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

config_export() {
  local CONFIG_TYPE="$1"
  local APP="$2"
  local ENV_FILE="$DOKKU_ROOT/$APP/ENV"

  [[ $CONFIG_TYPE == "global" ]] && ENV_FILE="$DOKKU_ROOT/ENV"
  [[ ! -f $ENV_FILE ]] && return 0
  [[ ! -s $ENV_FILE ]] && return 0

  VARS=$(grep -Eo "export ([a-zA-Z_][a-zA-Z0-9_]*=.*)" $ENV_FILE | cut -d" " -f2-)
  echo "$VARS" | awk '{print "export " $0}'
  return 0
}

config_parse_args() {
  case "$2" in
    --global)
      ENV_FILE="$DOKKU_ROOT/ENV"
      DOKKU_CONFIG_TYPE="global"
      DOKKU_CONFIG_RESTART=false
      ;;
    --no-restart)
      APP="$3"
      ENV_FILE="$DOKKU_ROOT/$APP/ENV"
      DOKKU_CONFIG_RESTART=false
      DOKKU_CONFIG_TYPE="app"
      set -- "${@:1:1}" "${@:3}"
  esac

  APP=${APP:="$2"}
  ENV_FILE=${ENV_FILE:="$DOKKU_ROOT/$APP/ENV"}
  DOKKU_CONFIG_TYPE=${DOKKU_CONFIG_TYPE:="app"}
  DOKKU_CONFIG_RESTART=${DOKKU_CONFIG_RESTART:=true}

  if [[ "$DOKKU_CONFIG_TYPE" = "app" ]]; then
    if [[ -z $APP ]]; then
      dokku_log_fail "Please specify an app to run the command on"
    else
      verify_app_name "$2"
    fi
  fi
  export APP ENV_FILE DOKKU_CONFIG_TYPE DOKKU_CONFIG_RESTART
}

config_create () {
  local ENV_FILE=$1
  [[ -f $ENV_FILE ]] || touch $ENV_FILE
}

config_styled_hash () {
  local vars="$1"
  local prefix="$2"
  local longest=""

  while read -r word; do
    KEY=$(echo $word | cut -d"=" -f1)
    if [[ ${#KEY} -gt ${#longest} ]]; then
      longest=$KEY
    fi
  done <<< "$vars"

  while read -r word; do
    KEY=$(echo $word | cut -d"=" -f1)
    VALUE=$(echo $word | cut -d"=" -f2- | sed -e "s/^'//" -e "s/'$//" -e "s/\$$//g")

    num_zeros=$((${#longest} - ${#KEY}))
    zeros=" "
    while [[ $num_zeros -gt 0 ]]; do
      zeros="$zeros "
      num_zeros=$((num_zeros - 1))
    done
    echo "$prefix$KEY:$zeros$VALUE"
  done <<< "$vars"
}

config_write() {
  local ENV_TEMP="$1"
  local ENV_FILE_TEMP="${ENV_FILE}.tmp"

  echo "$ENV_TEMP" | sed '/^$/d' | sort > $ENV_FILE_TEMP
  if ! cmp -s $ENV_FILE $ENV_FILE_TEMP; then
    cp -f $ENV_FILE_TEMP $ENV_FILE
    chmod 600 $ENV_FILE
  fi
  rm -f $ENV_FILE_TEMP
}

is_config_export() {
  for var in "$@"; do
    if [[ "$var" == "--export" ]]; then
      return 0
    fi
  done
  return 1
}

config_all() {
  [[ "$1" == "config" ]] || set -- "config" "$@"
  config_parse_args "$@"
  config_create "$ENV_FILE"
  is_config_export "$@" && config_export "$DOKKU_CONFIG_TYPE" "$APP" && return 0

  [[ "$APP" ]] && DOKKU_CONFIG_TYPE=$APP
  [[ ! -s $ENV_FILE ]] && dokku_log_fail "no config vars for $DOKKU_CONFIG_TYPE"

