<tool id="dada2_mergePairs" name="dada2: mergePairs" version="@DADA2_VERSION@+galaxy@WRAPPER_VERSION@">
    <description>Merge denoised forward and reverse reads</description>
    <macros>
        <import>macros.xml</import>
    </macros>
    <expand macro="requirements"/>
    <expand macro="version_command"/>
    <command detect_errors="exit_code"><![CDATA[
    Rscript '$dada2_script'
    ]]></command>
    <configfiles>
        <configfile name="dada2_script"><![CDATA[
library(dada2, quietly=T)

dadaF <- readRDS('$dadaF')
dadaR <- readRDS('$dadaR')
derepF <- readRDS('$derepF')
derepR <- readRDS('$derepR')

merged <- mergePairs(dadaF, derepF, dadaR, derepR, minOverlap = $minOverlap, maxMismatch = $maxMismatch,
## currently not accessible by the wrapper    returnRejects = FALSE, propagateCol = character(0),
    justConcatenate = $justConcatenate, trimOverhang = $trimOverhang)

saveRDS(merged, file='$merged')
##For display in Galaxy this could be transposed (..but the user could also do it herself)
##write.table(merged, "$merged", quote=F, sep="\t", row.names = F, col.names = T)
    ]]></configfile>
    </configfiles>
    <inputs>
        <param argument="dadaF" type="data" format="dada2_dada" label="Dada results for forward reads"/>
        <param argument="derepF" type="data" format="dada2_derep" label="Dereplicated forward reads"/>
        <param argument="dadaR" type="data" format="dada2_dada" label="Dada results for reverse reads"/>
        <param argument="derepR" type="data" format="dada2_derep" label="Dereplicated reverse reads"/>
        <param argument="minOverlap" type="integer" value="12" min="0" label="Minimum length of the overlap"/>
        <param argument="maxMismatch" type="integer" value="0" min="0" label="Maximum number of mismatches"/>
        <param argument="justConcatenate" type="boolean" checked="false" truevalue="TRUE" falsevalue="FALSE" label="Concatenated rather than merge" help="The forward and reverse-complemented reverse read are concatenated rather than merged, with a 10 Ns spacer inserted between them"/>
        <param argument="trimOverhang" type="boolean" checked="false" truevalue="TRUE" falsevalue="FALSE" label="Trim overhangs" help="Overhangs are when the reverse read extends past the start of the forward read, and vice-versa, as can happen when reads are longer than the amplicon and read into the other-direction primer region"/>
    </inputs>
    <outputs>
        <data name="merged" format="dada2_mergepairs" label="${tool.name} on ${on_string}"/>
    </outputs>
    <tests>
        <test>
            <param name="dadaF" ftype="dada2_dada" value="dada_F3D0_R1.Rdata"/>
            <param name="derepF" ftype="dada2_derep" value="derepFastq_F3D0_R1.Rdata"/>
            <param name="dadaR" ftype="dada2_dada" value="dada_F3D0_R2.Rdata"/>
            <param name="derepR" ftype="dada2_derep" value="derepFastq_F3D0_R2.Rdata"/>
            <output name="merged" value="mergePairs_F3D0.Rdata" ftype="dada2_mergepairs" />
        </test>
        <!-- test non-default options -->
        <test>
            <param name="dadaF" ftype="dada2_dada" value="dada_F3D0_R1.Rdata"/>
            <param name="derepF" ftype="dada2_derep" value="derepFastq_F3D0_R1.Rdata"/>
            <param name="dadaR" ftype="dada2_dada" value="dada_F3D0_R2.Rdata"/>
            <param name="derepR" ftype="dada2_derep" value="derepFastq_F3D0_R2.Rdata"/>
            <output name="merged" value="mergePairs_F3D0_nondefault.Rdata" ftype="dada2_mergepairs" />
            <param name="minOverlap" value="8" />
            <param name="maxMismatch" value="1"/>
            <param name="justConcatenate" value="TRUE" />
            <param name="trimOverhang" value="TRUE" />
        </test>
    </tests>
    <help><![CDATA[
Description
...........

This function attempts to merge each denoised pair of forward and reverse reads, rejecting any pairs which do not sufficiently overlap (at least 12bp by default) or which contain too many (>0 by default) mismatches in the overlap region.

Usage
.....

**Input**

- dereplicated reads and learned error rates of the forward reads
- dereplicated reads and learned error rates of the reverse reads

**Output**

- a data set of type dada2_mergepairs (which is a RData file containing the output of dada2's mergePairs function).

Details
.......

@HELP_OVERVIEW@


    ]]></help>
    <expand macro="citations"/>
</tool>