package authz

import (
	"context"

	"github.com/authzed/authzed-go/v1"
	auth "github.com/envoyproxy/go-control-plane/envoy/service/auth/v3"
	xcontext "github.com/xlgmokha/x/pkg/context"
	"github.com/xlgmokha/x/pkg/log"
	"github.com/xlgmokha/x/pkg/x"
	"gitlab.com/gitlab-org/software-supply-chain-security/authorization/sparkled/pkg/pls"
	"google.golang.org/grpc"
	"google.golang.org/grpc/reflection"
)

var Connection xcontext.Key[*grpc.ClientConn] = xcontext.Key[*grpc.ClientConn]("grpc_client")
var Client xcontext.Key[*authzed.Client] = xcontext.Key[*authzed.Client]("authzed_client")

type Server struct {
	*grpc.Server
}

func New(ctx context.Context, options ...grpc.ServerOption) *Server {
	logger := log.From(ctx)

	server := grpc.NewServer(x.Prepend(
		options,
		grpc.UnaryInterceptor(pls.LogGRPC(logger)),
		grpc.StreamInterceptor(pls.LogGRPCStream(logger)),
	)...)

	auth.RegisterAuthorizationServer(server, authorizationServiceFor(ctx))
	reflection.Register(server)

	return &Server{
		Server: server,
	}
}

func authorizationServiceFor(ctx context.Context) auth.AuthorizationServer {
	connection := Connection.From(ctx)
	svcs := []auth.AuthorizationServer{NewLocalCheckService()}

	if x.IsPresent(connection) {
		pls.LogNow(ctx, log.Fields{"authzd": map[string]string{
			"target": connection.CanonicalTarget(),
			"state":  connection.GetState().String(),
		}})
		svcs = append(svcs, NewRemoteCheckService(auth.NewAuthorizationClient(connection)))
	}
	return NewCheckService(svcs)
}