package application

import (
	"context"
	"fmt"
	"sort"
	"time"

	"git.coopgo.io/coopgo-apps/parcoursmob/core/utils/identification"
	"git.coopgo.io/coopgo-apps/parcoursmob/core/utils/sorting"
	filestorage "git.coopgo.io/coopgo-apps/parcoursmob/core/utils/storage"
	fleets "git.coopgo.io/coopgo-platform/fleets/grpcapi"
	fleetsstorage "git.coopgo.io/coopgo-platform/fleets/storage"
	groupsmanagement "git.coopgo.io/coopgo-platform/groups-management/grpcapi"
	"git.coopgo.io/coopgo-platform/groups-management/storage"
	mobilityaccounts "git.coopgo.io/coopgo-platform/mobility-accounts/grpcapi"
	mobilityaccountsstorage "git.coopgo.io/coopgo-platform/mobility-accounts/storage"
	"github.com/google/uuid"
	"github.com/rs/zerolog/log"
	"google.golang.org/protobuf/types/known/structpb"
	"google.golang.org/protobuf/types/known/timestamppb"
)

type VehiclesManagementOverviewResult struct {
	Vehicles    []fleetsstorage.Vehicle
	VehiclesMap map[string]fleetsstorage.Vehicle
	DriversMap  map[string]mobilityaccountsstorage.Account
	Bookings    []fleetsstorage.Booking
}

func (h *ApplicationHandler) GetVehiclesManagementOverview(ctx context.Context, groupID string) (*VehiclesManagementOverviewResult, error) {
	request := &fleets.GetVehiclesRequest{
		Namespaces: []string{"parcoursmob"},
	}
	resp, err := h.services.GRPC.Fleets.GetVehicles(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get vehicles: %w", err)
	}

	vehicles := []fleetsstorage.Vehicle{}
	bookings := []fleetsstorage.Booking{}
	vehiclesMap := map[string]fleetsstorage.Vehicle{}

	for _, vehicle := range resp.Vehicles {
		if h.filterVehicleByGroup(vehicle, groupID) {
			v := vehicle.ToStorageType()
			vehicleBookings := []fleetsstorage.Booking{}
			for _, b := range v.Bookings {
				log.Debug().Any("booking", b).Msg("debug")
				if b.Status() != fleetsstorage.StatusOld {
					if !b.Deleted {
						bookings = append(bookings, b)
					}
				}
				if b.Unavailableto.After(time.Now()) {
					vehicleBookings = append(vehicleBookings, b)
				}
			}
			v.Bookings = vehicleBookings
			vehicles = append(vehicles, v)
			vehiclesMap[v.ID] = v
		}
	}

	driversMap, _ := h.services.GetBeneficiariesMap()

	sort.Sort(sorting.VehiclesByLicencePlate(vehicles))
	sort.Sort(sorting.BookingsByStartdate(bookings))

	return &VehiclesManagementOverviewResult{
		Vehicles:    vehicles,
		VehiclesMap: vehiclesMap,
		DriversMap:  driversMap,
		Bookings:    bookings,
	}, nil
}

func (h *ApplicationHandler) filterVehicleByGroup(v *fleets.Vehicle, groupID string) bool {
	if groupID == "" {
		return false
	}

	for _, n := range v.Administrators {
		if n == groupID {
			return true
		}
	}
	return false
}

type VehiclesManagementBookingsListResult struct {
	VehiclesMap map[string]fleetsstorage.Vehicle
	DriversMap  map[string]mobilityaccountsstorage.Account
	Bookings    []fleetsstorage.Booking
	CacheID     string
}

func (h *ApplicationHandler) GetVehiclesManagementBookingsList(ctx context.Context, groupID, status, startDate, endDate string) (*VehiclesManagementBookingsListResult, error) {
	request := &fleets.GetVehiclesRequest{
		Namespaces:     []string{"parcoursmob"},
		IncludeDeleted: true,
	}
	resp, err := h.services.GRPC.Fleets.GetVehicles(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get vehicles: %w", err)
	}

	bookings := []fleetsstorage.Booking{}
	vehiclesMap := map[string]fleetsstorage.Vehicle{}

