#!/bin/bash

# Copyright: 2023 Virtuozzo International GmbH

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.



[ -n "${PYTHONCOMMONENGINELIB_VERSION:-}" ] && return 0;
PYTHONCOMMONENGINELIB_VERSION="0.1";

PYTHON27_DIR="/opt/jelastic-python27";
PYTHON33_DIR="/opt/jelastic-python33";
PYTHON34_DIR="/opt/jelastic-python34";
PYTHON35_DIR="/opt/jelastic-python35";

PYTHON_DEFAULT_CLI="/usr/bin/python";
PYTHON_DEFAULT_CONFIG="/usr/bin/python-config";
PYTHON_DEFAULT_PIP="/usr/bin/pip";
PYTHON_VIRTUALENV="/usr/bin/virtualenv";

WSGI_MODULE="/etc/httpd/modules/mod_wsgi.so";
$PROGRAM 'sed';


function switchEngine(){

        local engine_type=$1

        case $engine_type in
                "python2.7" )
                 local python_dir=$PYTHON27_DIR;
        ;;
                "python3.3" )
                 local python_dir=$PYTHON33_DIR;
        ;;
                "python3.4" )
                 local python_dir=$PYTHON34_DIR;
        ;;
	        "python3.5" )
                 local python_dir=$PYTHON35_DIR;
        ;;
        *)
        return 1
        esac
        
        [ -f /usr/bin/python2.6 ] && $SED -i 's/^#!\/usr\/bin\/python$/#!\/usr\/bin\/python2.6/g' /usr/bin/yum #YUM hack for Centos6;
	[ -f /usr/bin/python2.7 ] && $SED -i 's/^#!\/usr\/bin\/python$/#!\/usr\/bin\/python2.7/g' /usr/bin/yum && $SED -i 's/^#! \/usr\/bin\/python$/#! \/usr\/bin\/python2.7/g' /usr/libexec/urlgrabber-ext-down #YUM hack for Centos7;

        chown -R ${DATA_OWNER} "$PYTHON27_DIR" 2>>"$JEM_CALLS_LOG";
        chown -R ${DATA_OWNER} "$PYTHON33_DIR" 2>>"$JEM_CALLS_LOG";
        chown -R ${DATA_OWNER} "$PYTHON34_DIR" 2>>"$JEM_CALLS_LOG";
	chown -R ${DATA_OWNER} "$PYTHON35_DIR" 2>>"$JEM_CALLS_LOG";

        python_bin=$(set +f;ls -1 ${python_dir}/bin/pytho* | head -n 1)
        [ -L "$PYTHON_DEFAULT_CLI" ] && rm "$PYTHON_DEFAULT_CLI";
        [ -d "$python_dir" ] && ln -sf "${python_bin}" "$PYTHON_DEFAULT_CLI";

        python_pip=$(set +f;ls -1 ${python_dir}/bin/pip* | head -n 1)
        [ -L "$PYTHON_DEFAULT_PIP" ] && rm "$PYTHON_DEFAULT_PIP";
        [ -d "$python_dir" ] && ln -sf "${python_pip}" "$PYTHON_DEFAULT_PIP";
        
        python_virtualenv="${python_dir}/bin/virtualenv";
        [ -f "$python_virtualenv" ] && ln -sf "$python_virtualenv" "$PYTHON_VIRTUALENV";

        [ -L "$PYTHON_DEFAULT_CONFIG" ] && rm "$PYTHON_DEFAULT_CONFIG";
        [ -d "$python_dir" ] && ln -sf "${python_dir}/bin/python-config" "$PYTHON_DEFAULT_CONFIG";

        echo "${python_dir}/lib" >> /etc/ld.so.conf.d/jeastic_python.conf && ldconfig > /dev/null 2>&1;

        [ -L "$WSGI_MODULE" ] && rm $WSGI_MODULE;
        [ -f "${python_dir}/httpd/modules/mod_wsgi.so" ] && ln -sf "${python_dir}/httpd/modules/mod_wsgi.so" $WSGI_MODULE;

}


function describeSetVersion(){
        echo "\n\t<version>\tset python version";
}