package bluge

import (
	"context"
	"fmt"

	"fiatjaf.com/nostr"
	"fiatjaf.com/nostr/eventstore"
	"fiatjaf.com/nostr/eventstore/internal"
)

func (b *BlugeBackend) ReplaceEvent(ctx context.Context, evt nostr.Event) error {
	b.Lock()
	defer b.Unlock()

	filter := nostr.Filter{Limit: 1, Kinds: []uint16{evt.Kind}, Authors: []nostr.PubKey{evt.PubKey}}
	if nostr.IsAddressableKind(evt.Kind) {
		filter.Tags = nostr.TagMap{"d": []string{evt.Tags.GetD()}}
	}

	shouldStore := true
	for previous := range b.QueryEvents(filter) {
		if internal.IsOlder(previous, evt) {
			if err := b.DeleteEvent(previous.ID); err != nil {
				return fmt.Errorf("failed to delete event for replacing: %w", err)
			}
		} else {
			shouldStore = false
		}
	}

	if shouldStore {
		if err := b.SaveEvent(ctx, evt); err != nil && err != eventstore.ErrDupEvent {
			return fmt.Errorf("failed to save: %w", err)
		}
	}

	return nil
}