package nostr

import (
	"context"
	"errors"

	gn "github.com/nbd-wtf/go-nostr"
)

var ErrNoRelayAccepted = errors.New("no relay accepted event")

// Publish sends an already-signed event to all relays in the pool.
// Success if at least one relay accepts.
func Publish(ctx context.Context, p *Pool, ev *gn.Event) error {
	var lastErr error
	accepted := 0
	for _, url := range p.URLs() {
		r, err := p.Connect(ctx, url)
		if err != nil {
			lastErr = err
			continue
		}
		if err := r.Publish(ctx, *ev); err != nil {
			lastErr = err
			continue
		}
		accepted++
	}
	if accepted == 0 {
		if lastErr != nil {
			return lastErr
		}
		return ErrNoRelayAccepted
	}
	return nil
}