#!/bin/bash

# This script will generate a single config for a given host and privkey

# Limits:
# 253 peers 1 -> 254

# Lib
. /usr/local/bin/driglibash-base

# Arg parsing
if [ "$#" -ne 4 ] ; then
	die "Usage: $0 <name> <privkey_filepath> <port> <net_prefix>\nNet is a /24"
fi

thisname="$1"
privkey="$2"
port="$3"
net="$4"


# script

content="$(mktemp)"
clean "rm $content"

while IFS=";" read id name location isp note pubkey ip1 ip2 ip3 ip4 ip5 ; do
	# Skip header
	[ "$id" = "id" ] && continue

	# Add local config
	if [ "$name" = "$thisname" ] ; then
		cat <<-EOF
			[Interface] # $name
			PrivateKey = $(cat "$privkey")
			ListenPort = $port
			Address = $net.$id/32

		EOF
	else
		# Create list of endpoints
		endpoints=""
		for i in $(seq 1 5) ; do
			varname="ip$i"
			ip="${!varname}"
			echo "$ip" | grep -q ':' && ip="[$ip]"
			if [ -n "$ip" ] ; then
				endpoints="$endpoints"$'\n'"Endpoint = $ip:$port"
			fi
		done

		# Correct endpoint value or add keepalive for endpointless hosts
		if [ -n "$endpoints" ] ; then
			endpoints="${endpoints:1}"
		else
			endpoints="PersistentKeepalive = 30"
		fi

		# Peer config
		cat >> "$content" <<-EOF
			[Peer] # $name
			PublicKey = $pubkey
			AllowedIPs = $net.$id/32
			$endpoints

		EOF
	fi
done < $DOCKER_DIR/servers.csv

cat "$content"

rm "$content"