//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
//Copyright (C) 2024 HTWKalender support@htwkalender.de

//This program is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.

//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Affero General Public License for more details.

//You should have received a copy of the GNU Affero General Public License
//along with this program.  If not, see <https://www.gnu.org/licenses/>.

package service

import (
	"github.com/pocketbase/pocketbase"
	"github.com/pocketbase/pocketbase/core"
	"github.com/pocketbase/pocketbase/tools/cron"
	"htwkalender/service/course"
	"htwkalender/service/feed"
	"htwkalender/service/fetch/sport"
	v2 "htwkalender/service/fetch/v2"
	"htwkalender/service/functions/time"
	"log/slog"
	"strconv"
)

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() {
			slog.Info("Started updating courses schedule")
			course.UpdateCourse(app)
		})

		// Every sunday at 1am clean all courses (5 segments - minute, hour, day, month, weekday) "0 3 * * 0"
		scheduler.MustAdd("cleanFeeds", "0 1 * * 0", func() {
			// clean feeds older than 6 months
			slog.Info("Started cleaning feeds schedule")
			feed.ClearFeeds(app.Dao(), 6, time.RealClock{})
		})

		// Every sunday at 3am fetch all sport events (5 segments - minute, hour, day, month, weekday) "0 2 * * 0"
		scheduler.MustAdd("fetchSportEvents", "0 3 * * 0", func() {
			slog.Info("Started fetching sport events schedule")
			sportEvents, err := sport.FetchAndUpdateSportEvents(app)
			if err != nil {
				slog.Error("Failed to fetch and save sport events: %v", err)
			}
			slog.Info("Successfully fetched " + strconv.FormatInt(int64(len(sportEvents)), 10) + " sport events")
		})

		//fetch all events for semester and delete  from remote this should be done every sunday at 2am
		scheduler.MustAdd("fetchEvents", "0 2 * * 0", func() {
			savedEvents, err := v2.FetchAllEventsAndSave(app, time.RealClock{})
			if err != nil {
				slog.Error("Failed to fetch and save events: %v", err)
			} else {
				slog.Info("Successfully fetched " + strconv.FormatInt(int64(len(savedEvents)), 10) + " events")
			}
		})
		scheduler.Start()
		return nil
	})
}