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

named_containers_post_deploy() {
  declare desc="names deployed app container is consistent manner"
  local trigger="named_containers_post_deploy"
  local APP="$1"; local APP_ROOT="$DOKKU_ROOT/$APP"
  [[ -z $(stat -t "$APP_ROOT"/CONTAINER.* 2>/dev/null) ]] && exit 0
  local container
  for container in "$APP_ROOT"/CONTAINER.*; do
    local DYNO=$(echo "$container" | sed -r 's/.*CONTAINER\.(.*)/\1/') || true
    local NAME="$APP.$DYNO"
    local CURRENT_CONTAINER_ID="$(< "$container")"
    local PREVIOUS_CIDS=$(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
      local cid
      for cid in $PREVIOUS_CIDS; do
        local PREVIOUS_CONTAINER_STATUS=$(docker inspect -f '{{.State.Status}}' "$cid" || echo "dead")
        # dead containers cannot be renamed
        if [[ "$PREVIOUS_CONTAINER_STATUS" != "dead" ]]; then
          local CONTAINER_DATE_NAME="$NAME.$(date +%s)"
          dokku_log_info2_quiet "renaming container ($cid) ${NAME} to $CONTAINER_DATE_NAME"
          docker rename "$NAME" "$CONTAINER_DATE_NAME" > /dev/null
        fi
      done
    fi
    local ID=$(cat "$container")
    local CURRENT_NAME=$(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
}

named_containers_post_deploy "$@"