XSLT_1: Add missing node based on child element value - xslt-1.0

Question

could you please assist with solution below.
The sources files some times missing hole segment (which has child 'count' element with number 3). In this case I need to map all missing node segment and add some specific values.
Please see correct source xml file below which has all 'node' segments.
<?xml version="1.0" encoding="utf-8"?>
<root>
<group>
<node segment="1">
<count>2</count>
<value>value_2</value>
</node>
<node segment="1">
<count>3</count>
<value>value_3</value>
</node>
<node segment="1">
<count>1</count>
<value>value_1</value>
</node>
</group>
</root>
The below one doesn't have all segments in place.
<?xml version="1.0" encoding="utf-8"?>
<root>
<group>
<node segment="1">
<count>2</count>
<value>value_2</value>
</node>
<node segment="1">
<count>1</count>
<value>value_1</value>
</node>
</group>
</root>
Mising part is:
<node segment="1">
<count>3</count>
<value>value_3</value>
</node>
I have worked on xslt script below which doesn't give me the correct output results. Please assist
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="root/group[not(node/count='3')]">
<xsl:copy>
<xsl:apply-templates select="#*"/>
<node>
<count><xsl:value-of select="'some_results'"></xsl:value-of></count>
<value><xsl:value-of select="'some_results'"/></value>
</node>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="node[not(count='3')]">
<xsl:copy>
<xsl:apply-templates select="#*"/>
<count><xsl:value-of select="count"></xsl:value-of></count>
<value><xsl:value-of select="value"/></value>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
If element 'node' which has child element 'count'=3 present,- map as it is.
Otherwise the output would be:
<?xml version="1.0" encoding="utf-8"?>
<root>
<group>
<node segment="1">
<count>2</count>
<value>value_2</value>
</node>
<node segment="1">
<count>some_results</count>
<value>some_results</value>
</node>
<node segment="1">
<count>1</count>
<value>value_1</value>
</node>
</group>
</root>
Thanks,
Darius

Answer 1

Couldn't it be simply:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="group[not(node/count='3')]">
<xsl:copy>
<!-- add missing node-->
<node segment="1">
<count>some_results</count>
<value>some_results</value>
</node>
<!-- process existing nodes -->
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>