package grpcserver

import (
	"context"
	"fmt"
	"net"

	"git.coopgo.io/coopgo-platform/carpool-service/handler"
	"git.coopgo.io/coopgo-platform/carpool-service/servers/grpc/proto"
	"github.com/paulmach/orb/geojson"
	"github.com/rs/zerolog/log"
	"github.com/spf13/viper"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/reflection"
	"google.golang.org/grpc/status"
)

type CarpoolServiceServerImpl struct {
	Handler *handler.CarpoolServiceHandler

	proto.UnimplementedCarpoolServiceServer
}

func NewCarpoolServiceServer(handler *handler.CarpoolServiceHandler) *CarpoolServiceServerImpl {
	return &CarpoolServiceServerImpl{
		Handler: handler,
	}
}

func (s *CarpoolServiceServerImpl) CreateRegularRoutes(ctx context.Context, req *proto.CreateRegularRoutesRequest) (*proto.CreateRegularRoutesResponse, error) {
	log.Debug().Msg("grpc CarpoolService - CreateTrips")
	routes := []*geojson.FeatureCollection{}

	for _, r := range req.Routes {
		route, err := geojson.UnmarshalFeatureCollection([]byte(r.Serialized))
		if err == nil {
			routes = append(routes, route)
		}
	}

	if len(routes) == 0 {
		return nil, status.Errorf(codes.InvalidArgument, "no route to create")
	}

	if err := s.Handler.CreateRegularRoutes(routes); err != nil {
		return nil, status.Errorf(codes.Internal, "could not create routes in CreateRegularRoutes : %s", err.Error())
	}

	return &proto.CreateRegularRoutesResponse{}, nil
}

func (s *CarpoolServiceServerImpl) DeleteRegularRoutes(context.Context, *proto.DeleteRegularRoutesRequest) (*proto.DeleteRegularRoutesResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method DeleteTrips not implemented")
}

func (s *CarpoolServiceServerImpl) GetUserPlanning(ctx context.Context, req *proto.GetUserPlanningRequest) (*proto.GetUserPlanningResponse, error) {
	log.Debug().Msg("grpc CarpoolService - GetRegularUserRoutes")

	planned_schedules, err := s.Handler.GetUserPlanning(req.UserId, req.MinDepartureDate.AsTime(), req.MaxDepartureDate.AsTime())
	if err != nil {
		return nil, status.Errorf(codes.Internal, "could not get user planning : %s", err.Error())
	}

	results := map[string]*proto.CarpoolRoutesCollection{}

	for k, scheds := range planned_schedules {

		results[k] = &proto.CarpoolRoutesCollection{
			Collection: []*proto.CarpoolFeatureCollection{},
		}

		for _, s := range scheds {
			s.Route.ExtraMembers["departure_date"] = s.DepartureDate
			fcraw, _ := s.Route.FeatureCollection().MarshalJSON()
			results[k].Collection = append(results[k].Collection, &proto.CarpoolFeatureCollection{
				Serialized: string(fcraw),
			})
		}
	}

	return &proto.GetUserPlanningResponse{
		RoutesByDates: results,
	}, nil
}

func (s *CarpoolServiceServerImpl) DriverJourneys(context.Context, *proto.DriverJourneysRequest) (*proto.DriverJourneysResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method DriverJourneys not implemented")
}
func (s *CarpoolServiceServerImpl) PassengerJourneys(context.Context, *proto.PassengerJourneysRequest) (*proto.PassengerJourneysResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method PassengerJourneys not implemented")
}
func (s *CarpoolServiceServerImpl) DriverRegularTrips(context.Context, *proto.DriverRegularTripsRequest) (*proto.DriverRegularTripsResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method DriverRegularTrips not implemented")
}
func (s *CarpoolServiceServerImpl) PassengerRegularTrips(context.Context, *proto.PassengerRegularTripsRequest) (*proto.PassengerRegularTripsResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method PassengerRegularTrips not implemented")
}
func (s *CarpoolServiceServerImpl) CreateBooking(context.Context, *proto.CreateBookingRequest) (*proto.CreateBookingResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method CreateBooking not implemented")
}
func (s *CarpoolServiceServerImpl) UpdateBooking(context.Context, *proto.UpdateBookingRequest) (*proto.UpdateBookingResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method UpdateBooking not implemented")
}
func (s *CarpoolServiceServerImpl) GetBooking(context.Context, *proto.GetBookingRequest) (*proto.GetBookingResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method GetBooking not implemented")
}

func Run(done chan error, cfg *viper.Viper, handler *handler.CarpoolServiceHandler) {
	var (
		dev_env = cfg.GetBool("dev_env")
		address = ":" + cfg.GetString("services.grpc.port")
	)

	server := grpc.NewServer()
	proto.RegisterCarpoolServiceServer(server, NewCarpoolServiceServer(handler))
	l, err := net.Listen("tcp", address)
	if err != nil {
		log.Fatal().Err(err)
		return
	}

	if dev_env {
		reflection.Register(server)
	}

	if err := server.Serve(l); err != nil {
		fmt.Println("gRPC service ended")
		done <- err
	}
}