#!/bin/bash

os_level=`cat /etc/os-release |grep REDHAT_SUPPORT_PRODUCT_VERSION |awk -F= '{print $2}' |sed s/\"//g |awk -F. '{print $1}'`
python38="/opt/rh/rh-python38"
if [[ "$os_level" == 7 ]]
then
  if [[ -d  "$python38" ]]
  then
    ucampurestorage="/opt/rh/rh-python38/root/usr/local/bin/ucampurestorage"
  else
    echo "Python 3.8 is not installed as per the recommendatations"
  fi
else
ucampurestorage="/usr/local/bin/ucampurestorage"
fi

echo "Invoked with: $0 $@"
echo "My PID is $$"

###################################################################
# Purpose: usage information
###################################################################
function usage()
{
cat << EOF
usage: $0 options

This script creates a clone from an existing Pure storage volume.
The clone will be mapped to the local server and mounted on the specified mount point.

Restrictions for use:
  * The server must be connected to the Pure storage containing the source volume
  * The source volume must exist
  * The clone's mount point will be created if it doesn't exist

OPTIONS:
  -h                          Show this message
  -n clone_volume_name        Name of the new clone volume
  -s souce_volume_name        Name of the source volume from which the clone volume
                              will be created
  -w source_volume_wwn        WWN of the source volume from which the clone volume
                              will be created
  -p /path/to/mountpoint      Mount point of the newly cloned volume
  -k /path/to/secrets.json    Secrets file containing URL and credentials to access
                              the Pure storage

E.g.
1.  $0 -n clone_name -s source_name -p /t10 -k /path/to/secrets.json
2.  $0 -n clone_name -w 3624a9170a99a32b3267c47150005fa7a -p /t10 -k /path/to/secrets.json

NB.
1. /path/to/secrets.json must be in the following format:
{
  "client_id": "pure_api_client_id",
  "key_id": "pure_api_key_id",
  "client_name": "pure_api_client_name",
  "storage": "purestorage.cam.ac.uk",
  "user": "pureuser",
  "password": "purepassword",
  "keyfile": "private.pem"
}

2. ucampurestorage must be installed and located under /usr/local/bin/
EOF
}
###################################################################
# Parse the args
###################################################################

while getopts "h:n:s:w:p:k:" opt
do
  case $opt in
    h)
      usage
      exit
      ;;
    n)
      clone_name=$OPTARG
      ;;
    s)
      volume_name=$OPTARG
     ;;
    w)
      source_wwn=$OPTARG
     ;;
    p)
      t_mount_point=$OPTARG
      ;;
    k)
      secrets=$OPTARG
     ;;
    ?)
      usage
      exit
      ;;
  esac
done

# check required arguments
if [[ ( -z "$clone_name") || ( -z "$volume_name"  &&  -z "$source_wwn" )|| ( "$volume_name"  &&  "$source_wwn" ) || -z "$secrets" ]]
then
   usage
   exit
fi

# Call ucampurestorage package

if [ -z "$t_mount_point" ] && [ -z "$source_wwn" ]
then
  result=$($ucampurestorage --record_config True --file $secrets volume clone --name $clone_name --srcvol $volume_name )
elif [ -z "$t_mount_point" ] && [ -z "$volume_name" ]
then
  result=$($ucampurestorage --record_config True --file $secrets volume clone --name $clone_name --srcwwn $source_wwn )
x1elif [ ! -z "$t_mount_point" ] && [ -z "$volume_name" ]
then
  result=$($ucampurestorage --record_config True --file $secrets volume clone --name $clone_name --srcwwn $source_wwn --target_mp $t_mount_point)
elif [ ! -z "$t_mount_point" ] && [ -z "$source_wwn" ]
then
  result=$($ucampurestorage --record_config True --file $secrets volume clone --name $clone_name --srcvol $volume_name --target_mp $t_mount_point)
fi

if [[ $result == *"[Command succeeded - Returns True]"* ]]
then
    echo "Command succeeded."
    exit 0
else
    echo "Command failed. Please check the ucampurestorage log file in /var/log/ucampurestorage/."
    exit 1
fi