  VARS=$(grep -Eo "export ([a-zA-Z_][a-zA-Z0-9_]*=.*)" $ENV_FILE | cut -d" " -f2-)

  for var in "$@"; do
    if [[ "$var" == "--shell" ]]; then
      echo $VARS
      return 0
    fi
  done

  dokku_log_info2_quiet "$DOKKU_CONFIG_TYPE config vars"
  config_styled_hash "$VARS"
}

config_get() {
  [[ "$1" == "config:get" ]] || set -- "config:get" "$@"
  config_parse_args "$@"

  if [[ -z $3 ]]; then
    echo "Usage: dokku config:get APP KEY"
    echo "Must specify KEY."
    exit 1
  fi

  config_create "$ENV_FILE"
  if [[ ! -s $ENV_FILE ]]; then
    return 0
  fi

  KEY="$3"

  grep -Eo "export ([a-zA-Z_][a-zA-Z0-9_]*=.*)" $ENV_FILE | grep "^export $KEY=" | cut -d"=" -f2- | sed -e "s/^'//" -e "s/'$//"
}

config_set() {
  [[ "$1" == "config:set" ]] || set -- "config:set" "$@"
  config_parse_args "$@"
  [[ "$2" = "--no-restart" ]] && set -- "${@:1:1}" "${@:3}"

  if [[ -z "${*:3}" ]]; then
    echo "Usage: dokku config:set APP KEY1=VALUE1 [KEY2=VALUE2 ...]"
    echo "Whitespaces need to be escaped, i.e. KEY=\"VAL\ WITH\ SPACES\""
    echo "Must specify KEY and VALUE to set."
    exit 1
  fi

  config_create "$ENV_FILE"
  ENV_ADD=""
  ENV_TEMP=$(cat "${ENV_FILE}")
  RESTART_APP=false
  shift 2

  for var; do
    if [[ $var != *"="* ]]; then
      echo "Usage: dokku config:set APP KEY1=VALUE1 [KEY2=VALUE2 ...]"
      echo "Whitespaces need to be escaped, i.e. KEY=\"VAL\ WITH\ SPACES\""
      echo "Must specify KEY and VALUE to set."
      exit 1
    fi
  done

  for var; do
    KEY=$(echo ${var} | cut -d"=" -f1)
    VALUE=$(echo ${var} | cut -d"=" -f2-)

    if [[ $KEY =~ [a-zA-Z_][a-zA-Z0-9_]* ]]; then
      RESTART_APP=true
      ENV_TEMP=$(echo "${ENV_TEMP}" | sed "/^export $KEY=/ d")
      ENV_TEMP="${ENV_TEMP}
export $KEY='$VALUE'"
      ENV_ADD=$(echo -e "${ENV_ADD}" | sed "/^$KEY=/ d")
      ENV_ADD="${ENV_ADD}$
${var}"
    fi
  done
  ENV_ADD=$(echo "$ENV_ADD" | tail -n +2) #remove first empty line

  if [[ $RESTART_APP ]]; then
    dokku_log_info1 "Setting config vars"
    config_styled_hash "$ENV_ADD" "       "

    config_write "$ENV_TEMP"
  fi

  if [[ "$DOKKU_CONFIG_RESTART" == "true" ]]; then
    dokku_log_info1 "Restarting app $APP"
    dokku ps:restart $APP
  fi
}

config_unset() {
  [[ "$1" == "config:unset" ]] || set -- "config:unset" "$@"
  config_parse_args "$@"
  [[ "$2" = "--no-restart" ]] && set -- "${@:1:1}" "${@:3}"

  if [[ -z $3 ]]; then
    echo "Usage: dokku config:unset APP KEY1 [KEY2 ...]"
    echo "Must specify KEY to unset."
    exit 1
  fi

  config_create "$ENV_FILE"
  ENV_TEMP=$(cat "${ENV_FILE}")
  VARS="${*:3}"

  for var in $VARS; do
    dokku_log_info1 "Unsetting $var"
    ENV_TEMP=$(echo "${ENV_TEMP}" | sed "/^export $var=/ d")

    config_write "$ENV_TEMP"
    [[ "$var" == "NO_VHOST" ]] && config_set --no-restart $APP NO_VHOST=0 && DOKKU_CONFIG_RESTART=true
  done

  if [[ "$DOKKU_CONFIG_RESTART" == "true" ]]; then
    dokku_log_info1 "Restarting app $APP"
    dokku ps:restart $APP
  fi

}