#!/bin/sh
#
# pal_finder_wrapper.sh: run pal_finder perl script as a Galaxy tool
#
# Usage: run_palfinder.sh FASTQ_R1 FASTQ_R2 MICROSAT_SUMMARY PAL_SUMMARY FILTERED_MICROSATS [OPTIONS]
#        run_palfinder.sh --454    FASTA    MICROSAT_SUMMARY PAL_SUMMARY [OPTIONS]
#
# Options:
#
# --primer-prefix PREFIX: prefix added to the beginning of all primer names (prPrefixName)
# --2merMinReps N: miniumum number of 2-mer repeat units to detect (0=ignore units of this size)
# --3merMinReps N
# --4merMinReps N
# --5merMinReps N
# --6merMinReps N
# --primer-mispriming-library FASTA: specify a Fasta file with sequences to avoid amplifying
# --primer-opt-size VALUE: optimum primer length
# --primer-min-size VALUE: minimum acceptable primer length
# --primer-max-size VALUE: maximum acceptable primer length
# --primer-min-gc VALUE: minimum allowable percentage of Gs and Cs in any primer
# --primer-max-gc VALUE: maximum allowable percentage of Gs and Cs
# --primer-gc-clamp VALUE: number of consecutive Gs and Cs at 3' end of both left and right primer
# --primer-max-end-gc VALUE: max number of Gs or Cs in last five 3' bases of left or right primer
# --primer-min-tm VALUE: minimum acceptable melting temperature (Celsius) for a primer oligo
# --primer-max-tm VALUE: maximum acceptable melting temperature (Celsius)
# --primer-opt-tm VALUE: optimum melting temperature (Celsius)
# --primer-pair-max-diff-tm VALUE: max difference between melting temps of left & right primers
# --output_config_file FNAME: write a copy of the config.txt file to FNAME
# --filter_microsats FNAME: run Graeme Fox's Perl script to filter and sort the
#                           microsatellites from pal_finder and write to FNAME
#
# pal_finder is available from http://sourceforge.net/projects/palfinder/
#
# primer3 is available from http://primer3.sourceforge.net/releases.php
# (nb needs version 2.0.0-alpha)
#
# Explicitly set the locations of the pal_finder script, data files and the primer3
# executable by setting the following variables in the environment:
#
#  * PALFINDER_SCRIPT_DIR: location of the pal_finder Perl script (defaults to
#    /usr/bin)
#  * PALFINDER_DATA_DIR: location of the pal_finder data files (specifically
#    config.txt and simple.ref; defaults to /usr/share/pal_finder_v0.02.04)
#  * PRIMER3_CORE_EXE: name of the primer3_core program, which should include the
#    full path if it's not on the Galaxy user's PATH (defaults to primer3_core)
#
echo "### $(basename $0) ###"
echo $*
#
# Initialise locations of scripts, data and executables
#
# Set these in the environment to overide at execution time
: ${PALFINDER_SCRIPT_DIR:=/usr/bin}
: ${PALFINDER_DATA_DIR:=/usr/share/pal_finder_v0.02.04}
: ${PRIMER3_CORE_EXE:=primer3_core}
#
# Filter script is in the same directory as this script
PALFINDER_FILTER_PL=$(dirname $0)/pal_finder_filter.pl
if [ ! -f $PALFINDER_FILTER_PL ] ; then
    echo No pal_finder_filter.pl script >&2
    exit 1
fi
#
# Check that we have all the components
function have_program() {
    local program=$1
    local got_program=$(which $program 2>&1 | grep "no $(basename $program) in")
    if [ -z "$got_program" ] ; then
	echo yes
    else
	echo no
    fi	
}
if [ "$(have_program $PRIMER3_CORE_EXE)" == "no" ] ; then
    echo "ERROR primer3_core missing: ${PRIMER3_CORE_EXE} not found" >&2
    exit 1
fi
if [ ! -f "${PALFINDER_DATA_DIR}/config.txt" ] ; then
