// ==========================================================================
//                 SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2016, Knut Reinert, FU Berlin
// All rights reserved.
//
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// DAMAGE.
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// ==========================================================================
// Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
// ==========================================================================
// Interface functions for banded local alignment.
// ==========================================================================

#ifndef SEQAN_INCLUDE_SEQAN_ALIGN_LOCAL_ALIGNMENT_BANDED_H_
#define SEQAN_INCLUDE_SEQAN_ALIGN_LOCAL_ALIGNMENT_BANDED_H_

namespace seqan {

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

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

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

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

// ----------------------------------------------------------------------------
// Function localAlignment()                                    [banded, Align]
// ----------------------------------------------------------------------------

template <typename TSequence, typename TAlignSpec, typename TScoreValue, typename TScoreSpec, typename TTag>
TScoreValue localAlignment(Align<TSequence, TAlignSpec> & align,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag,
                           TTag const & tag)
{
    typedef Align<TSequence, TAlignSpec> TAlign;
    typedef typename Size<TAlign>::Type TSize;
    typedef typename Position<TAlign>::Type TPosition;
    typedef TraceSegment_<TPosition, TSize> TTraceSegment;
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<> > TAlignConfig2;

    SEQAN_ASSERT_EQ(length(rows(align)), 2u);

    String<TTraceSegment> trace;
    DPScoutState_<Default> dpScoutState;
    TScoreValue res = _setUpAndRunAlignment(trace, dpScoutState, source(row(align, 0)), source(row(align, 1)),
                                            scoringScheme, TAlignConfig2(lowerDiag, upperDiag), tag);

    _adaptTraceSegmentsTo(row(align, 0), row(align, 1), trace);
    return res;
}

template <typename TSequence, typename TAlignSpec, typename TScoreValue, typename TScoreSpec>
TScoreValue localAlignment(Align<TSequence, TAlignSpec> & align,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag)
{
    SEQAN_ASSERT(length(rows(align)) == 2u);
    if (_usesAffineGaps(scoringScheme, source(row(align, 0)), source(row(align, 1))))
        return localAlignment(align, scoringScheme, lowerDiag, upperDiag, AffineGaps());
    else
        return localAlignment(align, scoringScheme, lowerDiag, upperDiag, LinearGaps());
}

// ----------------------------------------------------------------------------
// Function localAlignment()                                     [banded, Gaps]
// ----------------------------------------------------------------------------

template <typename TSequenceH, typename TGapsSpecH, typename TSequenceV, typename TGapsSpecV,
          typename TScoreValue, typename TScoreSpec, typename TTag>
TScoreValue localAlignment(Gaps<TSequenceH, TGapsSpecH> & gapsH,
                           Gaps<TSequenceV, TGapsSpecV> & gapsV,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag,
                           TTag const & tag)
{
    typedef typename Size<TSequenceH>::Type TSize;
    typedef typename Position<TSequenceH>::Type TPosition;
    typedef TraceSegment_<TPosition, TSize> TTraceSegment;
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<> > TAlignConfig2;

    String<TTraceSegment> trace;
    DPScoutState_<Default> dpScoutState;
    TScoreValue res = _setUpAndRunAlignment(trace, dpScoutState, source(gapsH), source(gapsV), scoringScheme,
                                            TAlignConfig2(lowerDiag, upperDiag), tag);
    _adaptTraceSegmentsTo(gapsH, gapsV, trace);
    return res;
}

template <typename TSequenceH, typename TGapsSpecH, typename TSequenceV, typename TGapsSpecV,
          typename TScoreValue, typename TScoreSpec>
TScoreValue localAlignment(Gaps<TSequenceH, TGapsSpecH> & gapsH,
                           Gaps<TSequenceV, TGapsSpecV> & gapsV,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag)
{
    if (_usesAffineGaps(scoringScheme, source(gapsH), source(gapsV)))
        return localAlignment(gapsH, gapsV, scoringScheme, lowerDiag, upperDiag, AffineGaps());
    else
        return localAlignment(gapsH, gapsV, scoringScheme, lowerDiag, upperDiag, LinearGaps());
}

// ----------------------------------------------------------------------------
// Function localAlignment()                      [banded, Graph<Alignment<> >]
// ----------------------------------------------------------------------------

template <typename TStringSet, typename TCargo, typename TGraphSpec, typename TScoreValue, typename TScoreSpec,
          typename TTag>
TScoreValue localAlignment(Graph<Alignment<TStringSet, TCargo, TGraphSpec> > & alignmentGraph,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag,
                           TTag const & tag)
{
    typedef Graph<Alignment<TStringSet, TCargo, TGraphSpec> > TGraph;
    typedef typename Size<TGraph>::Type TSize;
    typedef typename Position<TGraph>::Type TPosition;
    typedef TraceSegment_<TPosition, TSize> TTraceSegment;
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<> > TAlignConfig2;

