/*
 * 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 android.net.metrics;

import android.annotation.IntDef;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.SparseArray;

import com.android.internal.util.MessageUtils;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * An event recorded by IpManager when IP provisioning completes for a network or
 * when a network disconnects.
 * {@hide}
 */
public final class IpManagerEvent implements Parcelable {

    public static final int PROVISIONING_OK                       = 1;
    public static final int PROVISIONING_FAIL                     = 2;
    public static final int COMPLETE_LIFECYCLE                    = 3;
    public static final int ERROR_STARTING_IPV4                   = 4;
    public static final int ERROR_STARTING_IPV6                   = 5;
    public static final int ERROR_STARTING_IPREACHABILITYMONITOR  = 6;
    public static final int ERROR_INVALID_PROVISIONING            = 7;

    @IntDef(value = {
            PROVISIONING_OK, PROVISIONING_FAIL, COMPLETE_LIFECYCLE,
            ERROR_STARTING_IPV4, ERROR_STARTING_IPV6, ERROR_STARTING_IPREACHABILITYMONITOR,
            ERROR_INVALID_PROVISIONING,
    })
    @Retention(RetentionPolicy.SOURCE)
    public @interface EventType {}

    public final @EventType int eventType;
    public final long durationMs;

    public IpManagerEvent(@EventType int eventType, long duration) {
        this.eventType = eventType;
        this.durationMs = duration;
    }

    private IpManagerEvent(Parcel in) {
        this.eventType = in.readInt();
        this.durationMs = in.readLong();
    }

    @Override
    public void writeToParcel(Parcel out, int flags) {
        out.writeInt(eventType);
        out.writeLong(durationMs);
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public static final Parcelable.Creator<IpManagerEvent> CREATOR
        = new Parcelable.Creator<IpManagerEvent>() {
        public IpManagerEvent createFromParcel(Parcel in) {
            return new IpManagerEvent(in);
        }

        public IpManagerEvent[] newArray(int size) {
            return new IpManagerEvent[size];
        }
    };

    @Override
    public String toString() {
        return String.format("IpManagerEvent(%s, %dms)",
                Decoder.constants.get(eventType), durationMs);
    }

    final static class Decoder {
        static final SparseArray<String> constants = MessageUtils.findMessageNames(
                new Class[]{IpManagerEvent.class},
                new String[]{"PROVISIONING_", "COMPLETE_", "ERROR_"});
    }
}