package main

import (
	"fmt"
	"log"
	"reflect"
)

type (
	SettingsService struct {
		db *DB
	}
)

type settings struct {
    FoodDaysLookback             string
    FoodAggregatedDaysLookback   string
    WeightDaysLookback           string
    WeightAggregatedDaysLookback string
}

var Settings settings

func (s *SettingsService) LoadSettings() error {
	if s.db == nil || !s.db.Ready {
		return fmt.Errorf("cannot load Settings, db is nil or is not ready")
	}

    settingsValue := reflect.ValueOf(&Settings).Elem()
    settingsType := settingsValue.Type()

    for i := 0; i < settingsValue.NumField(); i++ {
        field := settingsType.Field(i)
        key := field.Name

        var value string
        err := s.db.readConn.QueryRow("SELECT value FROM settings WHERE key = ?", key).Scan(&value)
        if err != nil {
            log.Printf("error getting setting for key %s: %v", key, err)
            continue
        }

        settingsValue.Field(i).SetString(value)
        log.Println(key, value)
    }
	return nil
}