/**
 * MltFilteredConsumer.cpp - MLT Wrapper
 * Copyright (C) 2004-2015 Meltytech, LLC
 * Author: Charles Yates <charles.yates@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "MltFilteredConsumer.h"
using namespace Mlt;

FilteredConsumer::FilteredConsumer(Profile &profile, const char *id, const char *arg)
    : Consumer(profile, id, arg)
{
    // Create a reference to the first service
    first = new Service(*this);
}

FilteredConsumer::FilteredConsumer(Consumer &consumer)
    : Consumer(consumer)
{
    // Create a reference to the first service
    first = new Service(*this);
}

FilteredConsumer::~FilteredConsumer()
{
    // Delete the reference to the first service
    delete first;
}

int FilteredConsumer::connect(Service &service)
{
    // All producers must connect to the first service, hence the use of the virtual here
    return first->connect_producer(service);
}

int FilteredConsumer::attach(Filter &filter)
{
    int error = 0;
    if (filter.is_valid()) {
        Service *producer = first->producer();
        error = filter.connect(*producer);
        if (error == 0) {
            first->connect_producer(filter);
            delete first;
            first = new Service(filter);
        }
        delete producer;
    } else {
        error = 1;
    }
    return error;
}

int FilteredConsumer::last(Filter &filter)
{
    int error = 0;
    if (filter.is_valid()) {
        Service *producer = this->producer();
        error = filter.connect(*producer);
        if (error == 0)
            connect_producer(filter);
        delete producer;
    } else {
        error = 1;
    }
    return error;
}

int FilteredConsumer::detach(Filter &filter)
{
    if (filter.is_valid()) {
        Service *it = new Service(*first);
        while (it->is_valid() && it->get_service() != filter.get_service()) {
            Service *consumer = it->consumer();
            delete it;
            it = consumer;
        }
        if (it->get_service() == filter.get_service()) {
            Service *producer = it->producer();
            Service *consumer = it->consumer();
            consumer->connect_producer(*producer);
            Service dummy;
            it->connect_producer(dummy);
            if (first->get_service() == it->get_service()) {
                delete first;
                first = new Service(*consumer);
            }
        }
        delete it;
    }
    return 0;
}
