#!/bin/sh

# The MIT License (MIT)
#
# Copyright (c) 2026 pacman64
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


# ptui [options...]
#
# Podman Text User-Interface lets you run `podman` commands, picking options
# and images/containers interactively using `fzf`.
#
# It's always possible to cancel any command or item-picking, and do nothing
# as a result.
#
# The extra options are, available both in single and double-dash versions
#
#   -h, -help    show this help message


case "$1" in
    -h|--h|-help|--help)
        awk '/^# +ptui /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
        exit 0
    ;;

    --) shift ;;

    -*)
        printf "unsupported option '%s'\n" "$1" >&2
        exit 1
    ;;
esac

if ! command -v fzf > /dev/null; then
    printf "fzf (interactive picker) not found\n" >&2
    exit 2
fi

keys='ctrl-a:select-all,ctrl-space:toggle,F10:abort,F12:abort'
picker="fzf --reverse --header-first --header-lines=1 --bind ${keys}"

# choose top-level command

msg='Podman Text User-Interface (ptui): pick a podman command to run'
data="$(podman 2> /dev/null)"
[ -z "${data}" ] && exit 1

choice="$(echo "${data}" | grep '^  *[a-z]' | ${picker} --header="${msg}")"
[ -z "${choice}" ] && exit 1

choice1="$(echo "${choice}" | awk '{ print $1 }')"

case "${choice1}" in
    list|ls|ps)
        cmd="podman ${choice1}"
        printf "\033[7m%s\033[0m\n" "${cmd}"
        ${cmd}
        exit $?
    ;;
esac

# choose 2nd-level command

msg="Podman Text User-Interface (ptui): podman ${choice1}"
data="$(podman ${choice1} 2> /dev/null)"
[ -z "${data}" ] && exit 1

choice="$(echo "${data}" | grep '^  *[a-z]' | ${picker} --header="${msg}")"
[ -z "${choice}" ] && exit 1

choice2="$(echo "${choice}" | awk '{ print $1 }')"

case "${choice2}" in
    list|ls|ps)
        cmd="podman ${choice1} ${choice2}"
        printf "\033[7m%s\033[0m\n" "${cmd}"
        ${cmd}
        exit $?
    ;;
esac

# choose items to act on

msg="Podman Text User-Interface (ptui): podman ${choice1} ${choice2}"
data="$(podman ${choice1} ls 2> /dev/null)"
[ -z "${data}" ] && exit 1

targets="$(echo "${data}" | ${picker} -m --header="${msg}")"
[ -z "${targets}" ] && exit 1

# find which field/position is the ID, since these are shown in different
# places by default, depending on the subcommand
pos="$(
    echo "${data}" | awk '
        NR == 1 { for (i = 1; i <= NR; i++) if ($i == "ID") break }
        NR == 1 { print i - 1; exit }
    '
)"

ids="$(echo "${targets}" | awk -v pos="${pos}" '{ printf " %s", $pos }')"
[ -z "${ids}" ] && exit 1

cmd="podman ${choice1} ${choice2}${ids}"
printf "\033[7m%s\033[0m\n" "${cmd}"
${cmd}