#!/bin/bash

# This script expects a mapping of services and ports in the SERVICES env var,
# with one line per service containing "NAME PORT".

generate_location() {
	# generate_location PATH URL
	echo -e "\t\tlocation $1 { proxy_pass $2; }"
}

LOCATIONS=$(
	echo "$SERVICES" | while read name port; do
		# restreamer is the catch-all
		[ "$name" == "restreamer" ] && generate_location / "http://restreamer:$port"
		# thrimshim takes any calls to thrimshim/
		[ "$name" == "thrimshim" ] && generate_location /thrimshim "http://thrimshim:$port"
		# thrimbletrimmer takes any calls to thrimbletrimmer/; serves content from /etc/nginx/html/thrimbletrimmer; requests to the plain URL get redirect to the dashboard page.
		[ "$name" == "thrimbletrimmer" ] && echo -e "\t\tlocation = / { return 301 \$scheme://\$host/thrimbletrimmer/dashboard.html; }\n\t\tlocation /thrimbletrimmer { }"
		# all services have metrics under /metrics/SERVICE, except for thrimebletrimmer
		[ "$name" != "thrimbletrimmer" ] && generate_location "/metrics/$name" "http://$name:$port/metrics"
	done
)

cat > /etc/nginx/nginx.conf <<EOF
worker_processes 1;

events {
	worker_connections 1024;
}

http {
	include /etc/nginx/mime.types;
	server {
		listen 80;
$LOCATIONS
	}
}
EOF