process CNVPYTOR_VIEW {
    tag "$meta.id"
    label 'process_medium'

    conda (params.enable_conda ? "bioconda::cnvpytor=1.2.1" : null)
    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
        'https://depot.galaxyproject.org/singularity/cnvpytor:1.2.1--pyhdfd78af_0':
        'quay.io/biocontainers/cnvpytor:1.2.1--pyhdfd78af_0' }"

    input:
    tuple val(meta), path(pytor_files)
    val bin_sizes
    val output_format

    output:
    tuple val(meta), path("*.vcf"), emit: vcf      , optional: true
    tuple val(meta), path("*.tsv"), emit: tsv      , optional: true
    tuple val(meta), path("*.xls"), emit: xls      , optional: true
    path "versions.yml"           , emit: versions

    when:
    task.ext.when == null || task.ext.when

    script:
    def output_suffix = output_format ?: 'vcf'
    def bins   = bin_sizes ?: '1000'
    def input  = pytor_files.join(" ")
    def prefix = task.ext.prefix ?: "${meta.id}"
    """

    python3 <<CODE
    import cnvpytor,os
    binsizes = "${bins}".split(" ")
    for binsize in binsizes:
        file_list = "${input}".split(" ")
        app = cnvpytor.Viewer(file_list, params={} )
        outputfile = "{}_{}.{}".format("${prefix}",binsize.strip(),"${output_suffix}")
        app.print_filename = outputfile
        app.bin_size = int(binsize)
        app.print_calls_file()
    CODE

    cat <<-END_VERSIONS > versions.yml
    "${task.process}":
        cnvpytor: \$(echo \$(cnvpytor --version 2>&1) | sed 's/CNVpytor //' )
    END_VERSIONS
    """

    stub:
    def output_suffix = output_format ?: 'vcf'
    def prefix = task.ext.prefix ?: "${meta.id}"
    """
    touch ${prefix}.${output_suffix}

    cat <<-END_VERSIONS > versions.yml
    "${task.process}":
        cnvpytor: \$(echo \$(cnvpytor --version 2>&1) | sed 's/CNVpytor //' )
    END_VERSIONS
    """
}