#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(dirname $0)/../common/functions"

generate_scale_file() {
  local APP="$1"; local DOKKU_SCALE_FILE="$DOKKU_ROOT/$APP/DOKKU_SCALE"
  copy_from_image "$APP" "/app/DOKKU_SCALE" "$DOKKU_ROOT/$APP" 2>/dev/null || dokku_log_info1_quiet "DOKKU_SCALE not found in app image"
  if [[ ! -f $DOKKU_SCALE_FILE ]]; then
    local TMP_WORK_DIR=$(mktemp -d DOKKU_SCALE.XXXXX)
    trap 'rm -rf $TMP_WORK_DIR' EXIT

    copy_from_image "$APP" /app/Procfile $TMP_WORK_DIR 2>/dev/null || true
    copy_from_image "$APP" /app/.release $TMP_WORK_DIR 2>/dev/null || true

    if [[ -f $TMP_WORK_DIR/Procfile ]];then
      local PROCFILE="$TMP_WORK_DIR/Procfile"
    elif [[ -f $TMP_WORK_DIR/.release ]];then
      local PROCFILE="$TMP_WORK_DIR/.release"
    else
      echo "default=1" >> $DOKKU_SCALE_FILE
    fi

    while read line || [ -n "$line" ]
    do
      local PROC_NAME=${line%%:*}
      local PROC_CMD=${line#*:}
      [[ "$PROC_NAME" =~ -.* ]] && continue
      [[ -n "$PROC_CMD" ]] && echo "$PROC_NAME=1" >> $DOKKU_SCALE_FILE
    done < "$PROCFILE"

    dokku_log_info1_quiet "New DOKKU_SCALE file generated"
    dokku_log_info1_quiet "$(< $DOKKU_SCALE_FILE)"
  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#*=}
    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
}