url_kitbase="https://www.gitea1.intx.com.au/jn/punkbin/raw/branch/master"

wdir="$(pwd)"; [ "$(pwd)" = "/" ] && wdir=""
case "$0" in
    /*) scriptpath="${0}";;
    *)  scriptpath="$wdir/${0#./}";;
esac
scriptdir="${scriptpath%/*}"
scriptdir=$(realpath $scriptdir)
scriptpath=$(realpath $scriptpath)
basename=$(basename "$scriptpath") #e.g fetchruntime.bash
scriptroot="${basename%.*}" #e.g "fetchruntime"


runtime_available=0
if [[ "$OSTYPE" == "linux"* ]]; then
    arch=$(uname -i)
    if [[ "$arch" == "x86_64"* ]]; then
        url="${url_kitbase}/linux-x86_64/tclkit-902-Linux64-intel-dyn"
        outdir="${scriptdir}/runtime/linux-x86_64"; mkdir -p $outdir
        output="${outdir}/tclkit-902-Linux64-intel-dyn"
        runtime_available=1
    elif [[ "$arch" == "arm"* ]]; then
        url="${url_kitbase}/linux-arm/tclkit-902-Linux64-arm-dyn"
        outdir="${scriptdir}/runtime/linux-arm"; mkdir -p $outdir
        output="${outdir}/tclkit-902-Linux64-arm-dyn"
        runtime_available=1
    fi
    if [[ "$runtime_available" -eq 1 ]]; then
        echo "Please ensure libxFt.so.2 is available"
        echo "e.g on Ubuntu: sudo apt-get install libxft2"
    fi
    os="linux"
elif [[ "$OSTYPE" == "darwin"* ]]; then
    os="macosx"
    #assumed to be Mach-O 'universal binaries' for both x86-64 and arm? - REVIEW
    url="${url_kitbase}/macosx/tclkit-902-Darwin64-dyn"
    outdir="${scriptdir}/runtime/macosx/"; mkdir -p $outdir
    output="${outdir}/tclkit-902-Darwin64-dyn"
    runtime_available=1
elif [[ "$OSTYPE" == "freebsd"* ]]; then
    os="freebsd"
elif [[ "$OSTYPE" == "dragonflybsd"* ]]; then
    os="dragonflybsd"
elif [[ "$OSTYPE" == "netbsd"* ]]; then
    os="netbsd"
elif [[ "$OSTYPE" == "win32" ]]; then
    os="win32"
    url="${url_kitbase}/win32-x86_64/tclsh902z.exe"
    outdir="${scriptdir}/runtime/win32-x86_64/"; mkdir -p $outdir
    output="${outdir}/tcsh902z.exe"
    runtime_available=1
elif [[ "$OSTYPE" == "msys" ]]; then
    echo MSYS
    os="win32"
    #use 'command -v' (shell builtin preferred over external which)
    interp = `ps -p $$ | awk '$1 != "PID" {print $(NF)}' | tr -d '()' | sed -E 's/^.*\/|^-//'`
    shellpath=`command -v $interp`
    shellfolder="${shellpath%/*}"    #avoid dependency on basename or dirname
    #"c:/windows/system32/" is quite likely in the path ahead of msys,git etc.
    #This breaks calls to various unix utils such as sed etc (wsl related?)
    export PATH="$shellfolder${PATH:+:${PATH}}"
    url="${url_kitbase}/win32-x86_64/tclsh902z.exe"
    outdir="${scriptdir}/runtime/win32-x86_64/tclsh902z.exe"; mkdir -p $outdir
    output="${outdir}/tclsh902z.exe"
    runtime_available=1
else
    #os="$OSTYPE"
    os="other"
fi

if [[ "$runtime_available" -eq 1 ]]; then
    #test win32
    echo "Attempting to download $url"
    #wget $url -O $output
    curl -SL --output "$output" "$url"
    if [[ $? -eq 0 ]]; then
        echo "File downloaded to $output"
        chmod +x $output
    else
        echo "Error: Failed to download to $output"
    fi
else 
    echo "No runtime currently available for $os"
fi