/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.action.admin.cluster.snapshots.status;

import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.Iterators;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.ChunkedToXContent;
import org.elasticsearch.common.xcontent.ChunkedToXContentObject;
import org.elasticsearch.xcontent.ToXContent;

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

/**
 * Snapshot status response
 */
public class SnapshotsStatusResponse extends ActionResponse implements ChunkedToXContentObject {

    private final List<SnapshotStatus> snapshots;

    public SnapshotsStatusResponse(StreamInput in) throws IOException {
        snapshots = in.readCollectionAsImmutableList(SnapshotStatus::new);
    }

    SnapshotsStatusResponse(List<SnapshotStatus> snapshots) {
        this.snapshots = snapshots;
    }

    /**
     * Returns the list of snapshots
     *
     * @return the list of snapshots
     */
    public List<SnapshotStatus> getSnapshots() {
        return snapshots;
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        out.writeCollection(snapshots);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        return Objects.equals(snapshots, ((SnapshotsStatusResponse) o).snapshots);
    }

    @Override
    public int hashCode() {
        return snapshots != null ? snapshots.hashCode() : 0;
    }

    @Override
    public Iterator<? extends ToXContent> toXContentChunked(ToXContent.Params params) {
        return Iterators.<ToXContent>concat(
            Iterators.single((b, p) -> b.startObject().startArray("snapshots")),
            Iterators.flatMap(snapshots.iterator(), s -> s.toXContentChunked(params)),
            Iterators.single((b, p) -> b.endArray().endObject())
        );
    }

    @Override
    public String toString() {
        return Strings.toString(ChunkedToXContent.wrapAsToXContent(this), true, true);
    }
}