#!/usr/bin/env bash

shopt -s lastpipe


export SHELL=bash

if [[ -z $PARUZ ]]; then

  if command -v paru >/dev/null 2>&1; then

    PARUZ=paru
  elif ! command -v pacman >/dev/null 2>&1; then
    echo "Neither paru nor pacman found. Is this Arch?" >&2
    exit 1
  elif [[ $EUID -eq 0 ]] || [[ -f /usr/bin/msys-2.0.dll ]]; then
    PARUZ=pacman
  else
    PARUZ='sudo pacman'
  fi
fi

__paruz_help() {
  PROG=$(basename "$0")
  cat >&2 <<EOF
Usage: $PROG [OPTS]

A fzf terminal UI for paru or pacman.

sudo is invoked automatically, if needed.

Multiple packages can be selected.

The package manager can be changed with the environment variables: PARUZ

Keybindings:
  TAB                    Select
  Shift+TAB              Deselect

OPTS:
  -h, --help             Print this message

  All other options are passed to the package manager.
  Default: -S (install)

Examples:
  paruz -S --nocleanafter

  paruz -R
  PARUZ=yay paruz
EOF

  exit 1
}

__fzf_preview() {
  $PARUZ --color=always -Si "$1" | grep --color=never -v '^ '
}

__paruz_list() {
  $PARUZ --color=always -Sl | sed -e 's: :/:; s/ unknown-version//'
}

# main


while [[ -n $1 ]]; do
  case $1 in
  -h | --help)
    __paruz_help
    ;;
  __fzf_preview)
    shift
    __fzf_preview "$@"
    ;;
  *)

    break
    ;;
  esac
  shift
done

ARGS=("$@")

if [[ ${#ARGS[@]} -eq 0 ]]; then
  ARGS=("-S")
fi

declare -a PICKS
__paruz_list |
  fzf \
    --multi \
    --ansi \

    --preview="'${BASH_SOURCE[0]}' __fzf_preview {1}" |
  readarray -t PICKS

if [[ ${#PICKS[@]} -eq 0 ]]; then
  exit 0

fi


declare -a PKGS
for PICK in "${PICKS[@]}"; do
  PKGS+=("${PICK%% *}")
done

exec $PARUZ "${ARGS[@]}" "${PKGS[@]}"