/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

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

 *

 * Copyright (C) 2003-2009

 * 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 <iostream>

#include <vector>

#include "test_tools.h"

#include <lemon/maps.h>

#include <lemon/kruskal.h>

#include <lemon/list_graph.h>

#include <lemon/concepts/maps.h>

#include <lemon/concepts/digraph.h>

#include <lemon/concepts/graph.h>

using namespace std;

using namespace lemon;

void checkCompileKruskal()

{

  concepts::WriteMap<concepts::Digraph::Arc,bool> w;

  concepts::WriteMap<concepts::Graph::Edge,bool> uw;

  concepts::ReadMap<concepts::Digraph::Arc,int> r;

  concepts::ReadMap<concepts::Graph::Edge,int> ur;

  concepts::Digraph g;

  concepts::Graph ug;

  kruskal(g, r, w);

  kruskal(ug, ur, uw);

  std::vector<std::pair<concepts::Digraph::Arc, int> > rs;

  std::vector<std::pair<concepts::Graph::Edge, int> > urs;

  kruskal(g, rs, w);

  kruskal(ug, urs, uw);

  std::vector<concepts::Digraph::Arc> ws;

  std::vector<concepts::Graph::Edge> uws;

  kruskal(g, r, ws.begin());

  kruskal(ug, ur, uws.begin());

}

int main() {

  typedef ListGraph::Node Node;

  typedef ListGraph::Edge Edge;

  typedef ListGraph::NodeIt NodeIt;

  typedef ListGraph::ArcIt ArcIt;

  ListGraph G;

  Node s=G.addNode();

  Node v1=G.addNode();

  Node v2=G.addNode();

  Node v3=G.addNode();

  Node v4=G.addNode();

  Node t=G.addNode();

  Edge e1 = G.addEdge(s, v1);

  Edge e2 = G.addEdge(s, v2);

  Edge e3 = G.addEdge(v1, v2);

  Edge e4 = G.addEdge(v2, v1);

  Edge e5 = G.addEdge(v1, v3);

  Edge e6 = G.addEdge(v3, v2);

  Edge e7 = G.addEdge(v2, v4);

  Edge e8 = G.addEdge(v4, v3);

  Edge e9 = G.addEdge(v3, t);

  Edge e10 = G.addEdge(v4, t);

  typedef ListGraph::EdgeMap<int> ECostMap;

  typedef ListGraph::EdgeMap<bool> EBoolMap;

  ECostMap edge_cost_map(G, 2);

  EBoolMap tree_map(G);

  //Test with const map.

  check(kruskal(G, ConstMap<ListGraph::Edge,int>(2), tree_map)==10,

        "Total cost should be 10");

  //Test with an edge map (filled with uniform costs).

  check(kruskal(G, edge_cost_map, tree_map)==10,

        "Total cost should be 10");

  edge_cost_map[e1] = -10;

  edge_cost_map[e2] = -9;

  edge_cost_map[e3] = -8;

  edge_cost_map[e4] = -7;

  edge_cost_map[e5] = -6;

  edge_cost_map[e6] = -5;

  edge_cost_map[e7] = -4;

  edge_cost_map[e8] = -3;

  edge_cost_map[e9] = -2;

  edge_cost_map[e10] = -1;

  vector<Edge> tree_edge_vec(5);

  //Test with a edge map and inserter.

  check(kruskal(G, edge_cost_map,

                 tree_edge_vec.begin())

        ==-31,

        "Total cost should be -31.");

  tree_edge_vec.clear();

  check(kruskal(G, edge_cost_map,

                back_inserter(tree_edge_vec))

        ==-31,

        "Total cost should be -31.");

//   tree_edge_vec.clear();

//   //The above test could also be coded like this:

//   check(kruskal(G,

//                 makeKruskalMapInput(G, edge_cost_map),

//                 makeKruskalSequenceOutput(back_inserter(tree_edge_vec)))

//         ==-31,

//         "Total cost should be -31.");

  check(tree_edge_vec.size()==5,"The tree should have 5 edges.");

  check(tree_edge_vec[0]==e1 &&

        tree_edge_vec[1]==e2 &&

        tree_edge_vec[2]==e5 &&

        tree_edge_vec[3]==e7 &&

        tree_edge_vec[4]==e9,

        "Wrong tree.");

  return 0;

}