#!/bin/bash
############################################################
# Decription: Preinst linux GMo cloned server from VMWare WS
# Author: Gilles Mouchet (gilles.mouchet@gmail.com)
# Creation Date: 29-Aug-2021
# Version: 3.1

#add entry 
#modify entry
#delete entry
#display entry

version="0.1"
#functions
# usage
usage() {
    cat << EOF
Usage: ./gest-host.sh options
Manage host file
Options:
    -a, --add an entry (-i -n mandatory for this option)
    -p, --print  display all entry
    -r, --remove    remove an entry
    -i, --ip      last two or three digit of ip address
    -H, --host    host name
    -h, --help    display this help text
    -v, --version    version
EOF
}
#------------------------------------------------------------------------------
# check error
check_error()
{
    if [ "$1" -ne "0" ]; then
        echo "[ERROR] - $2"
    fi
}
#------------------------------------------------------------------------------
# add host
add_host()
{
  # check if ip already exit
  echo "toto"
}

# db name
db_name=hosts.sqlite

# mapping from long options to short options
for arg in "$@"; do
  shift
  case "$arg" in
    "--add") set -- "$@" "-a" ;;
    "--ip") set -- "$@" "-i" ;;
    "--host") set -- "$@" "-H" ;;
    "--remove") set -- "$@" "-r" ;;
    "--update") set -- "$@" "-u" ;;
    "--domain") set -- "$@" "-d" ;;
    "--help") set -- "$@" "-h" ;;
    "--version") set -- "$@" "-v" ;;
    *) set -- "$@" "$arg"
  esac
done

# Utilisation de getopts pour les options courtes
while getopts ":a:i:rud:hv" opt; do
  option=${opt}
  case ${opt} in
    a)
      action=add
      ;;
    d)
      domain=$OPTARG
      case ${domain} in
          gmetech.net)
            ip_root=192.168.1.
          ;;
          gmolab.net)
            ip_root=172.31.10.
          ;;   
          *)
            echo "[ERROR] - $domain is not valid"
            usage
            exit 1
            ;;
      esac  
      ;;
    i)
      ip_last_digit=$OPTARG
      # check if it's a numbeer
      re='^[0-9]+$'
      if ! [[ $ip_last_digit =~ $re ]] ; then
          echo "[ERROR] - Not a number"
          exit 1
      fi
      if [[ $ip_last_digit -le 4 || $ip_last_digit -ge 255 ]]; then
          echo "Bad ip"
          exit 1
      else
          ip=${ip_root}${ip_last_digit}
      fi

      ;;
    r)
      action=remove
      ;;
    u)
      action=update
      ;;
    h)
      usage
      ;;
    f)
      file=$OPTARG
      ;;
    v)
      cat << EOF
gest-hosts $version
Copyright (C) 2021-`date +"%Y"` - GMo Free Software.
Written by Gilles Mouchet (gilles.mouchet@gmail.com)
EOF
      exit
      ;;
    \?)
      echo "Option invalide: -$OPTARG" >&2
      usage
      ;;
    :)
      echo "L'option -$OPTARG requiert un argument." >&2
      usage
      ;;
  esac
done
shift $((OPTIND -1))

# resume
echo "Domain = $domain"
echo "IP = $ip"

# Exemple de traitement des options
#if [ "$verbose" = true ]; then
#  echo "Mode verbeux activé"
#fi

#if [ -n "$file" ]; then
#  echo "Fichier spécifié: $file"
#fi

# Le reste de votre script ici...



# check if template exist

if [[ -z "${domain}" && "${option}" != "h" && "${option}" != "v" ]]; then
    echo "Domain is missing (-d)"
    usage
    exit 1
fi

# create sqlite db if not existe
if [ ! -f $db_name ]; then
    sqlite3 $db_name "create table hosts (id INTEGER PRIMARY KEY,ip TEXT,host TEXT,fqdn TEXT);"
    check_error $? "create database $db_name"
    sqlite3 $db_name "INSERT INTO hosts (ip,host,fqdn) VALUES ('192.168.1.1','router','router.gmetech.net')"
fi



# select domain


#echo $domain