/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * Copyright (C) 2003-2006

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include <lemon/list_graph.h>

#include <lemon/topology.h>

#include <lemon/graph_to_eps.h>

#include <lemon/graph_reader.h>

#include <lemon/dim2.h>

#include <iostream>

#include <cstdlib>

#include <ctime>

/// \ingroup demos

/// \file

/// \brief Demo what shows the result of some topology functions.

///

///  Demo what shows the result of some topology functions.

///

/// \include topology_demo.cc

using namespace lemon;

using namespace std;

Color color(bool val) {

  return val ? RED : BLUE;

}

void drawConnectedComponents() {

  typedef ListUGraph Graph;

  typedef Graph::Node Node;

  Graph graph;

  Graph::NodeMap<dim2::Point<double> > coords(graph);

  UGraphReader<Graph>("u_components.lgf", graph).

    readNodeMap("coordinates_x", xMap(coords)).

    readNodeMap("coordinates_y", yMap(coords)).

    run();

  Palette palette;

  Graph::NodeMap<int> compMap(graph);

  connectedComponents(graph, compMap);

  graphToEps(graph, "connected_components.eps").undirected().

    coords(coords).scaleToA4().enableParallel().

    parEdgeDist(20.0).edgeWidthScale(2.0).nodeScale(20.0).

    nodeColors(composeMap(palette, compMap)).run();

  std::cout << "Result: connected_components.eps" << std::endl;

}

void drawStronglyConnectedComponents() {

  typedef ListGraph Graph;

  typedef Graph::Node Node;

  Graph graph;

  Graph::NodeMap<dim2::Point<double> > coords(graph);

  GraphReader<Graph>("dir_components.lgf", graph).

    readNodeMap("coordinates_x", xMap(coords)).

    readNodeMap("coordinates_y", yMap(coords)).

    run();

  Palette palette;

  Graph::NodeMap<int> compMap(graph);

  Graph::EdgeMap<bool> cutMap(graph);

  stronglyConnectedComponents(graph, compMap);

  stronglyConnectedCutEdges(graph, cutMap);

  graphToEps(graph, "strongly_connected_components.eps").

    coords(coords).scaleToA4().enableParallel().

    drawArrows().arrowWidth(10.0).arrowLength(10.0).

    parEdgeDist(20.0).edgeWidthScale(2.0).nodeScale(20.0).

    nodeColors(composeMap(palette, compMap)).

    edgeColors(composeMap(functorMap(&color), cutMap)).run();

  std::cout << "Result: strongly_connected_components.eps" << std::endl;

}

void drawNodeBiconnectedComponents() {

  typedef ListUGraph Graph;

  typedef Graph::Node Node;

  typedef Graph::UEdge UEdge;

  Graph graph;

  Graph::NodeMap<dim2::Point<double> > coords(graph);

  UGraphReader<Graph>("u_components.lgf", graph).

    readNodeMap("coordinates_x", xMap(coords)).

    readNodeMap("coordinates_y", yMap(coords)).

    run();

  Palette palette;

  Graph::UEdgeMap<int> compMap(graph);

  Graph::NodeMap<bool> cutMap(graph);

  biNodeConnectedComponents(graph, compMap);

  biNodeConnectedCutNodes(graph, cutMap);

  graphToEps(graph, "bi_node_connected_components.eps").undirected().

    coords(coords).scaleToA4().enableParallel().

    parEdgeDist(20.0).edgeWidthScale(5.0).nodeScale(20.0).

    edgeColors(composeMap(palette, compMap)).

    nodeColors(composeMap(functorMap(&color), cutMap)).

    run();

  std::cout << "Result: bi_node_connected_components.eps" << std::endl;

}

void drawEdgeBiconnectedComponents() {

  typedef ListUGraph Graph;

  typedef Graph::Node Node;

  typedef Graph::UEdge UEdge;

  Graph graph;

  Graph::NodeMap<dim2::Point<double> > coords(graph);

  UGraphReader<Graph>("u_components.lgf", graph).

    readNodeMap("coordinates_x", xMap(coords)).

    readNodeMap("coordinates_y", yMap(coords)).

    run();

  Palette palette;

  Graph::NodeMap<int> compMap(graph);

  Graph::UEdgeMap<bool> cutMap(graph);

  biEdgeConnectedComponents(graph, compMap);

  biEdgeConnectedCutEdges(graph, cutMap);

  graphToEps(graph, "bi_edge_connected_components.eps").undirected().

    coords(coords).scaleToA4().enableParallel().

    parEdgeDist(20.0).edgeWidthScale(2.0).nodeScale(20.0).

    nodeColors(composeMap(palette, compMap)).

    edgeColors(composeMap(functorMap(&color), cutMap)).run();

  std::cout << "Result: bi_edge_connected_components.eps" << std::endl;

}

void drawBipartitePartitions() {

  typedef ListUGraph Graph;

  typedef Graph::Node Node;

  typedef Graph::UEdge UEdge;

  Graph graph;

  Graph::NodeMap<dim2::Point<double> > coords(graph);

  UGraphReader<Graph>("partitions.lgf", graph).

    readNodeMap("coordinates_x", xMap(coords)).

    readNodeMap("coordinates_y", yMap(coords)).

    run();

  Palette palette;

  Graph::NodeMap<bool> partMap(graph);

  bipartitePartitions(graph, partMap);

  graphToEps(graph, "bipartite_partitions.eps").undirected().

    coords(coords).scaleToA4().enableParallel().

    parEdgeDist(20.0).edgeWidthScale(2.0).nodeScale(20.0).

    nodeColors(composeMap(functorMap(&color), partMap)).run();

  std::cout << "Result: bipartite_partitions.eps" << std::endl;

} 

int main() {

  srand(time(0));

  drawConnectedComponents();

  drawStronglyConnectedComponents();

  drawNodeBiconnectedComponents();

  drawEdgeBiconnectedComponents();

  drawBipartitePartitions();

  return 0;

}