    String<TTraceSegment> trace;
    DPScoutState_<Default> dpScoutState;
    TScoreValue res = _setUpAndRunAlignment(trace, dpScoutState, value(stringSet(alignmentGraph), 0),
                                            value(stringSet(alignmentGraph), 1), scoringScheme,
                                            TAlignConfig2(lowerDiag, upperDiag), tag);

    _adaptTraceSegmentsTo(alignmentGraph, positionToId(stringSet(alignmentGraph), 0),
                          positionToId(stringSet(alignmentGraph), 1), trace);
    return res;
}

template <typename TStringSet, typename TCargo, typename TGraphSpec,
          typename TScoreValue, typename TScoreSpec>
TScoreValue localAlignment(Graph<Alignment<TStringSet, TCargo, TGraphSpec> > & alignmentGraph,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag)
{
    SEQAN_ASSERT(length(stringSet(alignmentGraph)) == 2u);

    if (_usesAffineGaps(scoringScheme, stringSet(alignmentGraph)[0], stringSet(alignmentGraph)[1]))
        return localAlignment(alignmentGraph, scoringScheme, lowerDiag, upperDiag, AffineGaps());
    else
        return localAlignment(alignmentGraph, scoringScheme, lowerDiag, upperDiag, LinearGaps());
}

// ----------------------------------------------------------------------------
// Function localAlignment()                      [banded, String<Fragment<> >]
// ----------------------------------------------------------------------------

// Full interface.
template <typename TSize, typename TFragmentSpec, typename TStringSpec, typename TSequence, typename TStringSetSpec,
          typename TScoreValue, typename TScoreSpec, typename TTag>
TScoreValue localAlignment(String<Fragment<TSize, TFragmentSpec>, TStringSpec> & fragmentString,
                           StringSet<TSequence, TStringSetSpec> const & strings,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag,
                           TTag const & tag)
{
    typedef String<Fragment<TSize, TFragmentSpec>, TStringSpec> TFragments;
    typedef typename Position<TFragments>::Type TPosition;
    typedef TraceSegment_<TPosition, TSize> TTraceSegment;
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<> > TAlignConfig2;

    String<TTraceSegment> trace;
    DPScoutState_<Default> dpScoutState;
    TScoreValue res = _setUpAndRunAlignment(trace, dpScoutState, value(strings, 0), value(strings, 1), scoringScheme,
                                            TAlignConfig2(lowerDiag, upperDiag), tag);
    _adaptTraceSegmentsTo(fragmentString, positionToId(strings, 0), positionToId(strings, 1), trace);
    return res;
}

template <typename TSize, typename TFragmentSpec, typename TStringSpec,
          typename TSequence, typename TStringSetSpec,
          typename TScoreValue, typename TScoreSpec>
TScoreValue localAlignment(String<Fragment<TSize, TFragmentSpec>, TStringSpec> & fragmentString,
                           StringSet<TSequence, TStringSetSpec> const & strings,
                           Score<TScoreValue, TScoreSpec> const & scoringScheme,
                           int lowerDiag,
                           int upperDiag)
{
    SEQAN_ASSERT(length(strings) == 2u);

    if (_usesAffineGaps(scoringScheme, strings[0], strings[1]))
        return localAlignment(fragmentString, strings, scoringScheme, lowerDiag, upperDiag, AffineGaps());
    else
        return localAlignment(fragmentString, strings, scoringScheme, lowerDiag, upperDiag, LinearGaps());
}

// ============================================================================
// Many-vs-Many align interfaces.
// ============================================================================

// ----------------------------------------------------------------------------
// Function localAlignment()               [banded, SIMD version, GapsH, GapsV]
// ----------------------------------------------------------------------------

template <typename TGapSequenceH, typename TSetSpecH,
          typename TGapSequenceV, typename TSetSpecV,
          typename TScoreValue, typename TScoreSpec,
          typename TAlgoTag>
inline auto
localAlignment(StringSet<TGapSequenceH, TSetSpecH> & gapSeqSetH,
               StringSet<TGapSequenceV, TSetSpecV> & gapSeqSetV,
               Score<TScoreValue, TScoreSpec> const & scoringScheme,
               int const lowerDiag,
               int const upperDiag,
               TAlgoTag const & /*algoTag*/)
{
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<> >    TAlignConfig2;
    typedef typename SubstituteAlgoTag_<TAlgoTag>::Type                     TGapModel;

    return _alignWrapper(gapSeqSetH, gapSeqSetV, scoringScheme, TAlignConfig2(lowerDiag, upperDiag), TGapModel());
}

// ----------------------------------------------------------------------------
// Function localAlignment()           [banded, SIMD version, StringSet<Align>]
// ----------------------------------------------------------------------------

template <typename TSequence, typename TAlignSpec, typename TSetSpec,
          typename TScoreValue, typename TScoreSpec,
          typename TAlgoTag>
inline String<TScoreValue>
localAlignment(StringSet<Align<TSequence, TAlignSpec>, TSetSpec> & alignSet,
               Score<TScoreValue, TScoreSpec> const & scoringScheme,
               int const lowerDiag,
               int const upperDiag,
               TAlgoTag const & algoTag)
{
    typedef Align<TSequence, TAlignSpec>    TAlign;
    typedef typename Row<TAlign>::Type      TGapSequence;

