image capture"),
              Toast.LENGTH_SHORT).show();
          Collect.getInstance().getFormController().setIndexWaitingForData(null);
        }

      }
    });

    // setup chooser button
    final ButtonBuilder chooseButtonBuilder = new ButtonBuilder(context);
    chooseButtonBuilder.withTextResource(R.string.choose_image);
    chooseButtonBuilder.withParent(this);
    chooseButtonBuilder.readOnly(prompt.isReadOnly());
    mChooseButton = chooseButtonBuilder.build();
    mChooseButton.setLayoutParams(params);

    // launch capture intent on click
    mChooseButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Collect.getInstance().getActivityLogger().logInstanceAction(this, "chooseButton",
            "click", mPrompt.getIndex());
        mErrorTextView.setVisibility(View.GONE);
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.setType("image/*");

        try {
          Collect.getInstance().getFormController()
              .setIndexWaitingForData(mPrompt.getIndex());
          ((Activity) getContext()).startActivityForResult(i,
              FormEntryActivity.IMAGE_CHOOSER);
        } catch (ActivityNotFoundException e) {
          Toast.makeText(getContext(),
              getContext().getString(R.string.activity_not_found, "choose image"),
              Toast.LENGTH_SHORT).show();
          Collect.getInstance().getFormController().setIndexWaitingForData(null);
        }

      }
    });

    // finish complex layout
    addView(mCaptureButton);
    addView(mChooseButton);
    addView(mErrorTextView);

    // and hide the capture and choose button if read-only
    if (prompt.isReadOnly()) {
      mCaptureButton.setVisibility(View.GONE);
      mChooseButton.setVisibility(View.GONE);
    }
    mErrorTextView.setVisibility(View.GONE);

    // retrieve answer from data model and update ui
    mBinaryName = prompt.getAnswerText();

    // Only add the imageView if the user has taken a picture
    if (mBinaryName != null) {
      mImageView = new ImageView(getContext());
      mImageView.setId(QuestionWidget.newUniqueId());
      Display display =
          ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
              .getDefaultDisplay();
      int screenWidth = display.getWidth();
      int screenHeight = display.getHeight();

      File f = new File(mInstanceFolder + File.separator + mBinaryName);

      if (f.exists()) {
        Bitmap bmp = FileUtils.getBitmapScaledToDisplay(f, screenHeight, screenWidth);
        if (bmp == null) {
          mErrorTextView.setVisibility(View.VISIBLE);
        }
        mImageView.setImageBitmap(bmp);
      } else {
        mImageView.setImageBitmap(null);
      }

      mImageView.setPadding(10, 10, 10, 10);
      mImageView.setAdjustViewBounds(true);
      mImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          Collect.getInstance().getActivityLogger().logInstanceAction(this, "viewButton",
              "click", mPrompt.getIndex());
          Intent i = new Intent("android.intent.action.VIEW");
          Uri uri = MediaUtils.getImageUriFromMediaProvider(mInstanceFolder + File.separator + mBinaryName);
          if (uri != null) {
            Log.i(t, "setting view path to: " + uri);
            i.setDataAndType(uri, "image/*");
            try {
              getContext().startActivity(i);
            } catch (ActivityNotFoundException e) {
              Toast.makeText(getContext(),
                  getContext().getString(R.string.activity_not_found, "view image"),
                  Toast.LENGTH_SHORT).show();
            }
          }
        }
      });

      addView(mImageView);
    }
  }


  private void deleteMedia() {
    // get the file path and delete the file
    String name = mBinaryName;
    // clean up variables
    mBinaryName = null;
    // delete from media provider
    int del = MediaUtils.deleteImageFileFromMediaProvider(mInstanceFolder + File.separator + name);
    Log.i(t, "Deleted " + del + " rows from media content provider");
  }


  @Override
  public void clearAnswer() {
    // remove the file
    deleteMedia();
    mImageView.setImageBitmap(null);
    mErrorTextView.setVisibility(View.GONE);

    // reset buttons
    mCaptureButton.setText(getContext().getString(R.string.capture_image));
  }


  @Override
  public IAnswerData getAnswer() {
    if (mBinaryName != null) {
      return new StringData(mBinaryName.toString());
    } else {
      return null;
    }
  }


  @Override
  public void setBinaryData(Object newImageObj) {
    // you are replacing an answer. delete the previous image using the
    // content provider.
    if (mBinaryName != null) {
      deleteMedia();
    }

    File newImage = (File) newImageObj;
    if (newImage.exists()) {
      // Add the new image to the Media content provider so that the
      // viewing is fast in Android 2.0+
      ContentValues values = new ContentValues(6);
      values.put(Images.Media.TITLE, newImage.getName());
      values.put(Images.Media.DISPLAY_NAME, newImage.getName());
      values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis());
      values.put(Images.Media.MIME_TYPE, "image/jpeg");
      values.put(Images.Media.DATA, newImage.getAbsolutePath());

      Uri imageURI = getContext().getContentResolver().insert(
          Images.Media.EXTERNAL_CONTENT_URI, values);
      Log.i(t, "Inserting image returned uri = " + imageURI.toString());

      mBinaryName = newImage.getName();
      Log.i(t, "Setting current answer to " + newImage.getName());
    } else {
      Log.e(t, "NO IMAGE EXISTS at: " + newImage.getAbsolutePath());
    }

    Collect.getInstance().getFormController().setIndexWaitingForData(null);
  }

  @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);
  }


  @Override
  public boolean isWaitingForBinaryData() {
    return mPrompt.getIndex().equals(Collect.getInstance().getFormController().getIndexWaitingForData());
  }


  @Override
  public void cancelWaitingForBinaryData() {
    Collect.getInstance().getFormController().setIndexWaitingForData(null);
  }


  @Override
  public void setOnLongClickListener(OnLongClickListener l) {
    mCaptureButton.setOnLongClickListener(l);
    mChooseButton.setOnLongClickListener(l);
    if (mImageView != null) {
      mImageView.setOnLongClickListener(l);
    }
  }


  @Override
  public void cancelLongPress() {
    super.cancelLongPress();
    mCaptureButton.cancelLongPress();
    mChooseButton.cancelLongPress();
    if (mImageView != null) {
      mImageView.cancelLongPress();
    }
  }

}
