#!/usr/bin/env miaou-bash

# CONSTANTS

# FUNCTIONS

function hosted_upgrade {
  cat >&2 <<EOF
FAILURE:
You are running inside a container within the HOSTED miaou mode.
Perform the same action again underneath HOST machine!
EOF
  builtin exit 10
}

function development_upgrade {
  [[ "$MIAOU_BASH_MODE_OWNER" != "$USER" ]] &&
    >&2 echo "ERROR: development mode owned by: $MIAOU_BASH_MODE_OWNER" &&
    builtin exit 11

  cd "$MIAOU_BASH_DIR"/ || return 12 # should not happen
  [[ -n "$(git status --porcelain)" ]] &&
    >&2 echo 'ERROR: repository has uncommited changes!' &&
    builtin exit 12

  local git_output
  git_output=$(git pull 2>&1)
  if echo "$git_output" | grep -q 'up to date'; then
    echo already up-to-date
  else
    sudo_root
    sudo miaou lib/initiate.bash
  fi
}

function system_upgrade {
  local current latest
  current=$("$MIAOU_BASH_DIR"/bin/miaou-bash --version)
  latest=$("$MIAOU_BASH_DIR"/tools/wget_semver artcode miaou/miaou-bash)
  if [[ "$current" == "$latest" ]]; then
    echo "up-to-date version: $current"
  else
    echo "new version available: $latest"
    perform_upgrade
  fi
}

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

# MAIN

source "$MIAOU_BASH_DIR"/lib/functions.bash
fetch_mode
case "$MIAOU_BASH_MODE" in
hosted) hosted_upgrade ;;
development) development_upgrade ;;
system) system_upgrade ;;
esac