#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"

APP="$1"; APP_ROOT="$DOKKU_ROOT/$APP"
[[ -z $(stat -t "$APP_ROOT"/CONTAINER.* 2>/dev/null) ]] && exit 0
for container in "$APP_ROOT"/CONTAINER.*; do
  DYNO=$(echo "$container" | sed -r 's/.*CONTAINER\.(.*)/\1/') || true
  NAME="$APP.$DYNO"
  CURRENT_CONTAINER_ID="$(< "$container")"
  PREVIOUS_CIDS=$(docker ps -a -q -f name="^.?$NAME\$" | xargs) || true
  if [[ -n $PREVIOUS_CIDS ]]; then
    dokku_log_info1_quiet "Found previous container(s) ($PREVIOUS_CIDS) named $NAME"
    # in case $PREVIOUS_CIDS has more than one entry
    for cid in $PREVIOUS_CIDS; do
      PREVIOUS_CONTAINER_STATUS=$(docker inspect -f '{{.State.Status}}' "$cid" || echo "dead")
      # dead containers cannot be renamed
      if [[ "$PREVIOUS_CONTAINER_STATUS" != "dead" ]]; then
        CONTAINER_DATE_NAME="$NAME.$(date +%s)"
        dokku_log_info2_quiet "renaming container ($cid) ${NAME} to $CONTAINER_DATE_NAME"
        docker rename "$NAME" "$CONTAINER_DATE_NAME" > /dev/null
      fi
    done
  fi
  ID=$(cat "$container")
  CURRENT_NAME=$(docker inspect -f '{{.Name}}' "$ID" | tr -d /)
  dokku_log_info2_quiet "renaming container (${ID:0:12}) $CURRENT_NAME to $NAME"
  docker rename "$CURRENT_NAME" "$NAME" > /dev/null
done