using Microsoft.Extensions.Caching.Distributed;
using System.Text.Json;

namespace IM.Commons
{
    public class RedisCacheService : IRedisService
    {
        private readonly IDistributedCache _cache;
        public RedisCacheService(IDistributedCache cache)
        {
            _cache = cache;
        }

        public async Task<T?> GetAsync<T>(string key)
        {
            var valueBytes = await _cache.GetAsync(key);
            if (valueBytes is null || valueBytes.Length == 0) return default;
            return JsonSerializer.Deserialize<T>(valueBytes);
        }

        public async Task RemoveAsync(string key) => await _cache.RemoveAsync(key);

        public async Task SetAsync<T>(string key, T value, TimeSpan? expiration = null)
        {
            var options = new DistributedCacheEntryOptions
            {
                AbsoluteExpirationRelativeToNow = expiration ?? TimeSpan.FromHours(1)
            };
            var valueBytes = JsonSerializer.SerializeToUtf8Bytes(value);
            await _cache.SetAsync(key, valueBytes, options);
        }

    }
}