/*
 * Copyright (C) 2013 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.view.textclassifier;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.Binder;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;

import java.util.Locale;
import java.util.Objects;
import java.util.UUID;

/**
 * This class represents the id of a text classification session.
 */
public final class TextClassificationSessionId implements Parcelable {
    @NonNull
    private final String mValue;
    @NonNull
    private final IBinder mToken;

    /**
     * Creates a new instance.
     *
     * @hide
     */
    public TextClassificationSessionId() {
        this(UUID.randomUUID().toString(), new Binder());
    }

    /**
     * Creates a new instance.
     *
     * @param value The internal value.
     *
     * @hide
     */
    public TextClassificationSessionId(@NonNull String value, @NonNull IBinder token) {
        mValue = Objects.requireNonNull(value);
        mToken = Objects.requireNonNull(token);
    }

    /** @hide */
    @NonNull
    public IBinder getToken() {
        return mToken;
    }

    @Override
    public boolean equals(@Nullable Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        TextClassificationSessionId that = (TextClassificationSessionId) o;
        return Objects.equals(mValue, that.mValue) && Objects.equals(mToken, that.mToken);
    }

    @Override
    public int hashCode() {
        return Objects.hash(mValue, mToken);
    }

    @Override
    public String toString() {
        return String.format(Locale.US, "TextClassificationSessionId {%s}", mValue);
    }

    @Override
    public void writeToParcel(Parcel parcel, int flags) {
        parcel.writeString(mValue);
        parcel.writeStrongBinder(mToken);
    }

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

    /**
     * Returns the value of this ID.
     */
    @NonNull
    public String getValue() {
        return mValue;
    }

    @NonNull
    public static final Parcelable.Creator<TextClassificationSessionId> CREATOR =
            new Parcelable.Creator<TextClassificationSessionId>() {
                @Override
                public TextClassificationSessionId createFromParcel(Parcel parcel) {
                    return new TextClassificationSessionId(
                            parcel.readString(), parcel.readStrongBinder());
                }

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