#!/usr/bin/env bash
## CONSTANTS

#TODO: LATEST_TAG
# LATEST_TAG=$(curl -s https://git.artcode.re/api/v1/repos/miaou/miaou-bash/tags|grep -oPm1 '{"name":".*?",' | head -n1 | cut -d'"' -f4)
# https://git.artcode.re/miaou/miaou-bash/archive/0.3.109.tar.gz

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

## FUNCTIONS

function upgrade {
  echo UPGRADE
  execute_miaou_lib self-upgrade
}

function install {
  echo INSTALL
  MIAOU_BASH_DIR=/opt/miaou-bash
  export MIAOU_BASH_DIR

  local tempfile
  tempfile="/tmp/$(basename "$MAIN_TAR_GZ_URL")"
  curl -so "$tempfile" $MAIN_TAR_GZ_URL
  sudo tar -xzf "$tempfile" --directory "$(dirname "$MIAOU_BASH_DIR")"
  rm "$tempfile"
  execute_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
    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 execute_miaou_lib {
  sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/lib/"$1".bash
}

function sudo_root {
  [[ "$UID" -ne 0 ]] && sudo -vp 'SUDO privilege required: '
  true
}
## MAIN

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

set -Eeuo pipefail
assert_supported_distro
sudo_root
if once_installed; then upgrade; else install; fi