#!/bin/bash
set -e

. /usr/share/debconf/confmodule

db_capb backup # allow to go back, for that we implement that STATE loop

debug()
{
    [ "${DEBCONF_DEBUG:-}" != "developer" ] || echo -e "D: $*" >&2
}

db_settitle neurodebian-repository/title

if [ "$1" = "configure" ]; then
    # Must have been called in preinst state, so no nd-aptenable
    # tool is yet installed, thus delay asking questions to
    # whenever will be called in postinst state
    which nd-aptenable 1>/dev/null 2>&1 || exit 0
fi

# Create temporary directory which will be reused
export ND_AE_TEMPDIR=$(mktemp -d)
trap "rm -rf \"$ND_AE_TEMPDIR\"" TERM INT EXIT

neurodebian_releases="auto"

# This implements a simple state machine so the back button can be handled.
# taken from debconf demo example
STATE=1
while [ "$STATE" != 0 -a "$STATE" != 8 ]; do
    case $STATE in
        1)
			export neurodebian_releases="$(ND_IFS=', ' nd-aptenable --print-releases)"
			debug "releases: $neurodebian_releases"
			db_subst neurodebian-repository/release releases "$neurodebian_releases"
			db_input medium neurodebian-repository/release || true
			;;
        2)
			export neurodebian_mirrors="$(ND_IFS=', ' nd-aptenable --print-mirrors)"
			debug "mirrors: $neurodebian_mirrors"
			db_subst neurodebian-repository/mirror mirrors "$neurodebian_mirrors"
			db_input medium neurodebian-repository/mirror || true
			mirror_selection_ret="$RET"
			debug "mirror select return: <$mirror_selection_ret>"
			;;
        3)  db_input medium neurodebian-repository/flavor || true ;;
        4)  db_input medium neurodebian-repository/components || true ;;
        5)  db_input low neurodebian-repository/overwrite || true ;;
        6)  db_input low neurodebian-repository/suffix || true ;;
        7)  db_input medium neurodebian-repository/run-update-note || true ;;
    esac

    if db_go; then
		case $STATE in
			2)
				db_metaget neurodebian-repository/mirror value
				selected_mirror="$RET"
				# TODOs:
				# - handle custom
				# - separate out alias from url
				debug "selected mirror: $selected_mirror"
				if [ "$selected_mirror" = "best" ] && ! which netselect &>/dev/null; then
					if [ "$mirror_selection_ret" = "30 question skipped" ]; then
						# if the question was not even shown, we would
						# not get a chance to specify mirror, thus
						# better just fail altogether and demand intervention
						db_input high neurodebian-repository/netselect-cannot-be-used
						exit 1
					else
						db_input high neurodebian-repository/netselect-not-found
						continue;
					fi
				fi
		esac
        STATE=$(($STATE + 1))
    else
        STATE=$(($STATE - 1))
    fi
done

db_stop