#!/bin/bash

# Copyright (c) 2017, 2022 Oracle and/or its affiliates. All rights reserved.
# Licensed under the Universal Permissive License v 1.0 as shown at
# http://oss.oracle.com/licenses/upl.

# This utility assists with configuring iscsi storage on Oracle Cloud
# Infrastructure instances.  See the manual page for more information.

_PY3=/usr/bin/python3.6
_PY_CMD=oci_network_config_main.py
s_dir=`${_PY3} -c 'import os.path ; import oci_utils.impl ; print (os.path.dirname(oci_utils.impl.__file__))' 2>/dev/null`

declare COMMAND
declare cmd_line=""
declare -i post_operation_show=0
# included items. Can be a VNIC OCID, an IP address or a VLAN interface name.
declare -A INCLUDED_ITEMS
# excluded items. Can be a VNIC OCID, an IP address or a VLAN interface name.
declare -A EXCLUDED_ITEMS
# second IP address map indexed by VNIC ocid
declare -a SECONDARY_PRIVATE_IPS
declare -a SECONDARY_PRIVATE_VNICS
declare -i COUNT=0
# private ip when specified on --create-vnic or --configure action
declare PRIVATE_IP
declare VNIC_OCID
declare OCID_OR_IP

# former implementation of oci-network-config was mixing options and sub-commands.
# oci-network-config-main.py now expect proper command line like '<sub-command> <options>'
# translate the command line accordingly (as expected by new implementation)
# if first token does not start by '-' we consider that command line is following the new format

if [ "${1:0:1}" != '-' ]
then
  if [ $# -eq 0 ]
  then
   # former behavior : no option means '--show'
   exec ${_PY3} ${s_dir}/${_PY_CMD} show --compat-output
  fi
   # execute as is as the command line do not start with an option dash-<something>
   exec ${_PY3} ${s_dir}/${_PY_CMD} $@
fi


PARSED_ARGUMENTS=$(getopt -a  --quiet -o hsacde:n:rX:I:q --long help,show,create-vnic,nic-index:,ipv4,ipv6,detach-vnic:,add-private-ip,del-private-ip:,private-ip:,subnet:,vnic-name:,assign-public-ip,vnic:,auto,configure,deconfigure,ns,sshd,exclude:,include:,quiet -- "$@")
eval set -- "$PARSED_ARGUMENTS"
while :
do
    case "$1" in
        -s | --show)              if [ -z ${COMMAND} ]
                                  then
                                    COMMAND="show --compat-output"
                                  else
                                    # display information after operation. Used to be an option
                                    # change this to call ourself again with the show command
                                    post_operation_show=1
                                  fi
                                  shift
                                  ;;
        -a|--auto|-c|--configure) COMMAND="configure"; post_operation_show=1                                                      ; shift   ;;
        -d|--deconfigure)         COMMAND="unconfigure"; post_operation_show=1                                                    ; shift   ;;
        --create-vnic)            COMMAND="attach-vnic"; post_operation_show=1                                                    ; shift   ;;
        --detach-vnic)            COMMAND="detach-vnic"; OCID_OR_IP=$2 ; post_operation_show=1                                    ; shift 2 ;;
        --add-private-ip)         COMMAND="add-secondary-addr"; post_operation_show=1                                             ; shift   ;;
        --del-private-ip)         COMMAND="remove-secondary-addr" ; cmd_line="${cmd_line} --ip-address=$2"; post_operation_show=1 ; shift 2 ;;
        -X|--exclude)             if [ -z ${COMMAND} ]
                                  then
                                    COMMAND="show --compat-output"; 
                                    cmd_line="${cmd_line} --exclude $2"
                                  else
                                    EXCLUDED_ITEMS[${COMMAND}]+="$2"
                                  fi
                                  shift 2
                                  ;;
        -I|--include)             if [ -z ${COMMAND} ]
                                  then
                                    COMMAND="show --compat-output"; 
                                    cmd_line="${cmd_line} --include $2"
                                  else
                                    EXCLUDED_ITEMS[${COMMAND}]+="$2"
                                  fi
                                  shift 2
                                  ;;
        -q|--quiet)               cmd_line="${cmd_line} --quiet"                                           ; shift   ;;
        -e)                       SECONDARY_PRIVATE_IPS[$COUNT]+="$2"; COUNT=COUNT+1                       ; shift 2 ;;
        -n|--ns)                  cmd_line="${cmd_line} --namespace=$2"                                    ; shift 2 ;;
        -r|--sshd)                cmd_line="${cmd_line} --start-sshd"                                      ; shift   ;;
        --vnic)                   VNIC_OCID=$2                                                             ; shift 2 ;;
        --vnic-name)              cmd_line="${cmd_line} --name=$2"                                         ; shift 2 ;;
        --assign-public-ip)       cmd_line="${cmd_line} --assign-public-ip"                                ; shift   ;;
        --subnet)                 cmd_line="${cmd_line} --subnet=$2"                                       ; shift 2 ;;
        --nic-index)              cmd_line="${cmd_line} --nic-index=$2"                                    ; shift 2 ;;
        --private-ip)             PRIVATE_IP=$2                                                            ; shift 2 ;;
        --ipv4)                   echo ""; echo "--ipv4 ia an invalid option in compatible mode"; echo ""; COMMAND="usage"; post_operation_show=0; break ;;
        --ipv6)                   echo ""; echo "--ipv6 ia an invalid option in compatible mode"; echo ""; COMMAND="usage"; post_operation_show=0; break ;;
        --help)
                              if [ -z ${COMMAND} ]
                              then
                                COMMAND="usage"
                              else
                                # not displaying the overall usage but command specific one.
                                cmd_line="${cmd_line} --help"
                              fi
                              break
                              ;;
        # end of parsing , everything getopt did not understood is after that , we do not care in our case
        --) shift; break ;;
        *)                       COMMAND="usage"                             ; break   ;;

