package cif

import (
	"time"

	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
	"git.fjla.uk/owlboard/timetable-mgr/helpers"
	"git.fjla.uk/owlboard/timetable-mgr/log"
	"go.uber.org/zap"
)

// Break this down in to smaller, simpler functions
func CifCheck(cfg *helpers.Configuration) error {
	log.Msg.Debug("Checking age of CIF Data")

	metadata, err := dbAccess.GetCifMetadata()
	if err != nil {
		log.Msg.Error("Unable to fetch CifMetadata", zap.Error(err))
		return err
	}
	if metadata == nil {
		log.Msg.Info("No metadata found for last CIF Update, recreating timetable")
		newMeta, err := runUpdate("full", nil)
		if err != nil {
			log.Msg.Error("CIF Update failed", zap.Error(err))
			return err
		}
		ok := dbAccess.PutCifMetadata(*newMeta)
		if !ok {
			log.Msg.Warn("CIF Update Successful but metadata update failed")
			return nil
		}
	}

	london, _ := time.LoadLocation("Europe/London")
	londonTimeNow := time.Now().In(london)
	day := 12 * time.Hour
	updateThreshold := londonTimeNow.Add(-day)
	availableHour := 6

	if londonTimeNow.Hour() >= availableHour {
		if metadata.LastUpdate.Before(updateThreshold) || metadata.LastUpdate.Equal(updateThreshold) {
			newMeta, err := runUpdate("full", metadata)
			if err != nil {
				log.Msg.Error("CIF Update failed", zap.Error(err))
				return err
			}
			if newMeta == nil {
				log.Msg.Info("CIF Update requirements not met, will retry")
				return nil
			}
			ok := dbAccess.PutCifMetadata(*newMeta)
			if !ok {
				log.Msg.Warn("CIF Update Successful but metadata update failed")
				return nil
			}
			return nil
		}
	}
	log.Msg.Info("CIF Data does not require updating at this time", zap.Time("Last Update", metadata.LastUpdate))

	return nil
}