#!/bin/bash

#if [ -d cascade-make ] ; then
#  source cascade-make/lib/cascade-lib.bash GEXT_MARS . $*
#fi

_full_pyver_=$(python -V 2>&1 | grep -Po '(?<=Python )(.+)')
_pyver_=${_full_pyver_%%.*}

#_pyver_=${1-3} # default to Python v3

#if [ "x$1" = "x" ] ; then
#    echo "" >&2
#    echo "Usage: source ${BASH_SOURCE} 2|3" >&2
#    echo "  where '2' specifies Python v2 is to be used" >&2
#    echo "  where '3' specifies Python v3 is to be used" >&2
#    echo "" >&2
#    return 1
#fi



if [ "x$GEXT_MARS" = "x" ] ; then
  source ./setup.bash
fi

if [ ! -f "$GEXT_MARS_INSTALLED/virtualenv-python$_pyver_/bin/activate" ] ; then
    echo "" >&2
    echo "!!!!" >&2
    echo "! Failed to find:" >&2
    echo "!   $GEXT_MARS_INSTALLED/virtualenv-python$_pyver_/bin/activate" >&2
    echo "!" >&2
    echo "! Have you run:" >&2
    echo "!   ./CREATE-VEN-PYTHON$_pyver_.sh" >&2
    echo "!" >&2
    echo "! Followed by:" >&2
    echo "!   source $GEXT_MARS_INSTALLED/virtualenv-python$_pyver_/bin/activate" >&2
    echo "!!!!" >&2
    echo "" >&2

    # Uncomment the following if you want to stop everything immediately
    #
    # While it is commented out, it means the issue is flagged, but 
    # allows for the circumstance that the developer is (for some reason)
    # needing to make use of a version of pythno outside of the MARS_EXT arae
    # 
    # return 1

elif  [ "x$VIRTUAL_ENV" = "x" ] ; then
    # It exists, but it hasn't been activated 
    echo ""
    echo "****"
    echo "* Warning: To run"
    echo "*   ./CASCADE-MAKE.sh"
    echo "*"
    echo "* You first need to activate Python v$_pyver_ Virtual Env:"
    echo "*   source $GEXT_MARS_INSTALLED/virtualenv-python$_pyver_/bin/activate"
    echo "*"
    echo "* So you have a version of the python scripting language under user control"
    echo "* where the 'essentia' build can be installed as a site-package" 
    echo "****"
    echo ""
elif [ "$VIRTUAL_ENV" != "$GEXT_MARS_INSTALLED/virtualenv-python$_pyver_" ] ; then
    # A python virtual env is in play, but not the one for Python v$_pyver_ in the MARS_EXT area
    echo ""
    echo "****"
    echo "* Warning: VIRTUAL_ENV points to different location to the one in MARS_EXT"
    echo "*   VIRTUAL_ENV      = $VIRTUAL_ENV"
    echo "*   MARS_EXT python$_pyver_ = $GEXT_MARS_INSTALLED/virtualenv-python$_pyver_"
    echo "****"
    echo ""
fi

export GEXT_MARS_DEVEL=1