/* ownCloud Android client application
 *   Copyright (C) 2012-2014 ownCloud Inc.
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2,
 *   as published by the Free Software Foundation.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package com.owncloud.android.ui.dialog;

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockDialogFragment;
import com.owncloud.android.R;
import com.owncloud.android.datamodel.OCFile;
import com.owncloud.android.ui.activity.ComponentsGetter;
import com.owncloud.android.ui.activity.CopyToClipboardActivity;
import com.owncloud.android.ui.activity.FileActivity;
import com.owncloud.android.utils.Log_OC;

/**
 * Dialog showing a list activities able to resolve a given Intent, 
 * filtering out the activities matching give package names.
 * 
 * @author David A. Velasco
 */
public class ShareLinkToDialog  extends SherlockDialogFragment {
    
    private final static String TAG =  ShareLinkToDialog.class.getSimpleName();
    private final static String ARG_INTENT =  ShareLinkToDialog.class.getSimpleName() + ".ARG_INTENT";
    private final static String ARG_PACKAGES_TO_EXCLUDE =  ShareLinkToDialog.class.getSimpleName() + ".ARG_PACKAGES_TO_EXCLUDE";
    private final static String ARG_FILE_TO_SHARE = ShareLinkToDialog.class.getSimpleName() + ".FILE_TO_SHARE";
    
    private ActivityAdapter mAdapter;
    private OCFile mFile;
    private Intent mIntent;
    
    public static ShareLinkToDialog newInstance(Intent intent, String[] packagesToExclude, OCFile fileToShare) {
        ShareLinkToDialog f = new ShareLinkToDialog();
        Bundle args = new Bundle();
        args.putParcelable(ARG_INTENT, intent);
        args.putStringArray(ARG_PACKAGES_TO_EXCLUDE, packagesToExclude);
        args.putParcelable(ARG_FILE_TO_SHARE, fileToShare);
        f.setArguments(args);
        return f;
    }
    
    public ShareLinkToDialog() {
        super();
        Log_OC.d(TAG, "constructor");
    }
    
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        mIntent = getArguments().getParcelable(ARG_INTENT);
        String[] packagesToExclude = getArguments().getStringArray(ARG_PACKAGES_TO_EXCLUDE);
        List<String> packagesToExcludeList = Arrays.asList(packagesToExclude != null ? packagesToExclude : new String[0]);
        mFile = getArguments().getParcelable(ARG_FILE_TO_SHARE);
        
        PackageManager pm= getSherlockActivity().getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(mIntent, PackageManager.MATCH_DEFAULT_ONLY);
        Iterator<ResolveInfo> it = activities.iterator();
        ResolveInfo resolveInfo;
        while (it.hasNext()) {
            resolveInfo = it.next();
            if (packagesToExcludeList.contains(resolveInfo.activityInfo.packageName.toLowerCase())) {
                it.remove();
            }
        }
        
        boolean sendAction = mIntent.getBooleanExtra(Intent.ACTION_SEND, false);
        
        if (!sendAction) {
            // add activity for copy to clipboard
            Intent copyToClipboardIntent = new Intent(getSherlockActivity(), CopyToClipboardActivity.class);
            List<ResolveInfo> copyToClipboard = pm.queryIntentActivities(copyToClipboardIntent, 0);
            if (!copyToClipboard.isEmpty()) {
                activities.add(copyToClipboard.get(0));
            }
        }
        
        Collections.sort(activities, new ResolveInfo.DisplayNameComparator(pm)); 
        mAdapter = new ActivityAdapter(getSherlockActivity(), pm, activities);
        
        return createSelector(sendAction);
        
    }

    private AlertDialog createSelector(final boolean sendAction) {
    
        int titleId;
        if (sendAction) {
            titleId = R.string.activity_chooser_send_file_title;
        } else {
            titleId = R.string.activity_chooser_title;
        }
        
        return new AlertDialog.Builder(getSherlockActivity())
                    .setTitle(titleId)
                    .setAdapter(mAdapter, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // Add the information of the chosen activity to the intent to send 
                            ResolveInfo chosen = mAdapter.getItem(which);
                            ActivityInfo actInfo = chosen.activityInfo;
                            ComponentName name=new ComponentName(
                                    actInfo.applicationInfo.packageName, 
                                    actInfo.name);
                            mIntent.setComponent(name);                               

                            if (sendAction) {
                                dialog.dismiss();    // explicitly added for Android 2.x devices

                                // Send the file
                                ((FileActivity)getSherlockActivity()).startActivity(mIntent);

                            } else {
                                // Create a new share resource
                                ((ComponentsGetter)getSherlockActivity()).getFileOperationsHelper()
                                    .shareFileWithLinkToApp(mFile, mIntent);
                            }
                        }
        })
        .create();
    }
    
    class ActivityAdapter extends ArrayAdapter<ResolveInfo> {
        
        private PackageManager mPackageManager;
        
        ActivityAdapter(Context context, PackageManager pm, List<ResolveInfo> apps) {
            super(context, R.layout.activity_row, apps);
            this.mPackageManager = pm;
        }
        
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = newView(parent);
            }
            bindView(position, convertView);
            return convertView;
        }
        
        private View newView(ViewGroup parent) {
            return(((LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.activity_row, parent, false));
        }
        
        private void bindView(int position, View row) {
            TextView label = (TextView) row.findViewById(R.id.title);
            label.setText(getItem(position).loadLabel(mPackageManager));
            ImageView icon = (ImageView) row.findViewById(R.id.icon);
            icon.setImageDrawable(getItem(position).loadIcon(mPackageManager));
        }
    }
    
}