#!/bin/bash

# - VAR

# - Bash info
APPNAME=$(basename $0)
NAME="Check SpectraLink"
AUTHOR="Kalarumeth"
VERSION="v0.1"
URL="https://github.com/Kalarumeth"

# - Default settings for connection
COMMUNITY="public"
HOST_NAME="localhost"
SNMPVERSION="2c"

# - State Variables
STATE_OK=0
STATE_WARN=1
STATE_CRIT=2
STATE_UNK=3
STATE=$STATE_OK

# - OID

SL.OIDS() {
    OID_pUptime="1.3.6.1.2.1.1.3.0"	                        #String	    The uptime of SL.
}

# - MAIN CODE

Script.HostAlive() {
    for server in $HOST_NAME; do
        ping -c1 -W1 -q $server &>/dev/null
        if [[ $? != 0 ]] ; then
            printf "%s\n" "$server is unreachable"
            exit $STATE_UNK
        fi
    done
}

Script.SNMP() {
    snmpwalk -v $SNMPVERSION -c $COMMUNITY -r 1 -t 10 -Oev $HOST_NAME $1
}

SL.Main() {
    Script.HostAlive
    
    case $1 in
        uptime)
            SL.UpTime
            exit $STATE ;;
        *)
            echo "Unknown check!"
            Help.SL
            exit $STATE_UNK ;;
    esac
}

SL.GetData() {
    SL.OIDS

    case $1 in
        uptime)
            sysUptimeIstance=$(Script.SNMP $OID_pUptime | cut -d ')' -f 2 )
            ;;
    esac
}

# Device Information
SL.UpTime() {
    SL.GetData uptime

    printf "%s\n" "UpTime: $sysUptimeIstance"
}

# - HELP

Help.Main(){
    printf "%s\n" "OPTIONS:"
    printf "%s\t%s\t\t%s\n\t\t\t%s\n" "-t" "--type" "[REQUIRED OPTION] Field for select element to check." " { uptime } "
}

# - COMMAND LINE ENCODER

while test -n "$1"; do
    case "$1" in
        --host | -h)
            HOST_NAME=$2
            shift ;;
        --community | -c)
            COMMUNITY=$2
            shift ;;
        --type | -t)
            SL.Main $2
            shift ;;
        --help | -H)
            Help.Main ;;
        --version | -V)
            Help.Info
            exit $STATE ;;
        *)
            echo "Unknown argument: $1"
            print_help
            exit $STATE_UNK ;;
        esac
    shift
done

SL.Main