    StringSet<TGapSequence, Dependent<> > gapSetH;
    StringSet<TGapSequence, Dependent<> > gapSetV;
    reserve(gapSetH, length(alignSet));
    reserve(gapSetV, length(alignSet));

    for (auto & align : alignSet)
    {
        appendValue(gapSetH, row(align, 0));
        appendValue(gapSetV, row(align, 1));
    }

    return localAlignment(gapSetH, gapSetV, scoringScheme, lowerDiag, upperDiag, algoTag);
}

template <typename TSequence, typename TAlignSpec,
          typename TScoreValue, typename TScoreSpec>
String<TScoreValue> localAlignment(StringSet<Align<TSequence, TAlignSpec> > & align,
                                   Score<TScoreValue, TScoreSpec> const & scoringScheme,
                                   int lowerDiag, int upperDiag)
{
   if (_usesAffineGaps(scoringScheme, source(row(align[0], 0)), source(row(align[0], 1))))
        return localAlignment(align, scoringScheme, lowerDiag, upperDiag, AffineGaps());
   else
        return localAlignment(align, scoringScheme, lowerDiag, upperDiag, LinearGaps());
}

// ----------------------------------------------------------------------------
// Function localAlignmentScore()                  [banded, no-simd, TSequence]
// ----------------------------------------------------------------------------

template <typename TSequenceH,
          typename TSequenceV,
          typename TScoreValue, typename TScoreSpec,
          typename TAlgoTag>
SEQAN_FUNC_DISABLE_IF(And<And<Is<ContainerConcept<TSequenceH>>, Is<ContainerConcept<typename Value<TSequenceH>::Type>>>,
                          And<Is<ContainerConcept<TSequenceV>>, Is<ContainerConcept<typename Value<TSequenceV>::Type>>>
                         >, TScoreValue)
localAlignmentScore(TSequenceH const & seqH,
                    TSequenceV const & seqV,
                    Score<TScoreValue, TScoreSpec> const & scoringScheme,
                    int const lowerDiag,
                    int const upperDiag,
                    TAlgoTag const & /*algoTag*/)
{
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<>, TracebackOff> TAlignConfig2;
    typedef typename SubstituteAlgoTag_<TAlgoTag>::Type TGapModel;

    DPScoutState_<Default> dpScoutState;
    String<TraceSegment_<unsigned, unsigned> > traceSegments;  // Dummy segments.
    return _setUpAndRunAlignment(traceSegments, dpScoutState, seqH, seqV, scoringScheme,
                                 TAlignConfig2{lowerDiag, upperDiag}, TGapModel{});
}

// ----------------------------------------------------------------------------
// Function localAlignmentScore()                     [banded, Simd, TSequence]
// ----------------------------------------------------------------------------

template <typename TSeqH,
          typename TSeqV,
          typename TScoreValue, typename TScoreSpec,
          typename TAlgoTag>
inline
SEQAN_FUNC_ENABLE_IF(And<And<Is<ContainerConcept<TSeqH>>, Is<ContainerConcept<typename Value<TSeqH>::Type>>>,
                         And<Is<ContainerConcept<TSeqV>>, Is<ContainerConcept<typename Value<TSeqV>::Type>>>
                        >, String<TScoreValue>)
localAlignmentScore(TSeqH const & stringsH,
                    TSeqV const & stringsV,
                    Score<TScoreValue, TScoreSpec> const & scoringScheme,
                    int const lowerDiag,
                    int const upperDiag,
                    TAlgoTag const & /*algoTag*/)
{
    typedef AlignConfig2<DPLocal, DPBandConfig<BandOn>, FreeEndGaps_<>, TracebackOff> TAlignConfig2;
    typedef typename SubstituteAlgoTag_<TAlgoTag>::Type TGapModel;

    SEQAN_ASSERT_EQ(length(stringsH), length(stringsV));
    return _alignWrapper(stringsH, stringsV, scoringScheme, TAlignConfig2{lowerDiag, upperDiag}, TGapModel());
}

// Interface without algorithm tag.
template <typename TSequenceH,
          typename TSequenceV,
          typename TScoreValue, typename TScoreSpec>
auto localAlignmentScore(TSequenceH const & seqH,
                         TSequenceV const & seqV,
                         Score<TScoreValue, TScoreSpec> const & scoringScheme,
                         int const lowerDiag,
                         int const upperDiag)
{
    if (scoreGapOpen(scoringScheme) == scoreGapExtend(scoringScheme))
        return localAlignmentScore(seqH, seqV, scoringScheme, lowerDiag, upperDiag, NeedlemanWunsch());
    else
        return localAlignmentScore(seqH, seqV, scoringScheme, lowerDiag, upperDiag, Gotoh());
}

}  // namespace seqan

#endif  // #ifndef SEQAN_INCLUDE_SEQAN_ALIGN_LOCAL_ALIGNMENT_BANDED_H_
