// ==========================================================================
//                 SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2026, Knut Reinert, FU Berlin
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of Knut Reinert or the FU Berlin nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL KNUT REINERT OR THE FU BERLIN BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
//
// ==========================================================================
// Author: Rene Rahn <rene.rahn@fu-berlin.de>
// ==========================================================================

#ifndef INCLUDE_SEQAN_JOURNALED_STRING_TREE_JOURNALED_STRING_TREE_TRAVERSER_NODE_H_
#define INCLUDE_SEQAN_JOURNALED_STRING_TREE_JOURNALED_STRING_TREE_TRAVERSER_NODE_H_

namespace seqan2
{

// ============================================================================
// Forwards
// ============================================================================

// ============================================================================
// Tags, Classes, Enums
// ============================================================================

// TODO(rrahn): Redesign interface.
template <typename TJst>
class JstTraversalNode
{
public:
    typedef typename Member<TJst, JstSourceMember>::Type                TSequence;
    typedef typename Iterator<TSequence, Standard>::Type                TSeqIterator;
    typedef typename Position<TSequence>::Type                          TPosition;
    typedef typename MakeSigned<TPosition>::Type                        TSignedPos;
    typedef typename Member<TJst, JstDeltaMapMember>::Type              TDeltaMap;
    typedef typename Iterator<TDeltaMap, Standard>::Type                TDeltaIterator;
    typedef typename DeltaCoverage<TDeltaMap>::Type                     TCoverage;
    typedef typename Size<TJst>::Type                                   TSize;

    // __ Mapping Resources ___________________________________________________

    TSignedPos          headSrcPos;     // Head of the context pointing into base sequence. Can be negative in the initialization phase.
    TSize               remainingSize;
    TSize               proxyId;
    TDeltaIterator      headDelta;      // Iterator to first delta in context.
    TDeltaIterator      branchRoot;     // Iterator to root of current branch.

    // __ Navigation Resources ________________________________________________

    TDeltaIterator      curDelta;       // current delta iterator.
    TDeltaIterator      nextDelta;
    TSeqIterator        begEdgeIt;      // Current iterator of this edge.
    TSeqIterator        curEdgeIt;      // Current iterator of this edge.
    TSeqIterator        endEdgeIt;      // End of this edge.
    TCoverage           coverage;       // Coverage of this node.

    bool                isBase;
};

// ============================================================================
// Metafunctions
// ============================================================================

// ============================================================================
// Functions
// ============================================================================

template <typename TJstLhs, typename TJstRhs>
inline void
swap(JstTraversalNode<TJstLhs> & lhs,
     JstTraversalNode<TJstRhs> & rhs)
{
    std::swap(lhs.remainingSize, rhs.remainingSize);
    std::swap(lhs.headSrcPos, rhs.headSrcPos);
    std::swap(lhs.proxyId, rhs.proxyId);
    std::swap(lhs.headDelta, rhs.headDelta);
    std::swap(lhs.branchRoot, rhs.branchRoot);
    std::swap(lhs.curDelta, rhs.curDelta);
    std::swap(lhs.nextDelta, rhs.nextDelta);
    std::swap(lhs.begEdgeIt, rhs.begEdgeIt);
    std::swap(lhs.curEdgeIt, rhs.curEdgeIt);
    std::swap(lhs.endEdgeIt, rhs.endEdgeIt);
    swap(lhs.coverage, rhs.coverage);
    std::swap(lhs.isBase, rhs.isBase);
}

template <typename TStream, typename TJst>
inline TStream&
operator<<(TStream & stream, JstTraversalNode<TJst> const & node)
{
    stream << "<HEA: " << node.headSrcPos;
    stream << " REM: " << node.remainingSize;
    stream << " CUR: (" << *node.curDelta << ")";
    stream << " NXT: (" << *node.nextDelta << ")";
    stream << " SEQ: " << infix(container(node.begEdgeIt), position(node.begEdgeIt), position(node.endEdgeIt));
    stream << " POS: " << position(node.curEdgeIt) - position(node.begEdgeIt);
    stream << " PID: " << node.proxyId;
    stream << " COV: " << _printCoverage(node.coverage);
    if (node.isBase)
        stream << " Base: true";
    else
        stream << " Base: false";
    stream << ">";
    return stream;
}

}

#endif  // #ifndef INCLUDE_SEQAN_JOURNALED_STRING_TREE_JOURNALED_STRING_TREE_TRAVERSER_NODE_H_
