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/*****************************************************************************

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 *

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 *  $Id$

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 *

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 *  Copyright (C) 2006-2009  Florian Pose, Ingenieurgemeinschaft IgH

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 *

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 *  This file is part of the IgH EtherCAT Master.

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 *

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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or

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 *  modify it under the terms of the GNU General Public License version 2, as

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 *  published by the Free Software Foundation.

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 *

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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

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 *  Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License along

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 *  with the IgH EtherCAT Master; if not, write to the Free Software

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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

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 *

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 *  ---

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 *

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 *  The license mentioned above concerns the source code only. Using the

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 *  EtherCAT technology and brand is only permitted in compliance with the

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 *  industrial property and similar rights of Beckhoff Automation GmbH.

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 *

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 ****************************************************************************/

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#include <iostream>

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#include <map>

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using namespace std;

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#include "CommandGraph.h"

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/*****************************************************************************/

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CommandGraph::CommandGraph():

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    Command("graph", "Output the bus topology as a graph.")

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{

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}

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/*****************************************************************************/

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string CommandGraph::helpString() const

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{

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    stringstream str;

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    str << getName() << " [OPTIONS]" << endl

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        << endl

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        << getBriefDescription() << endl

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        << endl

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        << "The bus is output in DOT language (see" << endl

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        << "http://www.graphviz.org/doc/info/lang.html), which can" << endl

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        << "be processed with the tools from the Graphviz" << endl

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        << "package. Example:" << endl

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        << endl

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        << "  ethercat graph | dot -Tsvg > bus.svg" << endl

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        << endl

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        << "See 'man dot' for more information." << endl;

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    return str.str();

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}

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/****************************************************************************/

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void CommandGraph::execute(MasterDevice &m, const StringVector &args)

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{

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    ec_ioctl_master_t master;

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    unsigned int i;

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    typedef vector<ec_ioctl_slave_t> SlaveVector;

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    SlaveVector slaves;

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    ec_ioctl_slave_t slave;

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    SlaveVector::const_iterator si;

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    string font("fontname=\"Helvetica\"");

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    map<int, string> portMedia;

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    map<int, string>::const_iterator mi;

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    map<int, int> mediaWeights;

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    map<int, int>::const_iterator wi;

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    portMedia[EC_PORT_MII] = "MII";

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    mediaWeights[EC_PORT_MII] = 1;

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    portMedia[EC_PORT_EBUS] = "EBUS";

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    mediaWeights[EC_PORT_EBUS] = 5;

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    if (args.size()) {

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        stringstream err;

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        err << "'" << getName() << "' takes no arguments!";

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        throwInvalidUsageException(err);

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    }

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    m.open(MasterDevice::Read);

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    m.getMaster(&master);

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    for (i = 0; i < master.slave_count; i++) {

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        m.getSlave(&slave, i);

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        slaves.push_back(slave);

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    }

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    cout << "/* EtherCAT bus graph. Generated by 'ethercat graph'. */" << endl

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        << endl

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        << "strict graph bus {" << endl

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        << "    rankdir=\"LR\"" << endl

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        << endl

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        << "    master [" << font << ",label=\"EtherCAT\\nMaster\"]" << endl;

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    if (slaves.size()) {

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        cout << "    master -- slave0 [" << font;

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        mi = portMedia.find(slaves.front().port_descs[0]);

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        if (mi != portMedia.end())

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            cout << ",label=\"" << mi->second << "\"";

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        cout << "]" << endl;

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    }

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    cout << endl;

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    for (si = slaves.begin(); si != slaves.end(); si++) {

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	    cout << "    slave" << si->position << " [" << font <<

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            ",shape=\"box\",label=\"" << si->position;

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        if (string(si->order).size())

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            cout << "\\n" << si->order;

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        cout << "\"]" << endl;

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        for (i = 1; i < EC_MAX_PORTS; i++) {

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            if (si->next_slave[i] == 0xffff)

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                continue;

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            cout << "    slave" << si->position << " -- "

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                << "slave" << si->next_slave[i] << " [" << font << ","

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                << "taillabel=\"" << i << "\"";

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            mi = portMedia.find(si->port_descs[i]);

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            if (mi == portMedia.end()) {

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                /* Try medium of next-hop slave. */

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                unsigned int pos = si->next_slave[i];

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                if (pos < slaves.size()) {

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                    ec_ioctl_slave_t *next = &slaves[pos];

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                    mi = portMedia.find(next->port_descs[0]);

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                } else {

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                    cerr << "Invalid next slave pointer." << endl;

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                }

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            }

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            if (mi != portMedia.end())

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                cout << ",label=\"" << mi->second << "\"";

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            wi = mediaWeights.find(si->port_descs[i]);

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            if (wi != mediaWeights.end())

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                cout << ",weight=\"" << wi->second << "\"";

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            cout << "]" << endl;

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        }

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        cout << endl;

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    }

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    cout << "}" << endl;

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}

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/*****************************************************************************/