#!/bin/bash
# connect to iot services
THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
source "$THIS_DIR/../tools/common.sh"

# proxy server and port
SERVER=${SERVER:-bj1.ob.ac.cn}
get_server_port()
{
    local tmp
    tmp=$(sha256sum <<< "$1" | tr -cd "[:digit:]")
    tmp=${tmp:0:4}
    echo $((tmp+36000))
}

# ssh
SSH_USERNAME=${SSH_USERNAME:-root}
_ssh()
{
    ssh -p $(get_server_port "$1") "$SSH_USERNAME@$SERVER"
}

# main
print_help()
{
    fmt_info "usage: $0 <command> <service> [options]"
    echo "available commands: ssh"
}

router()
{
    case $1 in
        -h|--help)
            print_help
            ;;
        ssh )
            _ssh "$2"
            ;;
        * )
            print_help
            fmt_fatal "unknown command: $1"
            ;;
    esac
}

router "${GOT_OPTS[@]}"