package customevent

import (
	"strings"

	"github.com/go-irc/irc"
	"github.com/pkg/errors"

	"github.com/Luzifer/twitch-bot/plugins"
)

type actor struct{}

func (a actor) Execute(c *irc.Client, m *irc.Message, r *plugins.Rule, eventData *plugins.FieldCollection, attrs *plugins.FieldCollection) (preventCooldown bool, err error) {
	ptrStringEmpty := func(v string) *string { return &v }("")

	fd, err := formatMessage(attrs.MustString("fields", ptrStringEmpty), m, r, eventData)
	if err != nil {
		return false, errors.Wrap(err, "executing fields template")
	}

	if fd == "" {
		return false, errors.New("fields template evaluated to empty string")
	}

	return false, errors.Wrap(
		triggerEvent(plugins.DeriveChannel(m, eventData), strings.NewReader(fd)),
		"triggering event",
	)
}

func (a actor) IsAsync() bool { return false }
func (a actor) Name() string  { return actorName }

func (a actor) Validate(attrs *plugins.FieldCollection) (err error) {
	if v, err := attrs.String("fields"); err != nil || v == "" {
		return errors.New("fields is expected to be non-empty string")
	}

	return nil
}