using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using PARR.DAL.CacheServices;
using PARR.DAL.Context;
using PARR.DAL.Models;
using PARR.DAL.Services.Abstracts;
using PARR.DAL.Services.Interfaces;
using PARR.DAL.Settings;

namespace PARR.DAL.Services.Implementations
{
    internal class WeekendDayService : BaseService<WeekendDay>, IWeekendDayService
    {
        private readonly DataContext dataContext;
        private readonly ILogger<WeekendDayService> logger;
        private readonly IRedisCacheService redisCacheService;
        private readonly WeekendCacheSettings weekendCacheSettings;

        protected override DbSet<WeekendDay> EntitySet => dataContext.WeekendDays;

        protected override DataContext EntitiContext => dataContext;

        public WeekendDayService(
            DataContext dataContext,
            ILogger<WeekendDayService> logger,
            IRedisCacheService redisCacheService,
            WeekendCacheSettings weekendCacheSettings
            ) : base(logger)
        {
            this.dataContext = dataContext;
            this.logger = logger;
            this.redisCacheService = redisCacheService;
            this.weekendCacheSettings = weekendCacheSettings;
        }


        public IQueryable<DateOnly> GetWeekends(DateOnly start, DateOnly end)
        {
            return EntitySet.Where(t => t.Date >= start && t.Date <= end).Select(t => t.Date);
        }



        public async Task<bool> IsWorkDayAsync(DateOnly date, bool useCache = false)
        {
            if (useCache)
            {
                // смотрим, есть ли в кэше рабочий день
                var workdayInCache = await redisCacheService.GetCachedDataAsync<DateOnly?>(GetWorkDayKey(date));
                if (workdayInCache != null)
                    return true;

                // смотрим, есть ли в кэше выходной день
                var weekendInCache = await redisCacheService.GetCachedDataAsync<DateOnly?>(GetWeekendKey(date));
                if (weekendInCache != null)
                    return false;
            }

            var weekendInDb = await EntitySet.FirstOrDefaultAsync(t => t.Date == date);

            var isWorkday = weekendInDb == null;

            //сохраняем всегда в КЭШ значение выходного и рабочего дня
            var cacheKey = isWorkday ? GetWorkDayKey(date) : GetWeekendKey(date);
            //TODO:!!! Тут настройки вынести в DB settings
            await redisCacheService.SetCachedDataAsync(cacheKey, date, weekendCacheSettings.WeekendTtl);

            return isWorkday;
        }


        private string GetWeekendKey(DateOnly day)
        {
            return $"weekend_{day.ToString("yyyy-MM-dd")}";
        }

        private string GetWorkDayKey(DateOnly day)
        {
            return $"workday_{day.ToString("yyyy-MM-dd")}";
        }

    }
}