# $Id: ModelResult.pm,v 1.2 2003/09/08 12:17:15 heikki Exp $
#
# BioPerl module for Bio::Tools::Phylo::PAML::ModelResult
#
# Cared for by Jason Stajich <jason@open-bio.org>
#
# Copyright Jason Stajich
#
# You may distribute this module under the same terms as perl itself

# POD documentation - main docs before the code

=head1 NAME

Bio::Tools::Phylo::PAML::ModelResult - A container for NSSite Model Result from PAML 

=head1 SYNOPSIS

  # get a ModelResult from a PAML::Result object
  use Bio::Tools::Phylo::PAML;
  my $paml = new Bio::Tools::Phylo::PAML(-file => 'mlc');
  my $result = $paml->next_result;
  foreach my $model ( $result->get_model_results ) {
    print $model->model_num, " ", $mode->model_description, "\n";
    print $model->kappa, "\n";
    print $model->run_time, "\n";
  }

=head1 DESCRIPTION

Describe the object here

=head1 FEEDBACK

=head2 Mailing Lists

User feedback is an integral part of the evolution of this and other
Bioperl modules. Send your comments and suggestions preferably to
the Bioperl mailing list.  Your participation is much appreciated.

  bioperl-l@bioperl.org              - General discussion
  http://bioperl.org/MailList.shtml  - About the mailing lists

=head2 Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track
of the bugs and their resolution. Bug reports can be submitted via
email or the web:

  http://bugzilla.bioperl.org/

=head1 AUTHOR - Jason Stajich

Email jason@open-bio.org

Describe contact details here

=head1 CONTRIBUTORS

Additional contributors names and emails here

=head1 APPENDIX

The rest of the documentation details each of the object methods.
Internal methods are usually preceded with a _

=cut


# Let the code begin...


package Bio::Tools::Phylo::PAML::ModelResult;
use vars qw(@ISA);
use strict;

# Object preamble - inherits from Bio::Root::Root

use Bio::Root::Root;

@ISA = qw(Bio::Root::Root );

=head2 new

 Title   : new
 Usage   : my $obj = new Bio::Tools::Phylo::PAML::ModelResult();
 Function: Builds  a new Bio::Tools::Phylo::PAML::ModelResult object 
 Returns : an instance of Bio::Tools::Phylo::PAML::ModelResult
 Args    : -model_num           => model number
           -model_description   => model description
           -kappa               => value of kappa
           -time_used           => amount of time
           -pos_sites           => arrayref of sites under positive selection
           -trees               => arrayref of tree(s) data for this model
           -shape_params        => hashref of parameters 
                                   ('shape' => 'alpha',
				    'gamma' => $g, 
				    'r' => $r, 
				    'f' => $f 
				    )
                                    OR
				    ( 'shape' => 'beta',
				      'p' => $p, 
				      'q' => $q
				     )
           -likelihood          => likelihood
           -num_site_classes    => number of site classes
           -dnds_site_classes   => hashref with two keys, 'p' and 'w'
                                   which each point to an array, each
                                   slot is for a different site class.
                                   'w' is for dN/dS and 'p' is probability

=cut

sub new {
  my($class,@args) = @_;

  my $self = $class->SUPER::new(@args);
  my ($modelnum,$modeldesc,$kappa,
      $timeused,$trees,
      $pos_sites,
      $num_site_classes, $shape_params,
      $dnds_classes,
      $likelihood) =          $self->_rearrange([qw(MODEL_NUM 
						      MODEL_DESCRIPTION
						      KAPPA
						      TIME_USED
						      TREES
						      POS_SITES
						      NUM_SITE_CLASSES
						      SHAPE_PARAMS
						      DNDS_SITE_CLASSES
						      LIKELIHOOD)],
						 @args);
  if( $trees ) {
      if(ref($trees) !~ /ARRAY/i ) { 
	  $self->warn("Must have provided a valid array reference to initialize trees");
      } else { 
	  foreach my $t ( @$trees ) {
	      $self->add_tree($t);
	  }
      }
  }
  $self->{'_treeiterator'} = 0;
  if( $pos_sites ) {
      if(ref($pos_sites) !~ /ARRAY/i ) { 
	  $self->warn("Must have provided a valid array reference to initialize pos_sites");
      } else { 
	  foreach my $s ( @$pos_sites ) {
	      if( ref($s) !~ /ARRAY/i ) {
		  $self->warn("need an array ref for each entry in the pos_sites object");
		  next;
	      }
	      $self->add_pos_selected_site(@$s);
	  }
      }
  }
  defined $modelnum  && $self->model_num($modelnum);
  defined $modeldesc && $self->model_description($modeldesc);
  defined $kappa     && $self->kappa($kappa);
  defined $timeused  && $self->time_used($timeused);
  defined $likelihood  && $self->likelihood($likelihood);

  $self->num_site_classes($num_site_classes || 0);
  if( defined $dnds_classes ) {
      if( ref($dnds_classes) !~ /HASH/i || 
	  ! defined $dnds_classes->{'p'} || 
	  ! defined $dnds_classes->{'w'} ) {
	  $self->warn("-dnds_site_classes expects a hashref with keys p and w");
      } else {
	  $self->dnds_site_classes($dnds_classes);
      }
  }
  if( defined $shape_params ) {
      if( ref($shape_params) !~ /HASH/i ) {
	  $self->warn("-shape_params expects a hashref not $shape_params\n");
      } else {
	  $self->shape_params($shape_params);
      }
  }
  return $self;
}


