/*
 * Copyright (C) 2016 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.settings.datausage;

import android.os.Bundle;
import android.support.v7.preference.Preference;
import android.util.Log;
import android.widget.Switch;
import com.android.settings.InstrumentedFragment;
import com.android.settings.R;
import com.android.settings.SettingsActivity;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.widget.SwitchBar;

public class DataSaverSummary extends SettingsPreferenceFragment
        implements SwitchBar.OnSwitchChangeListener, DataSaverBackend.Listener {

    private static final String KEY_UNRESTRICTED_ACCESS = "unrestricted_access";

    private SwitchBar mSwitchBar;
    private DataSaverBackend mDataSaverBackend;
    private Preference mUnrestrictedAccess;

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

        addPreferencesFromResource(R.xml.data_saver);
        mUnrestrictedAccess = findPreference(KEY_UNRESTRICTED_ACCESS);
        mDataSaverBackend = new DataSaverBackend(getContext());
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        mSwitchBar = ((SettingsActivity) getActivity()).getSwitchBar();
        mSwitchBar.show();
        mSwitchBar.addOnSwitchChangeListener(this);
    }

    @Override
    public void onResume() {
        super.onResume();
        mDataSaverBackend.addListener(this);
        mDataSaverBackend.refreshWhitelist();
        int count = mDataSaverBackend.getWhitelistedCount();
        mUnrestrictedAccess.setSummary(getResources().getQuantityString(
                R.plurals.data_saver_unrestricted_summary, count, count));
    }

    @Override
    public void onPause() {
        super.onPause();
        mDataSaverBackend.remListener(this);
    }

    @Override
    public void onSwitchChanged(Switch switchView, boolean isChecked) {
        mDataSaverBackend.setDataSaverEnabled(isChecked);
    }

    @Override
    protected int getMetricsCategory() {
        return InstrumentedFragment.DATA_SAVER_SUMMARY;
    }

    @Override
    public void onDataSaverChanged(boolean isDataSaving) {
        mSwitchBar.setChecked(isDataSaving);
    }
}