package ipv4

import (
	"fmt"

	cuej "git.loafle.net/commons/util-go/encoding/json"
	omd "git.loafle.net/overflow/model/discovery"
	omm "git.loafle.net/overflow/model/meta"
	omu "git.loafle.net/overflow/model/util"
	"github.com/google/gopacket/layers"
)

func ScanService(port *omd.Port, ds *omd.DiscoverService, resultChan chan interface{}, errChan chan error, stopChan chan struct{}) {
	portNumber, err := cuej.NumberToInt(port.PortNumber)
	if err != nil {
		errChan <- fmt.Errorf("Discovery: Service scan port[%s] error %v ", port.PortNumber, err)
		return
	}

	switch omm.ToMetaPortTypeEnum(port.MetaPortType) {
	case omm.MetaPortTypeEnumTCP:
		if !scanServiceTCP(port, ds, resultChan, errChan, stopChan) {
			if dName, ok := layers.TCPPortNames[layers.TCPPort(portNumber)]; ok {
				description := fmt.Sprintf("Not Supported Service. Perhaps %s[%d]", dName, portNumber)
				s := &omd.Service{
					Key:            omm.MetaTargetServiceTypeEnumUNKNOWN.String(),
					Description:    description,
					DiscoveredDate: omu.NowPtr(),
					Port:           port,
					MetaCryptoType: omm.ToMetaCryptoType(omm.MetaCryptoTypeEnumUNKNOWN),
					Metadata:       nil,
				}
				resultChan <- s
			}
		}

	case omm.MetaPortTypeEnumUDP:
		if !scanServiceUDP(port, ds, resultChan, errChan, stopChan) {
			if dName, ok := layers.UDPPortNames[layers.UDPPort(portNumber)]; ok {
				description := fmt.Sprintf("Not Supported Service. Perhaps %s[%d]", dName, portNumber)
				s := &omd.Service{
					Key:            omm.MetaTargetServiceTypeEnumUNKNOWN.String(),
					Description:    description,
					DiscoveredDate: omu.NowPtr(),
					Port:           port,
					MetaCryptoType: omm.ToMetaCryptoType(omm.MetaCryptoTypeEnumUNKNOWN),
					Metadata:       nil,
				}
				resultChan <- s
			}
		}
	}

}