package channels

import (
	"context"

	"gitea.perlbach24.de/scripte/nexarch/internal/notify"
)

// InAppSender implementiert notify.Sender fuer den In-App-Kanal
// (Akzeptanzkriterium 2). Nutzt eine Vorlage, falls payload["template_key"]
// gesetzt ist, sonst direkt payload["title"]/["body"].
type InAppSender struct {
	store     *InAppStore
	templates *TemplateStore
}

func NewInAppSender(store *InAppStore, templates *TemplateStore) *InAppSender {
	return &InAppSender{store: store, templates: templates}
}

func (s *InAppSender) Send(ctx context.Context, n notify.Notification) error {
	tenantSlug, _ := n.Payload["tenant_slug"].(string)

	var title, body string
	if templateKey, ok := n.Payload["template_key"].(string); ok && templateKey != "" {
		tmpl, err := s.templates.Resolve(ctx, tenantSlug, templateKey)
		if err != nil {
			return err
		}
		title, body, err = Render(tmpl, n.Payload)
		if err != nil {
			return err
		}
	} else {
		title, _ = n.Payload["title"].(string)
		body, _ = n.Payload["body"].(string)
	}

	_, err := s.store.Create(ctx, tenantSlug, n.Recipient, title, body)
	return err
}