package storage

import (
	"context"
	"fmt"

	"git.coopgo.io/coopgo-platform/solidarity-transport/types"
	"github.com/google/uuid"
	"github.com/rs/zerolog/log"
	"github.com/spf13/viper"
	"go.mongodb.org/mongo-driver/v2/bson"
	"go.mongodb.org/mongo-driver/v2/mongo"
	"go.mongodb.org/mongo-driver/v2/mongo/options"
)

type MongoDBCollections struct {
	DriversRegularAvailabilities *mongo.Collection
	Bookings                     *mongo.Collection
	DriverJourneys               *mongo.Collection
}

type MongoDBStorage struct {
	Client      *mongo.Client
	DbName      string
	Collections MongoDBCollections
}

func NewMongoDBStorage(cfg *viper.Viper) (MongoDBStorage, error) {
	var (
		mongodb_uri                            = cfg.GetString("storage.db.mongodb.uri")
		mongodb_host                           = cfg.GetString("storage.db.mongodb.host")
		mongodb_port                           = cfg.GetString("storage.db.mongodb.port")
		mongodb_dbname                         = cfg.GetString("storage.db.mongodb.db_name")
		mongodb_drivers_regular_availabilities = cfg.GetString("storage.db.mongodb.collections.drivers_regular_availabilities")
		mongodb_bookings                       = cfg.GetString("storage.db.mongodb.collections.bookings")
		mongodb_driver_journeys                = cfg.GetString("storage.db.mongodb.collections.driver_journeys")
	)

	if mongodb_uri == "" {
		mongodb_uri = fmt.Sprintf("mongodb://%s:%s/%s", mongodb_host, mongodb_port, mongodb_dbname)
	}

	client, err := mongo.Connect(options.Client().ApplyURI(mongodb_uri))
	if err != nil {
		return MongoDBStorage{}, err
	}

	log.Info().Str("regular availabilities", mongodb_drivers_regular_availabilities).Str("bookings", mongodb_bookings).Msg("mongodb collections")

	return MongoDBStorage{
		Client: client,
		DbName: mongodb_dbname,
		Collections: MongoDBCollections{
			DriversRegularAvailabilities: client.Database(mongodb_dbname).Collection(mongodb_drivers_regular_availabilities),
			Bookings:                     client.Database(mongodb_dbname).Collection(mongodb_bookings),
			DriverJourneys:               client.Database(mongodb_dbname).Collection(mongodb_driver_journeys),
		},
	}, nil
}

func (s MongoDBStorage) CreateDriverRegularAvailability(availability types.DriverRegularAvailability) error {
	if availability.ID == "" {
		availability.ID = uuid.NewString()
	}

	if _, err := s.Collections.DriversRegularAvailabilities.InsertOne(context.Background(), availability); err != nil {
		log.Error().Err(err).Msg("CreateDriverAvailability error")
		return err
	}

	return nil
}

func (s MongoDBStorage) CreateDriverRegularAvailabilities(availabilities []*types.DriverRegularAvailability) error {
	for _, availability := range availabilities {
		if availability.ID == "" {
			availability.ID = uuid.NewString()
		}
	}

	if _, err := s.Collections.DriversRegularAvailabilities.InsertMany(context.Background(), availabilities); err != nil {
		log.Error().Err(err).Msg("CreateDriverAvailabilities error")
		return err
	}

	return nil
}

func (s MongoDBStorage) DeleteDriverRegularAvailability(driverid string, availabilityid string) error {
	if _, err := s.Collections.DriversRegularAvailabilities.DeleteOne(context.Background(), bson.M{"_id": availabilityid, "driver_id": driverid}); err != nil {
		log.Error().Err(err).Msg("DeleteDriverRegularAvailability error")
		return err
	}
	return nil
}