    echo "ERROR pal_finder config.txt not found in ${PALFINDER_DATA_DIR}" >&2
    exit 1
fi
if [ ! -f "${PALFINDER_SCRIPT_DIR}/pal_finder_v0.02.04.pl" ] ; then
    echo "ERROR pal_finder_v0.02.04.pl not found in ${PALFINDER_SCRIPT_DIR}" >&2
    exit 1
fi
#
# Initialise parameters used in the config.txt file
PRIMER_PREFIX="test"
MIN_2_MER_REPS=6
MIN_3_MER_REPS=0
MIN_4_MER_REPS=0
MIN_5_MER_REPS=0
MIN_6_MER_REPS=0
PRIMER_MISPRIMING_LIBRARY=$PALFINDER_DATA_DIR/simple.ref
PRIMER_OPT_SIZE=
PRIMER_MAX_SIZE=
PRIMER_MIN_SIZE=
PRIMER_MAX_GC=
PRIMER_MIN_GC=
PRIMER_GC_CLAMP=
PRIMER_MAX_END_GC=
PRIMER_OPT_TM=
PRIMER_MAX_TM=
PRIMER_MIN_TM=
PRIMER_PAIR_MAX_DIFF_TM=
OUTPUT_CONFIG_FILE=
FILTERED_MICROSATS=
#
# Collect command line arguments
if [ $# -lt 2 ] ; then
  echo "Usage: $0 FASTQ_R1 FASTQ_R2 MICROSAT_SUMMARY PAL_SUMMARY [OPTIONS]"
  echo "       $0 --454    FASTA    MICROSAT_SUMMARY PAL_SUMMARY [OPTIONS]"
  exit
fi
if [ "$1" == "--454" ] ; then
    PLATFORM="454"
    FNA=$2
else
    PLATFORM="Illumina"
    FASTQ_R1=$1
    FASTQ_R2=$2
fi
MICROSAT_SUMMARY=$3
PAL_SUMMARY=$4
shift; shift; shift; shift
#
# Collect command line options
while [ ! -z "$1" ] ; do
    case "$1" in
	--primer-prefix)
	    shift
	    # Convert spaces to underscores in prefix
	    PRIMER_PREFIX=$(echo $1 | tr " " "_")
	    ;;
	--2merMinReps)
	    shift
	    MIN_2_MER_REPS=$1
	    ;;
	--3merMinReps)
	    shift
	    MIN_3_MER_REPS=$1
	    ;;
	--4merMinReps)
	    shift
	    MIN_4_MER_REPS=$1
	    ;;
	--5merMinReps)
	    shift
	    MIN_5_MER_REPS=$1
	    ;;
	--6merMinReps)
	    shift
	    MIN_6_MER_REPS=$1
	    ;;
	--primer-mispriming-library)
	    shift
	    PRIMER_MISPRIMING_LIBRARY=$1
	    ;;
	--primer-opt-size)
	    shift
	    PRIMER_OPT_SIZE=$1
	    ;;
	--primer-max-size)
	    shift
	    PRIMER_MAX_SIZE=$1
	    ;;
	--primer-min-size)
	    shift
	    PRIMER_MIN_SIZE=$1
	    ;;
	--primer-max-gc)
	    shift
	    PRIMER_MAX_GC=$1
	    ;;
	--primer-min-gc)
	    shift
	    PRIMER_MIN_GC=$1
	    ;;
	--primer-gc-clamp)
	    shift
	    PRIMER_GC_CLAMP=$1
	    ;;
	--primer-max-end-gc)
	    shift
	    PRIMER_MAX_END_GC=$1
	    ;;
	--primer-opt-tm)
	    shift
	    PRIMER_OPT_TM=$1
	    ;;
	--primer-max-tm)
	    shift
	    PRIMER_MAX_TM=$1
	    ;;
	--primer-min-tm)
	    shift
	    PRIMER_MIN_TM=$1
	    ;;
	--primer-pair-max-diff-tm)
	    shift
	    PRIMER_PAIR_MAX_DIFF_TM=$1
	    ;;
	--output_config_file)
	    shift
	    OUTPUT_CONFIG_FILE=$1
	    ;;
	--filter_microsats)
	    shift
	    FILTERED_MICROSATS=$1
	    ;;
	*)
	    echo Unknown option: $1 >&2
	    exit 1
	    ;;
    esac
    shift
done
#
# Check that primer3_core is available
got_primer3=`which $PRIMER3_CORE_EXE 2>&1 | grep -v "no primer3_core in"`
if [ -z "$got_primer3" ] ; then
  echo ERROR primer3_core not found >&2
  exit 1
fi
#
# Set up the working dir
if [ "$PLATFORM" == "Illumina" ] ; then
    # Paired end Illumina data as input
    if [ $FASTQ_R1 == $FASTQ_R2 ] ; then
	echo ERROR R1 and R2 fastqs are the same file >&2
	exit 1
    fi
    ln -s $FASTQ_R1
    ln -s $FASTQ_R2
    fastq_r1=$(basename $FASTQ_R1)
    fastq_r2=$(basename $FASTQ_R2)
else
    # 454 data as input
    ln -s $FNA
    fna=$(basename $FNA)
fi
ln -s $PRIMER_MISPRIMING_LIBRARY
PRIMER_MISPRIMING_LIBRARY=$(basename $PRIMER_MISPRIMING_LIBRARY)
mkdir Output
#
# Copy in the default config.txt file
echo "### Creating config.txt file for pal_finder run ###"
/bin/cp $PALFINDER_DATA_DIR/config.txt .
