#!/usr/bin/perl
#
use Getopt::Std;
getopts("i:s:S:o:f:j:",\%opts);

my $input             = $opts{i}; $input   = "OTU.clstr" unless $input;
my $output            = $opts{o}; $output  = "OTU.txt" unless ($output);
my ($i, $j, $k, $str, $cmd, $ll);

my %count = ();
my %count_t = ();
my %count_s = ();
my $OTU_2_ann = ();
my $tree_flag = 0;  #### for greengene header format
# >4360486|k__Bacteria;.p__Firmicutes;.c__Clostridia;.o__Clostridiales;.f__Lachnospiraceae;.g__Roseburia;.s__faecis
open(TMP, $input) || die "can not open $input";
my $OTU=0;
while($ll=<TMP>){
  if ($ll =~ /^>/) {
    $OTU++;
  }
  else {
    chop($ll);
    if ($ll =~ /\d+(aa|nt), >(.+)\.\.\./) {
      my $id = $2;
      if ($id =~ /^Sample\|([^\|]+)\|/) {
        $sample_id = $1;
        $sample_id{$sample_id}=1;
        $count{$OTU}{$sample_id}++;
        $count_t{$OTU}++;
        $count_s{$sample_id}++;
      }
      else {
        $OTU_2_ann{$OTU} = $id;
        $tree_flag = 1 if ($id =~ /\|k__Bacteria;.p__/);
      }
    }
    else {
      die "format error $ll";
    }
  }
}
close(TMP);

my @sample_ids = sort keys %sample_id;

open(OUT1, "> $output") || die "can not write $output";
print OUT1 "OTU";
foreach $sample_id (@sample_ids){
  print OUT1 "\t$sample_id";
}
if ($tree_flag) {
  print OUT1 "\t", join("\t", qw/Kingdom Phylum Class Order Family Genus Species/);
}
#print OUT1 "\tTotal\n";
print OUT1 "\tAnnotation\n";

for ($i=1; $i<=$OTU; $i++){
  $ann = "None";
  if ($OTU_2_ann{$i}) { $ann = $OTU_2_ann{$i}; }
  print OUT1 "OTU$i";
  foreach $sample_id (@sample_ids){
    $k = $count{$i}{$sample_id}? $count{$i}{$sample_id} : 0;
    print OUT1 "\t$k";
  }
  if ($tree_flag) {
    my ($tax_k, $tax_p, $tax_c, $tax_o, $tax_f, $tax_g, $tax_s);
    if ($ann =~ /k__(\w+)/) {$tax_k = $1} else {$tax_k = "";}
    if ($ann =~ /p__(\w+)/) {$tax_p = $1} else {$tax_p = "";}
    if ($ann =~ /c__(\w+)/) {$tax_c = $1} else {$tax_c = "";}
    if ($ann =~ /o__(\w+)/) {$tax_o = $1} else {$tax_o = "";}
    if ($ann =~ /f__(\w+)/) {$tax_f = $1} else {$tax_f = "";}
    if ($ann =~ /g__(\w+)/) {$tax_g = $1} else {$tax_g = "";}
    if ($ann =~ /s__(\w+)/) {$tax_s = $1} else {$tax_s = "";}
    print OUT1 "\t", join("\t", ($tax_k, $tax_p, $tax_c, $tax_o, $tax_f, $tax_g, $tax_s));
  }
  #print OUT1 "\t$count_t{$i}";
  print OUT1 "\t$ann\n";
}
close(OUT1);