/*
 * Copyright (C) 2017 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.fuelgauge.anomaly;

import android.support.annotation.VisibleForTesting;
import android.support.v14.preference.PreferenceFragment;
import android.support.v7.preference.Preference;

import java.util.List;

/**
 * Manager that responsible for updating anomaly preference and handling preference click.
 */
public class AnomalyPreferenceController {
    private static final String TAG = "AnomalyPreferenceController";
    @VisibleForTesting
    static final String ANOMALY_KEY = "high_usage";
    private static final int REQUEST_ANOMALY_ACTION = 0;
    private PreferenceFragment mFragment;
    @VisibleForTesting
    Preference mAnomalyPreference;
    @VisibleForTesting
    List<Anomaly> mAnomalies;

    public AnomalyPreferenceController(PreferenceFragment fragment) {
        mFragment = fragment;
        mAnomalyPreference = mFragment.getPreferenceScreen().findPreference(ANOMALY_KEY);
        hideAnomalyPreference();
    }

    public boolean onPreferenceTreeClick(Preference preference) {
        if (mAnomalies != null && ANOMALY_KEY.equals(preference.getKey())) {
            if (mAnomalies.size() == 1) {
                final Anomaly anomaly = mAnomalies.get(0);
                AnomalyDialogFragment dialogFragment = AnomalyDialogFragment.newInstance(anomaly);
                dialogFragment.setTargetFragment(mFragment, REQUEST_ANOMALY_ACTION);
                dialogFragment.show(mFragment.getFragmentManager(), TAG);
            } else {
                //TODO(b/37681665): start a new fragment to handle it
            }
            return true;
        }
        return false;
    }

    /**
     * Update anomaly preference based on {@code anomalies}, also store a reference
     * of {@paramref anomalies}, which would be used in {@link #onPreferenceTreeClick(Preference)}
     *
     * @param anomalies used to update the summary, this method will store a reference of it
     */
    public void updateAnomalyPreference(List<Anomaly> anomalies) {
        mAnomalies = anomalies;

        mAnomalyPreference.setVisible(true);
        //TODO(b/36924669): update summary for anomaly preference
    }

    public void hideAnomalyPreference() {
        mAnomalyPreference.setVisible(false);
    }
}