    esac
done

shift $((OPTIND-1))
read -r -a LEFT_OVERS <<<"$@"
# special case for -e option. former syntax was '-e IP VNIC'. This cannot be handle
# with getopt. i.e "oci-network-config -e 1.2.3.4 foo -e 5.6.7.8 bar" is
# parsed as: -e '1.2.3.4' -e '5.6.7.8' -- 'foo' 'bar'
# So we consider -e option to be without argument and we fetch left overs during a second pass
# IF we have parsed -e option VNIC ocid will be within LEFT_OVERS
for (( i=0; i<${#SECONDARY_PRIVATE_IPS[@]}; i++ ))
do
  cmd_line="$cmd_line --secondary-ip ${SECONDARY_PRIVATE_IPS[$i]} ${LEFT_OVERS[$i]}"
done

if [ -z "${COMMAND}" ]
then
    COMMAND="show"
    cmd_line="--compat-output"
fi

if [ -n "${OCID_OR_IP}" ]
then
  if [ ${OCID_OR_IP:0:6} == 'ocid1.' ]
  then
    cmd_line="${cmd_line} --ocid=${OCID_OR_IP}"
  else
    cmd_line="${cmd_line} --ip-address=${OCID_OR_IP}"
  fi
fi

if [ "${COMMAND}" == "attach-vnic" ]
then
  if [ -n "${PRIVATE_IP}" ]
  then
    cmd_line="${cmd_line} --ip-address=${PRIVATE_IP}"
  fi
elif [ "${COMMAND}" == "detach-vnic" ]
then
  if [ -n "${VNIC_OCID}" ]
  then
    cmd_line="$cmd_line --ocid=${VNIC_OCID}"
  fi
  if [ -n "${PRIVATE_IP}" ]
  then
    cmd_line="$cmd_line --ip-address=${PRIVATE_IP}"
  fi
# else
#   obsolete comment # if we have found --private-ip and --vnic we gonne add an ip to a vnic
#   if [ -n "${VNIC_OCID}" ] && [ -n "${PRIVATE_IP}" ]
#   then
#     force command to be
#    COMMAND="add-secondary-addr"
#    cmd_line="$cmd_line --ip-address=${PRIVATE_IP} --ocid=${VNIC_OCID}"
#   fi
elif [ "${COMMAND}" == "add-secondary-addr" ]
then
  # --vnic is an option for --add-private-ip only, the requirement for --private-ip is not necessary
  # and the --vnic option should only be required if there is more than 1 vnic.
  # if --vnic option specified, translate to --ocid optione
  if [ -n "${VNIC_OCID}" ]
  then
    cmd_line="$cmd_line --ocid=${VNIC_OCID}"
  fi
  if [ -n "${PRIVATE_IP}" ]
  then
    cmd_line="$cmd_line --ip-address=${PRIVATE_IP}"
  fi
# else
#  echo "_GT_ ${COMMAND} handled elsewhere"
fi

if [ ${EXCLUDED_ITEMS[${COMMAND}]+_} ] &&  [ -n "${EXCLUDED_ITEMS[${COMMAND}]}" ]
then
  for i in ${EXCLUDED_ITEMS[${COMMAND}]}
  do
    cmd_line="${cmd_line} --exclude ${i}"
  done
fi
if [ ${INCLUDED_ITEMS[${COMMAND}]+_} ] &&  [ -n "${INCLUDED_ITEMS[${COMMAND}]}" ]
then
  for i in ${INCLUDED_ITEMS[${COMMAND}]}
  do
    cmd_line="${cmd_line} --include ${i}"
  done
fi

if [ $post_operation_show -eq 1  ]
then
  ${_PY3} ${s_dir}/${_PY_CMD} $COMMAND ${cmd_line}
  # print things as we used to do : include system interface as table , vnic as list etc..
  if [ $? -eq 0 ]
  then
     exec ${_PY3} ${s_dir}/${_PY_CMD} show --compat-output
  fi
else
  exec ${_PY3} ${s_dir}/${_PY_CMD} $COMMAND ${cmd_line}
fi