package ocss

import (
	"bytes"
	"encoding/json"
	"time"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/bsontype"
)

// CarpoolBookingStatus describes he state of the booking event
type CarpoolBookingStatus int64

const (
	CarpoolBookingWaitingConfirmation CarpoolBookingStatus = iota
	CarpoolBookingConfirmed
	CarpoolBookingCancelled
	CarpoolBookingCompletedPendingValidation
	CarpoolBookingValidated
)

var carpoolBookingStatustoID = map[string]CarpoolBookingStatus{
	"WAITING_CONFIRMATION":         CarpoolBookingWaitingConfirmation,
	"CONFIRMED":                    CarpoolBookingConfirmed,
	"CANCELLED":                    CarpoolBookingCancelled,
	"COMPLETED_PENDING_VALIDATION": CarpoolBookingCompletedPendingValidation,
	"VALIDATED":                    CarpoolBookingValidated,
}

var carpoolBookingStatustoString = map[CarpoolBookingStatus]string{
	CarpoolBookingWaitingConfirmation:        "WAITING_CONFIRMATION",
	CarpoolBookingConfirmed:                  "CONFIRMED",
	CarpoolBookingCancelled:                  "CANCELLED",
	CarpoolBookingCompletedPendingValidation: "COMPLETED_PENDING_VALIDATION",
	CarpoolBookingValidated:                  "VALIDATED",
}

func (s CarpoolBookingStatus) MarshalJSON() ([]byte, error) {
	buffer := bytes.NewBufferString(`"`)
	buffer.WriteString(carpoolBookingStatustoString[s])
	buffer.WriteString(`"`)
	return buffer.Bytes(), nil
}

func (s CarpoolBookingStatus) MarshalBSONValue() (bsontype.Type, []byte, error) {
	return bson.MarshalValue(carpoolBookingStatustoString[s])
}

func (bs *CarpoolBookingStatus) UnmarshalJSON(b []byte) error {
	var j string
	err := json.Unmarshal(b, &j)
	if err != nil {
		return err
	}
	// Note that if the string cannot be found then it will be set to the zero value, 'Created' in this case.
	*bs = carpoolBookingStatustoID[j]
	return nil
}

func (bs *CarpoolBookingStatus) UnmarshalBSON(t bsontype.Type, b []byte) error {
	var j string
	err := bson.Unmarshal(b, &j)
	if err != nil {
		return err
	}
	// Note that if the string cannot be found then it will be set to the zero value, 'Created' in this case.
	*bs = carpoolBookingStatustoID[j]
	return nil
}

type CarpoolBookingEventData struct {
	CarpoolBooking
	DriverCarpoolBooking
	PassengerCarpoolBooking
}

type CarpoolBookingEvent struct {
	ID      string                  `json:"id"`
	IDToken string                  `json:"idToken"`
	Data    CarpoolBookingEventData `json:"data"`
}

type CarpoolBooking struct {
	ID                     string               `json:"id" bson:"_id"`
	PassengerPickupDate    time.Time            `json:"passengerPickupDate" bson:"passengerPickupDate"`
	PassengerPickupLat     float64              `json:"passengerPickupLat" bson:"passengerPickupLat"`
	PassengerPickupLng     float64              `json:"passengerPickupLng" bson:"passengerPickupLng"`
	PassengerDropLat       float64              `json:"passengerDropLat" bson:"passengerDropLat"`
	PassengerDropLng       float64              `json:"passengerDropLng" bson:"passengerDropLng"`
	PassengerPickupAddress *string              `json:"passengerPickupAddress,omitempty" bson:"passengerPickupAddress,omitempty"`
	PassengerDropAddress   *string              `json:"passengerDropAddress,omitempty" bson:"passengerDropAddress,omitempty"`
	Status                 CarpoolBookingStatus `json:"status"`
	Distance               *int64               `json:"distance,omitempty" bson:"distance,omitempty"`
	Duration               *time.Duration       `json:"duration,omitempty" bson:"duration,omitempty"`
	WebUrl                 string               `json:"webUrl" bson:"webUrl"`
}

type PassengerCarpoolBooking struct {
	Passenger User `json:"passenger"`
}

type DriverCarpoolBooking struct {
	Driver User  `json:"driver"`
	Price  Price `json:"price"`
	Car    *Car  `json:"car,omitempty" bson:"car,omitempty"`
}