/**
 * Copyright (c) 2013, Redsolution LTD. All rights reserved.
 *
 * This file is part of Xabber project; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License, Version 3.
 *
 * Xabber is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License,
 * along with this program. If not, see http://www.gnu.org/licenses/.
 */
package com.xabber.android.data.extension.archive;

/**
 * Store history for the user while receiving from the message archive.
 *
 * @author alexander.ivanov
 */
public class HistoryStorage extends HeaderSequence {

    /**
     * Packet ID of the list request.
     */
    private String packetId;

    /**
     * Number of new received messages.
     */
    private int receivedNew;

    /**
     * Number of incoming received messages.
     */
    private int receivedIncoming;

    /**
     * Number of new messages to be received.
     */
    private Integer requestedNew;

    /**
     * Number of incoming messages to be received.
     */
    private Integer requestedIncoming;

    public HistoryStorage() {
        super();
        onSuccess();
    }

    public boolean hasPacketId(String packetId) {
        return this.packetId != null && this.packetId.equals(packetId);
    }

    public void setPacketId(String packetId) {
        this.packetId = packetId;
    }

    /**
     * @param receivedNew
     * @param receivedIncoming
     * @return Whether there is enough messages received.
     */
    public boolean enoughMessages(int receivedNew, int receivedIncoming) {
        this.receivedNew += receivedNew;
        this.receivedIncoming += receivedIncoming;
        return this.receivedNew >= requestedNew
                && this.receivedIncoming >= requestedIncoming;
    }

    /**
     * Request has been started.
     *
     * @param requestedNew
     * @param requestedIncoming
     */
    public void onRequest(int requestedNew, int requestedIncoming) {
        this.requestedNew = requestedNew;
        this.requestedIncoming = requestedIncoming;
        onResume();
    }

    /**
     * @return Whether next history request should be sent.
     */
    public boolean onResume() {
        packetId = null;
        if (requestedNew <= 0 && requestedIncoming <= 0)
            return false;
        super.setInProgress(true);
        return true;
    }

    /**
     * Set number of requested messages at least as specified.
     *
     * @param requestedNew
     * @param requestedIncoming
     */
    public void setRequestedCountAtLeast(int requestedNew, int requestedIncoming) {
        this.requestedNew = Math.max(this.requestedNew, requestedNew);
        this.requestedIncoming = Math.max(this.requestedIncoming,
                requestedIncoming);
    }

    /**
     * History portion request has been completed.
     */
    public void onSuccess() {
        super.setInProgress(false);
        packetId = null;
        receivedNew = 0;
        receivedIncoming = 0;
        requestedNew = 0;
        requestedIncoming = 0;
    }

}
