#!/bin/sh

set -e

config=/etc/caddy/config.json
base=/caddy_base.json
HTTPS_CERT_FILE="${HTTPS_CERT_FILE:-/certs/cert.pem}"
HTTPS_KEY_FILE="${HTTPS_KEY_FILE:-/certs/key.pem}"

# set defaults in base
ACTION_HOST="${ACTION_HOST:-backend}" ACTION_PORT="${ACTION_PORT:-9002}" \
PRESENTER_HOST="${PRESENTER_HOST:-backend}" PRESENTER_PORT="${PRESENTER_PORT:-9003}" \
AUTOUPDATE_HOST="${AUTOUPDATE_HOST:-autoupdate}" AUTOUPDATE_PORT="${AUTOUPDATE_PORT:-9012}" \
ICC_HOST="${ICC_HOST:-icc}" ICC_PORT="${ICC_PORT:-9013}" \
AUTH_HOST="${AUTH_HOST:-auth}" AUTH_PORT="${AUTH_PORT:-9004}" \
MEDIA_HOST="${MEDIA_HOST:-media}" MEDIA_PORT="${MEDIA_PORT:-9006}" \
MANAGE_HOST="${MANAGE_HOST:-manage}" MANAGE_PORT="${MANAGE_PORT:-9008}" \
CLIENT_HOST="${CLIENT_HOST:-client}" CLIENT_PORT="${CLIENT_PORT:-9001}" \
VOTE_HOST="${VOTE_HOST:-vote}" VOTE_PORT="${VOTE_PORT:-9013}" \
envsubst < "$base" > "$base.out" && mv -f "$base.out" "$base"

jq_write() {
  filter=$1
  jq "$filter" "$base" > "$base.out" && mv -f "$base.out" "$base"
}

### HTTPS ###
if [ -n "$ENABLE_LOCAL_HTTPS" ]; then
  [ -f "$HTTPS_CERT_FILE" ] && [ -f "$HTTPS_KEY_FILE" ] || {
    echo "ERROR: no local cert-files provided. Did you run make-localhost-cert.sh?"
    exit 1
  }
  jq_write ".apps.http.servers.srv0.tls_connection_policies = [{ certificate_selection: { any_tag: [ \"cert0\" ] }}]"
  jq_write ".apps.tls = { certificates: { load_files: [{ certificate: \"$HTTPS_CERT_FILE\", key: \"$HTTPS_KEY_FILE\", tags: [ \"cert0\" ] }] }}"
else
  if [ -n "$ENABLE_AUTO_HTTPS" ]; then
    if [ -n "$EXTERNAL_ADDRESS" ]; then
      echo "INFO: For the automatic https to work ports 443 and 80 of the host must be
  directed to 8000 and 8001 of this container"
      jq_write "del(.apps.http.servers.srv0.automatic_https)" # disabled in base
      jq_write ".apps.http.https_port = 8000"
      jq_write ".apps.http.http_port = 8001"
      jq_write ".apps.http.servers.srv0.routes[-1].match = [{ host: [\"$EXTERNAL_ADDRESS\"]}]"

      if [ -n "$ACME_ENDPOINT" ]; then
        jq_write ".apps.tls.automation.policies[0].issuers[0].ca = \"${ACME_ENDPOINT}\""
      fi
    else
      echo "ERROR: EXTERNAL_ADDRESS needed for automatic HTTPS / cert generation"
      exit 1
    fi
  fi
fi

mv "$base" "$config"

exec "$@"