#!/usr/bin/perl
use strict;
use warnings;
use Getopt::Long;
use Parallel::ForkManager;
use File::Basename;
use File::Copy::Recursive qw( dircopy );
use POSIX;
use FindBin;
use lib $FindBin::Bin;
use resize qw ( size_distribution );
use subgroups qw (subgroups );
use ppp qw ( ping_pong_partners );
use Rcall qw (pie_chart bg_to_png );
use align qw ( to_build get_unique sam_count sam_count_mis sam_sorted_bam rpms_rpkm rpms_rpkm_te BWA_call get_fastq_seq extract_sam sam_to_bam_bg );
use html qw ( main_page details_pages menu_page ppp_page );
use File::Copy;

if(@ARGV) {
    my ( @fastq, @fastq_n, $dir, $min, $max, $mis, $misTE, $help, $Pcheck, $mapnumf, $html_out);
    my ( $ref, $tRNAs, $rRNAs, $snRNAs, $miRNAs, $transcripts, $TE );
    my ( $si_min, $si_max, $pi_min, $pi_max );
    my ( $build_index, $build_tRNAs, $build_rRNAs, $build_snRNAs, $build_miRNAs, $build_transcripts, $build_TE );
    my $max_procs = 8;
    
    ( $build_index, $build_tRNAs, $build_rRNAs, $build_snRNAs, $build_miRNAs, $build_transcripts, $build_TE ) = (0,0,0,0,0,0,0);
    ( $min, $max, $mis, $misTE, $si_min, $si_max, $pi_min, $pi_max, $dir ) = ( 18, 29, 0, 3, 21, 21, 23, 29 );
    $Pcheck ='true';
    
    GetOptions (
        "fastq=s" => \@fastq,
        "fastq_n=s" => \@fastq_n,
        "dir=s" => \$dir,
        "min:i" => \$min,
        "max:i" => \$max,
        "si_min:i" => \$si_min,
        "si_max:i" => \$si_max,
        "pi_min:i" => \$pi_min,
        "pi_max:i" => \$pi_max,
        "mis:i" => \$mis,
        "misTE:i" => \$misTE,
        "html:s" => \$html_out,
        "PPPon:s" => \$Pcheck,
        "help"   =>  \$help,
        "ref:s" => \$ref,
        "tRNAs:s" => \$tRNAs,
        "rRNAs:s" => \$rRNAs,
        "snRNAs:s" => \$snRNAs,
        "miRNAs:s" => \$miRNAs,
        "transcripts:s" => \$transcripts,
        "TE:s" => \$TE,
        "build_index" => \$build_index,
        "build_tRNAs" => \$build_tRNAs,
        "build_snRNAs" => \$build_snRNAs,
        "build_miRNAs" => \$build_miRNAs,
        "build_transcripts" => \$build_transcripts,
        "build_rRNAs" => \$build_rRNAs,
        "build_TE" => \$build_TE
    );
    
    my $fq_collection = 'fastq_dir/';
    mkdir $dir; mkdir $fq_collection;
    $dir = $dir.'/' unless $dir =~ /\/$/;
    mkdir $dir.'/css';mkdir $dir.'/js';
    dircopy( $FindBin::Bin.'/css', $dir.'/css' );
    dircopy( $FindBin::Bin.'/js', $dir.'/js' );
    
    my $file = $dir.'report.txt';
    open my $report, '>', $file or die "Cannot open $file $!\n";
    
    my @toBuild = ( [$build_index, \$ref],  [$build_tRNAs, \$tRNAs], [$build_rRNAs, \$rRNAs], [$build_snRNAs, \$snRNAs], [$build_miRNAs, \$miRNAs], [$build_transcripts, \$transcripts], [$build_TE, \$TE] );
    to_build ( \@toBuild, $report, $dir );
    
    my $proc_child = ceil($max_procs / scalar(@fastq));
    my $proc_grand_child = ceil($proc_child/4);
    my $pm = Parallel::ForkManager->new($max_procs);
    my $pm2 = Parallel::ForkManager->new($proc_grand_child);
    
    $pm->run_on_finish( sub {
        my ($pid, $exit_code, $ident) = @_;
        print $report "Fastq fork $ident just finished ".
        "with PID $pid and exit code: $exit_code\n";
        die "Something went wrong!\n" if $exit_code != 0;
    });
    
    
    $pm->run_on_start( sub {
        my ($pid,$ident)=@_;
        print $report "Fastq fork : $ident started, pid: $pid\n";
    });
    
