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

print_dokku_scale_file(){
  local APP="$1"; local DOKKU_SCALE_FILE="$DOKKU_ROOT/$APP/DOKKU_SCALE"
  while read line || [ -n "$line" ]
  do
    dokku_log_info2_quiet "$line"
  done < "$DOKKU_SCALE_FILE"
}

generate_scale_file() {
  local APP="$1"; local IMAGE_TAG="$3"; local IMAGE=$(get_app_image_name $APP $IMAGE_TAG); local DOKKU_SCALE_FILE="$DOKKU_ROOT/$APP/DOKKU_SCALE"
  verify_app_name "$APP"

  copy_from_image "$IMAGE" "/app/DOKKU_SCALE" "$DOKKU_ROOT/$APP" 2>/dev/null || true
  if [[ ! -f $DOKKU_SCALE_FILE ]]; then
    dokku_log_info1_quiet "DOKKU_SCALE file not found in app image. Defaulting to a single web process"
    echo "web=1" >> $DOKKU_SCALE_FILE

    dokku_log_info1_quiet "New DOKKU_SCALE file generated"

  else
    dokku_log_info1_quiet "DOKKU_SCALE file found"
    print_dokku_scale_file $APP
  fi
}

set_scale() {
  local APP="$1"; local DOKKU_SCALE_FILE="$DOKKU_ROOT/$APP/DOKKU_SCALE"
  shift 1
  local SCALE_SETTINGS=("$@")
  for procscale in "${SCALE_SETTINGS[@]}"; do
    PROC_NAME=${procscale%%=*}
    PROC_COUNT=${procscale#*=}
    is_number $PROC_COUNT || dokku_log_fail "ps:scale $PROC_COUNT is not a number"
    dokku_log_info1_quiet "Scaling $APP:$PROC_NAME to $PROC_COUNT"
    if (egrep -q ^${PROC_NAME}= $DOKKU_SCALE_FILE > /dev/null 2>&1);then
      sed --in-place "s:^${PROC_NAME}=.*:$PROC_NAME=$PROC_COUNT:g" $DOKKU_SCALE_FILE
    else
      echo "$PROC_NAME=$PROC_COUNT" >> $DOKKU_SCALE_FILE
    fi
  done
}