#!/bin/bash

set -exu -o pipefail

if [ "$#" -ne  3 ]; then
    echo "Usage: $0 localport grpcaddr grpcport"
    echo "localport: the host port to forward the envoy proxy docker"
    echo "grpcaddr, grpcport: the addr+port of the gRPC service."
    echo "  Must not be loopback addresses, to be routable from envoy Docker."
    exit 1
fi

readonly DOCKER_DIR="$(cd "$(dirname "$0")" && pwd)"

readonly ENVOY_PORT=$1
readonly GRPC_ADDR=$2
readonly GRPC_PORT=$3
readonly ASSETS_PORT="8080"

readonly CONFIG="version: '2'
services:
  front-envoy:
    build:
      context: ./envoy/
      dockerfile: Dockerfile
    ports:
      # Forward host port to docker
      - '$ENVOY_PORT:$ENVOY_PORT'
    environment:
      - GRPC_HOST=$GRPC_ADDR
      - GRPC_PORT=$GRPC_PORT
      # The docker port for envoy
      - ENVOY_PORT=$ENVOY_PORT
      # The host+port for the static assets server
      - ASSETS_HOST=127.0.0.1
      - ASSETS_PORT=$ASSETS_PORT
    mem_limit: 1000000000
    network_mode: 'host'
  back-static-assets:
    build:
      context: ./static-assets/
      dockerfile: Dockerfile
    environment:
      - PORT=$ASSETS_PORT
    ports:
      # Make the port availble to linked dockers but no need
      # to forward to host machine.
      - '$ASSETS_PORT:$ASSETS_PORT'
    mem_limit: 1000000000"

cd $DOCKER_DIR
echo "$CONFIG" | docker-compose -f - up --build