#!/usr/bin/env bash

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
#

if [ -z $PIO_HOME ] ; then
  PIO_FILE=$(readlink -f $0 2>/dev/null)
  if [ $? = 0 ] ; then
    export PIO_HOME="$(cd $(dirname $PIO_FILE)/..; pwd)"
  else
    CURRENT_DIR=`pwd`
    TARGET_FILE="$0"
    cd "$(dirname "$TARGET_FILE")"
    TARGET_FILE=$(basename "$TARGET_FILE")

    while [ -L "$TARGET_FILE" ]
    do
      TARGET_FILE=$(readlink "$TARGET_FILE")
      cd "$(dirname "$TARGET_FILE")"
      TARGET_FILE=$(basename "$TARGET_FILE")
    done

    export PIO_HOME="$(cd $(dirname "$TARGET_FILE")/..; pwd -P)"
    cd "$CURRENT_DIR"
  fi
fi

if [ -z $PIO_CONF_DIR ] ; then
  export PIO_CONF_DIR="${PIO_HOME}/conf"
  if [ ! -d $PIO_CONF_DIR ] ; then
    export PIO_CONF_DIR="/etc/predictionio"
    if [ ! -d $PIO_CONF_DIR ] ; then
      echo "PIO_CONF_DIR is not found."
      exit 1
    fi
  fi
fi

. ${PIO_HOME}/bin/load-pio-env.sh

if [[ "$1" == "--with-spark" ]]
then
  echo "Starting the PIO shell with the Apache Spark Shell."
  # Get paths of assembly jars to pass to spark-shell
  . ${PIO_HOME}/bin/compute-classpath.sh
  shift
  ${SPARK_HOME}/bin/spark-shell --jars ${ASSEMBLY_JARS} $@
elif [[ "$1" == "--with-pyspark" ]]
then
  echo "Starting the PIO shell with the Apache Spark Shell."
  # Get paths of assembly jars to pass to pyspark
  . ${PIO_HOME}/bin/compute-classpath.sh
  shift
  export PYTHONPATH=${PIO_HOME}/python
  ${SPARK_HOME}/bin/pyspark --jars ${ASSEMBLY_JARS} $@
else
  echo -e "\033[0;33mStarting the PIO shell without Apache Spark.\033[0m"
  echo -e "\033[0;33mIf you need the Apache Spark library, run 'pio-shell --with-spark [spark-submit arguments...]'.\033[0m"
  cd ${PIO_HOME}
  ./sbt/sbt console
fi