	// Parse start date filter
	var startdate time.Time
	if startDate != "" {
		if parsed, err := time.Parse("2006-01-02", startDate); err == nil {
			startdate = parsed
		}
	}

	// Parse end date filter
	var enddate time.Time
	if endDate != "" {
		if parsed, err := time.Parse("2006-01-02", endDate); err == nil {
			enddate = parsed.Add(24 * time.Hour) // End of day
		}
	}

	for _, vehicle := range resp.Vehicles {
		if h.filterVehicleByGroup(vehicle, groupID) {
			v := vehicle.ToStorageType()
			vehiclesMap[v.ID] = v
			for _, b := range v.Bookings {
				if v, ok := b.Data["administrator_unavailability"].(bool); !ok || !v {
					// Apply status filter
					if status != "" {
						bookingStatus := b.Status()
						statusInt := 0

						if b.Deleted {
							statusInt = -2 // Use -2 for cancelled to distinguish from terminated
						} else {
							statusInt = bookingStatus
						}

						// Map status string to int
						var filterStatusInt int
						switch status {
						case "FORTHCOMING":
							filterStatusInt = 1
						case "ONGOING":
							filterStatusInt = 0
						case "TERMINATED":
							filterStatusInt = -1
						case "CANCELLED":
							filterStatusInt = -2
						default:
							filterStatusInt = 999 // Invalid status, won't match anything
						}

						if statusInt != filterStatusInt {
							continue
						}
					}

					// Apply date filter (on startdate)
					if !startdate.IsZero() && b.Startdate.Before(startdate) {
						continue
					}
					if !enddate.IsZero() && b.Startdate.After(enddate) {
						continue
					}

					bookings = append(bookings, b)
				}
			}
		}
	}

	sort.Sort(sorting.BookingsByStartdate(bookings))

	cacheID := uuid.NewString()
	h.cache.PutWithTTL(cacheID, bookings, 1*time.Hour)

	driversMap, _ := h.services.GetBeneficiariesMap()

	return &VehiclesManagementBookingsListResult{
		VehiclesMap: vehiclesMap,
		DriversMap:  driversMap,
		Bookings:    bookings,
		CacheID:     cacheID,
	}, nil
}

func (h *ApplicationHandler) CreateVehicle(ctx context.Context, name, vehicleType, informations, licencePlate, kilometers string, automatic bool, address map[string]any, otherProperties map[string]any) (string, error) {
	g := ctx.Value(identification.GroupKey)
	if g == nil {
		return "", fmt.Errorf("no group found in context")
	}
	group := g.(storage.Group)

	dataMap := map[string]any{}
	if name != "" {
		dataMap["name"] = name
	}
	if address != nil {
		dataMap["address"] = address
	}
	if informations != "" {
		dataMap["informations"] = informations
	}
	if licencePlate != "" {
		dataMap["licence_plate"] = licencePlate
	}
	dataMap["automatic"] = automatic
	if kilometers != "" {
		dataMap["kilometers"] = kilometers
	}
	// Add other properties
	for key, value := range otherProperties {
		dataMap[key] = value
	}

	data, err := structpb.NewValue(dataMap)
	if err != nil {
		return "", fmt.Errorf("failed to create data struct: %w", err)
	}

	vehicle := &fleets.Vehicle{
		Id:             uuid.NewString(),
		Namespace:      "parcoursmob",
		Type:           vehicleType,
		Administrators: []string{group.ID},
		Data:           data.GetStructValue(),
	}

	request := &fleets.AddVehicleRequest{
		Vehicle: vehicle,
	}

	_, err = h.services.GRPC.Fleets.AddVehicle(ctx, request)
	if err != nil {
		return "", fmt.Errorf("failed to add vehicle: %w", err)
	}

	return vehicle.Id, nil
}

func (h *ApplicationHandler) GetVehicleTypes(ctx context.Context) ([]string, error) {
	return h.config.GetStringSlice("modules.fleets.vehicle_types"), nil
}

