package protogen

import (
	"github.com/golang/protobuf/proto"
	"google.golang.org/genproto/googleapis/api/annotations"
	"google.golang.org/protobuf/compiler/protogen"
	"google.golang.org/protobuf/types/descriptorpb"
)

const (
	METHOD_GET    = "GET"
	METHOD_POST   = "POST"
	METHOD_DELETE = "DELETE"
)

func GetProtoMethod(m *protogen.Method) (method string, path string) {
	if op, ok := m.Desc.Options().(*descriptorpb.MethodOptions); ok {
		if opts, err := proto.GetExtension(op, annotations.E_Http); err != nil {
			//log.Println(err)
		} else {
			if vv, ok := opts.(*annotations.HttpRule); ok {
				if vvv, ok := vv.Pattern.(*annotations.HttpRule_Get); ok {
					return METHOD_GET, vvv.Get
				} else if vvv, ok := vv.Pattern.(*annotations.HttpRule_Post); ok {
					return METHOD_POST, vvv.Post
				} else if vvv, ok := vv.Pattern.(*annotations.HttpRule_Delete); ok {
					return METHOD_DELETE, vvv.Delete
				}
			}
		}
	}
	return "", ""
}