package api

import (
	"encoding/json"
	"net"
	"regexp"
	"strings"

	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"

	pkgAuditCommon "dev.azure.com/schwarzit/schwarzit.stackit-public/audit-go.git/pkg/audit/common"
)

var objectTypeIdPattern = regexp.MustCompile(".*/(projects|folders|organizations)/([0-9a-fA-F-]{36})(?:/.*)?")

// GetCalledServiceNameFromRequest extracts the called service name from subdomain name
func GetCalledServiceNameFromRequest(request *pkgAuditCommon.ApiRequest, fallbackName string) string {
	if request == nil {
		return fallbackName
	}

	var calledServiceName = fallbackName
	host := request.Host
	ip := net.ParseIP(host)
	if ip == nil && !strings.Contains(host, "localhost") {
		dotIdx := strings.Index(host, ".")
		if dotIdx != -1 {
			calledServiceName = host[0:dotIdx]
		}
	}
	return calledServiceName
}

func GetObjectIdAndTypeFromUrlPath(path string) (
	string,
	*pkgAuditCommon.ObjectType,
	error,
) {

	// Extract object id and type from request url
	objectTypeIdMatches := objectTypeIdPattern.FindStringSubmatch(path)
	if len(objectTypeIdMatches) > 0 {
		objectType := pkgAuditCommon.ObjectTypeFromPluralString(objectTypeIdMatches[1])
		err := objectType.IsSupportedType()
		if err != nil {
			return "", nil, err
		}

		objectId := objectTypeIdMatches[2]

		return objectId, &objectType, nil
	}

	return "", nil, nil
}

// ResponseBodyToBytes converts a JSON or Protobuf response into a byte array
func ResponseBodyToBytes(response any) ([]byte, error) {
	if response == nil {
		return nil, nil
	}

	responseBytes, isBytes := response.([]byte)
	if isBytes {
		return responseBytes, nil
	}

	responseProtoMessage, isProtoMessage := response.(proto.Message)
	if isProtoMessage {
		responseJson, err := protojson.Marshal(responseProtoMessage)
		if err != nil {
			return nil, err
		}
		return responseJson, nil
	}

	responseJson, err := json.Marshal(response)
	if err != nil {
		return nil, err
	}
	return responseJson, nil
}

func ToArrayMap(input map[string]string) map[string][]string {
	output := map[string][]string{}
	for key, value := range input {
		output[key] = []string{value}
	}
	return output
}