using AngleSharp.Dom;
using EnvelopeGenerator.Application.Configurations;
using EnvelopeGenerator.Application.Contracts;
using EnvelopeGenerator.Application.Extensions;
using Microsoft.Extensions.Caching.Distributed;
using Microsoft.Extensions.Options;

namespace EnvelopeGenerator.Application.Services
{
    public class EnvelopeReceiverCache : IEnvelopeReceiverCache
    {
        private readonly EnvelopeReceiverCacheParams _cacheParams;

        private readonly DistributedCacheEntryOptions _codeCacheOptions;

        private readonly IDistributedCache _cache;

        public EnvelopeReceiverCache(IOptions<EnvelopeReceiverCacheParams> cacheParamOptions, IDistributedCache cache)
        {
            _cacheParams = cacheParamOptions.Value;
            _codeCacheOptions = new() { AbsoluteExpirationRelativeToNow = cacheParamOptions.Value.CodeCacheValidityPeriod };
            _cache = cache;
        }

        public async Task<string?> GetSmsCodeAsync(string envelopeReceiverId)
        {
            var code_key = string.Format(_cacheParams.CodeCacheKeyFormat, envelopeReceiverId);
            return await _cache.GetStringAsync(code_key);
        }

        public async Task<DateTime> SetSmsCodeAsync(string envelopeReceiverId, string code)
        {
            // set key
            var code_key = string.Format(_cacheParams.CodeCacheKeyFormat, envelopeReceiverId);
            await _cache.SetStringAsync(code_key, code, _codeCacheOptions);

            // set expiration
            var code_expiration_key = string.Format(_cacheParams.CodeExpirationCacheKeyFormat, envelopeReceiverId);
            var expiration = DateTime.Now + _cacheParams.CodeCacheValidityPeriod;
            await _cache.SetDateTimeAsync(code_expiration_key, expiration, _codeCacheOptions);
            return expiration;
        }

        public async Task<DateTime?> GetSmsCodeExpirationAsync(string envelopeReceiverId)
        {
            var code_expiration_key = string.Format(_cacheParams.CodeExpirationCacheKeyFormat, envelopeReceiverId);
            return await _cache.GetDateTimeAsync(code_expiration_key);
        }
    }
}