type VehicleDisplayResult struct {
	Vehicle       fleetsstorage.Vehicle
	Beneficiaries map[string]mobilityaccountsstorage.Account
}

func (h *ApplicationHandler) GetVehicleDisplay(ctx context.Context, vehicleID string) (*VehicleDisplayResult, error) {
	request := &fleets.GetVehicleRequest{
		Vehicleid: vehicleID,
	}

	resp, err := h.services.GRPC.Fleets.GetVehicle(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get vehicle: %w", err)
	}

	beneficiaries, err := h.services.GetBeneficiariesMap()
	if err != nil {
		return nil, fmt.Errorf("failed to get beneficiaries: %w", err)
	}

	vehicle := resp.Vehicle.ToStorageType()

	// Sort bookings by start date (most recent first)
	sort.Slice(vehicle.Bookings, func(i, j int) bool {
		return vehicle.Bookings[i].Startdate.After(vehicle.Bookings[j].Startdate)
	})

	return &VehicleDisplayResult{
		Vehicle:       vehicle,
		Beneficiaries: beneficiaries,
	}, nil
}

func (h *ApplicationHandler) UpdateBooking(ctx context.Context, bookingID, startdate, enddate, unavailablefrom, unavailableto string) error {
	booking, err := h.services.GetBooking(bookingID)
	if err != nil {
		return fmt.Errorf("failed to get booking: %w", err)
	}

	newbooking, _ := fleets.BookingFromStorageType(&booking)

	if startdate != "" {
		newstartdate, _ := time.Parse("2006-01-02", startdate)
		newbooking.Startdate = timestamppb.New(newstartdate)

		if newstartdate.Before(newbooking.Unavailablefrom.AsTime()) {
			newbooking.Unavailablefrom = timestamppb.New(newstartdate)
		}
	}

	if enddate != "" {
		newenddate, _ := time.Parse("2006-01-02", enddate)
		newbooking.Enddate = timestamppb.New(newenddate)

		if newenddate.After(newbooking.Unavailableto.AsTime()) || newenddate.Equal(newbooking.Unavailableto.AsTime()) {
			newbooking.Unavailableto = timestamppb.New(newenddate.Add(24 * time.Hour))
		}
	}

	if unavailablefrom != "" {
		newunavailablefrom, _ := time.Parse("2006-01-02", unavailablefrom)
		newbooking.Unavailablefrom = timestamppb.New(newunavailablefrom)
	}

	if unavailableto != "" {
		newunavailableto, _ := time.Parse("2006-01-02", unavailableto)
		newbooking.Unavailableto = timestamppb.New(newunavailableto)
	}

	request := &fleets.UpdateBookingRequest{
		Booking: newbooking,
	}

	_, err = h.services.GRPC.Fleets.UpdateBooking(ctx, request)
	return err
}

type BookingDisplayResult struct {
	Booking      fleetsstorage.Booking
	Vehicle      fleetsstorage.Vehicle
	Beneficiary  mobilityaccountsstorage.Account
	Group        storage.Group
	Documents    []filestorage.FileInfo
	FileTypesMap map[string]string
	Alternatives []any
}

func (h *ApplicationHandler) GetBookingDisplay(ctx context.Context, bookingID string) (*BookingDisplayResult, error) {
	booking, err := h.services.GetBooking(bookingID)
	if err != nil {
		return nil, fmt.Errorf("failed to get booking: %w", err)
	}

	beneficiary := mobilityaccountsstorage.Account{}
	if booking.Driver != "" {
		beneficiaryrequest := &mobilityaccounts.GetAccountRequest{
			Id: booking.Driver,
		}

		beneficiaryresp, err := h.services.GRPC.MobilityAccounts.GetAccount(ctx, beneficiaryrequest)
		if err != nil {
			return nil, fmt.Errorf("failed to get beneficiary: %w", err)
		}
		beneficiary = beneficiaryresp.Account.ToStorageType()
	}

	grouprequest := &groupsmanagement.GetGroupRequest{
		Id: booking.Vehicle.Administrators[0],
	}

