#!/usr/bin/env miaou-bash

# CONSTANTS

# FUNCTIONS

function self_upgrade {
  local backup="$MIAOU_BASH_DIR".before_upgrade
  mv "$MIAOU_BASH_DIR" "$backup"
  if "$backup"/install.sh upgraded; then
    rm -rf "$backup"
    echo -n "version: "
    . "$MIAOU_BASH_DIR"/bin/miaou-bash --version
  else
    echo "ERROR: trouble during self-upgrade: revert back"
    rm -rf "$MIAOU_BASH_DIR"
    mv "$backup" "$MIAOU_BASH_DIR"
  fi
}

#TODO: to remove
function safe_mode {
  if [[ ! -v MIAOU_BASH_DIR ]]; then
    >&2 echo 'WARNING: MIAOU_BASH_DIR undefined : safe-mode enabled'
    MIAOU_BASH_DIR=/opt/miaou-bash
    export MIAOU_BASH_DIR
  fi
}

# MAIN

safe_mode
source "$MIAOU_BASH_DIR"/lib/functions.bash
assert_system_mode
assert_root

current=$(miaou-bash --version)
latest=$("$MIAOU_BASH_DIR/tools/wget_semver" artcode miaou/miaou-bash)
if [[ "$current" == "$latest" ]]; then
  . "$MIAOU_BASH_DIR"/lib/initiate.bash
  echo "up-to-date version: $current"
else
  self_upgrade
fi