using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace gehGassi.LocalNotifications
{
    /// <summary>
    /// Erweiterungen
    /// </summary>
    public static class Extensions
    {
        /// <summary>
        /// Millisekunden nach Unix
        /// </summary>
        /// <param name="dateTime">Datum</param>
        /// <returns></returns>
        public static long GetMilliSecondsSinceEpoch(this DateTime dateTime)
        {
            var epoch = new DateTime(1970, 1, 1, 0/*h*/, 0/*m*/, 0/*s*/, 0 /*ms*/, DateTimeKind.Utc);
            return Convert.ToInt64((dateTime.ToUniversalTime() - epoch).TotalMilliseconds);
        }

        /// <summary>
        /// In JSON konvertieren
        /// </summary>
        /// <param name="obj">Objekt das serialisiert werden soll</param>
        /// <returns></returns>
        public static string ToJson<T>(this T obj)
        {
            return JsonSerializer.Serialize<T>(obj);
        }

        /// <summary>
        /// Von Json in Objekt deserialisieren
        /// </summary>
        /// <typeparam name="T">Typ</typeparam>
        /// <param name="json">JSON string</param>
        /// <returns>Objekt</returns>
        public static T JsonToObject<T>(this string json)
        {
            return JsonSerializer.Deserialize<T>(json);
        }

        /// <summary>
        /// Liste von Objekten in JSON serialisieren
        /// </summary>
        /// <typeparam name="T">Typ</typeparam>
        /// <param name="json">JSON String</param>
        /// <returns>Liste von Objekten</returns>
        public static List<T> JsonToListObject<T>(this string json)
        {
            return JsonSerializer.Deserialize<List<T>>(json);
        }
    }
}