#!/bin/sh
# RPCD backend for SecuBox SMTP Relay

. /usr/share/libubox/jshn.sh
. /lib/functions.sh

CONFIG="smtp-relay"

# Source shared library if available
[ -f /usr/lib/secubox/mail/smtp-relay.sh ] && . /usr/lib/secubox/mail/smtp-relay.sh

case "$1" in
	list)
		cat << 'EOF'
{
	"get_status": {},
	"get_config": {},
	"test_email": {"recipient": "string"},
	"send_email": {"recipient": "string", "subject": "string", "body": "string"},
	"detect_local": {}
}
EOF
		;;

	call)
		case "$2" in
			get_status)
				if [ -f /usr/lib/secubox/mail/smtp-relay.sh ]; then
					smtp_relay_status
				else
					echo '{"error": "smtp-relay library not installed"}'
				fi
				;;

			get_config)
				json_init

				local enabled mode auto_detect
				enabled=$(uci -q get ${CONFIG}.main.enabled)
				mode=$(uci -q get ${CONFIG}.main.mode)
				auto_detect=$(uci -q get ${CONFIG}.main.auto_detect)

				json_add_boolean "enabled" "${enabled:-0}"
				json_add_string "mode" "${mode:-external}"
				json_add_boolean "auto_detect" "${auto_detect:-1}"

				# External settings
				json_add_object "external"
					json_add_string "server" "$(uci -q get ${CONFIG}.external.server)"
					json_add_int "port" "$(uci -q get ${CONFIG}.external.port || echo 587)"
					json_add_boolean "tls" "$(uci -q get ${CONFIG}.external.tls || echo 1)"
					json_add_boolean "ssl" "$(uci -q get ${CONFIG}.external.ssl || echo 0)"
					json_add_boolean "auth" "$(uci -q get ${CONFIG}.external.auth || echo 1)"
					json_add_string "user" "$(uci -q get ${CONFIG}.external.user)"
					local pwd_set=0
					[ -n "$(uci -q get ${CONFIG}.external.password)" ] && pwd_set=1
					json_add_boolean "password_set" "$pwd_set"
					json_add_string "from" "$(uci -q get ${CONFIG}.external.from)"
					json_add_string "from_name" "$(uci -q get ${CONFIG}.external.from_name)"
				json_close_object

				# Local settings
				json_add_object "local"
					json_add_string "server" "$(uci -q get ${CONFIG}.local.server)"
					json_add_int "port" "$(uci -q get ${CONFIG}.local.port || echo 25)"
				json_close_object

				# Recipients
				json_add_string "admin" "$(uci -q get ${CONFIG}.recipients.admin)"

				json_dump
				;;

			test_email)
				read -r input
				local recipient
				recipient=$(echo "$input" | jsonfilter -e '@.recipient' 2>/dev/null)

				json_init

				if [ -f /usr/lib/secubox/mail/smtp-relay.sh ]; then
					local output
					output=$(smtp_relay_test "$recipient" 2>&1)
					local code=$?

					if [ $code -eq 0 ]; then
						json_add_boolean "success" 1
						json_add_string "message" "Test email sent successfully"
					else
						json_add_boolean "success" 0
						json_add_string "error" "$output"
					fi
				else
					json_add_boolean "success" 0
					json_add_string "error" "smtp-relay library not installed"
				fi

				json_dump
				;;

			send_email)
				read -r input
				local recipient subject body
				recipient=$(echo "$input" | jsonfilter -e '@.recipient' 2>/dev/null)
				subject=$(echo "$input" | jsonfilter -e '@.subject' 2>/dev/null)
				body=$(echo "$input" | jsonfilter -e '@.body' 2>/dev/null)

				json_init

				if [ -z "$recipient" ] || [ -z "$subject" ]; then
					json_add_boolean "success" 0
					json_add_string "error" "recipient and subject are required"
					json_dump
					exit 0
				fi

				if [ -f /usr/lib/secubox/mail/smtp-relay.sh ]; then
					local output
					output=$(send_mail "$recipient" "$subject" "$body" 2>&1)
					local code=$?

					if [ $code -eq 0 ]; then
						json_add_boolean "success" 1
						json_add_string "message" "Email sent"
					else
						json_add_boolean "success" 0
						json_add_string "error" "$output"
					fi
				else
					json_add_boolean "success" 0
					json_add_string "error" "smtp-relay library not installed"
				fi

				json_dump
				;;

			detect_local)
				json_init

				local mailserver_enabled mailserver_ip detected responding
				mailserver_enabled=$(uci -q get mailserver.main.enabled)
				mailserver_ip=$(uci -q get mailserver.server.ip_address)
				[ -z "$mailserver_ip" ] && mailserver_ip=$(uci -q get mailserver.main.ip_address)

				detected=0
				responding=0

				if [ "$mailserver_enabled" = "1" ] && [ -n "$mailserver_ip" ]; then
					detected=1
					if nc -z "$mailserver_ip" 25 2>/dev/null; then
						responding=1
					fi
				fi

				json_add_boolean "detected" "$detected"
				json_add_boolean "responding" "$responding"
				json_add_string "ip" "${mailserver_ip:-}"

				json_dump
				;;

			*)
				echo '{"error": "Unknown method"}'
				;;
		esac
		;;
esac

exit 0