using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using StackExchange.Redis;
using WIDESEAWCS_RedisService.Connection;
using WIDESEAWCS_RedisService.Options;

namespace WIDESEAWCS_RedisService.Session
{
    public class RedisSessionStorage : ISessionStorage
    {
        private readonly IRedisConnectionManager _connectionManager;
        private readonly RedisOptions _options;
        private readonly ILogger<RedisSessionStorage> _logger;

        public RedisSessionStorage(
            IRedisConnectionManager connectionManager,
            IOptions<RedisOptions> options,
            ILogger<RedisSessionStorage> logger)
        {
            _connectionManager = connectionManager;
            _options = options.Value;
            _logger = logger;
        }

        private string BuildKey(string sessionId) => $"{_options.KeyPrefix}session:{sessionId}";

        public bool Set(string sessionId, string key, string value, TimeSpan? expiry = null)
        {
            var db = _connectionManager.GetDatabase();
            var fullKey = BuildKey(sessionId);
            db.HashSet(fullKey, key, value);
            if (expiry.HasValue)
                db.KeyExpire(fullKey, expiry);
            return true;
        }

        public string? Get(string sessionId, string key)
        {
            var val = _connectionManager.GetDatabase().HashGet(BuildKey(sessionId), key);
            return val.IsNullOrEmpty ? null : val.ToString();
        }

        public bool Remove(string sessionId, string key)
        {
            return _connectionManager.GetDatabase().HashDelete(BuildKey(sessionId), key);
        }

        public bool DestroySession(string sessionId)
        {
            return _connectionManager.GetDatabase().KeyDelete(BuildKey(sessionId));
        }

        public bool SessionExists(string sessionId)
        {
            return _connectionManager.GetDatabase().KeyExists(BuildKey(sessionId));
        }

        public bool RefreshSession(string sessionId, TimeSpan expiry)
        {
            return _connectionManager.GetDatabase().KeyExpire(BuildKey(sessionId), expiry);
        }
    }
}