using System;
using System.Linq;
using System.Text;
using StackExchange.Redis;

namespace Sony.Filtr.PlaylistGeneration
{
    public class ArtistCorrectionManager
    {
        private readonly IDatabase _database;

        public ArtistCorrectionManager(IDatabase database)
        {
            _database = database;
        }

        public string GetCorrectSpelling(string artistName)
        {
            if (IsConnected())
            {
                var key = "KnownMisspelling:" + artistName;
                var get = _database.StringGet(key);
                if (!get.HasValue)
                    return null;
                return RedisHelper.GetString(get);
            }
            return null;
        }

        private bool IsConnected()
        {
            return _database.IsConnected("IsConnected");
        }

        public void SetMisspelled(string wrong, string right)
        {
            if (IsConnected())
            {
                var key = "KnownMisspelling:" + wrong;
                _database.StringSet(key, Encoding.Unicode.GetBytes(right), TimeSpan.FromSeconds(10080));
            }
        }

        public void SetKnownUnknown(string artistName)
        {
            if (IsConnected())
            {
                var key = "KnownUnknown:" + artistName;
                _database.StringSet(key, "true", TimeSpan.FromSeconds(10080));
            }
        }

        public bool IsKnownUnknown(string artistName)
        {
            if (IsConnected())
            {
                return _database.KeyExists("KnownUnknown:" + artistName);
            }
            return false;
        }
    }
}