using System.Collections.Concurrent;

namespace HotelPms.Client.Blazor.Util
{
    /// <summary>
    /// バッファー保存用メモリDB
    /// </summary>
    public class CacheStorage : IDisposable
    {
        public enum Key : int
        {
            /// <summary>
            /// マスタ設定画面などViewModel伝送用
            /// </summary>
            ViewModel = 0,
            RoomTypeName,
            RoomName,
        }


        private static CacheStorage m_Instance;
        public static CacheStorage Instance 
        { 
            get 
            {
                if (m_Instance == null) { m_Instance = new CacheStorage(); }
                return m_Instance; 
            } 
        }

        /// <summary>
        /// バッファー保存用メモリDB
        /// </summary>
        public ConcurrentDictionary<string, object> Data { get; set; } = new ConcurrentDictionary<string, object>();

        public void Dispose()
        {
            Data.Clear();
        }

        public object Get(Key key)
        {
            return Get(key.ToString());
        }

        public object Get(string key)
        {
            try
            {
                Data.TryGetValue(key, out object value);
                return value; 
            }
            catch
            {
                return null;
            }
        }

        public void Set(Key key, object value)
        {
            Set(key.ToString(), value);
        }

        public void Set(string key, object value)
        {
            Data[key] = value;
        }

        /// <summary>
        /// マスタデータ
        /// </summary>
        /// <param name="id"></param>
        /// <param name="value"></param>
        public void SetMasterName(Key key, int id, string value)
        {
            ConcurrentDictionary<int, string> dict = Get(key) as ConcurrentDictionary<int, string>;
            if (dict == null) 
            {
                dict = new ConcurrentDictionary<int, string>();
                Set(key, dict); 
            }
            dict[id] = value;
        }

        /// <summary>
        /// 存在しなかったら、nullで返す
        /// </summary>
        /// <param name="key"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        public string GetMasterName(Key key, int id)
        {
            ConcurrentDictionary<int, string> dict = Get(key) as ConcurrentDictionary<int, string>;
            if (dict == null) { return string.Empty; }
            if (!dict.ContainsKey(id)) { return string.Empty; }
            return dict[id];
        }
    }
}