#curl -LO https://www.gitea1.intx.com.au/jn/punkshell/raw/branch/master/getpunk.cmd
#chmod +x getpunk.cmd

git_upstream="https://gitea1.intx.com.au/jn/punkshell.git"
#review - how can we test if another url such as ssh://git@pcm-gitea1.corp.intx.com.au:2222/jn/punkshell is actually the same repo, without cloning and comparing files/history?

if ! command -v git &> /dev/null; then
    echo "Git is not available. Please install git and ensure it is available on the path."
    exit 1
fi
wdir="$(pwd)"; [ "$(pwd)" = "/" ] && wdir=""
case "$0" in
    /*) scriptpath="${0}";;
    *)  scriptpath="$wdir/${0#./}";;
esac
scriptdir="${scriptpath%/*}"
echo "script: $0"
echo "pwd: $(pwd)"
echo "scriptdir: $scriptdir"
echo "scriptpath: $scriptpath"
scriptdir=$(realpath $scriptdir)
scriptpath=$(realpath $scriptpath)

basename=$(basename "$scriptpath")
scriptroot="${basename%.*}" #e.g "getpunk"

launchdir=$(pwd)
if [[ "$launchdir" != "$scriptdir" ]]; then
    echo "The current directory does not seem to be the folder in which the ${scriptroot} script is located."
    read -p "Do you want to use the current directory '${launchdir}' as the location for punkshell? (Y|N)"$'\n'"  Y - use launchdir ${launchdir}"$'\n'"  N - use script folder '${scriptdir}'"$'\n'"  (Any other value to abort): " answer
    if [[ "${answer^^}" == "Y" ]]; then
        punkfolder=$launchdir
    elif [[ "${answer^^}" == "N" ]]; then
        punkfolder=$scriptdir
    else 
        exit 1
    fi 
else
    punkfolder=$scriptdir
fi
cd $punkfolder

contentcount=$(ls -A | wc -l)
effectively_empty=0
if [ $contentcount == 0 ]; then
    effectively_empty=1
elif [[ ("$punkfolder" == "$scriptdir") && ("$contentcount" -lt 10) ]]; then
    #treat as empty if we have only a few files matching script root name
    count_scriptlike=$(ls ${scriptroot}.* | wc -l)
    if [ "$count_scriptlike" -eq $contentcount ]; then
        effectively_empty=1
    fi
fi

if  [ "$effectively_empty" -ne 1 ]; then
    if ! [ -d "$punkfolder/.git" ]; then
        echo "The folder '${punkfolder}' contains other items, and it does not appear to be a git project"
        echo "Please place this script in an empty folder which is to be the punkshell base folder."
        exit
    else
        repo_origin=$(git remote get-url origin)
        if [ "$repo_origin" != "$git_upstream" ]; then
            echo "The current repository origin '${repo_origin}' is not the expected upstream '${git_upstream}'"
            read -p "Continue anyway? (Y|N)" answer
            if [[ "${answer^^}" != "Y" ]]; then
                exit 1
            fi
        fi
    fi
fi

if ! [ -d "$punkfolder/.git" ]; then
    #set defaultbranch to master to suppress loud stderr 'hint' about initial branch name.
    git -c init.DefaultBranch=master init 
    git remote add origin $git_upstream
fi
git fetch origin
if [[ "$punkfolder" == "$scriptdir" ]]; then
    if [ -f $scriptroot.cmd ]; then
        cp -f $scriptroot.cmd $scriptroot.cmd.lastrun
        rm $scriptroot.cmd
    fi
fi
git pull $git_upstream master
git checkout $scriptroot.cmd
git branch --set-upstream-to=origin/master master

cd $launchdir #restore original CWD