package customevent

import (
	"strings"

	"github.com/pkg/errors"
	"gopkg.in/irc.v4"

	"github.com/Luzifer/twitch-bot/v3/plugins"
)

type actor struct{}

func (actor) Execute(_ *irc.Client, m *irc.Message, r *plugins.Rule, eventData *plugins.FieldCollection, attrs *plugins.FieldCollection) (preventCooldown bool, err error) {
	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")
	}

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

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

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

func (actor) Validate(tplValidator plugins.TemplateValidatorFunc, 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")
	}

	for _, field := range []string{"fields", "schedule_in"} {
		if err = tplValidator(attrs.MustString(field, ptrStringEmpty)); err != nil {
			return errors.Wrapf(err, "validating %s template", field)
		}
	}

	return nil
}