#!/bin/bash

if [ ! $(which docker-machine) ]; then
    echo 'This script requires docker-machine'
    exit;
fi

# make sure docker is available
docker ps &> /dev/null
if [ $? -gt 0 ]; then
    echo "Error connecting to docker daemon"
    echo "Did you remember to start and select a docker machine?"
    echo '    eval $(docker-machine env dev)'
    exit 1;
fi

# find out some important numbers
host_machine_ip=192.168.99.1
docker_machine_ip=$(docker-machine ssh $DOCKER_MACHINE_NAME "ip -o -4 addr list docker0" | awk '{print $4}' | cut -d/ -f1)
karma_port=$(echo $1 | cut -d\: -f3 | cut -d/ -f1)

# punch a hole in the firewall
docker-machine ssh $DOCKER_MACHINE_NAME "sudo /usr/local/sbin/iptables -A PREROUTING -t nat -i docker0 -p tcp --dport $karma_port -j DNAT --to $host_machine_ip:$karma_port"

# change the karma url string and start the browser
karma_url=$(echo $1 | sed "s,127.0.0.1,$docker_machine_ip,g" | sed "s,localhost,$docker_machine_ip,g")

echo "Starting headless browser..."
exec docker run \
    --rm \
    -e KARMA_URL="$karma_url" \
    --name browser \
    relateiq/headlessbrowser:latest