    
    $pm2->run_on_finish( sub {
        my ($pid, $exit_code, $ident) = @_;
        print $report "** Subgroup fork $ident just finished ".
        "with PID $pid and exit code: $exit_code\n";
        die "Something went wrong!\n" if $exit_code != 0;
    });
    
    
    $pm2->run_on_start( sub {
        my ($pid,$ident)=@_;
        print $report "** Subgroup fork $ident started, pid: $pid\n";
    });
    
    foreach my $child ( 0 .. $#fastq )
    {
        my @suffix = ('.fastq', '.fastq.gz,', '.fq', '.fq.gz', 'ref', '.dat', '.fa','.fas','.fasta', '.txt');
        my ( $name, $path, $suffix ) = fileparse( $fastq[$child], @suffix );
        my ( $ref_name, $ref_path, $ref_suffix ) = fileparse( $ref, @suffix );
        my ( $TE_name, $TE_path, $TE_suffix ) = fileparse( $TE, @suffix );
        my ( $ex_name, $ex_path, $ex_suffix ) = fileparse( $transcripts, @suffix );
    
        $pm->start($fastq[$child]) and next;
    
        my $dir_fq = $dir.$fastq_n[$child].'/';
        mkdir $dir_fq;
    
        my $gen_dir = $dir_fq.'genome/';
        mkdir $gen_dir;
    
        my $size_dir = $dir_fq.'size/';
        mkdir $size_dir;
    
        my $fastq_resized = $dir_fq.$name.'_'.$min.'-'.$max.'.fastq';
        size_distribution (  $fastq[$child], $fastq_resized, $size_dir, $min, $max );
    
        my $sam_genome = $gen_dir.$fastq_n[$child].'_'.$min.'-'.$max.'.sam';
        my $sam_genome_unique = $gen_dir.$fastq_n[$child].'_'.$min.'-'.$max.'_unique.sam';
        my $fastq_prefix = $gen_dir.$fastq_n[$child].'_'.$min.'-'.$max;
    
        BWA_call ( $ref, $fastq_resized, $sam_genome, $mis, $proc_child, $report );
        my ( $fai_ref_hashP, $ma, $ma_uni ) = get_unique ( $sam_genome, $sam_genome_unique, $gen_dir, $fq_collection.$fastq_n[$child], 1, $report );
    
        die "No Reads mapped on the genome reference!\n" if $ma == 0;
        my $scale = 1000000 / $ma;
        sam_to_bam_bg ( $sam_genome_unique, $scale, $proc_child );
        sam_to_bam_bg ( $sam_genome, $scale, $proc_child );
    
        my $Gviz_dir = $gen_dir.'Gviz/';
        my $fai_file =  $gen_dir.'fai';
        mkdir $Gviz_dir;
        my $Gviz_dir_rand = $Gviz_dir.'rand/';
        mkdir $Gviz_dir_rand;
        my $Gviz_dir_uni = $Gviz_dir.'unique/';
        mkdir $Gviz_dir_uni;
    
        open my $gfai, '>', $fai_file;
        foreach my $k  ( sort keys %{$fai_ref_hashP} )
        {
            print $gfai "$k\t$fai_ref_hashP->{$k}\n";
        }
        close $gfai;
        bg_to_png ( $fai_file, $fastq_prefix.'_unique_plus.bedgraph', $fastq_prefix.'_unique_minus.bedgraph', $Gviz_dir_uni, 'Mb' );
        bg_to_png ( $fai_file, $fastq_prefix.'_plus.bedgraph', $fastq_prefix.'_minus.bedgraph', $Gviz_dir_rand, 'Mb' );
    
        my $group_dir = $dir_fq.'subgroups/';
        my $fastq_uni = $fq_collection.$fastq_n[$child].'_unique_mappers.fastq';
        my $fastq_all = $fq_collection.$fastq_n[$child].'_all_mappers.fastq';
        my ($bo, $mi, $pi) = subgroups ( $fastq_all, $group_dir, $mis, $misTE, $proc_child, $tRNAs, $rRNAs, $snRNAs, $miRNAs, $transcripts, $TE, $si_min, $si_max, $pi_min, $pi_max, $report);
    
        pie_chart($group_dir);
    
        open (my $dupnum, $gen_dir.'dup_mapnum.txt') || die "cannot open dup_mapnum.txt $!";
        my %dupnum_genome;
        my $header = <$dupnum>;
        while (<$dupnum>)
        {
            chomp $_;
            my @dupline = split /\t/, $_;
            $dupnum_genome{$dupline[0]} = [$dupline[1], $dupline[2]];
        }
        close $dupnum;
    
