#!/bin/bash
bold=""
red=""
green=""
yellow=""
blue=""
normal=""

# {{{ usage_functions
usage_functions(){
	echo -n
}
# }}}
# {{{ human readable
human_readable() {
	size=${1}
	if [ ${size} -gt 1024 ] ; then
		if [ ${size} -gt $(( 1024*1024 )) ] ; then
			size="$(( ${size} / ( 1024*1024 ) )) MB"
		else
			size="$(( ${size} / 1024 )) kB"
		fi
	else
		size="${size} Byte"
	fi
	echo "${size}"
}
# }}}
# {{{ lvp_read
function lvp_read {
	var=$1
	shift
	default=${1}
	shift
	if [ ${LVP_USE_DEFAULTS} -eq 1 ] ; then
		echo "${@} ${default} (batch mode)"
		eval "${var}=\"${default}\""
		return
	fi
	eval "read -p \"${@}\" ${var}"
	return
}
# }}}
# {{{ confirm
function confirm {
	unset yesno
	if [ ${LVP_USE_DEFAULTS} -eq 1 ] ; then
		echo "${@} [yes|no] ? yes (batch mode)"
		yesno="yes"
	fi
	while [ "${yesno}" != "yes" -a "${yesno}" != "no" ] ; do
		echo -n "${@} [yes|no] ? "
		read yesno
	done
	[ "${yesno}" = "yes" ] && return 0
	return 1
}
# }}}

# {{{ menu_init
menu_init () {
	block_level=0
	items=0
}
# }}}
# {{{ block_start
block_start () {
	block_level=$(( ${block_level} + 2 ))
	echo "${@}"
}
# }}}
# {{{ block_end
block_end () {
	block_level=$(( ${block_level} - 2 ))
}
# }}}
# {{{ bool
bool () {
# bool LVPCFG_FOO 1 "This is Option FOO"
	items=$(( ${items} + 1 ))	
	eval "type_${items}=\"bool\""
	eval "option_${items}=\"${1}\""
	eval "value=\${${1}}"
	[ -z "${value}" ] && \
		eval "${1}=\"${2}\""
	eval "text_${items}=\"${3}\""
}
# }}}
# {{{ multi
multi () {
# multi LVPCFG_FOO default "This is Multioption FOO" foo default bar
	items=$(( ${items} + 1 ))
	eval "type_${items}=\"multi\""
	eval "option_${items}=\"${1}\""
	eval "value=\${${1}}"
	[ -z "${value}" ] && \
		eval "${1}=\"${2}\""
	eval "text_${items}=\"${3}\""
	shift; shift; shift
	eval "values_${items}=\"\""
	while [ ! -z "${1}" ] ; do
		eval "values_${items}=\"\${values_${items}} ${1}\""
		shift
	done
}
# }}}
# {{{ text
text () {
# text LVPCFG_FOO "default text" "This is textoption FOO"
	items=$(( ${items} + 1 ))
	eval "type_${items}=\"text\""
	eval "option_${items}=\"${1}\""
	eval "value=\${${1}}"
	[ -z "${value}" ] && \
		eval "${1}=\"${2}\""
	eval "text_${items}=\"${3}\""
}
# }}}
# {{{ comment
comment (){
	items=$(( ${items} + 1 ))
	eval "type_${items}=\"comment\""
	eval "text_${items}=\"${@}\""
}
# }}}
# {{{ display
display () {
	i=1
	while [ ${i} -le ${items} ] ; do
		eval "type=\${type_${i}}"
		case "${type}" in
			bool)
				eval "option=\${option_${i}}"
				eval "value=\${${option}}"
				desc="X"
				[ "${value}" == "0" ] && desc=" "
				eval "echo \"${i} - [${desc}] \${text_${i}}\""
				;;
			multi)
				eval "option=\${option_${i}}"
				eval "value=\${${option}}"
				eval "echo \"${i} - (${value}) \${text_${i}}\""
				;;
			text)
				eval "option=\${option_${i}}"
				eval "value=\${${option}}"
				dots="..."
				[ "${value:0:17}" == "${value}" ] && dots=""
				eval "echo \"${i} - (${value:0:17}${dots}) \${text_${i}}\""
				;;
			comment)
				eval "echo \"\${text_${i}}\""
				;;
			*)
				echo "${type} NOT IMPLEMENTED"
				;;
		esac
		i=$(( ${i} + 1 ))
	done
}
# }}}
# {{{ save
save () {
	i=1
	echo "# LVP Configuration" > .config
	while [ ${i} -le ${items} ] ; do
		eval "option=\${option_${i}}"
		eval "value=\${${option}}" 2>/dev/null
		eval "type=\${type_${i}}"
		case "${type}" in
			bool)
				echo "${option}=${value}" >>.config
				;;
			multi)
				echo "${option}=\"${value}\"" >>.config
				;;
			text)
				echo "${option}=\"${value}\"" >>.config
				;;
		esac
		i=$(( ${i} + 1 ))
	done
}
# }}}
# {{{ load
load () {
	. .config
}
# }}}
# {{{ get
get () {
# get 3
	eval "option=\${option_${1}}"
	if [ -z "${option}" ] ; then
		echo "${bold}${red}No such option: ${1}${normal}"
		sleep 1
		return
	fi
	eval "type=\${type_${1}}"
	case "${type}" in
		text)
			eval "value=\${${option}}"
			read -erp "Enter new value for ${option} [${value}]> " new
			[ ! -z "${new}" ] && eval "${option}=\"${new}\""
			;;
		multi)
			eval "value=\${${option}}"
			eval "values=\${values_${1}}"
			x=1
			for v in ${values} ; do
				[ "${value}" == "${v}" ] && echo -n "${bold}"
				echo "${x} - ${v}${normal}"
				eval "nval_${1}_${x}=\"${v}\""
				x=$(( ${x} + 1 ))
			done
			read -ep "Enter new value by number> " new
			[ -z "${new}" ] && return
			eval "new=\${nval_${1}_${new}}"
			if [ -z "${new}" ] ; then
				echo "${bold}${red}No such option!${normal}"
				sleep 1
				return
			else
				eval "${option}=\"${new}\""
			fi
			;;
		bool)
			eval "value=\${${option}}"
			if [ ${value} -eq 1 ] ; then
				eval "${option}=0"
			else
				eval "${option}=1"
			fi
			;;
		*)
			echo "${bold}${red}NOT IMPLEMENTED${normal}"
			sleep 1
			;;
	esac
}
# }}}