package eventEntriesNotifier

import (
	"git.stuve.uni-ulm.de/stuve-it/stuve-it-backend/logger"
	"github.com/pocketbase/pocketbase"
	"github.com/pocketbase/pocketbase/core"
	"github.com/pocketbase/pocketbase/tools/mailer"
	"github.com/pocketbase/pocketbase/tools/template"
	"net/mail"
)

// sendEmailNotification sends an email notification to the user
func sendEmailNotification(app *pocketbase.PocketBase, recordId string, STATUS string) error {
	registry := template.NewRegistry()

	record, err := app.Dao().FindRecordById("eventListSlotEntriesWithUser", recordId)
	if err != nil {
		return err
	}

	user, err := app.Dao().FindRecordById("users", record.GetString("user"))
	if err != nil {
		return err
	}

	// render email template
	html, err := registry.LoadFiles(
		"html/eventEntryNotification.html",
	).Render(map[string]any{
		"STATUS":     STATUS,
		"EVENT_NAME": record.GetString("eventName"),
		"APP_URL":    app.Settings().Meta.AppUrl,
	})
	if err != nil {
		return err
	}

	// send email
	email := &mailer.Message{
		From: mail.Address{
			Address: app.Settings().Meta.SenderAddress,
			Name:    app.Settings().Meta.SenderName,
		},
		To:      []mail.Address{{Address: user.GetString("email")}},
		Subject: "[StuVe IT] Info zu einer Event Anmeldung",
		HTML:    html,
	}
	if err := app.NewMailClient().Send(email); err != nil {
		return err
	}
	return nil
}

// InitEventEntriesNotifier initializes the eventEntriesNotifier email notifier
func InitEventEntriesNotifier(app *pocketbase.PocketBase, e *core.ServeEvent) error {

	logger.LogInfoF("Adding eventEntriesNotifier email notifier")

	app.OnModelAfterCreate("eventListSlotEntries").Add(func(e *core.ModelEvent) error {
		// send email notification
		err := sendEmailNotification(app, e.Model.GetId(), "created")
		if err != nil {
			logger.LogErrorF("Error sending eventEntry email notification: %v", err)
		}
		return nil
	})

	app.OnModelAfterCreate("eventListSlotEntries").Add(func(e *core.ModelEvent) error {
		// send email notification
		err := sendEmailNotification(app, e.Model.GetId(), "updated")
		if err != nil {
			logger.LogErrorF("Error sending eventEntry email notification: %v", err)
		}
		return nil
	})

	app.OnModelAfterDelete("eventListSlotEntries").Add(func(e *core.ModelEvent) error {
		// send email notification
		err := sendEmailNotification(app, e.Model.GetId(), "deleted")
		if err != nil {
			logger.LogErrorF("Error sending eventEntry email notification: %v", err)
		}
		return nil
	})

	return nil
}