	groupresp, err := h.services.GRPC.GroupsManagement.GetGroup(ctx, grouprequest)
	if err != nil {
		return nil, fmt.Errorf("failed to get group: %w", err)
	}

	alternativerequest := &fleets.GetVehiclesRequest{
		Namespaces:       []string{"parcoursmob"},
		Types:            []string{booking.Vehicle.Type},
		Administrators:   booking.Vehicle.Administrators,
		AvailabilityFrom: timestamppb.New(booking.Startdate),
		AvailabilityTo:   timestamppb.New(booking.Enddate.Add(24 * time.Hour)),
	}

	alternativeresp, err := h.services.GRPC.Fleets.GetVehicles(ctx, alternativerequest)
	if err != nil {
		log.Error().Err(err).Msg("failed to get alternative vehicles")
	}

	alternatives := []any{}
	for _, a := range alternativeresp.Vehicles {
		alternatives = append(alternatives, a.ToStorageType())
	}

	documents := h.filestorage.List(filestorage.PREFIX_BOOKINGS + "/" + bookingID)
	fileTypesMap := h.config.GetStringMapString("storage.files.file_types")

	return &BookingDisplayResult{
		Booking:      booking,
		Vehicle:      booking.Vehicle,
		Beneficiary:  beneficiary,
		Group:        groupresp.Group.ToStorageType(),
		Documents:    documents,
		FileTypesMap: fileTypesMap,
		Alternatives: alternatives,
	}, nil
}

func (h *ApplicationHandler) ChangeBookingVehicle(ctx context.Context, bookingID, newVehicleID string) error {
	booking, err := h.services.GetBooking(bookingID)
	if err != nil {
		return fmt.Errorf("failed to get booking: %w", err)
	}

	booking.Vehicleid = newVehicleID
	b, _ := fleets.BookingFromStorageType(&booking)

	request := &fleets.UpdateBookingRequest{
		Booking: b,
	}

	_, err = h.services.GRPC.Fleets.UpdateBooking(ctx, request)
	return err
}

func (h *ApplicationHandler) MakeVehicleUnavailable(ctx context.Context, vehicleID, unavailablefrom, unavailableto, comment, currentUserID string, currentUserClaims map[string]any) error {
	g := ctx.Value(identification.GroupKey)
	if g == nil {
		return fmt.Errorf("no group found in context")
	}
	currentGroup := g.(storage.Group)

	unavailablefromTime, _ := time.Parse("2006-01-02", unavailablefrom)
	unavailabletoTime, _ := time.Parse("2006-01-02", unavailableto)

	data := map[string]any{
		"comment":                      comment,
		"administrator_unavailability": true,
		"booked_by": map[string]any{
			"user": map[string]any{
				"id":           currentUserID,
				"display_name": currentUserClaims["display_name"],
			},
			"group": map[string]any{
				"id":   currentGroup.ID,
				"name": currentGroup.Data["name"],
			},
		},
	}

	datapb, err := structpb.NewStruct(data)
	if err != nil {
		return fmt.Errorf("failed to create data struct: %w", err)
	}

	booking := &fleets.Booking{
		Id:              uuid.NewString(),
		Vehicleid:       vehicleID,
		Unavailablefrom: timestamppb.New(unavailablefromTime),
		Unavailableto:   timestamppb.New(unavailabletoTime),
		Data:            datapb,
	}

	request := &fleets.CreateBookingRequest{
		Booking: booking,
	}

	_, err = h.services.GRPC.Fleets.CreateBooking(ctx, request)
	return err
}

func (h *ApplicationHandler) DeleteBooking(ctx context.Context, bookingID string) error {
	request := &fleets.DeleteBookingRequest{
		Id: bookingID,
	}

