/*
 * Copyright (C) 2014 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.app;

import android.os.Parcel;
import android.os.ParcelFileDescriptor;
import android.os.Parcelable;
import android.util.Slog;

import java.io.IOException;
import java.util.Objects;

/**
 * System private API for passing profiler settings.
 *
 * {@hide}
 */
public class ProfilerInfo implements Parcelable {

    private static final String TAG = "ProfilerInfo";

    /* Name of profile output file. */
    public final String profileFile;

    /* File descriptor for profile output file, can be null. */
    public ParcelFileDescriptor profileFd;

    /* Indicates sample profiling when nonzero, interval in microseconds. */
    public final int samplingInterval;

    /* Automatically stop the profiler when the app goes idle. */
    public final boolean autoStopProfiler;

    /*
     * Indicates whether to stream the profiling info to the out file continuously.
     */
    public final boolean streamingOutput;

    /**
     * Denotes an agent (and its parameters) to attach for profiling.
     */
    public final String agent;

    public ProfilerInfo(String filename, ParcelFileDescriptor fd, int interval, boolean autoStop,
            boolean streaming, String agent) {
        profileFile = filename;
        profileFd = fd;
        samplingInterval = interval;
        autoStopProfiler = autoStop;
        streamingOutput = streaming;
        this.agent = agent;
    }

    public ProfilerInfo(ProfilerInfo in) {
        profileFile = in.profileFile;
        profileFd = in.profileFd;
        samplingInterval = in.samplingInterval;
        autoStopProfiler = in.autoStopProfiler;
        streamingOutput = in.streamingOutput;
        agent = in.agent;
    }

    /**
     * Close profileFd, if it is open. The field will be null after a call to this function.
     */
    public void closeFd() {
        if (profileFd != null) {
            try {
                profileFd.close();
            } catch (IOException e) {
                Slog.w(TAG, "Failure closing profile fd", e);
            }
            profileFd = null;
        }
    }

    @Override
    public int describeContents() {
        if (profileFd != null) {
            return profileFd.describeContents();
        } else {
            return 0;
        }
    }

    @Override
    public void writeToParcel(Parcel out, int flags) {
        out.writeString(profileFile);
        if (profileFd != null) {
            out.writeInt(1);
            profileFd.writeToParcel(out, flags);
        } else {
            out.writeInt(0);
        }
        out.writeInt(samplingInterval);
        out.writeInt(autoStopProfiler ? 1 : 0);
        out.writeInt(streamingOutput ? 1 : 0);
        out.writeString(agent);
    }

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

                @Override
                public ProfilerInfo[] newArray(int size) {
                    return new ProfilerInfo[size];
                }
            };

    private ProfilerInfo(Parcel in) {
        profileFile = in.readString();
        profileFd = in.readInt() != 0 ? ParcelFileDescriptor.CREATOR.createFromParcel(in) : null;
        samplingInterval = in.readInt();
        autoStopProfiler = in.readInt() != 0;
        streamingOutput = in.readInt() != 0;
        agent = in.readString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final ProfilerInfo other = (ProfilerInfo) o;
        // TODO: Also check #profileFd for equality.
        return Objects.equals(profileFile, other.profileFile)
                && autoStopProfiler == other.autoStopProfiler
                && samplingInterval == other.samplingInterval
                && streamingOutput == other.streamingOutput
                && Objects.equals(agent, other.agent);
    }

    @Override
    public int hashCode() {
        int result = 17;
        result = 31 * result + Objects.hashCode(profileFile);
        result = 31 * result + samplingInterval;
        result = 31 * result + (autoStopProfiler ? 1 : 0);
        result = 31 * result + (streamingOutput ? 1 : 0);
        result = 31 * result + Objects.hashCode(agent);
        return result;
    }
}