#!/bin/bash
#-----------------------------------------------------------------------------------------------------------------------------------
#
# Rx3 IP Host Update Bash Completion
#
# Copyright (C) 2025-2026 Arnaud G. GIBERT
# mailto:arnaud@rx3.net
#
# This is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see
# <https://www.gnu.org/licenses/>.
#
#-----------------------------------------------------------------------------------------------------------------------------------



#-----------------------------------------------------------------------------------------------------------------------------------
# IP Host Update Completion
#-----------------------------------------------------------------------------------------------------------------------------------

_ip_host_update_completion()
{
    local   cur="${COMP_WORDS[COMP_CWORD]}"
    local  prev="${COMP_WORDS[COMP_CWORD-1]}"
    local  opts="-h --help -V --version -v --verbose"

    local pos=0
    local   i

    COMPREPLY=()

    # Count non-option positional arguments already provided
    for (( i=1; i<COMP_CWORD; i++ ))
    do
        case "${COMP_WORDS[i]}" in
            -h|--help|-V|--version|-v|--verbose)
                ;;
            --)
                ;;
            -*)
                ;;
            *)
                pos=$(( pos + 1 ))
                ;;
        esac
    done

    # Complete options if current word starts with '-'
    if [[ "${cur}" == -* ]]
    then
        COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
        return 0
    fi

    # Complete positional arguments
    case "${pos}" in
        0)
            COMPREPLY=( $(compgen -W "$(getent hosts | awk '{print $3}' | grep -v '^$')" -- "${cur}") )
            ;;
        1)
            COMPREPLY=( $(compgen -W "$(named-checkconf -p 2>/dev/null | grep -oP 'zone\s+\"\K[^\"]+' | sort -u)" -- "${cur}") )
            ;;
        2)
            COMPREPLY=()
            ;;
        3)
            COMPREPLY=( $(compgen -W "60 300 600 3600 86400" -- "${cur}") )
            ;;
        *)
            COMPREPLY=()
            ;;
    esac

    return 0
}



complete -o filenames -F _ip_host_update_completion ip_host_update