#!/bin/sh

. /lib/functions.sh

LEGACY_CFG="/etc/config/vhost_manager"
TARGET_CFG="/etc/config/vhosts"

[ -f "$LEGACY_CFG" ] || exit 0

# If new config already contains vhost entries, assume migration already done.
if uci -q show vhosts 2>/dev/null | grep -q '=vhost'; then
	exit 0
fi

# Ensure target config exists
if [ ! -f "$TARGET_CFG" ]; then
	cat <<'CFG' > "$TARGET_CFG"
config global 'global'
	option enabled '1'
	option auto_reload '1'
CFG
fi

ensure_global_section() {
	if ! uci -q get vhosts.global >/dev/null; then
		local g
		g=$(uci add vhosts global)
		uci rename vhosts.$g='global'
	fi
}

normalize_bool() {
	case "$1" in
		1|true|on|yes|enabled) echo "1" ;;
		*) echo "0" ;;
	esac
}

migrate_global() {
	local section="$1"
	local enabled auto_reload log_retention
	config_get enabled "$section" enabled
	config_get auto_reload "$section" auto_reload
	config_get log_retention "$section" log_retention

	ensure_global_section
	[ -n "$enabled" ] && uci set vhosts.global.enabled="$enabled"
	[ -n "$auto_reload" ] && uci set vhosts.global.auto_reload="$auto_reload"
	[ -n "$log_retention" ] && uci set vhosts.global.log_retention="$log_retention"
}

migrate_vhost() {
	local section="$1"
	local domain backend ssl auth auth_user auth_pass websocket
	config_get domain "$section" domain
	config_get backend "$section" backend
	config_get ssl "$section" ssl
	config_get auth "$section" auth
	config_get auth_user "$section" auth_user
	config_get auth_pass "$section" auth_pass
	config_get websocket "$section" websocket

	[ -n "$domain" ] || return
	[ -n "$backend" ] || return

	local tls_mode="off"
	if [ "$(normalize_bool "$ssl")" = "1" ]; then
		tls_mode="acme"
	fi

	local s
	s=$(uci add vhosts vhost)
	uci set vhosts.$s.domain="$domain"
	uci set vhosts.$s.upstream="$backend"
	uci set vhosts.$s.tls="$tls_mode"

	if [ "$(normalize_bool "$auth")" = "1" ]; then
		uci set vhosts.$s.auth="1"
		[ -n "$auth_user" ] && uci set vhosts.$s.auth_user="$auth_user"
		[ -n "$auth_pass" ] && uci set vhosts.$s.auth_pass="$auth_pass"
	else
		uci set vhosts.$s.auth="0"
	fi

	uci set vhosts.$s.websocket="$(normalize_bool "$websocket")"
	uci set vhosts.$s.enabled="1"
}

config_load vhost_manager
config_foreach migrate_global global
config_foreach migrate_vhost vhost
uci commit vhosts

mv "$LEGACY_CFG" "${LEGACY_CFG}.legacy" 2>/dev/null

exit 0