package transport

import (
	"context"
	"go.uber.org/zap"
	"google.golang.org/protobuf/types/known/timestamppb"
	"ms-auth/internal/storage"
	emailv1 "ms-auth/pkg/go/gen/email/v1"
	sessionv1 "ms-auth/pkg/go/gen/session/v1"
	userv1 "ms-auth/pkg/go/gen/user/v1"
	"net"
	"time"

	"google.golang.org/grpc"
)

type SessionServiceI interface {
	Create(ctx context.Context, handle, password string) (*string, error)
	Read(ctx context.Context, token string) (*int32, error)
	Update(ctx context.Context, token string) error
	Delete(ctx context.Context, token string) error
}

type UserServiceI interface {
	CreateUser(ctx context.Context, token, username, password string, email *string, expiresAt *time.Time, role *int32) (*int32, error)
	ReadUser(ctx context.Context, token string, id int32) (*storage.User, error)
	UpdateUser(ctx context.Context, token string, id int32, username *string, password *string, email *string, expiresAt *time.Time, role *int32) error
	DeleteUser(ctx context.Context, token string, id int32) error
}

type AuthServer struct {
	emailv1.UnimplementedEmailServiceServer

	sessionv1.UnimplementedSessionServiceServer
	sessionService SessionServiceI

	userv1.UnimplementedUserServiceServer
	userService UserServiceI

	gRPCServer *grpc.Server
	logger     *zap.Logger
}

// NewAuthServer creates a new instance of the AuthServer struct.
//
// Parameters:
// - sessionService: A pointer to the SessionServiceI interface.
// - gRPCServer: A pointer to the grpc.Server struct.
// - logger: A pointer to the zap.Logger struct.
//
// Returns:
// - *AuthServer: A pointer to the AuthServer struct.
func NewAuthServer(sessionService SessionServiceI, userService UserServiceI, gRPCServer *grpc.Server, logger *zap.Logger) *AuthServer {
	return &AuthServer{
		sessionService: sessionService,
		userService:    userService,
		gRPCServer:     gRPCServer,
		logger:         logger,
	}
}

// Start starts the AuthServer and listens on port :8090.
//
// It creates a listener on the specified address and starts serving incoming requests.
// It also logs the server start and any errors that occur during serving.
//
// No parameters.
// No return values.
func (s *AuthServer) Start() {
	lis, err := net.Listen("tcp", ":8090")
	if err != nil {
		s.logger.Fatal("")
	}

	sessionv1.RegisterSessionServiceServer(s.gRPCServer, s)
	go func() {
		s.logger.Info("Listening on :8090")
		if err := s.gRPCServer.Serve(lis); err != nil {
			panic(err.Error())
		}
	}()
	s.logger.Info("server started")
}

// GracefullyStop stops the server gracefully.
//
// No parameters.
// No return values.
func (s *AuthServer) GracefullyStop() {
	s.gRPCServer.GracefulStop()
	s.logger.Info("server stopped")
}

func AsTimeP(t *timestamppb.Timestamp) *time.Time {
	if t == nil {
		return nil
	}
	tt := t.AsTime()
	return &tt
}

func AsInt32P(v *userv1.Role) *int32 {
	if v == nil {
		return nil
	}
	vv := int32(v.Number())
	return &vv
}

func AsTimestampP(t *time.Time) *timestamppb.Timestamp {
	if t == nil {
		return nil
	}
	return timestamppb.New(*t)
}

func AsRoleP(r *int32) *userv1.Role {
	if r == nil {
		return nil
	}
	rr := userv1.Role(*r)
	return &rr
}