#!/usr/bin/env bash

## CONSTANTS

MAIN_TAR_GZ_URL="https://git.artcode.re/miaou/miaou-bash/archive/main.tar.gz"

## FUNCTIONS

function upgrade {
  source_miaou_lib self_upgrade
}

function install {
  [[ "$UID" -ne 0 ]] && sudo -vp 'SUDO privilege required: '

  MIAOU_BASH_DIR=/opt/miaou-bash
  export MIAOU_BASH_DIR
  cd /tmp

  curl -sO $MAIN_TAR_GZ_URL
  sudo tar -xzf main.tar.gz --directory $(dirname "$MIAOU_BASH_DIR")
  source_miaou_lib initiate

  source /etc/profile
  echo "miaou-bash successfully installed"
}

function assert_supported_distro {
  if ! grep -E '^ID=debian|^ID_LIKE=debian' /etc/os-release &&
    ! grep -E '^ID=arch|^ID_LIKE=arch' /etc/os-release; then
    local distro=$(grep -oP '^ID=\K(.*)' /etc/os-release)
    >&2 echo "unsupported GNU/Linux distribution: $distro"
    >&2 echo 'only debian-like OR arch-like currently supported'
    exit 2
  fi
}

function once_installed {
  [[ -v MIAOU_BASH_DIR && -d "$MIAOU_BASH_DIR" &&
    -L /etc/inputrc &&
    "$(readlink /etc/inputrc)" == "$MIAOU_BASH_DIR"/etc/inputrc ]]
}

function source_miaou_lib {
  . "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR/lib/"$1".bash"
}

## MAIN

# source <(curl -s https://git.artcode.re/miaou/miaou-bash/raw/branch/main/install2.sh)

set -Eeuo pipefail
assert_supported_distro
once_installed && upgrade || install