#!/bin/bash

# kf2-srv is a command line tool for managing a set of Killing Floor 2 servers.
# Copyright (C) 2019, 2020 GenZmeY
# mailto: genzmey@gmail.com
# 
# This file is part of kf2-srv.
#
# kf2-srv is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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/>.

function _kf2_srv_completions () # $1: BetaPostfix
{
	local GrpDir=":DEFINE_PREFIX:/share/kf2-srv/cmdgrp"
	local InsDir="/etc/kf2-srv/instances${1}"
	local KF2Srv=":DEFINE_PREFIX:/bin/kf2-srv${1}"
	
	function groups_list ()
	{
		find "$GrpDir"       \
			-mindepth 1      \
			-maxdepth 1      \
			-type d          \
			-printf "%f\n"
	}

	function commands_list () # $1: Command group
	{
		find "$GrpDir/$1"    \
			-mindepth 1      \
			-maxdepth 1      \
			-type f          \
			-printf "%f\n"
	}

	function instances_list ()
	{
		find "$InsDir"       \
			-mindepth 1      \
			-maxdepth 1      \
			-type d          \
			-printf "%f\n"
	}
	
	function command_usage_processing () # $1: Command group, $2: Command, $3: Current argument position
	{
		local CmdParams=$("$KF2Srv" "$1" "$2" "usage")
		local LocalPosition; ((LocalPosition = $3 - 2))
		
		local ParamIndex=0
		local LastParam
		for Param in $CmdParams
		do
			((ParamIndex++))
			if [[ "$ParamIndex" -eq "$LocalPosition" ]]; then
				if echo "$Param" | grep -Fq '<instance>'; then
					COMPREPLY=($(compgen -W "$(instances_list)" -- "${CURARG}"))
				fi
				return 0
			fi
			LastParam="$Param"
		done
		
		if echo "$LastParam" | grep -Fq '<instance>...'; then
			COMPREPLY=($(compgen -W "$(instances_list)" -- "${CURARG}"))
		fi
	}
	
	COMPREPLY=()
	CURARG="${COMP_WORDS[COMP_CWORD]}"
	
	case "${COMP_CWORD}" in
		1 ) COMPREPLY=($(compgen -W "$(groups_list)"                    -- "${CURARG}"))  ;;
		2 ) COMPREPLY=($(compgen -W "$(commands_list ${COMP_WORDS[1]})" -- "${CURARG}"))  ;;
		* ) command_usage_processing "${COMP_WORDS[1]}" "${COMP_WORDS[2]}" "${COMP_CWORD}";;
	esac
	
	return 0
}

function _kf2_srv_beta_completions ()
{
	_kf2_srv_completions "-beta"
}

complete -F _kf2_srv_completions kf2-srv
complete -F _kf2_srv_beta_completions kf2-srv-beta