        my $mi_sam = $group_dir.'miRNAs.sam';
        mkdir $group_dir.'miRNAs/';
        my $mi_count_file =  $group_dir.'miRNAs/miRNAs_reads_counts.txt';
        my ( $mi_count, $mi_ref_size ) = sam_count ( $mi_sam );
    
        rpms_rpkm( $mi_count, $mi_ref_size, $ma, $mi_count_file, $pi, $mi, $bo );
    
        my (  $sam_transcripts, $sam_TEs ) = ( $group_dir.'transcripts.sam', $group_dir.'TEs.sam' );
        my @types = ($group_dir.'bonafide_reads.fastq', $group_dir.'miRNAs.fastq', $group_dir.'siRNAs.fastq', $group_dir.'piRNAs.fastq' );
        my @types_names = ('bonafide_reads', 'miRNAs', 'siRNAs', 'piRNAs');
        foreach my $grand_child ( 0 .. $#types )
        {
            my $type_dir = $group_dir.$types_names[$grand_child].'/';
            my $type_prefix = $types_names[$grand_child].'-';
            mkdir  $type_dir;
            $pm2->start($types[$grand_child]) and next;
            my ( $type_sam_genome, $type_sam_TEs, $type_sam_transcripts ) = ( $type_dir.$type_prefix.'genome.sam', $type_dir.$type_prefix.'TEs.sam', $type_dir.$type_prefix.'transcripts.sam' );
            my ( $type_sam_uni_genome, $type_sam_uni_TEs,  $type_sam_uni_transcripts ) = ( $type_dir.$type_prefix.'genome_unique.sam', $type_dir.$type_prefix.'TEs_unique.sam', $type_dir.$type_prefix.'transcripts_unique.sam' );
            my ( $type_uni_genome_fastq, $type_uni_TEs_fastq,  $type_uni_transcripts_fastq ) = ( $fq_collection.$fastq_n[$child].'-'.$type_prefix.'genome_uni.fastq', $fq_collection.$fastq_n[$child].'-'.$type_prefix.'TEs_uni.fastq', $fq_collection.$fastq_n[$child].'-'.$type_prefix.'transcripts_uni.fastq');
            my ( $type_genome_fastq, $type_TEs_fastq,  $type_transcripts_fastq ) = ( $fq_collection.$fastq_n[$child].'-'.$type_prefix.'genome.fastq', $fq_collection.$fastq_n[$child].'-'.$type_prefix.'TEs.fastq', $fq_collection.$fastq_n[$child].'-'.$type_prefix.'transcripts.fastq');
            my $type_sequence_hashP = get_fastq_seq ( $types[$grand_child] );
    
            if ( $grand_child == 1 )
            {
                BWA_call ( $TE, $types[$grand_child],  $type_sam_TEs, $misTE, $proc_child, $report );
                BWA_call ( $transcripts, $types[$grand_child], $type_sam_transcripts, $mis, $proc_child, $report );
                BWA_call ( $ref, $types[$grand_child], $type_sam_genome, $mis, $proc_child, $report );
                extract_sam ( undef, $type_sam_TEs, $type_sam_TEs, $type_sam_uni_TEs, $type_uni_TEs_fastq, $type_uni_TEs_fastq );
                extract_sam ( undef, $type_sam_transcripts, $type_sam_transcripts, $type_sam_uni_transcripts, $type_transcripts_fastq, $type_uni_transcripts_fastq );
                extract_sam ( undef, $type_sam_genome, $type_sam_genome, $type_sam_uni_genome, $type_genome_fastq, $type_uni_genome_fastq );
            }
            else
            {
                extract_sam ( $type_sequence_hashP, $sam_TEs, $type_sam_TEs, $type_sam_uni_TEs, $type_TEs_fastq, $type_uni_TEs_fastq );
                extract_sam ( $type_sequence_hashP, $sam_transcripts, $type_sam_transcripts, $type_sam_uni_transcripts, $type_transcripts_fastq, $type_uni_transcripts_fastq );
                extract_sam ( $type_sequence_hashP, $sam_genome, $type_sam_genome, $type_sam_uni_genome, $type_genome_fastq, $type_uni_genome_fastq );
            }
    
            my $ex_count_file =  $type_dir.$type_prefix.'transcripts_reads_counts.txt';
            my ( $ex_count, $ex_ref_size ) =  sam_count_mis ( $type_sam_transcripts );
            rpms_rpkm_te( $ex_count, $ex_ref_size, $ma, $ex_count_file, $pi, $mi, $bo );
    
