// endpoints contains all http endpoints
// for more complex endpoints the *Handler function is executed first
// by the main programm and it will then run other functions as needed
//
// the filenames represent the route/url for the given endpoint
// when "-" is a "/" so this file is server at "/auto/feiertage"

package endpoints

// this endpoint will be called by crontab and generates the public holidays for a given year
// after that manually added holidays with a "wiederholen" flag are copied over to the new year

import (
	"arbeitszeitmessung/helper/paramParser"
	"arbeitszeitmessung/models"
	"log/slog"
	"net/http"
	"time"

	"github.com/wlbr/feiertage"
)

func FeiertagsHandler(w http.ResponseWriter, r *http.Request) {
	pp := paramParser.New(r.URL.Query())
	slog.Debug("Generating Holidays")
	from := pp.ParseTimestampFallback("from", "2006", time.Now().AddDate(-1, 0, -time.Now().YearDay()))
	to := pp.ParseTimestampFallback("to", "2006", time.Now().AddDate(0, 0, -time.Now().YearDay()+1))

	var publicHolidays map[string]models.PublicHoliday = make(map[string]models.PublicHoliday)

	yearDelta := to.Year() - from.Year()
	var holidays = feiertage.Sachsen(to.Year(), true)
	for _, f := range holidays.Feiertage {
		publicHolidays[f.Time.Format(time.DateOnly)] = models.NewHolidayFromFeiertag(f)
	}

	repeatingHolidays, err := models.GetRepeatingHolidays(from, to.AddDate(0, 0, -1))
	if err != nil {
		slog.Warn("Error getting holidays", slog.Any("Error", err))
	}
	slog.Debug("Found repeating Holidays", "num", len(repeatingHolidays), "from", from, "to", to, "yeardelta", yearDelta)
	for _, day := range repeatingHolidays {
		day.Time = day.Time.AddDate(yearDelta, 0, 0)
		publicHolidays[day.Date().Format(time.DateOnly)] = day
	}
	slog.Debug("Added repeating holidays", "num", len(holidays.Feiertage))
	for _, feiertag := range publicHolidays {
		slog.Debug("Found holiday", "holiday", feiertag)
		if err := feiertag.Insert(); err != nil {
			slog.Warn("Error inserting Feiertag", slog.Any("Error", err))
		}
	}
}