package service

import (
	"github.com/pocketbase/pocketbase"
	"github.com/pocketbase/pocketbase/core"
	"github.com/pocketbase/pocketbase/tools/cron"
	"htwkalender/service/db"
	"htwkalender/service/events"
	"log"
	"time"
)

func AddSchedules(app *pocketbase.PocketBase) {

	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
		scheduler := cron.New()

		// Every hour update all courses (5 segments - minute, hour, day, month, weekday) "0 * * * *"
		// Every three hours update all courses (5 segments - minute, hour, day, month, weekday) "0 */3 * * *"
		// Every 10 minutes update all courses (5 segments - minute, hour, day, month, weekday) "*/10 * * * *"
		scheduler.MustAdd("updateCourse", "0 */3 * * *", func() {
			courses := events.GetAllCourses(app)
			for _, course := range courses {
				err := events.UpdateModulesForCourse(app, course)
				if err != nil {
					log.Println("Update Course: " + course + " failed")
					log.Println(err)
				} else {
					log.Println("Update Course: " + course + " successful")
				}
			}
		})

		// Every sunday at 3am clean all courses (5 segments - minute, hour, day, month, weekday) "0 3 * * 0"
		scheduler.MustAdd("cleanFeeds", "0 3 * * 0", func() {
			feeds, err := db.GetAllFeeds(app)
			if err != nil {
				log.Println("CleanFeeds: get all feeds failed")
				return
			}
			for _, feed := range feeds {
				// if retrieved time is older than a half year delete feed
				if feed.GetTime("retrieved").Before(time.Now().AddDate(0, -6, 0)) {
					err = app.Dao().DeleteRecord(feed)
					if err != nil {
						log.Println("CleanFeeds: delete feed " + feed.GetId() + " failed")
						log.Println(err)
					} else {
						log.Println("CleanFeeds: delete feed " + feed.GetId() + " successful")
					}
				}
			}
		})
		scheduler.Start()
		return nil
	})

}