package event

import (
	"errors"
	"time"

	"github.com/google/uuid"
)

type EventDestType uint8

const (
	EH_DEST_TYPE_DB   EventDestType = iota + 1 // dest. type: data base
	EH_DEST_TYPE_BRK                           // dest. type: data message broker
	EH_DEST_TYPE_PIPE                          // dest. type: unix or nt pipe
)

const EH_WAIT_TIME time.Duration = (time.Second * 2) // sec to wait for retry

type MetaData map[string]any

func (m MetaData) Get(key string) (any, error) {
	value, ok := m[key]
	if !ok {
		return nil, errors.New("key not found")
	}
	return value, nil
}

func (m MetaData) Set(key string, value any) {
	m[key] = value
}

func (m MetaData) Delete(key string) {
	delete(m, key)
}

func NewMetaData() MetaData {
	return make(map[string]any)
}

// Event struct
type Event struct {
	EventID       string
	EventTopic    string
	EventSender   string
	EventDestType EventDestType
	EventMeta     MetaData
	EventData     any
	EventTime     string
}

// NewEvent creates a new event
func NewEvent(eventSender, eventTopic string, eventMeta MetaData, eventData any) *Event {
	// check if eventMeta is nil
	if eventMeta == nil {
		eventMeta = NewMetaData()
	}
	// return event
	return &Event{
		EventID:     uuid.NewString(),
		EventTopic:  eventTopic,
		EventSender: eventSender,
		EventMeta:   eventMeta,
		EventData:   eventData,
		EventTime:   time.Now().UTC().Format(time.RFC3339),
	}
}