/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 com.android.browser.widget;

import android.app.ListActivity;
import android.app.LoaderManager.LoaderCallbacks;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.BrowserContract.Accounts;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.android.browser.AddBookmarkPage.BookmarkAccount;
import com.android.browser.R;
import com.android.browser.provider.BrowserProvider2;

public class BookmarkWidgetConfigure extends ListActivity
        implements OnClickListener, LoaderCallbacks<Cursor> {

    static final int LOADER_ACCOUNTS = 1;

    private ArrayAdapter<BookmarkAccount> mAccountAdapter;
    private int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setResult(RESULT_CANCELED);
        setVisible(false);
        setContentView(R.layout.widget_account_selection);
        findViewById(R.id.cancel).setOnClickListener(this);
        mAccountAdapter = new ArrayAdapter<BookmarkAccount>(this,
                android.R.layout.simple_list_item_1);
        setListAdapter(mAccountAdapter);
        Intent intent = getIntent();
        Bundle extras = intent.getExtras();
        if (extras != null) {
            mAppWidgetId = extras.getInt(
                    AppWidgetManager.EXTRA_APPWIDGET_ID,
                    AppWidgetManager.INVALID_APPWIDGET_ID);
        }
        if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) {
            finish();
        } else {
            getLoaderManager().initLoader(LOADER_ACCOUNTS, null, this);
        }
    }

    @Override
    public void onClick(View v) {
        finish();
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        BookmarkAccount account = mAccountAdapter.getItem(position);
        pickAccount(account.rootFolderId);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        return new AccountsLoader(this);
    }

    void pickAccount(long rootId) {
        BookmarkThumbnailWidgetService.setupWidgetState(this, mAppWidgetId, rootId);
        Intent result = new Intent();
        result.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
        setResult(RESULT_OK, result);
        finish();
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        if (cursor == null || cursor.getCount() < 1) {
            // We always have the local account, so fall back to that
            pickAccount(BrowserProvider2.FIXED_ID_ROOT);
        } else if (cursor.getCount() == 1) {
            cursor.moveToFirst();
            pickAccount(cursor.getLong(AccountsLoader.COLUMN_INDEX_ROOT_ID));
        } else {
            mAccountAdapter.clear();
            while (cursor.moveToNext()) {
                mAccountAdapter.add(new BookmarkAccount(this, cursor));
            }
            setVisible(true);
        }
        getLoaderManager().destroyLoader(LOADER_ACCOUNTS);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        // Don't care
    }

    static class AccountsLoader extends CursorLoader {

        static final String[] PROJECTION = new String[] {
            Accounts.ACCOUNT_NAME,
            Accounts.ACCOUNT_TYPE,
            Accounts.ROOT_ID,
        };

        static final int COLUMN_INDEX_ACCOUNT_NAME = 0;
        static final int COLUMN_INDEX_ACCOUNT_TYPE = 1;
        static final int COLUMN_INDEX_ROOT_ID = 2;

        public AccountsLoader(Context context) {
            super(context, Accounts.CONTENT_URI
                    .buildUpon()
                    .appendQueryParameter(BrowserProvider2.PARAM_ALLOW_EMPTY_ACCOUNTS, "false")
                    .build(), PROJECTION, null, null, null);
        }

    }

}