	_, err := h.services.GRPC.Fleets.DeleteBooking(ctx, request)
	return err
}

func (h *ApplicationHandler) GetBookingForUnbooking(ctx context.Context, bookingID string) (fleetsstorage.Booking, error) {
	request := &fleets.GetBookingRequest{
		Bookingid: bookingID,
	}

	resp, err := h.services.GRPC.Fleets.GetBooking(ctx, request)
	if err != nil {
		return fleetsstorage.Booking{}, fmt.Errorf("failed to get booking: %w", err)
	}

	return resp.Booking.ToStorageType(), nil
}

func (h *ApplicationHandler) UnbookVehicle(ctx context.Context, bookingID, motif, currentUserID string, currentUserClaims map[string]any, currentGroup any) error {
	group := currentGroup.(storage.Group)

	// Prepare deletion metadata (microservice will add deleted_at automatically)
	deletionMetadata := map[string]any{
		"deleted_by": map[string]any{
			"user": map[string]any{
				"id":           currentUserID,
				"display_name": currentUserClaims["first_name"].(string) + " " + currentUserClaims["last_name"].(string),
				"email":        currentUserClaims["email"],
			},
			"group": map[string]any{
				"id":   group.ID,
				"name": group.Data["name"],
			},
		},
		"reason": motif,
	}

	deletionMetadataPb, err := structpb.NewStruct(deletionMetadata)
	if err != nil {
		return fmt.Errorf("failed to create deletion metadata: %w", err)
	}

	// Use the microservice's delete endpoint with metadata
	deleteRequest := &fleets.DeleteBookingRequest{
		Id:               bookingID,
		DeletionMetadata: deletionMetadataPb,
	}

	_, err = h.services.GRPC.Fleets.DeleteBooking(ctx, deleteRequest)
	return err
}

type VehicleForUpdateResult struct {
	Vehicle      fleetsstorage.Vehicle
	VehicleTypes []string
}

func (h *ApplicationHandler) GetVehicleForUpdate(ctx context.Context, vehicleID string) (*VehicleForUpdateResult, error) {
	request := &fleets.GetVehicleRequest{
		Vehicleid: vehicleID,
	}

	resp, err := h.services.GRPC.Fleets.GetVehicle(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get vehicle: %w", err)
	}

	vehicleTypes := h.config.GetStringSlice("modules.fleets.vehicle_types")

	return &VehicleForUpdateResult{
		Vehicle:      resp.Vehicle.ToStorageType(),
		VehicleTypes: vehicleTypes,
	}, nil
}

func (h *ApplicationHandler) UpdateVehicle(ctx context.Context, vehicleID, name, vehicleType, informations, licencePlate, kilometers string, automatic bool, address map[string]any, otherProperties map[string]any) (string, error) {
	getRequest := &fleets.GetVehicleRequest{
		Vehicleid: vehicleID,
	}

	resp, err := h.services.GRPC.Fleets.GetVehicle(ctx, getRequest)
	if err != nil {
		return "", fmt.Errorf("failed to get vehicle: %w", err)
	}

	// Start with existing data to preserve all fields
	dataMap := resp.Vehicle.Data.AsMap()
	if dataMap == nil {
		dataMap = map[string]any{}
	}

	// Update with new values
	if name != "" {
		dataMap["name"] = name
	}
	if address != nil {
		dataMap["address"] = address
	}
	if informations != "" {
		dataMap["informations"] = informations
	}
	if licencePlate != "" {
		dataMap["licence_plate"] = licencePlate
	}
	if kilometers != "" {
		dataMap["kilometers"] = kilometers
	}
	dataMap["automatic"] = automatic
	// Add other properties
	for key, value := range otherProperties {
		dataMap[key] = value
	}

	data, err := structpb.NewValue(dataMap)
	if err != nil {
		return "", fmt.Errorf("failed to create data struct: %w", err)
	}

	updateRequest := &fleets.UpdateVehicleRequest{
		Vehicle: &fleets.Vehicle{
			Id:             vehicleID,
			Namespace:      resp.Vehicle.Namespace,
			Type:           vehicleType,
			Administrators: resp.Vehicle.Administrators,
			Data:           data.GetStructValue(),
		},
	}

	updateResp, err := h.services.GRPC.Fleets.UpdateVehicle(ctx, updateRequest)
	if err != nil {
		return "", fmt.Errorf("failed to update vehicle: %w", err)
	}

	return updateResp.Vehicle.Id, nil
}