#!/usr/bin/env bash

NGINX_CONF=/etc/nginx/nginx.conf
NGINX_INGEST_CONF=/etc/nginx/nginx_ingest.conf
NGINX_RESTREAM_CONF=/etc/nginx/nginx_restream.conf
function mfcb { local val="$4"; "$1"; eval "$2[$3]=\$val;"; };
function val_ltrim { if [[ "$val" =~ ^[[:space:]]+ ]]; then val="${val:${#BASH_REMATCH[0]}}"; fi; };
function val_rtrim { if [[ "$val" =~ [[:space:]]+$ ]]; then val="${val:0:${#val}-${#BASH_REMATCH[0]}}"; fi; };
function val_trim { val_ltrim; val_rtrim; };

if [[ -z "${TYPE}" ]]; then
  NGINX_TYPE="ingest"
else
  if [[ $TYPE == "ingest" ]] || [[ $TYPE == "restream" ]]; then
    NGINX_TYPE="${TYPE}"
  else
    echo -e "Envvar TYPE must be either ingest or restream"
    exit 1
  fi
fi

if [[ $NGINX_TYPE == "ingest" ]]; then
  if [[ -z "${STREAM_KEY}" ]]; then
    NGINX_STREAM_KEY=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)
    echo -e "Stream Key: $NGINX_STREAM_KEY"
  else
    NGINX_STREAM_KEY="${STREAM_KEY}"
  fi
  sed 's@___STREAMKEY___@'"$NGINX_STREAM_KEY"'@' $NGINX_INGEST_CONF > $NGINX_CONF
else
  if [[ -z "${PUSH_URLS}" ]]; then
  echo -e "Envvar PUSH_URLS required"
  exit 1
  else
    readarray -c1 -C 'mfcb val_trim a' -td, <<<"$PUSH_URLS,"; unset 'a[-1]'; declare -a a;
    NGINX_PUSH_URLS=""
    for i in "${a[@]}"
    do
      :
      NGINX_PUSH_URLS=$NGINX_PUSH_URLS$'push '$i$'\n'
    done
    sed 's@___PUSH_DIRECTIVES___@'"$NGINX_PUSH_URLS"'@' $NGINX_RESTREAM_CONF > $NGINX_CONF
  fi
fi

nginx