// Import generic module functions
include { initOptions; saveFiles; getSoftwareName; getProcessName } from './functions'

params.options = [:]
options        = initOptions(params.options)

process BBMAP_ALIGN {
    tag "$meta.id"
    label 'process_medium'
    publishDir "${params.outdir}",
        mode: params.publish_dir_mode,
        saveAs: { filename -> saveFiles(filename:filename, options:params.options, publish_dir:getSoftwareName(task.process), meta:meta, publish_by_meta:['id']) }

    conda (params.enable_conda ? "bioconda::bbmap=38.92 bioconda::samtools=1.13 pigz=2.6" : null)
    if (workflow.containerEngine == 'singularity' && !params.singularity_pull_docker_container) {
        container "https://depot.galaxyproject.org/singularity/mulled-v2-008daec56b7aaf3f162d7866758142b9f889d690:f5f55fc5623bb7b3f725e8d2f86bedacfd879510-0"
    } else {
        container "quay.io/biocontainers/mulled-v2-008daec56b7aaf3f162d7866758142b9f889d690:f5f55fc5623bb7b3f725e8d2f86bedacfd879510-0"
    }

    input:
    tuple val(meta), path(fastq)
    path ref

    output:
    tuple val(meta), path("*.bam"), emit: bam
    path "versions.yml"           , emit: versions

    script:
    def prefix   = options.suffix ? "${meta.id}${options.suffix}" : "${meta.id}"

    input = meta.single_end ? "in=${fastq}" : "in=${fastq[0]} in2=${fastq[1]}"

    // Set the db variable to reflect the three possible types of reference input: 1) directory
    // named 'ref', 2) directory named something else (containg a 'ref' subdir) or 3) a sequence
    // file in fasta format
    if ( ref.isDirectory() ) {
        if ( ref ==~ /(.\/)?ref\/?/ ) {
            db = ''
        } else {
            db = "path=${ref}"
        }
    } else {
        db = "ref=${ref}"
    }

    """
    bbmap.sh \\
        $db \\
        $input \\
        out=${prefix}.bam \\
        $options.args \\
        threads=$task.cpus \\
        -Xmx${task.memory.toGiga()}g

    cat <<-END_VERSIONS > versions.yml
    ${getProcessName(task.process)}:
        ${getSoftwareName(task.process)}: \$(bbversion.sh)
        samtools: \$(echo \$(samtools --version 2>&1) | sed 's/^.*samtools //; s/Using.*\$//')
        pigz: \$( pigz --version 2>&1 | sed 's/pigz //g' )
    END_VERSIONS
    """
}