using System;
using System.Linq;
using T3k3rg0.Helpers.Data;
using T3k3rg0.Helpers.Models;

namespace T3k3rg0.Helpers
{
    public static class NapiszarService
    {
        private static readonly TimeZoneInfo HungarianTimeZone =
            TimeZoneInfo.FindSystemTimeZoneById("Europe/Budapest");

        public static string GetRandomSzar()
        {
            using var db = new NapiszarDbContext();
            var count = db.Joslatok.Count();

            if (count == 0)
                return "Nincs elérhető szar";

            var rnd = new Random();
            var skip = rnd.Next(count);

            var szar = db.Joslatok.Skip(skip).FirstOrDefault();
            return szar?.Szoveg ?? "Valami szar hiba történt";
        }

        public static bool HasUsedToday(ulong userId)
        {
            using var db = new NapiszarDbContext();

            var usage = db.DailyUsages.FirstOrDefault(u => u.UserId == (long)userId);
            if (usage == null)
                return false;

            var today = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, HungarianTimeZone).Date;
            return usage.LastUsed.Date == today;
        }

        public static void LogUsage(ulong userId)
        {
            using var db = new NapiszarDbContext();

            var today = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, HungarianTimeZone);

            var existing = db.DailyUsages.FirstOrDefault(u => u.UserId == (long)userId);
            if (existing == null)
            {
                db.DailyUsages.Add(new DailyUsage
                {
                    UserId = (long)userId,
                    LastUsed = today
                });
            }
            else
            {
                existing.LastUsed = today;
                db.DailyUsages.Update(existing);
            }

            db.SaveChanges();
        }
    }
}