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#!/bin/bash

## eResearch Office, QUT
## Created:  31 March 2021
## Last modified: 24 May 2021
## Script: Processes Galaxy Australia generated blastN outputs to summarise and report hits to REGULATED and ENDEMIC viruses/viroids.
## Usage: ./run_VSD_report.sh

dataPath=${PWD}

# Requirement: One or more GA-VSD .tabular outputs need to be in the folder where the command above (Usage)is executed.
# The script will Look for all files with the suffix *.tabular

# Help information to user (i.e., script_name -h or script_name --help)

#Required file in the same folder of tabular outputs
ICTV='ICTV_taxonomy_MinIdentity_Species_20210514.tsv'


if [ "$1" == "-h" ]; then
  echo "Usage: "./`basename ./$0`" "
  exit 0

elif [ "$1" == "--help" ]
  then
    echo "Usage: "./`basename $0`" "
    exit 1
fi

#Processing tabular files

for file in *.tabular
   do
      var=$(basename $file)
      
      #STEP0: fetch Top 1 Hits
      cat $file | awk '{print $1}' | sort | uniq > ${var}.top1.ids
      for i in `cat ${var}.top1.ids`; do echo "fetching top hits..." $i; grep $i $file | head -1 >> ${var}.top1Hits.txt ; done

      #STEP1: modify the columns of Galaxy Australia (GA) blast output to the expected format by the BlastTools.jar tool
      ######  namely: qseqid sgi sacc length pident mismatch gapopen qstart qend qlen sstart send slen sstrand evalue bitscore qcovhsp stitle staxids qseq sseq sseqid qcovs qframe sframe
      cat ${var}.top1Hits.txt |csvtk cut -H -t -f 1,19,20,4,3,5,6,7,8,17,9,10,18,22,11,12,24,21,25,15,16,2,23,13,14 | sed 's/ /_/g' > ${var}.txt 
      
      #STEP2: summarise the GA blastN files
      java -jar /mnt/c/Users/lelwala/HTS/BlastTools.jar -t blastn ${var}.txt 

      #filter regulated/edemic/LandPlant
      cat summary_${var}.txt | grep "regulated" >> summary_${var}_filtered.txt
      cat summary_${var}.txt | grep "endemic" >> summary_${var}_filtered.txt
      cat summary_${var}.txt | grep "LandPlant" >> summary_${var}_filtered.txt

      #STEP3: fetch unique names from Blast summary reports
      cat summary_${var}_filtered.txt | awk '{print $7}' | awk -F "|" '{print $3}'| sort | uniq | sed 's/Species://' > ${var}_uniq.ids

      #STEP4: retrieve the best hit for each virus/viroid
      echo "processing top hits ..."
      for id in `cat ${var}_uniq.ids` 
        do
          #print on the screen the name of the virus/viroids to search
          #echo "fetching species matches ..." $id
          
          #fetch the virus name on the summary_blastn file by selecteing longest alignment (column 3) and highest genome coverage (column 5)
          grep $id summary_${var}.txt | sort -k3,3nr -k5,5nr | head -1 >> ${var}_filtered.txt

          #print the header of the inital summary_blastn file
          cat summary_${var}.txt | head -1 > header

          #fetch hits to REGULATED and ENDEMIC viruses
          grep "regulated" ${var}_filtered.txt > summary_${var}_REGULATED_viruses_viroids
          
          grep "endemic" ${var}_filtered.txt > summary_${var}_ENDEMIC_viruses_viroids

          ##### REPORT1 ##### add header to columns
          cat header summary_${var}_REGULATED_viruses_viroids > summary_${var}_REGULATED_viruses_viroids.txt

          cat header summary_${var}_ENDEMIC_viruses_viroids > summary_${var}_ENDEMIC_viruses_viroids.txt

          #fetch genus names of identified hits
          awk '{print $7}' summary_${var}_REGULATED_viruses_viroids.txt | awk -F "|" '{print $3}' | sed 's/Species://' | sed 1d > wanted_regulated.names

          awk '{print $7}' summary_${var}_ENDEMIC_viruses_viroids.txt | awk -F "|" '{print $3}' | sed 's/Species://' | sed 1d > wanted_endemic.names

          #add species to report
          paste wanted_regulated.names summary_${var}_REGULATED_viruses_viroids > summary_${var}_REGULATED_viruses_viroids.MOD
          
          paste wanted_endemic.names summary_${var}_ENDEMIC_viruses_viroids > summary_${var}_ENDEMIC_viruses_viroids.MOD

          #STEP5: fecth ICTV information
          grep -w -F -f wanted_regulated.names $ICTV > wanted_regulated.ICTV
          
          grep -w -F -f wanted_endemic.names $ICTV > wanted_endemic.ICTV

          #join reports with ICTV information
          join -a 1 -1 1 -2 1 summary_${var}_REGULATED_viruses_viroids.MOD  wanted_regulated.ICTV | tr ' ' '\t' | awk '$4>=70' >  summary_${var}_REGULATED_viruses_viroids_ICTV
  
          #print name of virus/viroid being processed
          echo "$id"
 
          join -a 1 -1 1 -2 1 summary_${var}_ENDEMIC_viruses_viroids.MOD  wanted_endemic.ICTV | tr ' ' '\t' | awk '$4>=70' > summary_${var}_ENDEMIC_viruses_viroids_ICTV   

          #modify header
          awk '{print "Species" "\t" $0 "\t" "ICTV_information"}' header > header2

          ##### REPORT2 ##### add header2 to identified hits
          cat header2 summary_${var}_REGULATED_viruses_viroids_ICTV > summary_${var}_REGULATED_viruses_viroids_ICTV.txt

          cat header2 summary_${var}_ENDEMIC_viruses_viroids_ICTV | awk -F"\t" '$1!=""&&$2!=""&&$3!=""' > summary_${var}_ENDEMIC_viruses_viroids_ICTV.txt
         
      done

echo "completed!"

#removing intermediate files
rm ${var}.txt ${var}_uniq.ids summary_${var}_filtered.txt  *top1Hits.txt *viruses_viroids.txt header* *.MOD *ENDEMIC_viruses_viroids *_ICTV  wanted* ${var}_filtered.txt ${var}.top1.ids summary_${var}_REGULATED_viruses_viroids

done