#!/bin/bash

# Script to make it easy to tunnel into the currently running API instance on GCP
# so that you can debug the Node process, e.g. to set breakpoints (in dev!!), use the REPL,
# or do performance or memory profiling.

set -e

if [ -z "$1" ]; then
    echo "Usage: the first argument should be 'dev' or 'prod'"
    exit 1
fi

SERVICE_NAME="api"
SERVICE_GROUP="${SERVICE_NAME}-group"
ZONE="us-west1-c"
ENV=${1:-dev}

case $ENV in
    dev)
        GCLOUD_PROJECT=compass-130ba ;;
    prod)
        GCLOUD_PROJECT=compass-130ba ;;
    *)
        echo "Invalid environment; must be dev or prod."
        exit 1
esac

echo "Looking for API instance on ${GCLOUD_PROJECT} to talk to..."
INSTANCE_ID=$(gcloud compute instance-groups list-instances ${SERVICE_GROUP} --format="value(NAME)" --zone=${ZONE} --project=${GCLOUD_PROJECT})

echo "Forwarding debugging port 9229 to ${INSTANCE_ID}. Open chrome://inspect in Chrome to connect."
gcloud compute ssh ${INSTANCE_ID} \
       --project=${GCLOUD_PROJECT} \
       --zone=${ZONE} \
       -- \
       -NL 9229:localhost:9229