//
// Test Suite for geos::operation::linemerge::LineSequencer class.

// tut
#include <tut/tut.hpp>
// geos
#include <geos/operation/linemerge/LineSequencer.h>
#include <geos/constants.h>
#include <geos/geom/GeometryFactory.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/LineString.h>
#include <geos/io/WKTReader.h>
#include <geos/io/WKTWriter.h>
#include <geos/util/IllegalArgumentException.h>
// std
#include <memory>
#include <string>
#include <vector>

namespace tut {
//
// Test Group
//

// Common data used by tests
struct test_linesequencer_data {
    typedef geos::operation::linemerge::LineSequencer LineSequencer;
    typedef std::vector<geos::geom::Geometry*> GeomVect;
    typedef std::vector<geos::geom::LineString*> LineVect;

    geos::io::WKTReader wktreader;
    geos::io::WKTWriter wktwriter;

    typedef geos::geom::Geometry Geom;
    typedef geos::geom::Geometry::Ptr GeomPtr;

    GeomVect inpGeoms;

    test_linesequencer_data()
        : wktreader(), wktwriter()
    {
    }

    ~test_linesequencer_data()
    {
        delAll(inpGeoms);
    }

    GeomPtr
    readWKT(const std::string& inputWKT)
    {
        return GeomPtr(wktreader.read(inputWKT));
    }

    void
    readWKT(const char* const* inputWKT, std::vector<Geom*>& geoms)
    {
        for(const char* const* ptr = inputWKT; *ptr; ++ptr) {
            geoms.push_back(readWKT(*ptr).release());
        }
    }

    void
    runLineSequencer(const char* const* inputWKT,
                     const std::string& expectedWKT)
    {
        readWKT(inputWKT, inpGeoms);

        LineSequencer sequencer;
        sequencer.add(inpGeoms);

        if(! sequencer.isSequenceable()) {
            ensure(expectedWKT.empty());
        }
        else {
            GeomPtr expected = readWKT(expectedWKT);
            GeomPtr result(sequencer.getSequencedLineStrings());
            ensure(expected->equalsExact(result.get()));

            bool isSequenced = LineSequencer::isSequenced(result.get());
            ensure(isSequenced);
        }
    }

    void
    runIsSequenced(const std::string& inputWKT, bool exp)
    {
        GeomPtr g = readWKT(inputWKT);
        bool isSequenced = LineSequencer::isSequenced(g.get());
        ensure_equals(isSequenced, exp);
    }

    template <class TargetContainer>
    void
    delAll(TargetContainer& geoms)
    {
        for(typename TargetContainer::const_iterator i = geoms.begin(),
                e = geoms.end(); i != e; ++i) {
            Geom* g = dynamic_cast<Geom*>(*i);
            delete g;
        }
    }


private:
    // noncopyable
    test_linesequencer_data(test_linesequencer_data const& other) = delete;
    test_linesequencer_data& operator=(test_linesequencer_data const& rhs) = delete;
};

typedef test_group<test_linesequencer_data> group;
typedef group::object object;

group test_linesequencer_group("geos::operation::linemerge::LineSequencer");

//
// Test Cases
//

// testSimple
template<> template<>
void object::test<1>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 20, 0 30 )",
        "LINESTRING ( 0 10, 0 20 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 0 20), (0 20, 0 30))";

    runLineSequencer(inpWKT, expWKT);
}

// testSimpleLoop
template<> template<>
void object::test<2>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 0 0 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 0 0))";
    runLineSequencer(inpWKT, expWKT);
}

// testSimpleBigLoop
template<> template<>
void object::test<3>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 20, 0 30 )",
        "LINESTRING ( 0 30, 0 00 )",
        "LINESTRING ( 0 10, 0 20 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 0 20), (0 20, 0 30), (0 30, 0 0))";
    runLineSequencer(inpWKT, expWKT);
}

// test2SimpleLoops
template<> template<>
void object::test<4>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 0 0 )",
        "LINESTRING ( 0 0, 0 20 )",
        "LINESTRING ( 0 20, 0 0 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 10, 0 0), (0 0, 0 20), (0 20, 0 0), (0 0, 0 10))";
    runLineSequencer(inpWKT, expWKT);
}

// testWide8WithTail
template<> template<>
void object::test<5>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 10 0, 10 10 )",
        "LINESTRING ( 0 0, 10 0 )",
        "LINESTRING ( 0 10, 10 10 )",
        "LINESTRING ( 0 10, 0 20 )",
        "LINESTRING ( 10 10, 10 20 )",
        "LINESTRING ( 0 20, 10 20 )",

        "LINESTRING ( 10 20, 30 30 )",
        nullptr
    };
    const char* expWKT = "";
    runLineSequencer(inpWKT, expWKT);
}

// testSimpleLoopWithTail
template<> template<>
void object::test<6>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 10 10 )",
        "LINESTRING ( 10 10, 10 20, 0 10 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 10 10), (10 10, 10 20, 0 10))";
    runLineSequencer(inpWKT, expWKT);
}

// testLineWithRing
template<> template<>
void object::test<7>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 10 10, 10 20, 0 10 )",
        "LINESTRING ( 0 30, 0 20 )",
        "LINESTRING ( 0 20, 0 10 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 10 10, 10 20, 0 10), (0 10, 0 20), (0 20, 0 30))";
    runLineSequencer(inpWKT, expWKT);
}

// testMultipleGraphsWithRing
template<> template<>
void object::test<8>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 10 10, 10 20, 0 10 )",
        "LINESTRING ( 0 30, 0 20 )",
        "LINESTRING ( 0 20, 0 10 )",
        "LINESTRING ( 0 60, 0 50 )",
        "LINESTRING ( 0 40, 0 50 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 10 10, 10 20, 0 10), (0 10, 0 20), (0 20, 0 30), (0 40, 0 50), (0 50, 0 60))";
    runLineSequencer(inpWKT, expWKT);
}

// testMultipleGraphsWithMultipeRings
template<> template<>
void object::test<9>
()
{
    const char* inpWKT[] = {
        "LINESTRING ( 0 0, 0 10 )",
        "LINESTRING ( 0 10, 10 10, 10 20, 0 10 )",
        "LINESTRING ( 0 10, 40 40, 40 20, 0 10 )",
        "LINESTRING ( 0 30, 0 20 )",
        "LINESTRING ( 0 20, 0 10 )",
        "LINESTRING ( 0 60, 0 50 )",
        "LINESTRING ( 0 40, 0 50 )",
        nullptr
    };
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 10), (0 10, 40 40, 40 20, 0 10), (0 10, 10 10, 10 20, 0 10), (0 10, 0 20), (0 20, 0 30), (0 40, 0 50), (0 50, 0 60))";

    runLineSequencer(inpWKT, expWKT);
}

// testLineSequence
template<> template<>
void object::test<10>
()
{
    const char* expWKT = "LINESTRING ( 0 0, 0 10 )";
    runIsSequenced(expWKT, true);
}

// testSplitLineSequence
template<> template<>
void object::test<11>
()
{
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 1), (0 2, 0 3), (0 3, 0 4) )";
    runIsSequenced(expWKT, true);
}

// testBadLineSequence
template<> template<>
void object::test<12>
()
{
    const char* expWKT =
        "MULTILINESTRING ((0 0, 0 1), (0 2, 0 3), (0 1, 0 4) )";
    runIsSequenced(expWKT, false);
}


} // namespace tut