/*
 * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 org.sufficientlysecure.keychain.ui;

import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ListView;

import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.helper.ActionBarHelper;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.ui.adapter.ViewKeyKeysAdapter;
import org.sufficientlysecure.keychain.ui.adapter.ViewKeyUserIdsAdapter;
import org.sufficientlysecure.keychain.util.Log;

public class EditKeyFragment extends LoaderFragment implements
        LoaderManager.LoaderCallbacks<Cursor> {

    public static final String ARG_DATA_URI = "uri";

    private ListView mUserIds;
    private ListView mKeys;

    private static final int LOADER_ID_USER_IDS = 0;
    private static final int LOADER_ID_KEYS = 1;

    private ViewKeyUserIdsAdapter mUserIdsAdapter;
    private ViewKeyKeysAdapter mKeysAdapter;

    private Uri mDataUri;

    /**
     * Creates new instance of this fragment
     */
    public static EditKeyFragment newInstance(Uri dataUri) {
        EditKeyFragment frag = new EditKeyFragment();

        Bundle args = new Bundle();
        args.putParcelable(ARG_DATA_URI, dataUri);

        frag.setArguments(args);

        return frag;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup superContainer, Bundle savedInstanceState) {
        View root = super.onCreateView(inflater, superContainer, savedInstanceState);
        View view = inflater.inflate(R.layout.edit_key_fragment, getContainer());

        mUserIds = (ListView) view.findViewById(R.id.edit_key_user_ids);
        mKeys = (ListView) view.findViewById(R.id.edit_key_keys);
//        mActionEdit = view.findViewById(R.id.view_key_action_edit);

        return root;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);


        // Inflate a "Done"/"Cancel" custom action bar view
        ActionBarHelper.setTwoButtonView(((ActionBarActivity) getActivity()).getSupportActionBar(),
                R.string.btn_save, R.drawable.ic_action_save,
                new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        // Save
                        save();
                    }
                }, R.string.menu_key_edit_cancel, R.drawable.ic_action_cancel,
                new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        // Cancel
                        getActivity().finish();
                    }
                }
        );

        Uri dataUri = getArguments().getParcelable(ARG_DATA_URI);
        if (dataUri == null) {
            Log.e(Constants.TAG, "Data missing. Should be Uri of key!");
            getActivity().finish();
            return;
        }

        loadData(dataUri);
    }

    private void loadData(Uri dataUri) {
        mDataUri = dataUri;

        Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString());

//        mActionEncrypt.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                encrypt(mDataUri);
//            }
//        });


        mUserIdsAdapter = new ViewKeyUserIdsAdapter(getActivity(), null, 0);
        mUserIds.setAdapter(mUserIdsAdapter);
        mKeysAdapter = new ViewKeyKeysAdapter(getActivity(), null, 0);
        mKeys.setAdapter(mKeysAdapter);

        // Prepare the loaders. Either re-connect with an existing ones,
        // or start new ones.
        getLoaderManager().initLoader(LOADER_ID_USER_IDS, null, this);
        getLoaderManager().initLoader(LOADER_ID_KEYS, null, this);
    }

    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        setContentShown(false);

        switch (id) {
            case LOADER_ID_USER_IDS: {
                Uri baseUri = KeychainContract.UserIds.buildUserIdsUri(mDataUri);
                return new CursorLoader(getActivity(), baseUri,
                        ViewKeyUserIdsAdapter.USER_IDS_PROJECTION, null, null, null);
            }

            case LOADER_ID_KEYS: {
                Uri baseUri = KeychainContract.Keys.buildKeysUri(mDataUri);
                return new CursorLoader(getActivity(), baseUri,
                        ViewKeyKeysAdapter.KEYS_PROJECTION, null, null, null);
            }

            default:
                return null;
        }
    }

    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        // Swap the new cursor in. (The framework will take care of closing the
        // old cursor once we return.)
        switch (loader.getId()) {
            case LOADER_ID_USER_IDS:
                mUserIdsAdapter.swapCursor(data);
                break;

            case LOADER_ID_KEYS:
                mKeysAdapter.swapCursor(data);
                break;

        }
        setContentShown(true);
    }

    /**
     * This is called when the last Cursor provided to onLoadFinished() above is about to be closed.
     * We need to make sure we are no longer using it.
     */
    public void onLoaderReset(Loader<Cursor> loader) {
        switch (loader.getId()) {
            case LOADER_ID_USER_IDS:
                mUserIdsAdapter.swapCursor(null);
                break;
            case LOADER_ID_KEYS:
                mKeysAdapter.swapCursor(null);
                break;
        }
    }

    private void save() {
        getActivity().finish();
        // TODO
    }


}