/*
 * 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.activities;

import android.app.Activity;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v7.app.AlertDialog;

import org.odk.collect.android.R;
import org.odk.collect.android.provider.FormsProviderAPI.FormsColumns;

import java.util.ArrayList;

/**
 * Allows the user to create desktop shortcuts to any form currently avaiable to Collect
 *
 * @author ctsims
 * @author carlhartung (modified for ODK)
 */
public class AndroidShortcuts extends Activity {

  private Uri[] mCommands;
  private String[] mNames;


  @Override
  public void onCreate(Bundle bundle) {
    super.onCreate(bundle);

    final Intent intent = getIntent();
    final String action = intent.getAction();

    // The Android needs to know what shortcuts are available, generate the list
    if (Intent.ACTION_CREATE_SHORTCUT.equals(action)) {
      buildMenuList();
    }
  }


  /**
   * Builds a list of shortcuts
   */
  private void buildMenuList() {
    ArrayList<String> names = new ArrayList<>();
    ArrayList<Uri> commands = new ArrayList<>();

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Select ODK Shortcut");

    Cursor c = null;
    try {
      c = getContentResolver().query(FormsColumns.CONTENT_URI, null, null, null, null);

      if (c.getCount() > 0) {
        c.moveToPosition(-1);
        while (c.moveToNext()) {
          String formName = c.getString(c.getColumnIndex(FormsColumns.DISPLAY_NAME));
          names.add(formName);
          Uri uri =
              Uri.withAppendedPath(FormsColumns.CONTENT_URI,
                  c.getString(c.getColumnIndex(FormsColumns._ID)));
          commands.add(uri);
        }
      }
    } finally {
      if (c != null) {
        c.close();
      }
    }

    mNames = names.toArray(new String[0]);
    mCommands = commands.toArray(new Uri[0]);

    builder.setItems(this.mNames, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int item) {
        returnShortcut(mNames[item], mCommands[item]);
      }
    });

    builder.setOnCancelListener(new OnCancelListener() {
      public void onCancel(DialogInterface dialog) {
        AndroidShortcuts sc = AndroidShortcuts.this;
        sc.setResult(RESULT_CANCELED);
        sc.finish();
        return;
      }
    });

    AlertDialog alert = builder.create();
    alert.show();
  }


  /**
   * Returns the results to the calling intent.
   */
  private void returnShortcut(String name, Uri command) {
    Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
    shortcutIntent.setData(command);

    Intent intent = new Intent();
    intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
    intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, name);
    Parcelable iconResource = Intent.ShortcutIconResource.fromContext(this, R.drawable.notes);
    intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource);

    // Now, return the result to the launcher

    setResult(RESULT_OK, intent);
    finish();
    return;
  }

}
