/*
 * 				Firetweet - Twitter client for Android
 * 
 *  Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
 * 
 *  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.getlantern.firetweet.activity;

import android.app.ActionBar;
import android.app.FragmentManager;
import android.os.Bundle;
import android.view.MenuItem;

import org.getlantern.firetweet.fragment.CustomTabsFragment;
import org.getlantern.firetweet.model.SupportTabSpec;

import java.util.ArrayList;
import java.util.List;

import static org.getlantern.firetweet.util.CustomTabUtils.getHomeTabs;

public class CustomTabsActivity extends BasePreferenceActivity {

    private final List<SupportTabSpec> mCustomTabs = new ArrayList<>();

    @Override
    public void onBackPressed() {
        final List<SupportTabSpec> tabs = getHomeTabs(this);
        setResult(isTabsChanged(tabs) && !tabs.isEmpty() ? RESULT_OK : RESULT_CANCELED);
        finish();
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        switch (item.getItemId()) {
            case MENU_HOME: {
                onBackPressed();
                return true;
            }
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final ActionBar ab = getActionBar();
        if (ab != null) {
            ab.setDisplayHomeAsUpEnabled(true);
        }
        final FragmentManager fm = getFragmentManager();
        fm.beginTransaction().replace(android.R.id.content, new CustomTabsFragment()).commit();
        initTabs();
    }

    private void initTabs() {
        mCustomTabs.clear();
        mCustomTabs.addAll(getHomeTabs(this));
    }

    private boolean isTabsChanged(final List<SupportTabSpec> tabs) {
        if (mCustomTabs.size() != tabs.size()) return true;
        for (int i = 0, size = mCustomTabs.size(); i < size; i++) {
            if (!mCustomTabs.get(i).equals(tabs.get(i))) return true;
        }
        return false;
    }
}