# -*-eselect-*-  vim: ft=eselect
# Copyright (c) 2006-2019 Gentoo Authors
#
# This file is part of the 'eselect' tools framework.
#
# eselect 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 2 of the License, or (at your option) any later
# version.
#
# eselect 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
# eselect.  If not, see <http://www.gnu.org/licenses/>.

DESCRIPTION="Manage OpenCASCADE implementation used by your system"
MAINTAINER="waebbl@gmail.com"
VERSION="1"

MODULE=opencascade
TARGET=${EROOT}/etc/env.d/51${MODULE}
CONFDIR=${EROOT}/etc/env.d/${MODULE}

inherit tests path-manipulation

find_implems() {
	local -a implems
	for file in "${CONFDIR}"/* ; do
		[[ -f ${file} ]] || continue
		implems=(${implems[@]} "${file##*/}")
	done
	echo ${implems[@]}
}

is_active() {
	local f
	[[ $# -eq 1 ]] || die "Need exactly 1 arguments!"
	[[ -L ${TARGET} ]] || return 1
	f=$(canonicalise ${TARGET})
	[[ -e ${f} ]] || return 1
	[[ ${f##*/} == ${1} ]]
}

# switch_implem $implem
# switches $iface combination to $implem
switch_implem() {
	[[ $# -eq 1 ]] || die "Need exactly 1 arguments!"
	$(is_active ${1}) && return
	[[ -L ${TARGET} ]] && rm -f ${TARGET}
	ln -s ${MODULE}/${1} ${TARGET}
	env-update
	echo "If you intend to use the selected opencascade in"
	echo "an already running shell, please remember to do:"
	echo
	echo ". /etc/profile"
}

describe_list() {
	echo "List available OpenCASCADE implementations"
}

do_list() {
	local implem i
	write_list_start "Installed $MODULE"
	for implem in $(find_implems) ; do
		(( i++ ))
		is_active ${implem##*/} \
			&& implem=$(highlight_marker "${implem}")
		write_numbered_list_entry $i "${implem}"
	done
}

describe_set() {
	echo "Activate one of the installed $MODULE implementations"
}

describe_set_parameters() {
	echo "<implementation>"
}

describe_set_options() {
	echo "implementation : implementation name or number (from 'list' action)"
}

do_set() {
	[[ $# -ne 1 ]] && die -q "Please specify exactly 1 implementation!"
	local -a implems

	implems=( $(find_implems) )
	
	if is_number ${1} ; then
		new_implem=${implems[$(( ${1} - 1 ))]}
	else
		new_implem=${1}
	fi
	echo $new_implem
	switch_implem ${new_implem}
}

describe_show() {
	echo "Print the currently active $MODULE implementation"
}

do_show() {
	local f n
	[[ -L ${TARGET} ]] || return 1
	f=$(canonicalise ${TARGET})
	[[ -f ${f} ]] || return 1
	echo ${f##*/}
}