=head1 LICENSE

Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
Copyright [2016-2020] EMBL-European Bioinformatics Institute

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

=cut


=head1 CONTACT

  Please email comments or questions to the public Ensembl
  developers list at <http://lists.ensembl.org/mailman/listinfo/dev>.

  Questions may also be sent to the Ensembl help desk at
  <http://www.ensembl.org/Help/Contact>.

=cut


package Bio::EnsEMBL::Utils::Converter::bio_ens_hsp;

use strict;
use vars qw(@ISA);
use Bio::EnsEMBL::Utils::Converter::bio_ens;
use Bio::EnsEMBL::ProteinFeature;

@ISA = qw(Bio::EnsEMBL::Utils::Converter::bio_ens);

sub _initialize {
    my ($self, @args) = @_;
    $self->SUPER::_initialize(@args);

    # After super initialized, analysis and contig are ready.
    my $bio_ens_seqFeature_converter = new Bio::EnsEMBL::Utils::Converter(
        -in => 'Bio::SeqFeature::Generic',
        -out => 'Bio::EnsEMBL::SeqFeature',
        -analysis => $self->analysis,
        -contig => $self->contig
    );
    $self->_bio_ens_seqFeature_converter($bio_ens_seqFeature_converter);

}

sub _convert_single {
    my ($self, $hsp) = @_;

    unless(ref($hsp) && $hsp->isa('Bio::Search::HSP::GenericHSP')){
        $self->throw("a GenericHSP object needed");
    }
    
    my $in = $self->in;
    my $out = $self->out;

    if($out =~ /^Bio::EnsEMBL::ProteinFeature$/){
        return $self->_convert_single_to_proteinFeature($hsp);
    }elsif($out =~/^Bio::EnsEMBL::(DnaDna|DnaPep|PepDna)AlignFeature/){
        return $self->_convert_single_to_alignFeature($hsp);
    }else{
        $self->throw("[$in]->[$out], not implemented");
    }
}

sub _convert_single_to_featurePair {
    my ($self, $hsp) = @_;
    
    my $bio_ens_seqFeature_converter = $self->_bio_ens_seqFeature_converter;
    my $ens_feature1 = $bio_ens_seqFeature_converter->_convert_single(
        $hsp->feature1);
    my $ens_feature2 = $bio_ens_seqFeature_converter->_convert_single(
        $hsp->feature2);

    $ens_feature1->p_value($hsp->evalue);
    $ens_feature1->score($hsp->score);
    $ens_feature1->percent_id($hsp->percent_identity);
    $ens_feature2->p_value($hsp->evalue);
    $ens_feature2->score($hsp->score);
    $ens_feature2->percent_id($hsp->percent_identity);

    my $featurePair = Bio::EnsEMBL::FeaturePair->new(
        -feature1 => $ens_feature1,
        -feature2 => $ens_feature2
    );

    return $featurePair;
}

sub _convert_single_to_proteinFeature {
    my ($self, $hsp) = @_;
    
    my $ens_featurePair = $self->_convert_single_to_featurePair($hsp);
    my $ens_proteinFeature = Bio::EnsEMBL::ProteinFeature->new(
        -feature1 => $ens_featurePair->feature1,
        -feature2 => $ens_featurePair->feature2
    );
    $ens_proteinFeature->seqname($self->translation_id);
    return $ens_proteinFeature;
}

sub _convert_single_to_alignFeature {
    my ($self, $hsp) = @_;
    my $ens_featurePair = $self->_convert_single_to_featurePair($hsp);
    my $cigar_string = $hsp->cigar_string;
    my @args = (
        -feature1 => $ens_featurePair->feature1,
        -feature2 => $ens_featurePair->feature2,
        -cigar_string => $hsp->cigar_string
    );
    my $contig = $self->contig;
    # choose the AlignFeature based on the blast program
    my $program = $hsp->algorithm;

    $self->throw("HSP does not have algorithm value") unless(defined($program));
    my $align_feature;
    if($program =~ /blastn/i){
        $align_feature = new Bio::EnsEMBL::DnaDnaAlignFeature(@args);
#        $align_feature->attach_seq($contig);
    }elsif($program =~ /blastx/i){
        $align_feature = new Bio::EnsEMBL::DnaPepAlignFeature(@args);
#        $align_feature->attach_seq($contig);
    }else{
        $self->throw("\[$program\] is not supported yet");
    }
    return $align_feature;
}

sub _bio_ens_seqFeature_converter {
    my ($self) = shift ;
    return $self->{_bio_ens_seqFeature_converter} = shift if(@_);
    return $self->{_bio_ens_seqFeature_converter};
}
1;