=head2 model_num

 Title   : model_num
 Usage   : $obj->model_num($newval)
 Function: Get/Set the Model number (0,1,2,3...)
 Returns : value of model_num (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub model_num {
    my $self = shift;
    return $self->{'_num'} = shift if @_;
    return $self->{'_num'};
}

=head2 model_description

 Title   : model_description
 Usage   : $obj->model_description($newval)
 Function: Get/Set the model description
           This is something like 'one-ratio', 'neutral', 'selection'
 Returns : value of description (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub model_description{
    my $self = shift;
    return $self->{'_model_description'} = shift if @_;
    return $self->{'_model_description'};
}

=head2 time_used

 Title   : time_used
 Usage   : $obj->time_used($newval)
 Function: Get/Set the time it took to run this analysis
 Returns : value of time_used (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub time_used{
    my $self = shift;
    return $self->{'_time_used'} = shift if @_;
    return $self->{'_time_used'};
}

=head2 kappa

 Title   : kappa
 Usage   : $obj->kappa($newval)
 Function: Get/Set kappa (ts/tv)
 Returns : value of kappa (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub kappa{
    my $self = shift;
    return $self->{'_kappa'} = shift if @_;
    return $self->{'_kappa'};
}

=head2 num_site_classes

 Title   : num_site_classes
 Usage   : $obj->num_site_classes($newval)
 Function: Get/Set the number of site classes for this model
 Returns : value of num_site_classes (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub num_site_classes{
    my $self = shift;
    return $self->{'_num_site_classes'} = shift if @_;
    return $self->{'_num_site_classes'};
}

=head2 dnds_site_classes

 Title   : dnds_site_classes
 Usage   : $obj->dnds_site_classes($newval)
 Function: Get/Set dN/dS site classes, a hashref
           with 2 keys, 'p' and 'w' which point to arrays
           one slot for each site class.
 Returns : value of dnds_site_classes (a hashref)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub dnds_site_classes{
    my $self = shift;
    return $self->{'_dnds_site_classes'} = shift if @_;
    return $self->{'_dnds_site_classes'};
}

=head2 get_pos_selected_sites

 Title   : get_pos_selected_sites
 Usage   : my @sites = $modelresult->get_pos_selected_sites();
 Function: Get the sites which PAML has identified as under positive
           selection (w > 1).  This returns an array with each slot
           being a site, 4 values, 
           site location (in the original alignment)
           Amino acid    (I *think* in the first sequence)
           P             (P value)
           Significance  (** indicated >= 99%, * indicates >=95%)
 Returns : Array
 Args    : none


=cut

sub get_pos_selected_sites{
   return @{$_[0]->{'_posselsites'}};
}

=head2 add_pos_selected_site

 Title   : add_pos_selected_site
 Usage   : $result->add_pos_selected_site($site,$aa,$pvalue,$signif);
 Function: Add a site to the list of positively selected sites
 Returns : count of the number of sites stored
 Args    : $site   - site number (in the alignment)
           $aa     - amino acid under selection 
           $pvalue - float from 0->1 represent probability site is under selection according to this model
           $signif - significance (coded as either empty, '*', or '**'

=cut

sub add_pos_selected_site{
   my ($self,$site,$aa,$pvalue,$signif) = @_;
   push @{$self->{'_posselsites'}}, [ $site,$aa,$pvalue,$signif ];
   return scalar @{$self->{'_posselsites'}};
}


=head2 next_tree

 Title   : next_tree
 Usage   : my $tree = $factory->next_tree;
 Function: Get the next tree from the factory
 Returns : L<Bio::Tree::TreeI>
 Args    : none

=cut

sub next_tree{
   my ($self,@args) = @_;
   return $self->{'_trees'}->[$self->{'_treeiterator'}++] || undef;
}

=head2 get_trees

 Title   : get_trees
 Usage   : my @trees = $result->get_trees;
 Function: Get all the parsed trees as an array
 Returns : Array of trees
 Args    : none


=cut

sub get_trees{
   my ($self) = @_;
   return @{$self->{'_trees'} || []};
}

=head2 rewind_tree

 Title   : rewind_tree_iterator
 Usage   : $result->rewind_tree()
 Function: Rewinds the tree iterator so that next_tree can be 
           called again from the beginning
 Returns : none
 Args    : none

=cut

sub rewind_tree_iterator {
    shift->{'_treeiterator'} = 0;
}

=head2 add_tree

 Title   : add_tree
 Usage   : $result->add_tree($tree);
 Function: Adds a tree 
 Returns : integer which is the number of trees stored
 Args    : L<Bio::Tree::TreeI>

=cut

sub add_tree{
   my ($self,$tree) = @_;
   if( $tree && ref($tree) && $tree->isa('Bio::Tree::TreeI') ) {
       push @{$self->{'_trees'}},$tree;
   }
   return scalar @{$self->{'_trees'}};
}

=head2 shape_params

 Title   : shape_params
 Usage   : $obj->shape_params($newval)
 Function: Get/Set shape params for the distribution, 'alpha', 'beta'
           which is a hashref 
           with 1 keys, 'p' and 'q' 
 Returns : value of shape_params (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub shape_params{
    my $self = shift;
    return $self->{'_shape_params'} = shift if @_;
    return $self->{'_shape_params'};
}

=head2 likelihood

 Title   : likelihood
 Usage   : $obj->likelihood($newval)
 Function: log likelihood
 Returns : value of likelihood (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


=cut

sub likelihood{
    my $self = shift;
    return $self->{'likelihood'} = shift if @_;
    return $self->{'likelihood'};
}

1;