func (s MongoDBStorage) GetDriverRegularAvailability(driverid string, availabilityid string) (*types.DriverRegularAvailability, error) {
	var result types.DriverRegularAvailability
	if err := s.Collections.DriversRegularAvailabilities.FindOne(context.Background(), bson.M{"_id": availabilityid, "driver_id": driverid}).Decode(&result); err != nil {
		log.Error().Err(err).Msg("GetDriverRegularAvailability - error")
		return nil, err
	}
	return &result, nil
}

func (s MongoDBStorage) GetDriverRegularAvailabilities(driverid string) ([]*types.DriverRegularAvailability, error) {
	result := []*types.DriverRegularAvailability{}

	cur, err := s.Collections.DriversRegularAvailabilities.Find(context.Background(), bson.M{"driver_id": driverid})
	if err != nil {
		log.Error().Err(err).Msg("GetDriverAvailabilities DB find - error")
		return nil, err
	}

	if err = cur.All(context.Background(), &result); err != nil {
		log.Error().Err(err).Msg("GetDriverAvailabilities cursor decoding - error")
		return nil, err
	}

	return result, nil
}

func (s MongoDBStorage) GetRegularAvailabilities(day int, timeInDay string) ([]*types.DriverRegularAvailability, error) {
	result := []*types.DriverRegularAvailability{}

	cur, err := s.Collections.DriversRegularAvailabilities.Find(context.Background(),
		bson.M{
			"day":        day,
			"start_time": bson.M{"$lt": timeInDay},
			"end_time":   bson.M{"$gt": timeInDay},
		})
	if err != nil {
		log.Error().Err(err).Msg("GetDriverAvailabilities DB find - error")
		return nil, err
	}

	if err = cur.All(context.Background(), &result); err != nil {
		log.Error().Err(err).Msg("GetDriverAvailabilities cursor decoding - error")
		return nil, err
	}

	return result, nil
}

func (s MongoDBStorage) PushDriverJourneys(driverjourneys []*types.DriverJourney) error {
	for _, journey := range driverjourneys {
		if journey.Id == "" {
			journey.Id = uuid.NewString()
		}
	}

	if _, err := s.Collections.DriverJourneys.InsertMany(context.Background(), driverjourneys); err != nil {
		log.Error().Err(err).Msg("PushDriverJourneys error")
		return err
	}
	return nil
}

func (s MongoDBStorage) GetDriverJourney(id string) (*types.DriverJourney, error) {
	var res types.DriverJourney
	err := s.Collections.DriverJourneys.FindOne(context.Background(), bson.M{"_id": id}).Decode(&res)
	if err != nil {
		return nil, err
	}

	return &res, nil
}

func (s MongoDBStorage) CreateBooking(booking types.Booking) error {
	if booking.Id == "" {
		booking.Id = uuid.NewString()
	}

	if _, err := s.Collections.Bookings.InsertOne(context.Background(), booking); err != nil {
		log.Error().Err(err).Msg("CreateBooking error")
		return err
	}

	return nil
}

func (s MongoDBStorage) GetAllBookings() ([]*types.Booking, error) {
	res := []*types.Booking{}

	cur, err := s.Collections.Bookings.Find(context.Background(), bson.M{})
	if err != nil {
		return nil, err
	}

	err = cur.All(context.Background(), &res)

	return res, err
}

func (s MongoDBStorage) GetBooking(id string) (*types.Booking, error) {
	var res types.Booking
	err := s.Collections.Bookings.FindOne(context.Background(), bson.M{"_id": id}).Decode(&res)
	if err != nil {
		return nil, err
	}

	return &res, nil
}

func (s MongoDBStorage) UpdateBookingStatus(bookingid string, newStatus string) error {
	// filter := bson.M{"_id": bookingid}
	replacement := bson.M{"$set": bson.M{"status": newStatus}}

	if _, err := s.Collections.Bookings.UpdateByID(context.Background(), bookingid, replacement); err != nil {
		return err
	}

	return nil
}