I am getting a :[ too many arguments error on line 28 if I do not specify a directory or file when running my code. Any suggestions as I am stuck here.

if [ $# -gt 1 ]; then
echo "Enter zero or one file"
echo "You must use a valid directory"
echo "Current directory is:" pwd
exit 0
fi
#Flag Variable
flag=1
#Code for no arguments
if [ $# -eq 0 ]; then
for filename in *
do
if [ -f $filename ]; then
linetest1='wc -l < $filename'
# Execution
if [ $flag -eq 1 ]; then
startline=$linetest1
startfile=$filename
flag=2
fi

#End Code Execution
if [ $startline -lt $linetest1 ]; then
startline=$linetest1
startfile=$filename
fi
fi
done
echo "File $startfile has the maximum number lines ($startline)."
exit 0
fi

#If only one Variable
if [ $# -eq 1 ]; then
cd $1
for filename in *
do
if [ -f $filename ]; then
linetest1='wc -l < $filename'
if [ $flag -eq 1 ]; then
startline=$linetest1
startfile=$filename
flag=2
fi
if [ $startline -lt $linetest1 ]; then
startline=$linetest1
startfile=$filename
fi
fi
done
echo "File $startfile has the maximum number lines ($startline)."
exit 0
fi



Thanks.