#!/bin/bash

USERNAME=
PASSWORD=

DRILL_VER=drill-1.4.0
DRILL_LOC=/opt/mapr/drill
URL=jdbc:drill:

DPROP=~/prop$$

touch $DPROP
chmod 600 $DPROP

usage () {
    echo "$0 [ -u|--user username ]"
}

ask_user () {
    printf "Enter username: "
    read USERNAME
}

ask_pass () {
    stty -echo
    printf "Enter password for ${USERNAME}: "
    read PASSWORD
    stty echo
    printf "\n"
}

while :; do
    case $1 in
        -h|-\?|--help)
            usage
            exit
            ;;
        -u|--user)
            if [ -n "$2" ]; then
                USERNAME=$2
                shift
            else
                printf 'ERROR: "--user" requires a non-empty option argument.\n' >&2
                exit 1
            fi
            ;;
        --user=?*)
            USERNAME=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --)              # End of all options.
            shift
            break
            ;;
        -?*)
            printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
            ;;
        *)               # Default case: If no more options then break out of the loop.
            break
    esac

    shift
done

if [[ -z $USERNAME ]];
then
    ask_user
fi

if [[ -z $PASSWORD ]];
then
    ask_pass
fi

# Write properties file for Drill
cat >> $DPROP <<!
user=$USERNAME
password=$PASSWORD
url=$URL
!

# Exectue Drill connect with properties file. After 5 seconds, the command
# will delete the prop file. Note this may result in race condition.
# 5 seconds SHOULD be enough.
(sleep 5; rm $DPROP) & $DRILL_LOC/$DRILL_VER/bin/sqlline $DPROP