            my ( $TEs_count, $TEs_ref_size, $TEs_count_NoM, $TEs_count_M ) = sam_count_mis ( $type_sam_TEs );
            my $TEs_count_file = $type_dir.$type_prefix.'TEs_reads_counts.txt';
            my $TEs_count_file_M = $type_dir.$type_prefix.'TEs_reads_counts_mismatches.txt';
            my $TEs_count_file_noM = $type_dir.$type_prefix.'TEs_reads_counts_nomismatches.txt';
            rpms_rpkm_te( $TEs_count, $TEs_ref_size, $ma, $TEs_count_file, $pi, $mi, $bo );
            rpms_rpkm_te( $TEs_count_NoM, $TEs_ref_size, $ma, $TEs_count_file_noM, $pi, $mi, $bo );
            rpms_rpkm_te( $TEs_count_M, $TEs_ref_size, $ma, $TEs_count_file_M, $pi, $mi, $bo );
    
            sam_to_bam_bg ( $type_sam_TEs, $scale, $grand_child );
            sam_sorted_bam ( $type_sam_transcripts, $grand_child ); sam_sorted_bam ( $type_sam_uni_transcripts, $grand_child );
            sam_sorted_bam ( $type_sam_uni_TEs, $grand_child );
    
            my $Gviz_TEs =  $type_dir.'Gviz_TEs/';
            mkdir $Gviz_TEs;
            bg_to_png ( $group_dir.'TEs.fai', $type_dir.$type_prefix.'TEs_plus.bedgraph', $type_dir.$type_prefix.'TEs_minus.bedgraph', $Gviz_TEs, 'Kb' );
    
            my $Gviz_genome=  $type_dir.'Gviz_genome/';
            my $Gviz_genome_rand = $Gviz_genome.'rand/';
            my $Gviz_genome_uni = $Gviz_genome.'unique/';
            mkdir $Gviz_genome; mkdir $Gviz_genome_uni; mkdir $Gviz_genome_rand;
    
            sam_to_bam_bg ( $type_sam_genome, $scale, $grand_child );
            sam_to_bam_bg ( $type_sam_uni_genome, $scale, $grand_child );
    
            bg_to_png ( $fai_file, $type_dir.$type_prefix.'genome_unique_plus.bedgraph', $type_dir.$type_prefix.'genome_unique_minus.bedgraph', $Gviz_genome_uni, 'Mb' );
            bg_to_png ( $fai_file, $type_dir.$type_prefix.'genome_plus.bedgraph', $type_dir.$type_prefix.'genome_minus.bedgraph', $Gviz_genome_rand, 'Mb' );
    
            #HTML Details
            my $prefix_details_pages = $dir.$fastq_n[$child].'-'.$types_names[$grand_child];
            details_pages ( $type_dir, $prefix_details_pages, \@fastq_n, $fastq_n[$child], $misTE, $dir, $Pcheck );
    
            $pm2->finish();
        }
        $pm2->wait_all_children;
    
        if ( $Pcheck eq 'true' )
        {
            my $ppp = $group_dir.'PPPartners/'; mkdir $ppp;
            print $report "ping_pong_partners $group_dir/piRNAs/TEs.sam $ppp\n";
            ping_pong_partners ( $group_dir.'TEs.fai', $group_dir.'piRNAs/piRNAs-TEs_sorted.bam', $ppp, $pi_min );
            my $ppp_page = $dir.$fastq_n[$child].'-piRNAs-PPP.html';
            ppp_page ( $group_dir, $ppp_page, \@fastq_n, $fastq_n[$child], $ppp, $dir );
        }
    
        #HTML Main Webpage
        my $index_page = $dir.$fastq_n[$child].'.html';
        main_page ( $gen_dir, $index_page, \@fastq_n, $fastq_n[$child], $ma, $ma_uni, $dir );
        copy ($index_page, $html_out) if $child == 0;
        #HTML Menu
        my $menu_page = $dir.$fastq_n[$child].'-sub.html';
        menu_page ( $group_dir, $menu_page, \@fastq_n, $fastq_n[$child], $min, $max, $si_min, $si_max, $pi_min, $pi_max, $dir );
        unlink glob "'$group_dir'*.sam"; unlink glob "'$group_dir'*.fastq";
        $pm->finish(); # pass an exit code to finish
    }
    $pm->wait_all_children;
    unlink glob "'$dir'"."dataset_*symlink.fa*";
    print $report "Job done!\n";
    close $report;
} else {
    print "sRNAPipe v1.1\n";
}