#
# Update the config.txt file with new values
function set_config_value() {
    local key=$1
    local value=$2
    local config_txt=$3
    if [ -z "$value" ] ; then
	echo "No value for $key, left as default"
    else
	echo Setting "$key" to "$value"
	sed -i 's,^'"$key"' .*,'"$key"'  '"$value"',' $config_txt
    fi
}
# Input files
set_config_value platform $PLATFORM config.txt
if [ "$PLATFORM" == "Illumina" ] ; then
    set_config_value inputFormat fastq config.txt
    set_config_value pairedEnd 1 config.txt
    set_config_value inputReadFile $fastq_r1 config.txt
    set_config_value pairedReadFile $fastq_r2 config.txt
else
    set_config_value inputFormat fasta config.txt
    set_config_value pairedEnd 0 config.txt
    set_config_value input454reads $fna config.txt
fi
# Output files
set_config_value MicrosatSumOut Output/microsat_summary.txt config.txt
set_config_value PALsummaryOut Output/PAL_summary.txt config.txt
# Microsat info
set_config_value 2merMinReps $MIN_2_MER_REPS config.txt
set_config_value 3merMinReps $MIN_3_MER_REPS config.txt
set_config_value 4merMinReps $MIN_4_MER_REPS config.txt
set_config_value 5merMinReps $MIN_5_MER_REPS config.txt
set_config_value 6merMinReps $MIN_6_MER_REPS config.txt
# Primer3 settings
set_config_value primer3input Output/pr3in.txt config.txt
set_config_value primer3output Output/pr3out.txt config.txt
set_config_value primer3executable $PRIMER3_CORE_EXE config.txt
set_config_value prNamePrefix ${PRIMER_PREFIX}_ config.txt
set_config_value PRIMER_MISPRIMING_LIBRARY "$PRIMER_MISPRIMING_LIBRARY" config.txt
set_config_value PRIMER_OPT_SIZE "$PRIMER_OPT_SIZE" config.txt
set_config_value PRIMER_MIN_SIZE "$PRIMER_MIN_SIZE" config.txt
set_config_value PRIMER_MAX_SIZE "$PRIMER_MAX_SIZE" config.txt
set_config_value PRIMER_MIN_GC "$PRIMER_MIN_GC" config.txt
set_config_value PRIMER_MAX_GC "$PRIMER_MAX_GC" config.txt
set_config_value PRIMER_GC_CLAMP "$PRIMER_GC_CLAMP" config.txt
set_config_value PRIMER_MAX_END_GC "$PRIMER_MAX_END_GC" config.txt
set_config_value PRIMER_MIN_TM "$PRIMER_MIN_TM" config.txt
set_config_value PRIMER_MAX_TM "$PRIMER_MAX_TM" config.txt
set_config_value PRIMER_OPT_TM "$PRIMER_OPT_TM" config.txt
set_config_value PRIMER_PAIR_MAX_DIFF_TM "$PRIMER_PAIR_MAX_DIFF_TM" config.txt
#
# Run pal_finder
echo "### Running pal_finder ###"
perl $PALFINDER_SCRIPT_DIR/pal_finder_v0.02.04.pl config.txt 2>&1 | tee pal_finder.log
echo "### pal_finder finised ###"
#
# Check that log ends with "Done!!" message
if [ -z "$(tail -n 1 pal_finder.log | grep Done!!)" ] ; then
    echo ERROR pal_finder failed to complete successfully >&2
    exit 1
fi
#
# Run the pal_finder_filter.pl script from Graeme Fox
if [ ! -z "$FILTERED_MICROSATS" ] ; then
    echo "### Running filtering script ###"
    perl $PALFINDER_FILTER_PL Output/PAL_summary.txt 2>&1
    if [ $? -ne 0 ] ; then
	echo ERROR pal_finder_filter.pl exited with non-zero status >&2
	exit 1
    elif [ ! -f pal_finder_filter_output.txt ] ; then
	echo ERROR no output from pal_finder_filter.pl >&2
	exit 1
    fi
fi
#
# Clean up
echo "### Handling output files ###"
if [ -f Output/microsat_summary.txt ] ; then
    /bin/mv Output/microsat_summary.txt $MICROSAT_SUMMARY
fi
if [ -f Output/PAL_summary.txt ] ; then
    /bin/mv Output/PAL_summary.txt $PAL_SUMMARY
fi
if [ ! -z "$FILTERED_MICROSATS" ] && [ -f pal_finder_filter_output.txt ] ; then
    /bin/mv pal_finder_filter_output.txt $FILTERED_MICROSATS
fi
if [ ! -z "$OUTPUT_CONFIG_FILE" ] && [ -f config.txt ] ; then
    /bin/mv config.txt $OUTPUT_CONFIG_FILE
fi
##
#